Arrangement structure facilitating accurate monitoring of surrounding rock displacement

Abstract

The utility model discloses an arrangement structure facilitating accurate monitoring of surrounding rock displacement, and belongs to the technical field of coal mine safety. Comprising a top plate separation layer detector and a top plate separation layer displacement sensor which are used for monitoring the displacement of a top plate in a roadway, and a multi-light-source laser range finder and a positioning plate which are used for assisting in monitoring the displacement of roadway sides on two sides and the displacement of a bottom plate in the roadway; the roof separation detector is arranged at the top of the roadway; the plurality of roof separation displacement sensors are uniformly distributed right above the roof separation detector at intervals; one side of the roadway is vertically connected with the multi-light-source laser range finder, the other side of the roadway is vertically connected with the positioning plate, the multi-light-source laser range finder corresponds to the position of the positioning plate in the horizontal direction, and laser emitted by the multi-light-source laser range finder vertically irradiates the positioning plate. According to the utility model, the monitoring arrangement structure is simple, the roof separation amount, the two-side roadway side displacement amount and the floor heave amount in the roadway can be respectively obtained through monitoring data and calculating difference values, and the monitoring accuracy and precision are improved.

Description

Technical Field

[0001] The utility model relates to an arrangement structure for monitoring surrounding rock displacement, in particular to an arrangement structure which is convenient for accurate monitoring of surrounding rock displacement and belongs to the technical field of coal mine safety. Background Art

[0002] As the mining depth goes deeper, the control of tunnel surrounding rock faces a more severe test. Under the conditions of working face advancement or tunnel excavation, the stress of tunnel surrounding rock is disturbed and there is a serious deformation of tunnel surrounding rock, which is easy to cause roof accidents and cannot meet the requirements of safe and efficient production. Therefore, it is necessary to monitor and warn the deformation of tunnel surrounding rock, which is conducive to timely maintenance of tunnel and prevention of roof collapse accidents.

[0003] At present, the existing monitoring and early warning schemes often use manual monitoring or the arrangement of monitoring equipment to measure and calculate the relevant parameters in the tunnel, but manual monitoring not only has the problem of high difficulty and large monitoring tasks, but also has the problem of large manual calculation errors and low accuracy. For example, the method of arranging monitoring equipment is a coal mine tunnel deformation dynamic monitoring system and monitoring method with application publication number CN116379874A, in which an arc frame is arranged along the top plate of the tunnel surrounding rock, a sliding channel is arranged in the arc frame, the sliding channel is slidably connected to the mobile base, a first detection component and a second detection component are arranged on the mobile base, and a number of monitoring anchor columns are arranged equidistantly along the circumference of the arc frame, and the displacement of the monitoring anchor columns extending into the arc frame is used to analyze the deformation; however, there are many monitoring points that need to be arranged in this monitoring system, and the arc frame device used for monitoring has a complex structure and is difficult to install, and the arc frame has a high requirement for the arc accuracy of production. Therefore, the complex device structure increases the error of the monitoring result, which is not conducive to rapid and accurate monitoring.

[0004] Therefore, it is urgent to design a surrounding rock displacement monitoring arrangement structure with simple structural layout, convenient installation and rapid monitoring. Utility Model Content

[0005] The purpose of the utility model is to overcome the problems of complex layout structure, great installation difficulty and error in monitoring results in the existing displacement monitoring system, and to provide a layout structure that is convenient for accurate monitoring of surrounding rock displacement. It only needs to set up a multi-light source laser rangefinder, a positioning plate, a roof separation detector and a roof separation displacement sensor in the tunnel, so that the roof separation amount, the displacement amount of the sidewalls and the bottom plate bulge in the tunnel can be obtained respectively through monitoring data and calculating the difference. The monitoring layout structure is simple, there is no error interference, and the monitoring accuracy and precision are high.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions: an arrangement structure that facilitates accurate monitoring of surrounding rock displacement, including a roof separation detector and a roof separation displacement sensor for monitoring the displacement of the roof in the tunnel, and a multi-light source laser rangefinder and a positioning plate for assisting in monitoring the displacement of the sidewalls and the bottom plate on both sides of the tunnel;

