Method and device for repairing coal mining ground fissures

Abstract

The invention discloses a coal mining ground fracture repairing method and a coal mining ground fracture repairing device. The method comprises the following steps: acquiring the terrain of a coal face; the filling coal mining crack rate of a target area is obtained, the corresponding target speed is obtained, the target area is one of an uphill section, a downhill section and a smooth section, and the target area is in one-to-one correspondence with the target speed; at least according to the target speed, calculating the maximum pushing and collecting speed of the target area corresponding to the target speed; a preset time period is determined at least according to the preset pushing and mining speed, in the coal pushing and mining process, preset materials are injected into the ground fissures every preset time period to fill the ground fissures till pushing and mining are completed, the ground fissures are formed in the mode that coal mining is conducted on the coal face at the preset pushing and mining speed, and the preset pushing and mining speed is smaller than or equal to the maximum pushing and mining speed; the predetermined material includes a microbial curing material. The technical problems that in the prior art, the ground fracture repairing accuracy is low, the filling interval time is unreasonable, and the repairing mode is lagged are solved.

Description

Technical Field

[0001] The present invention relates to the field of geological engineering technology, and in particular to a method for repairing ground fissures caused by coal mining, a device for repairing ground fissures caused by coal mining, a computer-readable storage medium, and a computer program product. Background Art

[0002] The western part of my country is rich in coal resources, but the ecological environment is fragile. Among them, the repair of coal mining ground fissures is of great significance to the control of soil erosion and ecological degradation. Compared with the traditional coal mining ground fissure repair method, there are the following problems: 1) The changes in the filling characteristics of the ground fissures caused by wind deposits are not considered, resulting in poor repair effects; 2) The filling characteristics are different under different terrain conditions, and the repair methods used in the past are the same, resulting in uneven effects; 3) The repair of ground fissures with auxiliary materials such as chemical materials or microbial materials has secondary pollution to the ecological environment; 4) Electric traction microbial materials may cause the number of effective live microorganisms to be limited, and the repair speed is slow; 5) Traditional repairs are all carried out after coal seam mining, and are not carried out during the mining process, which causes the ecology to continue to degrade for a long time, causing greater environmental impact.

[0003] To address the above-mentioned problems, no effective solution has been proposed yet. Summary of the invention

[0004] The embodiments of the present invention provide a method for repairing coal mining ground fissures, a device for repairing coal mining ground fissures, a computer-readable storage medium, and a computer program product, so as to at least solve the technical problems in the prior art of low accuracy in repairing ground fissures, unreasonable filling interval time, and lagging repair methods.

[0005] According to one aspect of an embodiment of the present invention, a method for repairing coal mining ground fissures is provided, comprising: obtaining the terrain of a coal mining face, wherein the terrain includes an uphill section, a downhill section and a gentle section; obtaining a rate of filling coal mining cracks in a target area to obtain a corresponding target speed, wherein the target area is one of the uphill section, the downhill section and the gentle section, and the target area corresponds to the target speed one by one; calculating a maximum mining speed of the target area corresponding to the target speed at least based on the target speed; determining a predetermined time period at least based on a predetermined mining speed, and during coal mining, injecting a predetermined material into the ground fissures every predetermined time period to fill the ground fissures until mining is completed, wherein the ground fissures are formed by coal mining at the coal mining face at the predetermined mining speed, the predetermined mining speed is less than or equal to the maximum mining speed, and the predetermined material comprises a microbial solidification material.

[0006] Optionally, obtaining the topography of the coal mining face includes: performing a topographic survey on the coal mining face to obtain a topographic survey result, wherein the topographic survey result includes the elevations of a plurality of predetermined points and the positions of the plurality of predetermined points, wherein the predetermined point is any point on the coal mining face; obtaining the elevation difference between two adjacent predetermined points and the slope of two adjacent predetermined points along the pushing direction of the coal mining face, wherein the elevation difference is the difference between the elevation of the latter predetermined point and the elevation of the former predetermined point; when the elevation difference is greater than 0 and the slope is greater than a predetermined value, determining that the coal mining face corresponding to the positions of the two predetermined points is the uphill section; when the elevation difference is less than 0 and the slope is greater than a predetermined value, determining that the coal mining face corresponding to the positions of the two predetermined points is the downhill section; and the remaining coal mining face is the flat section.

[0007] Optionally, the rate of filling coal mining cracks in the target area is obtained to obtain a corresponding target speed, including: obtaining the average wind speed during the time period of pushing mining in the target area; obtaining the length of time required to fill the ground cracks of unit height under the condition of the average wind speed, to obtain the target speed.

[0008] Optionally, calculating the maximum pushing speed of the target area corresponding to the target speed includes: obtaining the buried depth of the coal seam, the development depth of the ground fissures and the coal mining fissure angle of the coal mining face; according to the formula The maximum pushing speed Vmax is calculated, wherein w is the safety factor, w=0.8-0.9, h is the burial depth of the coal seam, m is the development depth of the ground fissure, and φ is the coal mining fissure angle.

[0009] Optionally, determining the predetermined time period at least according to a predetermined pushing and mining speed includes: obtaining a time length T corresponding to the cycle of the coal mining face at the predetermined pushing and mining speed; according to the formula The predetermined time period t is calculated, wherein N is the number of times the predetermined material is injected into the ground fissure.

