Integrated Monitoring System for Deep Overlying Strata and Surface Movement and Deformation in Coal Mines

Abstract

The present invention provides an integrated monitoring system for deep overlying strata and surface movement and deformation in coal mining, which relates to the technical field of monitoring deep geotechnical bodies in coal mining subsidence areas. The system includes a plurality of double-ended three-claw hydraulic anchor claws, a plurality of wire displacement sensors with parallel double steel spring plates, GNSS monitoring equipment, and overlying strata separation numerical monitoring equipment. By collecting overlying strata movement and deformation data and real-time surface movement and deformation data, accurate monitoring of the movement and deformation values of internal monitoring points in the overlying strata after coal mining and the relative separation numerical values between various points in the overlying strata is achieved. The integrated monitoring system for deep overlying strata and surface movement and deformation provided by the present invention integrates deep overlying strata movement and deformation monitoring equipment with a GNSS real-time monitoring system at the orifice, can partition the overlying strata movement and deformation area and give different levels of alarm prompts, and further monitor the separation space inside the overlying strata.

Description

Technical Field

[0001] The present invention relates to the technical field of deep geotechnical monitoring in coal mining subsidence areas, and particularly relates to an integrated monitoring system for deep overlying strata and surface movement and deformation in coal mines. Background Art

[0002] After the mining space of the underground working face reaches a certain size, the overlying strata gradually bend - sink - break - collapse - accumulate in the goaf. Along with the continuous increase of the mining size of the working face, the movement and deformation of the lower strata are gradually transmitted upward from bottom to top. At the same time, due to the differences in lithology, the appearance of fissures and separation spaces in the overlying strata, the internal overlying rock and soil layers also show non - simultaneous, non - synchronous, and non - identical movement and deformation values. The movement and deformation of the overlying rock and soil layers are reflected on the surface as surface subsidence.

[0003] Currently, the monitoring areas for the movement and deformation inside the overlying rock and soil layers caused during coal mining mainly focus on the roof and floor (the roof separation monitoring is about 4 times the height of the mining thickness, and the floor monitoring is within about 30m depth) or only the surface movement and deformation monitoring.

[0004] There is no relatively mature method and theory for the movement and deformation monitoring within the entire rock and soil layer from the main roof to the surface, and there is also no monitoring system with a large range, suitable for the drastic movement and deformation in coal mines, and mature and stable. At the same time, the current overlying strata movement and deformation monitoring equipment is independent of common surface movement observation stations, GNSS continuous monitoring stations, etc. on the surface, and the two cannot achieve data fusion and scientific unity. Therefore, based on the deformation data obtained by the overlying strata movement and deformation monitoring equipment, differential monitoring of the inside of the overlying strata cannot be realized, and further monitoring of the separation space cannot be carried out. Summary of the Invention

[0005] The present invention provides an integrated monitoring system for deep overlying strata and surface movement and deformation in coal mines to solve the above - mentioned problems existing in the prior art.

[0006] The present invention provides an integrated monitoring system for deep overlying strata and surface movement and deformation in coal mines, including: a plurality of double - end three - claw hydraulic anchor claws, a plurality of wire - type displacement sensors with parallel double - layer steel spring washers, GNSS monitoring equipment, and overlying strata separation numerical monitoring equipment;

[0007] The double - end three - claw hydraulic anchor claws and the wire - type displacement sensors with parallel double - layer steel spring washers are used to collect overlying strata movement and deformation data;

[0008] The GNSS monitoring equipment is used to collect real - time surface movement and deformation data;

[0009] The GNSS monitoring device is further configured to obtain the moving and deforming quantity values of the monitoring points inside the overlying strata based on the moving and deforming data of the overlying strata and the real-time moving and deforming data of the ground surface; the moving and deforming quantity values of the monitoring points inside the overlying strata are equal to the sum of the moving and deforming data of the overlying strata and the real-time moving and deforming data of the ground surface.

[0010] The GNSS monitoring device is further configured to divide the overlying strata moving and deforming area into at least four zones, namely blue, yellow, orange, and red zones, based on the moving and deforming quantity values of the monitoring points inside the overlying strata, and give an alarm prompt.

[0011] The overlying strata separation numerical monitoring device is configured to calculate the relative separation numerical value between two adjacent monitoring points inside the overlying strata. The expression for calculating the relative separation numerical value between two adjacent monitoring points inside the overlying strata is as follows:

[0012] W L =W i -W i-1 -H i-1→i ×K Ai

[0013] Wherein, W L represents the separation numerical value between two adjacent monitoring points, W i and W i-1 respectively represent the moving and deforming quantity values of two adjacent monitoring points inside the overlying strata. The thickness H i-1→i of the rock and soil layer between the two adjacent monitoring points = H i -H i-1 , H i and H i-1 respectively represent the installation depths of the double-end three-claw hydraulic anchor claws installed at the two adjacent monitoring points. K Ai represents the coefficient of rock dilation between two adjacent rock and soil layers corresponding to the two adjacent monitoring points.

[0014] According to an integrated monitoring system for deep overlying strata and ground surface movement and deformation during coal mining provided by the present invention, the double-end three-claw hydraulic anchor claw includes a three-claw anchor claw located at the top and opening upward, and a three-claw anchor claw located at the bottom and opening downward. The three-claw anchor claws are all connected by hydraulic pipes. A hydraulic oil cylinder is provided inside the cylinder body of the double-end three-claw hydraulic anchor claw, and the oil valve of the hydraulic oil cylinder is a mechanical cam.

[0015] According to an integrated monitoring system for deep overlying strata and ground surface movement and deformation during coal mining provided by the present invention, the double-end three-claw hydraulic anchor claw controls the opening and contraction of the anchor claw through hydraulic pressure;

[0016] When the hydraulic oil cylinder is pressurized, the mechanical cam jacks up upward to control the contraction of the claw body of the anchor claw.

[0017] When the hydraulic cylinder is depressurized, the mechanical cam moves downward to control the opening of the claw body of the anchor claw.

[0018] According to an integrated monitoring system for deep overlying strata and surface movement and deformation in coal mining provided by the present invention, the wire displacement sensor with parallel double steel elastic pieces includes at least two parallel steel elastic pieces.

[0019] According to an integrated monitoring system for deep overlying strata and surface movement and deformation in coal mining provided by the present invention, each double-end three-claw hydraulic anchor claw is respectively installed at different depths in the deep overlying strata of coal mining;

[0020] Each double-end three-claw hydraulic anchor claw is respectively connected to the wire displacement sensor with parallel double steel elastic pieces through a wire rope measuring line.

[0021] The present invention also provides an integrated monitoring method for deep overlying strata and surface movement and deformation in coal mining, including the following steps:

[0022] Determine the movement and deformation value of the monitoring point inside the overlying strata and the installation depth of the double-end three-claw hydraulic anchor claw installed at two adjacent monitoring points; the movement and deformation value of the monitoring point inside the overlying strata is obtained by summing the overlying strata movement and deformation data and the surface real-time movement and deformation data by the GNSS monitoring device; the overlying strata movement and deformation data is jointly collected by multiple double-end three-claw hydraulic anchor claws and multiple wire displacement sensors with parallel double steel elastic pieces; the surface real-time movement and deformation data is collected by the GNSS monitoring device;

[0023] Based on the movement and deformation value of the monitoring point inside the overlying strata and the installation depth of the double-end three-claw hydraulic anchor claw installed at two adjacent monitoring points, calculate the relative separation value between two adjacent monitoring points inside the overlying strata; the expression for calculating the relative separation value between two adjacent monitoring points inside the overlying strata is as follows:

[0024] W L =W i -W i-1 -H i-1→i ×K Ai

[0025] Wherein, W L represents the separation value between two adjacent monitoring points, W i and W i-1 respectively represent the movement and deformation values of two adjacent monitoring points inside the overlying strata, and the thickness H i-1→i of the rock and soil layer between the two adjacent monitoring points i =H i-1 -Hi and H i-1 respectively represent the installation depths of the double - end three - claw hydraulic anchor claws installed at the two adjacent monitoring points, and K Ai represents the rock dilatancy coefficient between two adjacent rock and soil layers corresponding to the two adjacent monitoring points.