[0007] The roof separation detector is arranged at the top of the tunnel, and a plurality of roof separation displacement sensors are arranged and evenly distributed just above the roof separation detector; one gang of the tunnel is vertically connected to a multi-light source laser rangefinder, and the other gang is vertically connected to a positioning plate, and the multi-light source laser rangefinder corresponds to the positioning plate in the horizontal direction, and the laser emitted by the multi-light source laser rangefinder is vertically irradiated on the positioning plate;

[0008] The installation distance between the multi-light source laser rangefinder and the laneway side is defined as a 1 The installation distance between the positioning plate and the side of the laneway is defined as a 2 The installation distance between the bottom of the roof separation detector and the top of the roadway is defined as b 1 ; where a 1 、a 2 、a 3 The measured values ​​are all less than 300mm.

[0009] Furthermore, the roof separation detector and multiple roof separation displacement sensors are all located on the vertical symmetric center line of the tunnel.

[0010] Furthermore, the left side displacement ΔX of the lane 1 Determined by the displacement between the outer side of the multi-light source laser rangefinder and the vertical symmetric center line of the tunnel; the right side displacement ΔX of the tunnel 2 It is determined by subtracting the left side displacement from the distance between the multi-light source laser rangefinder and the positioning plate after displacement.

[0011] Furthermore, the positions of the multiple roof separation displacement sensors located above the roof separation detector are set to A from bottom to top. 1 , A 2 , A 3 .

[0012] Furthermore, the roof separation amount ΔA of the tunnel is respectively obtained by separating the layer components ΔA of a plurality of roof separation displacement sensors. 1 , ΔA 2 and ΔA 3 The bottom bulge ΔW of the tunnel is determined by subtracting the roof separation ΔA from the displacement between the roof separation detector and the bottom plate.

[0013] Furthermore, the model of the multi-light source laser rangefinder is the mining intrinsically safe type YHJ200J.

[0014] Furthermore, the roof separation detector is a mining intrinsically safe three-point GWL150.

[0015] The beneficial effects of the utility model are:

[0016] 1) The monitoring layout structure of the utility model is simple. It only needs to set up a multi-light source laser rangefinder, a positioning plate, a roof separation detector and a roof separation displacement sensor in the tunnel, which solves the problems existing in the existing monitoring layout structure, such as the large number of monitoring sensors, complex installation, high failure rate, high cost, and easy interference in the harsh underground environment, resulting in inaccurate monitoring results.

[0017] 2) In the layout structure of the utility model, the roof separation detector and the roof separation displacement sensor can directly monitor the data and calculate the difference before and after the displacement to obtain the roof displacement; the multi-light source laser rangefinder and the positioning plate can assist in monitoring the data and calculate the difference before and after the displacement to obtain the displacement of the sidewalls and the bottom bulge of the bottom plate. The monitoring data directly monitored by the multi-light source laser rangefinder and the roof separation detector is more accurate, thereby improving the monitoring accuracy and precision. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the arrangement structure of the utility model.

[0019] In the figure, 1-multi-light source laser rangefinder, 2-roof separation detector, 3-positioning plate, 4-roof separation displacement sensor, 5-tunnel. DETAILED DESCRIPTION

[0020] The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments.

[0021] Example: Figure 1 As shown, the utility model provides an arrangement structure that is convenient for accurately monitoring the displacement of surrounding rocks, including a roof separation detector 2 and a roof separation displacement sensor 4 for monitoring the displacement of the roof in the tunnel 5, and a multi-light source laser rangefinder 1 and a positioning plate 3 for assisting in monitoring the displacement of the side walls and the bottom plate on both sides of the tunnel 5; the model of the multi-light source laser rangefinder 1 is the mining intrinsically safe type YHJ200J, and the roof separation detector 2 is the mining intrinsically safe type three-point GWL150.