[0010] Optionally, the microbial solidification material includes a solid phase and a liquid phase. During the coal mining process, a predetermined material is injected into the ground fissures to fill the ground fissures at predetermined time intervals until the mining is completed, including: an injection step, injecting the predetermined material into the bottom of the ground fissures at a predetermined pressure until the liquid phase overflows, and the predetermined pressure is greater than 0.05MPa; a repetition step, repeating the injection step multiple times, and in the repetition process updating the mass ratio of the solid phase to the liquid phase in the predetermined material to a predetermined multiple of the mass ratio of the solid phase to the liquid phase in the predetermined material in the last repetition process, and the predetermined multiple is greater than 1.1, until the mining is completed.

[0011] Optionally, after coal mining is completed, the method for repairing coal mining ground fissures further includes: injecting a predetermined proportion of the predetermined material into the bottom of the ground fissure, wherein the predetermined proportion is greater than the mass ratio of the solid phase to the liquid phase in the last predetermined material in the repeated step.

[0012] According to another aspect of an embodiment of the present invention, a device for repairing coal mining ground fissures is also provided, comprising: a first acquisition unit, used to acquire the terrain of a coal mining face, wherein the terrain comprises an uphill section, a downhill section and a gentle section; a second acquisition unit, used to acquire the filling rate of coal mining cracks in a target area, and obtain a corresponding target speed, wherein the target area is one of the uphill section, the downhill section and the gentle section, and the target area corresponds to the target speed one by one; a calculation unit, used to calculate the maximum mining speed of the target area corresponding to the target speed at least based on the target speed; a determination unit, used to determine a predetermined time period at least based on a predetermined mining speed, and during the coal mining process, inject a predetermined material into the ground fissures every predetermined time period to fill the ground fissures until the mining is completed, wherein the ground fissures are formed by coal mining at the coal mining face at the predetermined mining speed, the predetermined mining speed is less than or equal to the maximum mining speed, and the predetermined material comprises a microbial solidification material.

[0013] Optionally, the first acquisition unit includes: a topographic measurement subunit, which is used to perform topographic measurement on the coal mining face to obtain topographic measurement results, wherein the topographic measurement results include the elevations of multiple predetermined points and the positions of multiple predetermined points, wherein the predetermined point is any point on the coal mining face; a first acquisition subunit, which is used to obtain the elevation difference between two adjacent predetermined points and the slope of two adjacent predetermined points along the pushing and mining direction of the coal mining face, wherein the elevation difference is the difference between the elevation of the latter predetermined point and the elevation of the former predetermined point; a first determination subunit, which is used to determine that the coal mining face corresponding to the positions of the two predetermined points is the uphill section when the elevation difference is greater than 0 and the slope is greater than a predetermined value; a second determination subunit, which is used to determine that the coal mining face corresponding to the positions of the two predetermined points is the downhill section when the elevation difference is less than 0 and the slope is greater than a predetermined value; and a third determination subunit, which is used to determine that the remaining coal mining faces are the flat section.

[0014] Optionally, the second acquisition unit includes: a second acquisition subunit, used to obtain the average wind speed within the time period of the target area; and a third acquisition subunit, used to obtain the length of time required to fill the ground fissure of unit height under the condition of the average wind speed, so as to obtain the target speed.

[0015] Optionally, the calculation unit includes: a fourth acquisition subunit, which is used to obtain the buried depth of the coal seam, the development depth of the ground fissures and the coal mining fissure angle of the coal mining working face; a first calculation subunit, which is used to calculate the coal mining working face according to the formula The maximum pushing speed Vmax is calculated, wherein w is the safety factor, w=0.8-0.9, h is the burial depth of the coal seam, m is the development depth of the ground fissure, and φ is the coal mining fissure angle.

[0016] Optionally, the determination unit includes: a fifth acquisition subunit, used to obtain the time length T corresponding to the cycle of the coal mining working face at the predetermined pushing speed; a second calculation subunit, used to calculate according to the formula The predetermined time period t is calculated, wherein N is the number of times the predetermined material is injected into the ground fissure.

[0017] Optionally, the determination unit comprises: an injection subunit, used for an injection step, injecting the predetermined material into the bottom of the ground fissure at a predetermined pressure until the liquid phase overflows, and the predetermined pressure is greater than 0.05MPa; a repetition subunit, used for a repetition step, repeating the injection step multiple times, and in the repetition process updating the mass ratio of the solid phase to the liquid phase in the predetermined material to a predetermined multiple of the mass ratio of the solid phase to the liquid phase in the predetermined material in the last repetition process, and the predetermined multiple is greater than 1.1, until the mining is completed.

[0018] Optionally, the coal mining ground fissure repairing device further includes: an injection unit, used for injecting a predetermined proportion of the predetermined material into the bottom of the ground fissure after coal mining is completed, wherein the predetermined proportion is greater than the mass ratio of the solid phase to the liquid phase in the last predetermined material in the repeated step.

[0019] According to another aspect of an embodiment of the present invention, a computer-readable storage medium is also provided, wherein the computer-readable storage medium includes a stored program, wherein when the program is running, the device where the computer-readable storage medium is located is controlled to execute any one of the above-mentioned methods for repairing coal mining ground fissures.

[0020] According to another aspect of an embodiment of the present invention, a processor is further provided, wherein the processor is used to run a program, wherein the program, when running, executes any one of the above-mentioned methods for repairing coal mining ground fissures.

[0021] According to another aspect of an embodiment of the present invention, a computer program product is provided, including a computer program, which, when executed by a processor, implements the steps of any one of the above-mentioned methods for repairing coal mining ground fissures.