[0026] The present invention also provides an integrated monitoring device for deep overburden and surface movement and deformation in coal mining, including the following modules:

[0027] A determination module, used to determine the movement and deformation values of the monitoring points inside the overburden and the installation depths of the double - end three - claw hydraulic anchor claws installed at two adjacent monitoring points; the movement and deformation values of the monitoring points inside the overburden are obtained by summing the overburden movement and deformation data and the real - time surface movement and deformation data by the GNSS monitoring device; the overburden movement and deformation data are jointly collected by a plurality of the double - end three - claw hydraulic anchor claws and a plurality of wire - displacement sensors with parallel double - layer steel spring plates; the real - time surface movement and deformation data are collected by the GNSS monitoring device;

[0028] A calculation module, used to calculate the relative separation value between two adjacent monitoring points inside the overburden based on the movement and deformation values of the monitoring points inside the overburden and the installation depths of the double - end three - claw hydraulic anchor claws installed at two adjacent monitoring points; the expression for calculating the relative separation value between two adjacent monitoring points inside the overburden is as follows:

[0029] W L =W i -W i-1 -H i-1→i ×K Ai

[0030] wherein, W L represents the separation value between two adjacent monitoring points, and W i and W i-1 respectively represent the movement and deformation values of two adjacent monitoring points inside the overburden, the thickness H i-1→i of the rock and soil layer between the two adjacent monitoring points = H i -H i-1 , H i and H i-1 respectively represent the installation depths of the double - end three - claw hydraulic anchor claws installed at the two adjacent monitoring points, and K Ai represents the rock dilatancy coefficient between two adjacent rock and soil layers corresponding to the two adjacent monitoring points.

[0031] The present invention also provides an electronic device, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the computer program, the integrated monitoring method for deep overlying strata and surface movement and deformation in coal mining is implemented.

[0032] The present invention also provides a non-transitory computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the integrated monitoring method for deep overlying strata and surface movement and deformation in coal mining is implemented.

[0033] The present invention also provides a computer program product, including a computer program. When the computer program is executed by a processor, the integrated monitoring method for deep overlying strata and surface movement and deformation in coal mining is implemented.

[0034] An integrated monitoring system for deep overlying strata and surface movement and deformation in coal mining provided by the present invention, through an improved double-end three-claw hydraulic anchor claw and a wire displacement sensor with parallel double steel shrapnel, jointly collects overlying strata movement and deformation data, improving the accuracy of real-time monitoring of overlying strata movement and deformation caused by coal mining; through a GNSS monitoring device, it collects real-time surface movement and deformation data and calculates the movement and deformation values of internal monitoring points in the overlying strata, realizing real-time monitoring of the absolute movement and deformation of the deformation values of internal monitoring points in the overlying strata, obtaining the true movement values of the rock strata, and based on the movement and deformation values of internal monitoring points in the overlying strata, partitioning the overlying strata movement and deformation area and giving different levels of alarm prompts, improving the safety and reliability of the coal mining process; through an overlying strata separation numerical monitoring device, and defining an expression for calculating the relative separation numerical value between two adjacent monitoring points in the overlying strata, realizing accurate monitoring of the relative separation numerical value between each point in the overlying strata after coal mining, and further providing reliable data support for the utilization of the subsidence area and roof control. An integrated monitoring system for deep overlying strata and surface movement and deformation in coal mining provided by the present invention integrates deep overlying strata movement and deformation monitoring equipment with a GNSS real-time monitoring system at the hole mouth, having the advantages of a large monitoring range, being able to adapt to various situations of severe movement and deformation in coal mines, and high stability, and being able to realize differential monitoring of the interior of the overlying strata and further monitoring of the separation space. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0036] Figure 1It is a schematic diagram of the installation position of the anchor claw of the monitoring point in the integrated monitoring system for deep overlying strata and surface movement and deformation in coal mining provided by the present invention.

[0037] Figure 2 It is a schematic diagram of the GNSS monitoring sub-station of the monitoring point in the integrated monitoring system for deep overlying strata and surface movement and deformation in coal mining provided by the present invention.

[0038] Figure 3 It is a schematic diagram of the anchor claw structure in the integrated monitoring system for deep overlying strata and surface movement and deformation in coal mining provided by the present invention.

[0039] Figure 4 It is a schematic diagram of the mechanical cam controlling the contraction and expansion of the anchor claw in the integrated monitoring system for deep overlying strata and surface movement and deformation in coal mining provided by the present invention.

[0040] Figure 5 It is a schematic diagram of the wire displacement sensor of the expansion and parallel double-rebound device in the integrated monitoring system for deep overlying strata and surface movement and deformation in coal mining provided by the present invention.

[0041] Figure 6 It is a schematic diagram of the improved variable diameter of the wire spool of the wire displacement sensor in the integrated monitoring system for deep overlying strata and surface movement and deformation in coal mining provided by the present invention.

[0042] Figure 7 It is a schematic diagram of the structure of the internal pulley of the transmission line pole in the integrated monitoring system for deep overlying strata and surface movement and deformation in coal mining provided by the present invention.

[0043] Figure 8 It is a schematic diagram of the position of the fixed platform on the transmission line pole in the integrated monitoring system for deep overlying strata and surface movement and deformation in coal mining provided by the present invention.

[0044] Figure 9 It is a schematic diagram of the flow of the integrated monitoring method for deep overlying strata and surface movement and deformation in coal mining provided by the present invention.

[0045] Figure 10 It is a schematic diagram of the structure of the integrated monitoring device for deep overlying strata and surface movement and deformation in coal mining provided by the present invention.

[0046] Figure 11 It is a schematic diagram of the structure of the electronic device provided by the present invention. Detailed implementation manners

[0047] At present, the monitoring equipment for overburden separation during coal mining includes fiber optic small deformation monitoring equipment (range less than 20 cm), layered settlement monitoring marks combined with radio frequency identification technology (range extended to 50 cm), wireline displacement monitoring equipment with counting hubs, and separation monitoring methods based on numerical simulation or similar material simulation. Such overburden layer monitoring equipment either only appears in theory or has a small separation monitoring range and cannot scientifically monitor large-space separations. The overburden movement and deformation caused by coal mining are large in value and intense in deformation. The vertical separation space between adjacent rock and soil layers with large lithological differences may exceed 1 - 3 m. It is necessary to develop an overburden movement monitoring system suitable for large deformations caused by coal mining and develop corresponding software for separation discrimination and separation space data analysis.

[0048] At present, although the research and development of overburden movement and deformation monitoring equipment have been initially carried out, the overburden movement and deformation caused by coal mining are from the coal seam roof to the ground surface. The data acquisition ends of each monitoring point of the overburden movement monitoring equipment are also located at or near the orifice of the monitoring hole (due to the particularity of coal mining, the movement and deformation of the monitoring points in each monitoring equipment do not occur relative to the coal seam floor); however, the absolute movement and deformation of each monitoring point of the overburden movement and deformation are the relative comprehensive values of the overburden movement and deformation and the surface movement and deformation at the orifice. While monitoring the movement and deformation of deep rock and soil masses, it is necessary to monitor the absolute displacement of the orifice in real time, carry out high-precision calculation and analysis of the absolute movement and deformation data of the orifice + overburden, develop corresponding analysis software, and enrich the data post-processing work of the overburden movement and deformation monitoring system.

[0049] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments in the present invention belong to the scope of protection of the present invention.

[0050] The following combines Figures 1 to 11 to describe the integrated monitoring system for deep overburden and surface movement and deformation caused by coal mining in the present invention.

[0051] Figure 1 is a schematic diagram of the installation position of the anchor claws of the monitoring points in the integrated monitoring system for deep overburden and surface movement and deformation caused by coal mining provided by the present invention. Figure 2 is a schematic diagram of the GNSS monitoring sub-station of the monitoring points in the integrated monitoring system for deep overburden and surface movement and deformation caused by coal mining provided by the present invention, as shown in Figure 1 and Figure 2 shown. Among them, Figure 2 the monitoring equipment indicated in includes a plurality of wireline displacement sensors with parallel double steel spring pieces.