[0022] The roof separation detector 2 is installed at the top of the tunnel 5, and multiple roof separation displacement sensors 4 are installed and evenly distributed above the roof separation detector 2, and the roof separation detector 2 and the multiple roof separation displacement sensors 4 are all located on the vertical symmetric center line of the tunnel; the positions of the multiple roof separation displacement sensors 4 located above the roof separation detector 2 are set to A from bottom to top. 1 , A2 , A 3 .

[0023] One gang of the lane 5 is vertically connected to the multi-light source laser rangefinder 1 , and the other gang is vertically connected to the positioning plate 3 , and the multi-light source laser rangefinder 1 corresponds to the positioning plate 3 in the horizontal direction, and the laser emitted by the multi-light source laser rangefinder 1 is vertically irradiated on the positioning plate 3 .

[0024] Working principle:

[0025] The multi-light source laser rangefinder 1, the positioning plate 3, the roof separation detector 2 and the three roof separation displacement sensors 4 are installed according to the position of the step structure, wherein the distance between the multi-light source laser rangefinder 1 and the sidewall of the lane 5 is a 1 , a 1 The installation close to the side of the lane is the actual measured value, a 1 <300mm; the distance between the positioning plate 3 and the sidewall of lane 5 is a 2 , a 2 The installation close to the side of the lane is the actual measured value, a 2 <300mm, the distance between the bottom of roof separation detector 2 and the top of lane 5 is b 1 , b 1 Installed close to the top plate is the actual measured value, b 1 <300mm.

[0026] When there is no displacement in tunnel 5: the distance between the bottom of roof separation detector 2 and the bottom of tunnel 5 is h ; The distance between the multi-light source laser rangefinder 1 and the top plate separation detector 2 is P 0 , the distance from the center of the tunnel floor is Q 0 , and the distance from the other side of the lane positioning plate 3 is l The included angle between the multi-light source laser rangefinder 1 and the roof separation detector 2 is α, and the included angle between the multi-light source laser rangefinder 1 and the center of the tunnel floor is β.

[0027] At this time, the tunnel width measured by the multi-light source laser rangefinder 1 is: X=a 1 +a 2 + l , the height between the bottom of roof separation detector 2 and the bottom of lane 5 is: Y=b 1 + h ,in h =P 0 sinα+Q 0 sinβ.

[0028] After the surrounding rock deformation occurred in tunnel 5, the measured value between the bottom of the roof separation detector 2 and the bottom of tunnel 5 was h 1 , h1 =P 1 sinα 1 +Q 1 sinβ 1 The measured value between the multi-light source laser rangefinder 1 and the roof separation detector 2 is P 1 , the measurement value between the center of the roadway floor is Q 1 , and the measurement between the other side of the lane positioning plate 3 is l 1 ; The angle measurement value between the multi-light source laser rangefinder 1 and the roof separation detector 2 is α 1 , the angle between the center of the tunnel floor is measured as β 1 .

[0029] At this time, the displacement of the two sides of the tunnel is: ΔX= l - l 1 , the reading of the top plate separation displacement sensor 4 at each base point of the top plate is ΔA 1 , ΔA 2 , ΔA 3 ;

[0030] The displacement of the left side of lane 5 is: ΔX 1 =P 0 cosα-P 1 cosα 1 ;

[0031] The displacement of the right side of lane 5 is: ΔX 2 = l 1 -ΔX 1 = l 1 -(P 0 cosα-P 1 cosα 1 );

[0032] The roof separation is: ΔA=ΔA 1 +ΔA 2 +ΔA 3 ;

[0033] The bottom drum volume of the bottom plate is: ΔW=Y-ΔA- h 1 -b 1 =P 0 sinα+Q 0 sinβ-(ΔA 1 +ΔA 2 +ΔA 3 )-(P 1 sinα 1 +Q 1 sinβ1 ).