[0022] In an embodiment of the present invention, the terrain of a coal mining face is obtained, wherein the terrain includes an uphill section, a downhill section and a gentle section; the rate of filling coal mining cracks in a target area is obtained to obtain a corresponding target speed, wherein the target area is one of the uphill section, the downhill section and the gentle section, and the target area corresponds to the target speed one by one; at least based on the target speed, the maximum mining speed of the target area corresponding to the target speed is calculated; at least based on a predetermined mining speed, a predetermined time period is determined, and during the coal mining process, a predetermined material is injected into the ground cracks every predetermined time period to fill the ground cracks until the mining is completed, wherein the ground cracks are formed when the coal mining face mines coal at a predetermined mining speed, the predetermined mining speed is less than or equal to the maximum mining speed, and the predetermined material includes a microbial solidification material. Through the technical scheme provided by the present invention, the correspondence between the pressure during the coal mining cycle and the development of ground fissures during coal mining is achieved, terrain factors are taken into consideration, microbial solidification is used for continuous repair, and the microbial technology using fixed sulfur ash as a calcium source is combined to be more suitable for the repair of the coal mining process. At the same time, the speed of coal mining is limited, and the purpose of carrying out the work under the law of mine pressure is achieved, thereby achieving the technical effect of green, high-strength, and high-impermeability coal mining ground fissure repair, improving the timeliness and accuracy of ground fissure repair, and further solving the technical problems of low accuracy of ground fissure repair, unreasonable filling interval time, and lagging repair method in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0024] Figure 1 It is a hardware structure block diagram of a mobile terminal of a method for repairing coal mining ground fissures according to an embodiment of the present invention;

[0025] Figure 2 is a flow chart of a method for repairing coal mining ground fissures according to an embodiment of the present invention;

[0026] Figure 3 is a flow chart of an optional method for repairing coal mining ground fissures according to an embodiment of the present invention;

[0027] Figure 4 It is a schematic diagram of a device for repairing coal mining ground fissures according to an embodiment of the present invention.

[0028] The above drawings include the following reference numerals:

[0029] 102, processor; 104, memory; 106, transmission device; 108, input and output devices. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0031] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0032] As introduced in the background technology, the ground fissure repair accuracy in the prior art is low, the filling interval time is unreasonable, and the repair method is lagging. In view of the above defects, a method for repairing coal mining ground fissures, a repairing device for coal mining ground fissures, a computer readable storage medium, and a computer program product are provided in the embodiments of the present invention.

[0033] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0034] The method embodiments provided in the embodiments of the present invention can be executed in a mobile terminal, a computer terminal or a similar computing device. Taking running on a mobile terminal as an example, Figure 1 1 is a hardware structure block diagram of a mobile terminal of a method for repairing coal mining ground fissures according to an embodiment of the present invention. Figure 1 As shown, the mobile terminal may include one or more ( Figure 1 Only one is shown in the figure) a processor 102 (the processor 102 may include but is not limited to a processing device such as a microprocessor MCU or a programmable logic device FPGA) and a memory 104 for storing data, wherein the mobile terminal may also include a transmission device 106 and an input / output device 108 for communication functions. It can be understood by those skilled in the art that Figure 1 The structure shown is only for illustration and does not limit the structure of the mobile terminal. Figure 1More or fewer components as shown, or with Figure 1 Different configurations are shown.

[0035] The memory 104 can be used to store computer programs, for example, software programs and modules of application software, such as the computer program corresponding to the method for repairing coal mining ground fissures in the embodiment of the present invention. The processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, that is, to implement the above method. The memory 104 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 104 may further include a memory remotely arranged relative to the processor 102, and these remote memories can be connected to the mobile terminal via a network. Examples of the above-mentioned network include but are not limited to the Internet, an intranet, a local area network, a mobile communication network, and a combination thereof. The transmission device 106 is used to receive or send data via a network. The above-mentioned specific examples of the network may include a wireless network provided by a communication provider of the mobile terminal. In one example, the transmission device 106 includes a network adapter (Network Interface Controller, referred to as NIC), which can be connected to other network devices through a base station so as to communicate with the Internet. In one example, the transmission device 106 may be a radio frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0036] According to an embodiment of the present invention, a method embodiment of a method for repairing ground fissures caused by coal mining is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0037] Figure 2 Flow chart of a method for repairing coal mining ground fissures according to an embodiment of the present invention, Figure 2 As shown, the method comprises the following steps:

[0038] Step S202, obtaining the topography of the coal mining face, wherein the topography includes an uphill section, a downhill section, and a flat section.

[0039] In this embodiment, obtaining the terrain of the coal mining face can help determine the specific location and shape of the ground fissures, so that repair work can be carried out in a targeted manner. By obtaining the terrain of the uphill section, the specific location and shape of the ground fissures on the hillside can be determined, which helps to select appropriate repair methods and materials to prevent the ground fissures from continuing to expand. Obtaining the terrain of the downhill section can help determine the specific location and shape of the ground fissures at the foot of the mountain, which helps to select appropriate repair methods to avoid damage to the foot of the mountain caused by ground fissures. Understanding the terrain of the flat section can help determine the specific location and shape of the ground fissures in the flat area, which helps to formulate an effective repair plan to ensure the comprehensiveness and durability of the ground fissure repair.

[0040] Step S204, obtaining the filling coal mining fracture rate of the target area to obtain the corresponding target speed, wherein the target area is one of the uphill section, the downhill section and the gentle section, and the target area corresponds to the target speed one by one.

[0041] In this embodiment, the filling coal mining crack rate of the target area is obtained and the corresponding target speed is obtained, so that the crack repair priority and repair plan of different areas can be determined. By analyzing the crack rate, the expansion of cracks in different areas can be judged, so as to formulate targeted repair measures and give priority to repairing areas with higher crack rates to prevent further aggravation of geological disaster risks. At the same time, according to different target speeds, suitable filling materials and repair methods can be selected to ensure that the repair effect achieves the expected goal.

[0042] Step S206, calculating the maximum pushing and mining speed of the target area corresponding to the target speed at least according to the target speed.