[0052] The integrated monitoring system for deep overlying strata and surface movement and deformation in coal mining provided by the present invention at least includes: a plurality of double-end three-claw hydraulic anchor claws, a plurality of wire displacement sensors with parallel double steel spring washers, GNSS monitoring equipment, and overlying strata separation numerical monitoring equipment;

[0053] The double-end three-claw hydraulic anchor claws and the wire displacement sensors with parallel double steel spring washers are used to collect overlying strata movement and deformation data;

[0054] The GNSS monitoring equipment is used to collect real-time surface movement and deformation data;

[0055] The GNSS monitoring equipment is also used to obtain the movement and deformation values of the internal monitoring points of the overlying strata based on the overlying strata movement and deformation data and the real-time surface movement and deformation data; the movement and deformation values of the internal monitoring points of the overlying strata are equal to the sum of the overlying strata movement and deformation data and the real-time surface movement and deformation data;

[0056] The GNSS monitoring equipment is also used to divide the overlying strata movement and deformation area into at least four zones: blue, yellow, orange, and red based on the movement and deformation values of the internal monitoring points of the overlying strata and give an alarm prompt;

[0057] The overlying strata separation numerical monitoring equipment is used to calculate the relative separation numerical value between two adjacent monitoring points inside the overlying strata. The expression for calculating the relative separation numerical value between two adjacent monitoring points inside the overlying strata is as follows:

[0058] W L =W i -W i-1 -H i-1→i ×K Ai

[0059] Wherein, W L represents the separation numerical value between two adjacent monitoring points, W i and W i-1 respectively represent the movement and deformation values of two adjacent internal monitoring points of the overlying strata, the thickness H i-1→i of the rock and soil layer between the two adjacent monitoring points = H i -H i-1 , H i and H i-1 respectively represent the installation depths of the double-end three-claw hydraulic anchor claws installed at the two adjacent monitoring points, and K Ai represents the rock dilation coefficient between two adjacent rock and soil layers corresponding to the two adjacent monitoring points.

[0060] Specifically, the monitoring system is installed together with the grouting drill pipe to the designed depth. The hydraulic oil pipe is cut off, and the double-end three-claw hydraulic anchor claws automatically open. At the same time, a special grouting pipe or grouting drill pipe is used to strengthen the anchoring of the monitoring points. On the one hand, it prevents the rock stratum water from flowing back into the goaf, and on the other hand, it secondarily anchors the anchoring force of the double-end three-claw hydraulic anchor claws to prevent the expansion of the mining gap from affecting the monitoring effect of the measuring points. Subsequently, a ground transmission line pole is set at the orifice ground, and a monitoring equipment fixing platform, a power supply device, a lightning protection device, a data acquisition and real-time transmission device, etc. are set at the top of the pole for real-time monitoring data acquisition and transmission of the deep overlying rock monitoring equipment.

[0061] Optionally, the double-end three-claw hydraulic anchor claw includes a three-claw anchor claw located at the top and opening upward, and a three-claw anchor claw located at the bottom and opening downward. The three-claw anchor claws are all connected by hydraulic pipes. A hydraulic oil cylinder is arranged inside the cylinder body of the double-end three-claw hydraulic anchor claw, and the oil valve of the hydraulic oil cylinder is a mechanical cam.

[0062] Specifically, Figure 3 is a schematic diagram of the anchor claw structure in the integrated monitoring system for deep overlying rock and surface movement and deformation in coal mining provided by the present invention, as Figure 3 shown. The existing anchor claw is a unidirectional single-end hydraulic anchor claw, as shown in Figure 3 (a) in. After the equipment is installed, cutting off the hydraulic pipe connecting the hydraulic anchor claw can control the automatic opening of the anchor claw.

[0063] The double-end three-claw hydraulic anchor claw provided by the present invention can eject a bidirectional double-end hydraulic anchor claw with stronger anchoring force, as shown in Figure 3 (b) in. After the equipment is installed, cutting off the hydraulic pipe connecting the hydraulic anchor claw can control the automatic opening of the anchor claw. Since there are three-claw bodies at both the upper and lower ends, the hydraulic anchor claw tightly grasps the hole wall of the monitoring hole and moves and deforms with the rock stratum up and down.

[0064] Optionally, the double-end three-claw hydraulic anchor claw controls the opening and contraction of the anchor claw through hydraulic pressure;

[0065] When the hydraulic oil cylinder is pressurized, the mechanical cam jacks up upward to control the contraction of the claw body of the anchor claw;

[0066] When the hydraulic oil cylinder is depressurized, the mechanical cam moves downward to control the opening of the claw body of the anchor claw.

[0067] Specifically, the existing hydraulic anchor claw (continue to refer to Figure 3In (a), after the ground is pressurized, the anchor claws remain in the open state, and it is necessary to manually compress the three claw bodies to the retracted state; during the installation of the construction site monitoring equipment, the hydraulic oil pipe is sometimes damaged, causing the anchor claws to open. Especially when the hydraulic anchor claws at some monitoring points have been set to a certain depth below the ground orifice, the opened claw bodies of the anchor claws cannot automatically retract after the hydraulic oil pipe is reconnected to the ground, affecting the further installation of the equipment.

[0068] The double-end three-claw hydraulic anchor claw provided by the present invention (continue to refer to (b) in Figure 3 includes a hydraulic oil pipe, and the hydraulic oil pipe is connected to the double-end three-claw hydraulic anchor claw; the hydraulic oil pipe is used to add hydraulic oil into the hydraulic oil pipe before the double-end three-claw hydraulic anchor claw is placed into the drilling hole, pressurize the claw body of the double-end three-claw hydraulic anchor claw, so that the three-claw bodies at the upper and lower ends contract; after the double-end three-claw hydraulic anchor claw is lowered to the preset depth of the drilling hole, the hydraulic oil pipe is cut off, so that the three-claw bodies at the upper and lower ends automatically spring open and contact the rock formation on the hole wall of the drilling hole.

[0069] Based on the three-claw one-way hydraulic anchor claw in the prior art, the embodiment of the present invention designs, improves and develops a new two-way double-end three-claw hydraulic anchor claw with automatic contraction and opening and strong anchoring force, improving the accuracy of real-time monitoring of overlying rock movement and deformation caused by coal mining.

[0070] Figure 4 is a schematic diagram of the mechanical cam controlling the contraction and opening of the anchor claw in the integrated monitoring system of deep overlying rock and surface movement and deformation caused by coal mining provided by the present invention, Figure 4 as shown. For the double-end three-claw hydraulic anchor claw provided by the present invention, a hydraulic oil cylinder is added inside the hydraulic anchor claw cylinder body, and the plunger after pressurization and depressurization pushes the coupling shaft to control the opening and contraction of the claw body, realizing the full automation of the opening and contraction of the hydraulic control anchor claw (changing the one-way oil valve to a mechanical cam control device, as Figure 4 shown).

[0071] In order to prevent the shear failure of the steel strand caused by the rock block due to severe overlying rock deformation, the embodiment of the present invention also connects the developed mechanical cam-controlled two-way double-end hydraulic anchor claw to the high-strength steel strand, and the periphery of the steel strand is protected by an armored conduit pipe and is protected by a PPR pipe for the conduit pipe. The diameter of the PPR material pipe is smaller than the diameter of the claw body of the double-end three-claw hydraulic anchor claw when it contracts.

[0072] Optionally, the pull wire displacement sensor with parallel double steel shrapnel includes at least two parallel steel shrapnel.