[0034] The roof displacement can be directly monitored by the roof separation detector and the roof separation displacement sensor and obtained by calculating the difference before and after the displacement; the displacement of the sidewalls and the bottom slab bulge on both sides are assisted by the multi-light source laser rangefinder and the positioning plate to monitor the data and obtain the difference before and after the displacement. The monitoring data directly monitored by the multi-light source laser rangefinder and the roof separation detector is more accurate, thereby improving the monitoring accuracy and precision.

[0035] The monitoring layout structure of the utility model is simple. It only needs to set up a multi-light source laser rangefinder, a positioning plate, a roof separation detector and a roof separation displacement sensor in the tunnel. It solves the problems existing in the existing monitoring layout structure, such as the large number of monitoring sensors, complex installation, high failure rate, high cost, and easy interference in harsh underground environment, resulting in inaccurate monitoring results.

[0036] The above description is only used to illustrate the technical solution of the utility model rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the utility model by ordinary technicians in this field should be included in the scope of the claims of the utility model as long as they do not depart from the spirit and scope of the technical solution of the utility model.

Claims

1. An arrangement structure for accurate monitoring of surrounding rock displacement, characterized in that: It comprises a roof separation detector (2) and a roof separation displacement sensor (4) for monitoring the displacement of the roof in the tunnel (5), and a multi-light source laser rangefinder (1) and a positioning plate (3) for assisting in monitoring the displacement of the sidewalls and the bottom plate in the tunnel (5); The roof separation detector (2) is arranged at the top of the tunnel (5), and a plurality of roof separation displacement sensors (4) are arranged and evenly spaced just above the roof separation detector (2); one gang of the tunnel (5) is vertically connected to the multi-light source laser rangefinder (1), and the other gang is vertically connected to the positioning plate (3), and the multi-light source laser rangefinder (1) and the positioning plate (3) correspond in horizontal position, and the laser emitted by the multi-light source laser rangefinder (1) is vertically irradiated on the positioning plate (3); The installation distance between the multi-light source laser rangefinder (1) and the sidewall of the tunnel (5) is defined as a1, the installation distance between the positioning plate (3) and the sidewall of the tunnel (5) is defined as a2, and the installation distance between the bottom of the roof separation detector (2) and the top of the tunnel (5) is defined as b1; wherein the actual measured values ​​of a1, a2, and a3 are all less than 300 mm.

2. The arrangement structure for accurate monitoring of surrounding rock displacement according to claim 1, characterized in that: The roof separation detector (2) and the plurality of roof separation displacement sensors (4) are all located on the vertical symmetric center line of the tunnel.

3. The arrangement structure for accurate monitoring of surrounding rock displacement according to claim 2, characterized in that: The displacement ΔX1 of the left side of the lane (5) is determined by the displacement between the outer side surface of the multi-light source laser rangefinder (1) and the vertical symmetry center line of the lane; the displacement ΔX2 of the right side of the lane (5) is determined by subtracting the displacement of the left side from the distance between the multi-light source laser rangefinder (1) and the positioning plate (3) after displacement.

4. The arrangement structure for accurate monitoring of surrounding rock displacement according to claim 1 or 2, characterized in that: The positions of the plurality of roof separation displacement sensors (4) located above the roof separation detector (2) are arranged in order from bottom to top as A1, A2, and A3.

5. The arrangement structure for facilitating accurate monitoring of surrounding rock displacement according to claim 4, characterized in that: The roof separation amount ΔA of the tunnel (5) is determined by the sum of the separation components ΔA1, ΔA2 and ΔA3 of the plurality of roof separation displacement sensors (4), and the bottom plate bottom bulge ΔW of the tunnel (5) is determined by the displacement between the roof separation detector (2) and the bottom plate minus the roof separation amount ΔA.

6. The arrangement structure for accurate monitoring of surrounding rock displacement according to claim 1, characterized in that: The model of the multi-light source laser rangefinder (1) is the mining intrinsically safe type YHJ200J.

7. The arrangement structure for accurate monitoring of surrounding rock displacement according to claim 1 or 2, characterized in that: The roof separation detector (2) is a mining intrinsically safe three-point GWL150.

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