[0043] It should be noted that the above-mentioned maximum pushing and mining speed refers to the speed at which the equipment can push and collect the maximum amount of ore or other materials per hour during mining work. Generally speaking, the higher the maximum pushing and mining speed, the more ore can be collected faster, thereby improving production efficiency and output.

[0044] In this embodiment, the maximum mining speed of the target area corresponding to the target speed means that in the process of repairing ground fissures, in order to ensure the stability of the geological structure and effectively repair the ground fissures, the mining speed needs to be controlled within a certain range, so as to avoid problems such as formation deformation and ground fissure expansion caused by excessively fast mining speed. By calculating the maximum mining speed of the target area corresponding to the target speed, the safe mining speed range in the process of repairing coal mining ground fissures can be determined, thereby ensuring the smooth progress of the repair work, while also reducing the risk of geological disasters, and helping engineers and technicians to formulate reasonable construction plans to ensure the quality and safety of the repair work.

[0045] Step S208, at least according to the predetermined mining speed, determine the predetermined time period, and during the coal mining process, inject predetermined materials into the ground fissures every predetermined time period to fill the ground fissures until the mining is completed, wherein the ground fissures are formed by the coal mining face mining at the predetermined mining speed, the predetermined mining speed is less than or equal to the maximum mining speed, and the predetermined materials include microbial solidification materials.

[0046] In this embodiment, the ground fissures are filled by regularly injecting predetermined materials into the ground fissures to prevent the ground fissures from expanding or causing ground collapse. The microbial solidification materials in the predetermined materials can form solid fillings in the ground fissures, enhance the stability of the geological structure, protect the geological environment around the coal mining face, effectively repair the ground fissures, and ensure safety and stability during the coal mining process.

[0047] As can be seen from the above, in an embodiment of the present invention, the terrain of the coal mining face is obtained, wherein the terrain includes an uphill section, a downhill section and a gentle section; the filling rate of coal mining cracks in the target area is obtained to obtain a corresponding target speed, wherein the target area is one of the uphill section, the downhill section and the gentle section, and the target area corresponds to the target speed one by one; at least based on the target speed, the maximum pushing and mining speed of the target area corresponding to the target speed is calculated; at least based on the predetermined pushing and mining speed, a predetermined time period is determined, and during the coal pushing and mining process, a predetermined material is injected into the ground cracks every predetermined time period to fill the ground cracks until the pushing and mining is completed, wherein the ground The cracks are formed when the coal mining face is mined at a predetermined pushing speed. The predetermined pushing speed is less than or equal to the maximum pushing speed. The predetermined materials include microbial solidification materials, which achieves the correspondence between the pressure based on the coal mining cycle and the development of coal mining ground cracks. Taking terrain factors into consideration, microbial solidification is used for continuous repair, and the microbial technology with fixed sulfur ash as the calcium source is more suitable for the repair of the coal mining process. At the same time, the speed of coal mining is restricted. The purpose of carrying out the work under the mine pressure law is achieved, thereby achieving the technical effect of green, high-strength, and high-permeability coal mining ground crack repair, and improving the timeliness and accuracy of ground crack repair.

[0048] The technical solution provided by the embodiment of the present invention solves the technical problems in the prior art of low accuracy in repairing ground fissures, unreasonable filling intervals, and lagging repair methods.

[0049] According to the above embodiment of the present invention, obtaining the topography of a coal mining face includes: performing a topographic survey on the coal mining face to obtain a topographic survey result, wherein the topographic survey result includes the elevations of a plurality of predetermined points and the positions of a plurality of predetermined points, where the predetermined point is any point on the coal mining face; obtaining the elevation difference between two adjacent predetermined points and the slope of two adjacent predetermined points along the pushing and mining direction of the coal mining face, wherein the elevation difference is the difference between the elevation of the latter predetermined point and the elevation of the former predetermined point; when the elevation difference is greater than 0 and the slope is greater than a predetermined value, determining that the coal mining face corresponding to the positions of the two predetermined points is an uphill section; when the elevation difference is less than 0 and the slope is greater than a predetermined value, determining that the coal mining face corresponding to the positions of the two predetermined points is a downhill section; and the remaining coal mining face is a flat section.

[0050] Optionally, the above-mentioned topographic measurement may include, but is not limited to: topographic features such as ground elevation, slope, and inclination, and coal seam characteristics such as coal seam thickness, strike, and inclination.

[0051] It should be noted that the elevation of the above-mentioned ground usually refers to the height of the ground relative to a certain reference plane. The sea level is generally used as the reference plane to measure the elevation of the ground. It can be obtained by using measuring instruments such as levels and GPS. In the topographic measurement of coal mining working faces, the elevation data of the ground can help determine the changes in the topography of the mining area, so as to effectively plan and design the coal mining working faces.

[0052] In this embodiment, the terrain measurement results can help determine the terrain conditions of the coal mining face, including information such as elevation difference and slope. By analyzing the terrain measurement results, the different sections of the coal mining face can be determined, including uphill sections, downhill sections, and gentle sections. This helps to select appropriate repair methods and materials in a targeted manner according to the terrain conditions when repairing ground fissures.

[0053] Figure 3 Flow chart of an optional method for repairing coal mining ground fissures according to an embodiment of the present invention, such as Figure 3 As shown, the terrain is measured before coal mining, and the coal mining sections are divided according to the terrain measurement.