[0073] Specifically, under different mining intensities, pull wire displacement sensors with different traction forces can be used. Figure 5It is a schematic diagram of the wire displacement sensor of the expansion and parallel double springback device in the integrated monitoring system for deep overlying strata and surface movement and deformation in coal mining provided by the present invention, as Figure 5 shown. The traction force of the existing wire displacement sensor is 9N, and the steel spring piece is single-layer (as shown in (a) of Figure 5 ). Figure 6 It is a schematic diagram of the improvement of the variable diameter of the wire reel of the wire displacement sensor in the integrated monitoring system for deep overlying strata and surface movement and deformation in coal mining provided by the present invention, as Figure 6 shown. The wire displacement sensor with parallel double steel spring pieces provided by the present invention increases the thickness of the steel spring piece on the basis of the existing wire displacement sensor, that is, the expansion and parallel double springback device (the prototype of the single springback and double springback devices for trial production, see (b) of Figure 5 ); at the same time, the diameter of the wire reel is appropriately reduced to increase the traction force (according to the principle of equal torque, for the same restoring torque, the smaller the diameter, the greater the required traction force), making it suitable for the large traction force characteristics of coal mining. The improved wire reel is as Figure 6 shown. Figure 6 In [reference number], the traction force represented by F2 is the traction force after reducing the diameter of the wire reel, and the traction force represented by F1 is the traction force before reducing the diameter of the wire reel. F2 is greater than F1.

[0074] Optionally, each double-end three-claw hydraulic anchor claw is respectively installed at different depths in the deep overlying strata of coal mining;

[0075] Each double-end three-claw hydraulic anchor claw is respectively connected to each wire displacement sensor with parallel double steel spring pieces through a steel wire rope measuring line.

[0076] Specifically, for the installation positions of each double-end three-claw hydraulic anchor claw at different depths in the deep overlying strata of coal mining, reference can be made to Figure 1 . For the installation positions of each wire displacement sensor with parallel double steel spring pieces, reference can be made to Figure 2 .

[0077] Due to the low bonding force between the steel spring piece and the rock stratum and the low friction force against the movement and deformation of the overlying strata, the measured value of the movement and deformation of the overlying strata is often much smaller than the actual movement and deformation value. However, the double-end three-claw hydraulic anchor claw can still be in close contact with the overlying strata after the movement and deformation of the overlying strata. Therefore, in this embodiment, the double-end three-claw hydraulic anchor claw is used as the monitoring point for the movement and deformation of the deep overlying strata.

[0078] In this embodiment, in order to ensure the strength of the steel wire rope measuring line, a steel wire rope measuring line with a larger diameter is selected, and the diameter range is 1.2 to 2.0 mm, such as a diameter of 1.5 mm is selected. The range of the wire displacement sensor is determined according to the average mining thickness and mining depth of the working face. For example, when the average mining thickness of the working face is 9 m and the mining depth is 140 m, the range of the wire displacement sensor is determined to be 10 m.

[0079] In addition, the number of double-end three-claw hydraulic anchor claws, wire rope survey lines, and pull-wire displacement sensors with parallel double steel spring washers used in this embodiment is the same and they correspond one by one; each double-end three-claw hydraulic anchor claw is respectively arranged at different depths of the boreholes in the overlying strata affected by coal mining, and contacts the rock strata of the borehole wall under the elastic force of the double-end three-claw hydraulic anchor claw.

[0080] Design the depth and aperture of the surface boreholes according to the outer diameter size and hole slope requirements of the monitoring equipment placed in the boreholes, etc. For example, the opening aperture of the borehole is not less than Ф168mm, and the formed hole diameter is not less than Ф127mm. The borehole deviation slope is less than 0.02. Use a wireline drilling tool with a diameter of Ф127 to 146mm. Cement the well with concrete and drill naked in the soil section within about 10m, and it is required that there is no casing in the soil section.

[0081] After the drilling project is completed, use clean water or a circulating slurry with chemical reagents added to clean the boreholes to reduce the precipitation of rock powder in the holes and the resistance during the equipment installation process.

[0082] Multiple monitoring points are set in the deep overlying strata affected by coal mining, such as 8 to 16, and can be increased or decreased according to actual needs.

[0083] Each double-end three-claw hydraulic anchor claw is connected to a different wire rope survey line. The length of the wire rope survey line is determined according to the depth of each monitoring point. Each wire rope survey line is connected to a pull-wire displacement sensor with parallel double steel spring washers. One end of each wire rope survey line is connected to the double-end three-claw hydraulic anchor claw, and the other end is connected to the pull-wire displacement sensor with parallel double steel spring washers. The function of the wire rope survey line is to act as the survey line of the pull-wire displacement sensor with parallel double steel spring washers. The pull-wire displacement sensor with parallel double steel spring washers tightens the wire rope survey line, making the wire rope survey line in a vertical and taut state.

[0084] In the case where the rock strata of the borehole wall contacted by the double-end three-claw hydraulic anchor claw move and deform, the double-end three-claw hydraulic anchor claw moves and deforms synchronously with the movement and deformation of the rock strata of the borehole wall. The wire rope survey line connected to the double-end three-claw hydraulic anchor claw transmits the displacement of the double-end three-claw hydraulic anchor claw to the pull-wire displacement sensor with parallel double steel spring washers, and obtains the overlying strata movement and deformation data.

[0085] The measuring range of the pull-wire sensor with parallel double steel spring washers can be selected according to needs. In order to measure the displacement of the overlying strata with larger deformation, select a pull-wire sensor with parallel double steel spring washers with a larger measuring range.

[0086] In the embodiment provided by the present invention, by setting double-end three-claw hydraulic anchor claws at each monitoring point in the boreholes of the overlying strata in coal mining, the two ends of the wire rope measuring line are respectively connected to the double-end three-claw hydraulic anchor claws and the wire-pulling displacement sensor with parallel double steel elastic sheets, serving as the measuring line of the wire-pulling displacement sensor with parallel double steel elastic sheets. Since the double-end three-claw hydraulic anchor claws have strong anchoring force and good retractability, when the overlying strata move and deform, the double-end three-claw hydraulic anchor claws move and deform synchronously and always keep close contact with the overlying strata of the borehole wall. Thus, the wire-pulling displacement sensor with parallel double steel elastic sheets can accurately monitor the displacement of the overlying strata. Moreover, the wire-pulling displacement sensor with parallel double steel elastic sheets has a large measuring range and can be applicable to displacement monitoring with various severe deformations and large depths, having universality.

[0087] Figure 7 It is a schematic structural diagram of the internal pulley of the transmission line pole in the integrated monitoring system for deep overlying strata and surface movement and deformation in coal mining provided by the present invention, as Figure 7 shown. In this embodiment, it further includes a transmission line pole, and pulleys are added on one or more planes at a certain height on the inner wall of the transmission line pole. A set of pulleys is added on each plane, and the pulleys are fixed on the inner wall of the transmission line pole through brackets. As Figure 7 shown, four pulleys are evenly arranged on a certain plane of the inner wall of the transmission line pole. The wire rope measuring line is wound in the outer groove of the pulley to realize the displacement transmission and direction change of the wire rope measuring line and increase the stability of the end of the wire rope measuring line at the borehole opening.

[0088] On the basis of the above embodiment, it further includes a fixed platform, Figure 8 It is a schematic position diagram of the fixed platform on the transmission line pole in the integrated monitoring system for deep overlying strata and surface movement and deformation in coal mining provided by the present invention, as Figure 8 shown. Figure 8 The wire-pulling displacement sensor in is a wire-pulling displacement sensor with parallel double steel elastic sheets. The fixed platform includes multiple flat plates and flat plate fixed support columns. The wire-pulling displacement sensor with parallel double steel elastic sheets is fixed on the flat plates. A through hole is provided in the middle of each flat plate. The multiple flat plates are arranged in parallel along the axis direction of the transmission line pole, and adjacent two flat plates are fixedly connected by flat plate fixed support columns; the flat plates at both ends are fixed on the transmission line pole at a position higher than the pulleys, and the through holes of the flat plates are aligned with the through holes of the transmission line pole so that the wire rope measuring line passes through the transmission line pole and is connected to the wire-pulling displacement sensor with parallel double steel elastic sheets.

[0089] The fixed platform is located in the upper middle part of the transmission line pole and has two layers, which are formed by three flat plates placed in parallel. The flat plates are fixedly welded by steel bar segments. The thickness of the flat plate steel is relatively large, such as greater than 4 mm, to ensure the stability during the wire-pulling process of the wire-pulling displacement sensor with parallel double steel elastic sheets.