[0054] Specifically, before coal mining, a topographic survey of the coal mining face is carried out. Topographic survey refers to measuring the elevation and coordinates of a point every 10 meters along the direction of the coal mining face. Based on the topographic survey results, the coal mining topographic area is divided into an uphill section, a downhill section and a gentle section. The uphill section refers to the direction along which the elevations of adjacent measuring points become larger, and the slope between adjacent measuring points is greater than 10° (i.e., a predetermined value) along the direction along which the coal mining face advances. The downhill section refers to the direction along which the elevations of adjacent measuring points become smaller, and the slope between adjacent measuring points is greater than 10°. The gentle section refers to the situation other than the uphill section and the downhill section.

[0055] According to the above embodiment of the present invention, the filling rate of coal mining cracks in the target area is obtained to obtain the corresponding target speed, including: obtaining the average wind speed within the time period of the target mining area; obtaining the length of time required to fill the ground cracks of unit height under the condition of average wind speed to obtain the target speed.

[0056] It should be noted that the above-mentioned average wind speed can be obtained by monitoring equipment or meteorological data to obtain the average wind speed of the target area within a specific time period. The length of time required to fill the ground fissures of unit height can be obtained by experiments or calculations based on geological conditions and the properties of the filling materials. The above-mentioned target speed can be obtained by dividing the length of time required to fill the ground fissures of unit height by the average wind speed within the time period of the target area for mining.

[0057] In this embodiment, the average wind speed during the time period of the target mining area can be obtained to understand the impact of wind on the repair of ground fissures, and a repair plan can be formulated according to the expansion of ground fissures under different wind speeds. At the same time, based on the length of time required to fill ground fissures of unit height under average wind speed conditions, the time and workload required to repair the ground fissures can be estimated, so as to reasonably arrange the repair plan and resources.

[0058] It should be noted that the above-mentioned coal mining crack filling rate refers to the rate at which the filling material in the gaps is filled into the coal seam cracks by grouting and other means during the coal mining process to prevent coal seam collapse and protect the safety of the mine. The coal mining crack filling rate depends on factors such as the width and depth of the cracks, the nature and fluidity of the filling material, and the pressure and speed of grouting. By reasonably controlling the coal mining crack filling rate, the safety and production efficiency of the mine can be effectively improved.

[0059] like Figure 3 As shown, the coal mining crack angle φ of the coal mining face (i.e., the rate of filling coal mining cracks) is obtained, the coal mining crack angle φ of the coal mining face is obtained by using an established physical simulation experiment, and the rate of filling coal mining cracks with aeolian deposits in the uphill section, downhill section and gentle section is obtained. The filling rate refers to the time required to fill a unit height of the cracks under the average wind speed conditions during the coal mining period. It is obtained through on-site measurement of ground cracks on coal mining faces under similar conditions, and the filling rates of the uphill section, downhill section and gentle section are recorded as V1, V2 and V3 (i.e., target speed), respectively.

[0060] According to the above embodiment of the present invention, the maximum pushing speed of the target area corresponding to the target speed is calculated, including: obtaining the burial depth of the coal seam, the development depth of the ground fissures and the coal mining crack angle of the coal mining working face; according to the formula Calculate the maximum pushing speed Vmax, where w is the safety factor, w=0.8~0.9, h is the burial depth of the coal seam, m is the development depth of the ground fissure, and φ is the coal mining fissure angle.

[0061] It should be noted that the above refers to the depth of the coal seam from the ground surface, usually measured in meters or feet, obtained through geological exploration, underground measurement and ground measurement. The development depth of the above-mentioned ground fissures depends on many factors. Through geological surveys, groundwater level monitoring, ground deformation monitoring and other means, the distribution and depth of coal mine ground fissures can be understood more accurately.

[0062] In this embodiment, the burial depth of the coal seam, the development depth of the ground fissures and the coal mining fissure angle of the coal mining face are important parameters that affect the safety and efficiency of the coal mining operation. The maximum pushing and mining speed can be calculated according to the formula, which is conducive to determining the appropriate coal mining speed and avoiding geological disasters caused by excessive speed. Understanding the burial depth of the coal seam, the development depth of the ground fissures and the coal mining fissure angle can help determine the location and range of the ground fissures, thereby selecting the appropriate repair method to ensure the stability and safety of the geological structure.

[0063] Specifically, the maximum pushing speed Vmax (i.e., the maximum pushing speed) of each section of the coal mining face is calculated. If the section is uphill, then Among them, w is the safety factor, m is the depth of ground fissure development in coal mining, obtained through conventional physical simulation, and h is the burial depth of the coal seam, obtained through the drilling column chart; if this section is downhill, then If the segment is flat,

[0064] According to the above embodiment of the present invention, the predetermined time period is determined at least according to the predetermined pushing and mining speed, including: obtaining the time length T corresponding to the cycle of the coal mining working face at the predetermined pushing and mining speed; according to the formula The predetermined time period t is calculated, where N is the number of times the predetermined material is injected into the ground fissure.

[0065] In this embodiment, the calculation of the predetermined time period and the number of injections of the predetermined material can ensure that the ground fissure repair work can be carried out at a predetermined speed and rhythm. By calculating the predetermined time period and the number of injections, the cycle and duration of the coal mining face can be effectively controlled to ensure that the ground fissure repair work can be completed within the specified time, thereby reducing the risk of geological disasters and ensuring the safety and stability of coal mining operations.

[0066] According to the above embodiment of the present invention, the microbial solidification material includes a solid phase and a liquid phase. During the coal mining process, a predetermined material is injected into the ground fissures at predetermined time intervals to fill the ground fissures until the mining is completed, including: an injection step, injecting the predetermined material into the bottom of the ground fissures at a predetermined pressure until the liquid phase overflows, and the predetermined pressure is greater than 0.05MPa; a repeating step, repeating the injection step multiple times, and in the repeated process updating the mass ratio of the solid phase to the liquid phase in the predetermined material to a predetermined multiple of the mass ratio of the solid phase to the liquid phase in the predetermined material in the last repeated process, the predetermined multiple being greater than 1.1, until the mining is completed.

[0067] In this embodiment, by injecting predetermined materials into the bottom of the ground fissures at a predetermined pressure, the cracks can be filled and the strata can be reinforced to prevent further expansion of the cracks or the occurrence of geological disasters. Repeating the injection steps multiple times can ensure that the ground fissures are fully filled and solidified, thereby improving the repair effect. At the same time, updating the mass ratio of the solid phase to the liquid phase can adjust the properties of the predetermined material to make the repair effect more stable and lasting. The entire process is repeated until the mining is completed, which can ensure that the ground fissure repair work is comprehensive and thorough.

[0068] like Figure 3 As shown, the coal mining face starts mining at a speed V at or below Vmax, and during the coal mining process, the coal mining ground fissures that appear are repaired.

[0069] It should be noted that the above-mentioned repair material is a microbial solidification material, including two parts: a solid phase and a liquid phase. The solid phase includes Bacillus megaterium powder (effective live bacteria per gram is 100 billion or more), sulfur-fixing ash and urea, with a mass ratio of 1:0.5-1:0.5-1.5, wherein the sulfur-fixing ash is ground, and the particle size after grinding should be less than 45 microns. The liquid phase is pure water, and the mass ratio of the solid phase to the liquid phase is 1:5-1:15. The pH value of the mixture of the solid phase, the liquid phase and the aeolian deposits is controlled within the range of 8-10.

[0070] Specifically, the repair process is as follows: from the appearance of the coal mining ground fissure, a mixture of solid and liquid is injected into the coal mining ground fissure N times (N is 3-5), and the interval between each injection is Where T is the time required for the coal mining face cycle at the coal mining speed V, which is calculated through conventional numerical simulation experiments. The solid:liquid ratio of each injection should be increased by more than 10% compared with the previous time. The end standard of each injection is that the pinhole is inserted into the bottom of the coal mining ground fissure and injected at a pressure of 0.05MPa until liquid overflows.

[0071] According to the above embodiment of the present invention, after coal mining is completed, the method for repairing coal mining ground fissures also includes: injecting a predetermined proportion of a predetermined material into the bottom of the ground fissure, wherein the predetermined proportion is greater than the mass ratio of the solid phase to the liquid phase in the last predetermined material in the repeated step.

[0072] In this embodiment, it can be ensured that the bottom of the ground fissure is fully filled with the predetermined material, making the repair effect more durable and stable. By injecting a predetermined proportion of the predetermined material, the density and firmness of the ground fissure repair material can be increased, thereby improving the geomechanical properties and compressive resistance, extending the service life of the ground fissure, and reducing the occurrence of geological disasters.

[0073] Specifically, after coal mining is completed, the above-mentioned material is used to carry out secondary injection into the coal mining ground fissures, and the quality of the solid phase and liquid phase of the material is increased by more than 10% compared with the above-mentioned last injection ratio.

[0074] It should be noted that due to the fragile ecological environment of a certain Fengshatan mining area but rich coal resources, in order to protect the fragile ecological environment of the area, the ground fissures mined at the 2205 coal mining face were repaired.

[0075] The following is an example of the repair of ground fissures in the 2205 coal mining face to illustrate the embodiment, and the specific steps are as follows: 1) Before coal mining, the topography of the coal mining face is measured; 2) According to the topographic measurement results, the coal mining terrain area is divided, including the uphill section, the downhill section and the gentle section, and a total of 18 uphill sections, 20 downhill sections, and 19 gentle sections are divided; 3) The coal mining fissure angle φ of the coal mining face is obtained, and the coal mining fissure angle φ of the coal mining face is obtained by using the established physical simulation experiment = 62°; 4) The rate of aeolian sand filling the coal mining fissures in the uphill section, the downhill section and the gentle section is obtained, and the filling rates of the uphill section, the downhill section and the gentle section are recorded as V1 = 0.9 cm / d, V2 = 1.3 cm / d and V3 = 1.1 cm / d respectively; 5) The maximum pushing speed Vmax of each section of the coal mining face is calculated. If the uphill section, then If this section is downhill, If the segment is flat, 6) The coal mining face starts mining at a speed V=1.4m / d or less at Vmax; 7) During the coal mining process, the coal mining ground fissures that appear are repaired. The repair material is a microbial solidification material, including two parts, solid phase and liquid phase. The solid phase includes Bacillus megaterium powder (effective live bacteria per gram is 100 billion or more), solid sulfur ash and urea, with a mass ratio of 1:1:1. The mass ratio of the solid phase to the liquid phase is 1:10 for the first time, 1:9 for the second time, 1:8 for the third time, and 1:7 for the fourth time. The pH value of the mixture of the solid phase, liquid phase and aeolian sand is 8.8 for the first time, 8.9 for the second time, 9.1 for the third time, and 9.3 for the fourth time. The repair process is: from the appearance of the coal mining ground fissures, inject the mixture of solid phase and liquid phase into the coal mining ground fissures in 4 times, with an interval of 1:1 between each injection. Wherein T=14.3d is the time required for the cycle of coal mining face with coal mining speed V=1.4m / d, which is calculated through conventional numerical simulation experiments. The solid:liquid ratio of each injection should be increased by more than 10% compared with the previous time. The end standard of each injection is that the pinhole is inserted into the bottom of the coal mining fissure and injected at a pressure of 0.05MPa until liquid overflows; 8) After the coal mining is completed, the above-mentioned materials are used to carry out secondary injection of coal mining fissures. The quality of the solid and liquid phases of the materials is increased by more than 10% compared with the last injection ratio (solid-liquid ratio is 1:6).