[0090] Each fixed platform is drilled using a numerically controlled machine tool according to the geometric dimensions of the wire displacement sensor with parallel double steel shrapnel, and then the wire displacement sensor with parallel double steel shrapnel is fixed on the fixed platform. The displacement sensors with parallel double steel shrapnel on the same layer are evenly arranged on the same flat plate.

[0091] In the embodiment of the present invention, a PPR material pipe with a certain diameter is additionally installed outside the armored conduits of several steel wire rope measuring lines to provide secondary protection for the steel wire rope measuring lines and the armored conduits, further ensuring the successful acquisition of displacement data under conditions of large measurement ranges and intense mining movements.

[0092] The total length of the PPR material pipe is equal to the distance between two adjacent double-end three-claw hydraulic anchor claws; the steel wire rope measuring lines of all double-end three-claw hydraulic anchor claws located between two adjacent double-end three-claw hydraulic anchor claws pass through the PPR material pipe located between two adjacent double-end three-claw hydraulic anchor claws, and each double-end three-claw hydraulic anchor claw is clamped between two adjacent sections of the PPR material pipe.

[0093] The PPR material pipe is also used to integrate all the steel wire rope measuring lines and the double-end three-claw hydraulic anchor claws together and fix the double-end three-claw hydraulic anchor claws, facilitating the lowering of the double-end three-claw hydraulic anchor claws and determining the lowering depth of the double-end three-claw hydraulic anchor claws, and ensuring the installation and monitoring success rate of the monitoring system.

[0094] The overburden movement and deformation data monitored by existing overburden movement and deformation monitoring devices (including the roof and floor deformation monitoring devices for underground monitoring) are all relative to the ground surface or the roof and floor of the coal seam, rather than the true movement values of the rock strata. Therefore, in order to monitor the true deformation values of the internal monitoring points of the overburden, a GNSS monitoring device is introduced in the embodiment of the present invention.

[0095] The GNSS monitoring device is used to collect real-time surface movement and deformation data.

[0096] The GNSS monitoring device is also used to obtain the movement and deformation values of the internal monitoring points of the overburden based on the overburden movement and deformation data and the real-time surface movement and deformation data; the movement and deformation values of the internal monitoring points of the overburden are equal to the sum of the overburden movement and deformation data and the real-time surface movement and deformation data.

[0097] By adding a GNSS monitoring device for real-time surface movement and deformation (including a GNSS monitoring reference station and a GNSS observation station in the overburden movement and deformation monitoring system, and the installation schematic diagram with the transmission line pole can be seen Figure 2 ), the single-base station method is used for monitoring, that is, a reference station is built in a stable area; the monitoring stations in the monitoring area are based on the reference station for high-precision static post-processing. For example, when the distance L between the position of the GNSS monitoring reference station and the working measurement point of the monitoring hole 01When L = 2 km, the accuracy of coordinate and deformation amount calculation for the monitoring stations in the monitoring area is: ±(2.5 mm + 0.5×10 -6 ×L 01 ) = ±(2.5 mm + 0.5×10 -6 ×2 km) = ±3.5 mm. Through static post - processing calculation, the operation accuracy at the kilometer level can be improved to the millimeter level.

[0098] Then, the displacement values of all monitoring points inside the overlying rock will be calculated to obtain their relative displacement and deformation values relative to the surface monitoring points. That is, the deformation value of the monitoring points inside the overlying rock is equal to the sum of the deformation data of the overlying rock movement deformation sensor and the deformation data of the GNSS observation station. That is to say, in order to monitor the true deformation value of the monitoring points inside the overlying rock, the relative displacement and deformation value relative to the surface monitoring points are calculated through the monitoring stations of the GNSS monitoring equipment in the monitoring area, and this is used as the deformation data of the GNSS observation station; the overlying rock movement deformation data is collected jointly by the double - end three - claw hydraulic anchor claw and the wire displacement sensor with parallel double - layer steel elastic sheets. The specific process can refer to the above - mentioned embodiment and will not be elaborated here; through the calculation system in the GNSS monitoring equipment, the deformation data of the overlying rock movement deformation sensor and the deformation data of the GNSS observation station are summed to obtain the deformation value of the monitoring points inside the overlying rock.

[0099] The GNSS monitoring equipment provided by the present invention has the Beidou high - precision positioning function. Beidou high - precision positioning measures the spatial transmission error between the satellite and the receiver by setting up a reference station, and then eliminates or weakens this part of the error during the calculation at the monitoring station, so as to obtain a higher relative positioning accuracy.

[0100] Specifically, based on the deformation monitoring technology of the Beidou / GNSS satellite system, the basic principle also adopts the relative measurement technology. A GNSS reference station with high stability is fixed near the deformation point, and the satellite ranging signals at the reference station and the monitoring point are collected simultaneously. Using the relative positioning principle, the relative displacement change of the monitoring point relative to the reference station is calculated to achieve the purpose of observing the effective displacement change amount of the monitoring point. Its data processing methods can be divided into dynamic real - time calculation (accuracy from centimeter level to sub - centimeter level) and static post - processing calculation (accuracy from millimeter level to sub - millimeter level).

[0101] In the embodiment of the present invention, by integrating the deep overlying rock movement deformation monitoring equipment with the orifice GNSS real - time monitoring system, the real - time monitoring of the absolute movement deformation of the deformation value of the monitoring points inside the overlying rock is realized, that is, the true movement amount value of the rock formation is monitored in real time.

[0102] Therefore, compared with the overburden movement and deformation data monitored by existing overburden movement and deformation monitoring devices (including the roof and floor deformation monitoring devices for underground monitoring), the deformation values of the internal monitoring points of the overburden obtained by monitoring and calculating through the GNSS monitoring device in the present invention have higher accuracy.

[0103] The GNSS monitoring device is also used to divide the overburden movement and deformation area into at least four zones of blue, yellow, orange, and red based on the movement and deformation values of the internal monitoring points of the overburden and give an alarm prompt.

[0104] In the embodiment of the present invention, in combination with the real-time data transmitted by the deep overburden movement and deformation monitoring device, based on the monitoring purpose, different movement and deformation levels at different depths and different intensities in the overburden are set, and warning levels are set for different movement and deformation levels: a total of four warning levels of blue, yellow, orange, and red (under other conditions, more detailed zones can also be set according to the actual situation, and this embodiment does not limit this).

[0105] When setting the warning level, the following factors can also be considered and reasonably set on the man-machine interface: the geological mining conditions of each coal mine (especially the coal mining thickness and coal mining method), the geological occurrence conditions of the open-pit mine slope and other bad geological bodies are different. For different geological mining conditions, the input setting of the overlying rock and soil layer movement and deformation values corresponding to different movement and deformation levels is increased, so as to realize the setting of different warning level values on the man-machine interface.

[0106] The blue zone corresponds to the conventional monitoring area of movement and deformation (the area with subsidence less than 10 mm), the yellow zone corresponds to the movement and deformation prevention area (within the range from the 10 mm subsidence line to the horizontal deformation of 2 mm / m), the orange zone corresponds to the movement and deformation warning area (80% of the movement and deformation control value under the corresponding building category conditions, and this area range is the key monitoring area; within the range from the horizontal deformation of 2 mm / m to the crack angle influence area), and the red zone corresponds to the movement and deformation emergency treatment measure area (90% of the movement and deformation control value under the corresponding building category conditions, and this area range is the key and encrypted monitoring area, and the reasons should be analyzed and corresponding deformation control or ground building treatment measures should be formulated; within the crack angle influence area). When the deformation value reaches a certain level, an alarm prompt is given on the client software surface or at the top of the transmission line pole (acoustic and optical devices).

[0107] In the integrated monitoring system for deep overlying strata and surface movement and deformation in coal mining provided by the present invention, a numerical monitoring device for separated strata in overlying strata is also introduced, which is used to calculate the relative separated strata numerical value between two adjacent monitoring points inside the overlying strata. As the coal mining work progresses, the immediate roof and the main roof often deform. Before the immediate roof collapses, there is a maximum deflection for both the immediate roof and the main roof. If the maximum deflection of the immediate roof is greater than that of the main roof, separation will occur, that is, the immediate roof and the main roof will separate from each other, resulting in a separated strata space. In order to accurately monitor the size value of this separated strata space, a numerical monitoring device for separated strata in overlying strata is used, and an expression for calculating the relative separated strata numerical value between two adjacent monitoring points inside the overlying strata is defined in the numerical monitoring device for separated strata in overlying strata.

[0108] The numerical monitoring device for separated strata in overlying strata is used to calculate the relative separated strata numerical value between two adjacent monitoring points inside the overlying strata. The expression for calculating the relative separated strata numerical value between two adjacent monitoring points inside the overlying strata is as follows:

[0109] W L =W i -W i-1 -H i-1→i ×K Ai

[0110] Wherein, W L represents the separated strata numerical value between two adjacent monitoring points, W i and W i-1 respectively represent the movement and deformation values of two adjacent monitoring points inside the overlying strata. The thickness H i-1→i of the rock and soil layer between two adjacent monitoring points = H i -H i-1 , H i and H i-1 respectively represent the installation depths of the double-end three-claw hydraulic anchor claws installed at two adjacent monitoring points. K Ai represents the coefficient of rock dilation between two adjacent rock and soil layers corresponding to two adjacent monitoring points.

[0111] Based on the movement and deformation data (W i and W i-1 ) of each monitoring point inside the overlying strata, according to the coefficient of rock dilation K Ai between adjacent rock and soil layers, the installation depths (H i and H i-1 ) of adjacent monitoring points, and the thickness H i-1→i of the rock and soil layer between adjacent monitoring points (H i-1→i = H i -H i-1 ), the calculation formula W L = W i -Wi-1 -H i-1→i ×K Ai , scientifically monitoring the relative separation values between various points in the overlying strata after coal mining can provide data support for the utilization of the subsidence area and roof control.

[0112] The improved equipment, improved supporting devices, deformation algorithm analysis, mobile deformation value control setting and early warning zoning, overlying strata separation data analysis, and other auxiliary supporting devices, under the guidance of scientific installation technology, jointly constitute the integrated monitoring system for deep overlying strata and surface movement and deformation during coal mining of the present invention.

[0113] An integrated monitoring system for deep overlying strata and surface movement and deformation during coal mining provided by the present invention collects overlying strata movement and deformation data through the improved double-end three-claw hydraulic anchor claw and the wire displacement sensor with parallel double steel spring pieces, improving the accuracy of real-time monitoring of overlying strata movement and deformation caused by coal mining; collects real-time surface movement and deformation data through GNSS monitoring equipment and calculates the movement and deformation values of the internal monitoring points of the overlying strata, integrates the deep overlying strata movement and deformation monitoring equipment with the orifice GNSS real-time monitoring system, realizes the real-time monitoring of the absolute movement and deformation of the deformation values of the internal monitoring points of the overlying strata, obtains the true movement values of the rock strata, and divides the overlying strata movement and deformation area based on the movement and deformation values of the internal monitoring points of the overlying strata and gives different-level alarm prompts, improving the safety and reliability of the coal mining process; through the overlying strata separation value monitoring equipment and defining an expression for calculating the relative separation value between two adjacent monitoring points inside the overlying strata, realizes the accurate monitoring of the relative separation values between various points in the overlying strata after coal mining, and further provides reliable data support for the utilization of the subsidence area and roof control.

[0114] The following describes an integrated monitoring method for deep overlying strata and surface movement and deformation during coal mining provided by the present invention. The integrated monitoring method for deep overlying strata and surface movement and deformation during coal mining described below can be mutually referred to with the integrated monitoring system for deep overlying strata and surface movement and deformation during coal mining described above.

[0115] Figure 9 is a schematic flow chart of the integrated monitoring method for deep overlying strata and surface movement and deformation during coal mining provided by the present invention, as Figure 9 shown. An integrated monitoring method for deep overlying strata and surface movement and deformation during coal mining provided by the present invention includes the following steps:

[0116] Step 901: Determine the movement and deformation values of the internal monitoring points in the overlying strata and the installation depths of the double-end three-claw hydraulic anchor claws installed at two adjacent monitoring points; the movement and deformation values of the internal monitoring points in the overlying strata are obtained by summing the overlying strata movement and deformation data and the real-time surface movement and deformation data by the GNSS monitoring device; the overlying strata movement and deformation data are jointly collected by a plurality of the double-end three-claw hydraulic anchor claws and the wire displacement sensors with a plurality of parallel double steel spring pieces; the real-time surface movement and deformation data are collected by the GNSS monitoring device.

[0117] Step 902: Calculate the relative separation value between two adjacent monitoring points in the overlying strata based on the movement and deformation values of the internal monitoring points in the overlying strata and the installation depths of the double-end three-claw hydraulic anchor claws installed at two adjacent monitoring points; the expression for calculating the relative separation value between two adjacent monitoring points in the overlying strata is as follows:

[0118] W L =W i -W i-1 -H i-1→i ×K Ai

[0119] Wherein, W L represents the separation value between two adjacent monitoring points, W i and W i-1 respectively represent the movement and deformation values of two adjacent internal monitoring points in the overlying strata, the thickness H i-1→i =H i -H i-1 of the rock and soil layer between the two adjacent monitoring points, H i and H i-1 respectively represent the installation depths of the double-end three-claw hydraulic anchor claws installed at the two adjacent monitoring points, and K Ai represents the rock dilation coefficient between two adjacent rock and soil layers corresponding to the two adjacent monitoring points.

[0120] An integrated monitoring method for deep overlying strata and surface movement and deformation caused by coal mining provided by the present invention uses an improved double-ended three-claw hydraulic anchor claw and a wire displacement sensor with parallel double steel shrapnel to jointly collect overlying strata movement and deformation data, improving the accuracy of real-time monitoring of overlying strata movement and deformation caused by coal mining; GNSS monitoring equipment is used to collect real-time surface movement and deformation data and calculate the movement and deformation values of the internal monitoring points of the overlying strata. The deep overlying strata movement and deformation monitoring equipment is integrated with the orifice GNSS real-time monitoring system to achieve real-time monitoring of the absolute movement and deformation of the deformation values of the internal monitoring points of the overlying strata, obtain the true movement values of the rock strata, and based on the movement and deformation values of the internal monitoring points of the overlying strata, the overlying strata movement and deformation area is partitioned and different levels of alarm prompts are given, improving the safety and reliability of the coal mining process; through the overlying strata separation numerical monitoring equipment, and defining an expression for calculating the relative separation numerical value between two adjacent monitoring points inside the overlying strata, accurate monitoring of the relative separation numerical value between each point inside the overlying strata after coal mining is achieved, and thus reliable data support is provided for the utilization of the subsidence area and roof control.

[0121] The following describes an integrated monitoring device for deep overlying strata and surface movement and deformation caused by coal mining provided by the present invention. The integrated monitoring device for deep overlying strata and surface movement and deformation described below can be mutually corresponding and referred to with the integrated monitoring method for deep overlying strata and surface movement and deformation described above.