[0076] The technical solution provided by the above-mentioned embodiments of the present invention solves the problem of low accuracy in ground fissure repair in the prior art, and has the following beneficial effects: 1) large-scale earthwork repair is not required, and the implementation is simple and easy; 2) repair is carried out according to the characteristics of aeolian deposits, and the scope of application is wider; 3) terrain changes are taken into account, and the accuracy is high; 4) mining waste and green microbial materials are used, which is more environmentally friendly.

[0077] From the above, it can be seen that in the embodiment of the present invention, since the coal mining ground fissures are easily filled with aeolian deposits, but are subject to the influence of factors such as the mine pressure of coal mining, the filling degree of the coal mining ground fissures is different, which results in the unsatisfactory reinforcement effect of the traditional coal mining ground fissure repair method. The embodiment of the present invention is different from the traditional coal mining ground fissure reinforcement. It gradually carries out cementation during the coal mining process, based on the corresponding relationship between the pressure of the coal mining cycle and the development of the coal mining ground fissures, and taking into account the terrain factors (the different deposition rates of aeolian deposits in coal mining ground fissures in different terrains), microbial solidification is used for the entire coal mining ground fissure process. Repair is carried out in the process of coal mining, and the microbial solidification process is ongoing. Therefore, the use of microbial solidification can overcome the problem that the cementing body is easily disturbed by the stress field of coal mining in the later stage during coal mining, and can continuously repair the ground fissures caused by coal mining. In addition, the use of fixed sulfur ash as a calcium source has certain slow-release and expansibility, and is more suitable for the repair of the coal mining process (continuous stress disturbance) (expansion can make the cracks disturbed by stress continue to heal). Finally, the speed of coal mining is restricted to prevent the ground fissures caused by coal mining from closing due to coal mining pressure without sufficient filling, which will cause the lack of cementing nuclei in the later stage of cementation.

[0078] That is, the above-mentioned technical scheme provided by the embodiment of the present invention comprehensively considers various factors, breaks through the traditional method of repairing ground fissures after coal mining is stabilized, makes full use of aeolian deposits filling in the process of coal mining, and combines microbial technology with fixed sulfur ash as calcium source, and carries out under the law of mine pressure, forming a better (green, high strength, high permeability) coal mining ground fissure repair effect.

[0079] It should be noted that, for the aforementioned method embodiments, for the sake of simplicity, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the present application is not limited by the described order of actions, because according to the present application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present application.

[0080] Through the description of the above implementation methods, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes a number of instructions for a terminal device (which can be a mobile phone, computer, server, or network device, etc.) to execute the methods of each embodiment of the present application.

[0081] According to an embodiment of the present invention, a device for repairing coal mining ground fissures for implementing the above-mentioned method for repairing coal mining ground fissures is also provided. Figure 4 Schematic diagram of a repairing device for coal mining ground fissures according to an embodiment of the present invention. Figure 4 As shown, the device includes: a first acquisition unit 401, a second acquisition unit 403, a calculation unit 405 and a determination unit 407. The device for repairing coal mining ground fissures is described below.

[0082] The first acquisition unit 401 is used to acquire the topography of the coal mining face, wherein the topography includes an uphill section, a downhill section, and a flat section.

[0083] The second acquisition unit 403 is used to acquire the filling coal mining fracture rate of the target area to obtain the corresponding target speed, wherein the target area is one of the uphill section, the downhill section and the flat section, and the target area corresponds to the target speed one by one.

[0084] The calculation unit 405 is used to calculate the maximum pushing and picking speed of the target area corresponding to the target speed at least according to the target speed.

[0085] The determination unit 407 is used to determine the predetermined time period based on at least a predetermined mining speed, and during the coal mining process, inject a predetermined material into the ground fissures every predetermined time period to fill the ground fissures until the mining is completed, wherein the ground fissures are formed when the coal mining face mines coal at a predetermined mining speed, the predetermined mining speed is less than or equal to the maximum mining speed, and the predetermined material includes a microbial solidification material.

[0086] It should be noted here that the above-mentioned first acquisition unit 401, second acquisition unit 403, calculation unit 405 and determination unit 407 correspond to steps S202 to S208 in the above-mentioned embodiments, and the four modules are the same as the instances and application scenarios implemented by the corresponding steps, but are not limited to the contents disclosed in the above-mentioned embodiments.

[0087] As can be seen from the above, in the scheme recorded in the above-mentioned embodiment of the present invention, first, the first acquisition unit can be used to acquire the terrain of the coal mining working face, wherein the terrain includes an uphill section, a downhill section and a gentle section; then, the second acquisition unit can be used to acquire the filling coal mining crack rate of the target area to obtain the corresponding target speed, wherein the target area is one of the uphill section, the downhill section and the gentle section, and the target area and the target speed correspond one to one; secondly, the calculation unit can be used to calculate the maximum pushing speed of the target area corresponding to the target speed at least based on the target speed; finally, the determination unit can be used to determine the predetermined time period at least based on the predetermined pushing speed, and during the coal pushing process, the ground cracks are pushed into the ground every predetermined time period. Predetermined materials are injected into the cracks to fill the ground fissures until the mining is completed, wherein the ground fissures are formed by coal mining at a predetermined mining speed at the coal mining face, the predetermined mining speed is less than or equal to the maximum mining speed, and the predetermined materials include microbial solidification materials, which achieves the correspondence between the pressure based on the coal mining cycle and the development of coal mining ground fissures, considers the terrain factors, adopts microbial solidification for continuous repair, and combines with microbial technology with fixed sulfur ash as calcium source to better adapt to the repair of the coal mining process, and at the same time, limits the speed of coal mining, and carries out the purpose of carrying out the work under the law of mine pressure, thereby achieving the technical effect of green, high-strength, and high-permeability coal mining ground fissure repair, and improving the timeliness and accuracy of ground fissure repair.