[0122] Figure 10 is a structural schematic diagram of the integrated monitoring device for deep overlying strata and surface movement and deformation caused by coal mining provided by the present invention, as Figure 10 shown. An integrated monitoring device for deep overlying strata and surface movement and deformation provided by an embodiment of the present invention includes a determination module 1001 and a calculation module 1002, wherein:

[0123] The determination module 1001 is used to determine the movement and deformation values of the internal monitoring points of the overlying strata and the installation depths of the double-ended three-claw hydraulic anchor claws installed at two adjacent monitoring points; the movement and deformation values of the internal monitoring points of the overlying strata are obtained by summing the overlying strata movement and deformation data and the real-time surface movement and deformation data by the GNSS monitoring equipment; the overlying strata movement and deformation data is jointly collected by a plurality of the double-ended three-claw hydraulic anchor claws and a plurality of wire displacement sensors with parallel double steel shrapnel; the real-time surface movement and deformation data is collected by the GNSS monitoring equipment; the calculation module 1002 is used to calculate the relative separation numerical value between two adjacent monitoring points inside the overlying strata based on the movement and deformation values of the internal monitoring points of the overlying strata and the installation depths of the double-ended three-claw hydraulic anchor claws installed at two adjacent monitoring points; the expression for calculating the relative separation numerical value between two adjacent monitoring points inside the overlying strata is as follows:

[0124] W L =W i -W i-1 -H i-1→i ×K Ai

[0125] Wherein, W L represents the separation layer value between two adjacent monitoring points, W i and W i-1 respectively represent the moving and deforming quantity values of two adjacent internal overburden monitoring points, and the thickness H of the rock and soil layer between the two adjacent monitoring points i-1→i =H i -H i-1 , H i and H i-1 respectively represent the installation depths of the double-ended three-claw hydraulic anchor claws installed at the two adjacent monitoring points, and K Ai represents the coefficient of rock dilatancy between two adjacent rock and soil layers corresponding to the two adjacent monitoring points.

[0126] An integrated monitoring device for deep overburden and surface movement and deformation in coal mining provided by the present invention, through an improved double-ended three-claw hydraulic anchor claw and a wire displacement sensor with parallel double steel shrapnel, jointly collects overburden movement and deformation data, improving the accuracy of real-time monitoring of overburden movement and deformation caused by coal mining; through GNSS monitoring equipment, it collects real-time surface movement and deformation data and calculates the movement and deformation quantity values of internal overburden monitoring points, integrating the deep overburden movement and deformation monitoring equipment with the orifice GNSS real-time monitoring system, realizing real-time monitoring of the absolute movement and deformation of the deformation quantity values of internal overburden monitoring points, obtaining the true movement quantity values of the rock strata, and based on the movement and deformation quantity values of internal overburden monitoring points, partitioning the overburden movement and deformation area and giving different levels of alarm prompts, improving the safety and reliability of the coal mining process; through overburden separation layer value monitoring equipment, and defining an expression for calculating the relative separation layer value between two adjacent monitoring points inside the overburden, realizing accurate monitoring of the relative separation layer value between each point inside the overburden after coal mining, and further providing reliable data support for the utilization of the subsidence area and roof control.

[0127] Figure 11 Illustrates a schematic diagram of the physical structure of an electronic device, such as Figure 11As shown in the figure, the electronic device may include: a processor 1110, a communications interface 1120, a memory 1130, and a communication bus 1140. Among them, the processor 1110, the communications interface 1120, and the memory 1130 communicate with each other through the communication bus 1140. The processor 1110 may call logical instructions in the memory 1130 to execute an integrated monitoring method for deep overlying strata and surface movement and deformation during coal mining. The method includes:

[0128] Determine the amount of movement and deformation of the monitoring points inside the overlying strata and the installation depths of the double-ended three-claw hydraulic anchor claws installed at two adjacent monitoring points; the amount of movement and deformation of the monitoring points inside the overlying strata is obtained by summing the overlying strata movement and deformation data and the surface real-time movement and deformation data by the GNSS monitoring device; the overlying strata movement and deformation data is jointly collected by a plurality of the double-ended three-claw hydraulic anchor claws and a wire displacement sensor with a plurality of parallel double steel spring pieces; the surface real-time movement and deformation data is collected by the GNSS monitoring device;

[0129] Based on the amount of movement and deformation of the monitoring points inside the overlying strata and the installation depths of the double-ended three-claw hydraulic anchor claws installed at two adjacent monitoring points, calculate the relative separation value between two adjacent monitoring points inside the overlying strata; the expression for calculating the relative separation value between two adjacent monitoring points inside the overlying strata is as follows:

[0130] W L =W i -W i-1 -H i-1→i ×K Ai

[0131] Wherein, W L represents the separation value between two adjacent monitoring points, W i and W i-1 respectively represent the amounts of movement and deformation of two adjacent monitoring points inside the overlying strata, the thickness H of the rock and soil layer between the two adjacent monitoring points i-1→i =H i -H i-1 ,H i and H i-1 respectively represent the installation depths of the double-ended three-claw hydraulic anchor claws installed at the two adjacent monitoring points, and K Ai represents the rock swelling coefficient between two adjacent rock and soil layers corresponding to the two adjacent monitoring points.

[0132] In addition, when the logical instructions in the above-mentioned memory 1130 are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), magnetic disks, or optical discs that can store program codes.

[0133] On the other hand, the present invention also provides a computer program product. The computer program product includes a computer program. The computer program can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the integrated monitoring method for deep overlying strata and surface movement and deformation in coal mining provided by the above-mentioned various methods. The method includes:

[0134] Determine the movement and deformation values of the monitoring points inside the overlying strata and the installation depths of the double-ended three-claw hydraulic anchor claws installed at two adjacent monitoring points; the movement and deformation values of the monitoring points inside the overlying strata are obtained by summing the overlying strata movement and deformation data and the real-time surface movement and deformation data by the GNSS monitoring device; the overlying strata movement and deformation data are jointly collected by multiple double-ended three-claw hydraulic anchor claws and multiple wire displacement sensors with parallel double steel spring plates; the real-time surface movement and deformation data are collected by the GNSS monitoring device;

[0135] Based on the movement and deformation values of the monitoring points inside the overlying strata and the installation depths of the double-ended three-claw hydraulic anchor claws installed at two adjacent monitoring points, calculate the relative separation value between two adjacent monitoring points inside the overlying strata; the expression for calculating the relative separation value between two adjacent monitoring points inside the overlying strata is as follows:

[0136] W L =W i -W i-1 -H i-1→i ×K Ai

[0137] Wherein, W L represents the separation value between two adjacent monitoring points, W i and W i-1respectively represent the displacement and deformation values of two adjacent internal overburden monitoring points, and the thickness H of the rock and soil layer between the two adjacent monitoring points i-1→i =H i -H i-1 ,H i and H i-1 respectively represent the installation depths of the double-end three-claw hydraulic anchor claws installed at the two adjacent monitoring points, and K Ai represents the rock dilation coefficient between two adjacent rock and soil layers corresponding to the two adjacent monitoring points.

[0138] On the other hand, the present invention also provides a non-transitory computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, it realizes the integrated monitoring method for deep overburden and surface movement and deformation in coal mining provided by the above-mentioned various methods. The method includes:

[0139] Determine the displacement and deformation values of the internal overburden monitoring points and the installation depths of the double-end three-claw hydraulic anchor claws installed at two adjacent monitoring points; the displacement and deformation values of the internal overburden monitoring points are obtained by summing the overburden movement and deformation data and the real-time surface movement and deformation data by the GNSS monitoring device; the overburden movement and deformation data are jointly collected by a plurality of the double-end three-claw hydraulic anchor claws and a plurality of wire displacement sensors with parallel double steel spring pieces; the real-time surface movement and deformation data are collected by the GNSS monitoring device;

[0140] Based on the displacement and deformation values of the internal overburden monitoring points and the installation depths of the double-end three-claw hydraulic anchor claws installed at two adjacent monitoring points, calculate the relative separation value between two adjacent internal overburden monitoring points; the expression for calculating the relative separation value between two adjacent internal overburden monitoring points is as follows:

[0141] W L =W i -W i-1 -H i-1→i ×K Ai

[0142] wherein, W L represents the separation value between two adjacent monitoring points, W i and W i-1 respectively represent the displacement and deformation values of two adjacent internal overburden monitoring points, and the thickness H of the rock and soil layer between the two adjacent monitoring points i-1→i =H i -H i-1 ,H i and H i-1 respectively represent the installation depths of the double-end three-claw hydraulic anchor claws installed at the two adjacent monitoring points, and KAi represents the coefficient of rock dilation between two adjacent rock and soil layers corresponding to the two adjacent monitoring points.

[0143] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. A person of ordinary skill in the art can understand and implement it without creative labor.

[0144] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product, which can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., including several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0145] It should be noted that in this article, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including that element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in a reverse order according to the functions involved. For example, the methods described can be performed in an order different from that described, and various steps can also be added, omitted, or combined. In addition, the features described with reference to certain examples can be combined in other examples.

[0146] "Determining B based on A" in the embodiments of this application means that the factor A should be considered when determining B. It is not limited to "determining B only based on A", but also includes: "determining B based on A and C", "determining B based on A, C, and E", "determining C based on A and further determining B based on C", etc. Additionally, it can also include using A as a condition for determining B. For example, "when A meets the first condition, use the first method to determine B"; another example, "when A meets the second condition, determine B"; and another example, "when A meets the third condition, determine B based on the first parameter", etc. Of course, it can also be that A is used as a condition for the factor of determining B. For example, "when A meets the first condition, use the first method to determine C and further determine B based on C", etc.

[0147] The term "a plurality of" in the present invention means two or more, and other quantifiers are similar thereto.

[0148] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An integrated monitoring system for deep overlying strata and surface movement and deformation in coal mining, characterized in that, Comprising: Multiple double - ended three - claw hydraulic anchor claws, multiple wire - drawing displacement sensors with parallel double - layer steel spring pieces, GNSS monitoring equipment, and overburden separation numerical monitoring equipment; The double - ended three - claw hydraulic anchor claws and the wire - drawing displacement sensors with parallel double - layer steel spring pieces are used to collect overburden movement and deformation data; The GNSS monitoring equipment is used to collect real - time surface movement and deformation data; The GNSS monitoring equipment is also used to obtain the movement and deformation values of the internal monitoring points of the overburden based on the overburden movement and deformation data and the real - time surface movement and deformation data; the movement and deformation values of the internal monitoring points of the overburden are equal to the sum of the overburden movement and deformation data and the real - time surface movement and deformation data; The GNSS monitoring equipment is also used to divide the overburden movement and deformation area into at least four zones: blue, yellow, orange, and red based on the movement and deformation values of the internal monitoring points of the overburden and give alarm prompts; The overburden separation numerical monitoring equipment is used to calculate the relative separation value between two adjacent monitoring points inside the overburden. The expression for calculating the relative separation value between two adjacent monitoring points inside the overburden is as follows: W L = W i - W i-1 - H i-1→i × K Ai Among them, W L represents the separation value between two adjacent monitoring points. W i and W i-1 respectively represent the moving deformation values of two adjacent internal overburden monitoring points. The thickness H i-1→i of the rock and soil layer between the two adjacent monitoring points is equal to H i minus H i-1 . H i and H i-1 respectively represent the installation depths of the double-end three-claw hydraulic anchor claws installed at the two adjacent monitoring points. K Ai represents the coefficient of rock dilation between two adjacent rock and soil layers corresponding to the two adjacent monitoring points.

2. The integrated monitoring system for deep overlying strata and surface movement and deformation caused by coal mining according to claim 1, characterized in that, The double - ended three - claw hydraulic anchor claw includes a three - claw anchor claw located at the top and opening upward, and a three - claw anchor claw located at the bottom and opening downward. The three - claw anchor claws are all connected by hydraulic pipes. Inside the cylinder body of the double - ended three - claw hydraulic anchor claw, there is a hydraulic cylinder, and the oil valve of the hydraulic cylinder is a mechanical cam.

3. The integrated monitoring system for deep overlying strata and surface movement and deformation caused by coal mining according to claim 2, characterized in that The double - ended three - claw hydraulic anchor claw controls the opening and contraction of the anchor claw through hydraulic pressure; When pressurizing the hydraulic cylinder, the mechanical cam jacks up upward to control the contraction of the claw body of the anchor claw; When depressurizing the hydraulic cylinder, the mechanical cam moves downward to control the opening of the claw body of the anchor claw.

4. The integrated monitoring system for deep overburden and surface movement and deformation caused by coal mining as claimed in claim 1, wherein The wire - drawing displacement sensor with parallel double - layer steel spring pieces includes at least two parallel steel spring pieces.

5. The integrated monitoring system for deep overlying strata and surface movement and deformation caused by coal mining according to claim 1, wherein Each double - ended three - claw hydraulic anchor claw is installed at different depths in the deep overburden of coal mining; Each double - ended three - claw hydraulic anchor claw is connected to each wire - drawing displacement sensor with parallel double - layer steel spring pieces through a wire rope measuring line.

6. An integrated monitoring method for deep overlying strata and surface movement and deformation in coal mining, based on the integrated monitoring system for deep overlying strata and surface movement and deformation in coal mining according to any one of claims 1 to 5, characterized in that, Comprising: Determining the movement and deformation values of the internal monitoring points of the overburden and the installation depths of the double - ended three - claw hydraulic anchor claws installed at two adjacent monitoring points; the movement and deformation values of the internal monitoring points of the overburden are obtained by the GNSS monitoring equipment through summing the overburden movement and deformation data and the real - time surface movement and deformation data; the overburden movement and deformation data are jointly collected by multiple double - ended three - claw hydraulic anchor claws and multiple wire - drawing displacement sensors with parallel double - layer steel spring pieces; the real - time surface movement and deformation data are collected by the GNSS monitoring equipment; Based on the movement and deformation values of the internal monitoring points of the overburden and the installation depths of the double - ended three - claw hydraulic anchor claws installed at two adjacent monitoring points, calculating the relative separation value between two adjacent monitoring points inside the overburden. The expression for calculating the relative separation value between two adjacent monitoring points inside the overburden is as follows: W L = W i - W i-1 - H i-1→i × K Ai Among them, W L represents the separation value between two adjacent monitoring points. W i and W i-1 respectively represent the moving deformation values of two adjacent internal overburden monitoring points. The thickness H i-1→i of the rock and soil layer between the two adjacent monitoring points is H i - H i-1 , where H i and H i-1 respectively represent the installation depths of the double - end three - claw hydraulic anchor claws installed at the two adjacent monitoring points. K Ai represents the coefficient of rock dilation between two adjacent rock and soil layers corresponding to the two adjacent monitoring points.

7. An integrated monitoring device for deep overlying strata and surface movement and deformation in coal mining, which is used to implement the integrated monitoring method for deep overlying strata and surface movement and deformation in coal mining described in claim 6, and is characterized in that, Comprising: A determination module, configured to determine the movement and deformation values of the internal monitoring points in the overlying strata and the installation depths of the double-end three-claw hydraulic anchor claws installed at two adjacent monitoring points; the movement and deformation values of the internal monitoring points in the overlying strata are obtained by summing the overlying strata movement and deformation data and the real-time surface movement and deformation data by the GNSS monitoring device; the overlying strata movement and deformation data are jointly collected by a plurality of the double-end three-claw hydraulic anchor claws and a wire displacement sensor with a plurality of parallel double steel leaf springs; the real-time surface movement and deformation data are collected by the GNSS monitoring device; A calculation module, configured to calculate the relative separation value between two adjacent monitoring points inside the overlying strata based on the movement and deformation values of the internal monitoring points in the overlying strata and the installation depths of the double-end three-claw hydraulic anchor claws installed at two adjacent monitoring points; the expression for calculating the relative separation value between two adjacent monitoring points inside the overlying strata is as follows: W L = W i - W i-1 - H i-1→i × K Ai Among them, W L represents the separation value between two adjacent monitoring points, W i and W i-1 respectively represent the displacement and deformation values of two adjacent internal overburden monitoring points. The thickness H i-1→i of the rock and soil layer between the two adjacent monitoring points is i = H i-1 - H i and H i-1 respectively represent the installation depths of the double-end three-claw hydraulic anchor claws installed at the two adjacent monitoring points. K Ai represents the coefficient of rock dilation between two adjacent rock and soil layers corresponding to the two adjacent monitoring points.

8. An electronic device, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the integrated monitoring method for deep mining-induced overlying strata and surface movement and deformation in a coal mine as described in claim 6.

9. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the integrated monitoring method for deep mining-induced overlying strata and surface movement and deformation in a coal mine as described in claim 6.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by the processor, it implements the integrated monitoring method for deep mining-induced overlying strata and surface movement and deformation in a coal mine as described in claim 6.

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