[0088] The technical solution provided by the embodiment of the present invention solves the technical problems in the prior art of low accuracy in repairing ground fissures, unreasonable filling intervals, and lagging repair methods.

[0089] In an optional embodiment, the first acquisition unit includes: a topographic measurement subunit, which is used to perform topographic measurement on the coal mining face to obtain topographic measurement results, wherein the topographic measurement results include the elevations of multiple predetermined points and the positions of multiple predetermined points, and the predetermined point is any point on the coal mining face; a first acquisition subunit, which is used to obtain the elevation difference between two adjacent predetermined points and the slope of two adjacent predetermined points along the pushing direction of the coal mining face, and the elevation difference is the difference between the elevation of the latter predetermined point and the elevation of the former predetermined point; a first determination subunit, which is used to determine that the coal mining face corresponding to the positions of the two predetermined points is an uphill section when the elevation difference is greater than 0 and the slope is greater than a predetermined value; a second determination subunit, which is used to determine that the coal mining face corresponding to the positions of the two predetermined points is a downhill section when the elevation difference is less than 0 and the slope is greater than a predetermined value; and a third determination subunit, which is used to determine that the remaining coal mining face is a flat section.

[0090] In an optional embodiment, the second acquisition unit includes: a second acquisition subunit, used to obtain the average wind speed within the time period of the target mining area; a third acquisition subunit, used to obtain the length of time required to fill the ground cracks of unit height under the condition of average wind speed, and obtain the target speed.

[0091] In an optional embodiment, the calculation unit includes: a fourth acquisition subunit, which is used to obtain the coal seam burial depth, the development depth of the ground fissures and the coal mining crack angle of the coal mining working face; a first calculation subunit, which is used to calculate the coal mining crack angle according to the formula Calculate the maximum pushing speed Vmax, where w is the safety factor, w=0.8~0.9, h is the burial depth of the coal seam, m is the development depth of the ground fissure, and φ is the coal mining fissure angle.

[0092] In an optional embodiment, the determination unit includes: a fifth acquisition subunit, used to obtain the time length T corresponding to the cycle of the coal mining face at a predetermined pushing speed; a second calculation subunit, used to calculate according to the formula The predetermined time period t is calculated, where N is the number of times the predetermined material is injected into the ground fissure.

[0093] In an optional embodiment, the determination unit includes: an injection subunit, which is used for the injection step, injecting a predetermined material into the bottom of the ground fissure at a predetermined pressure until the liquid phase overflows, and the predetermined pressure is greater than 0.05MPa; a repetition subunit, which is used for repeating the step, repeating the injection step multiple times, and updating the mass ratio of the solid phase to the liquid phase in the predetermined material to a predetermined multiple of the mass ratio of the solid phase to the liquid phase in the predetermined material in the previous repetition process, and the predetermined multiple is greater than 1.1, until the mining is completed.

[0094] In an optional embodiment, the device for repairing coal mining ground fissures also includes: an injection unit, used to inject a predetermined proportion of a predetermined material into the bottom of the ground fissure after coal mining is completed, wherein the predetermined proportion is greater than the mass ratio of the solid phase to the liquid phase in the last predetermined material in the repeated step.

[0095] According to another aspect of an embodiment of the present invention, a processor is further provided, and the processor is used to run a program, wherein when the program is run, any one of the above-mentioned methods for repairing ground fissures caused by coal mining is executed.

[0096] According to another aspect of an embodiment of the present invention, a computer program product is provided, including a computer program, which implements the steps of any one of the above-mentioned methods for repairing ground fissures caused by coal mining when executed by a processor.

[0097] According to another aspect of an embodiment of the present invention, a computer-readable storage medium is provided, which includes a stored program, wherein when the program is running, the device where the computer-readable storage medium is located is controlled to execute any one of the above-mentioned methods for repairing coal mining ground fissures.

[0098] Optionally, in this embodiment, the computer-readable storage medium may be located in any one of the computer terminals in a computer terminal group in a computer network, or in any one of the communication devices in a communication device group.

[0099] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for executing the following steps: obtaining the terrain of the coal mining face, wherein the terrain includes an uphill section, a downhill section and a gentle section; obtaining the filling rate of coal mining cracks in the target area to obtain a corresponding target speed, wherein the target area is one of the uphill section, the downhill section and the gentle section, and the target area corresponds to the target speed one by one; calculating the maximum mining speed of the target area corresponding to the target speed at least based on the target speed; determining a predetermined time period at least based on a predetermined mining speed, and during the coal mining process, injecting a predetermined material into the ground cracks every predetermined time period to fill the ground cracks until the mining is completed, wherein the ground cracks are formed by the coal mining face mining at a predetermined mining speed, the predetermined mining speed is less than or equal to the maximum mining speed, and the predetermined material includes a microbial solidification material.

[0100] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for executing the following steps: performing a topographic survey on the coal mining face to obtain a topographic survey result, the topographic survey result including the elevations of a plurality of predetermined points and the positions of a plurality of predetermined points, where the predetermined point is any point on the coal mining face; obtaining the elevation difference between two adjacent predetermined points and the slope of two adjacent predetermined points along the pushing and mining direction of the coal mining face, the elevation difference being the difference between the elevation of the latter predetermined point and the elevation of the former predetermined point; when the elevation difference is greater than 0 and the slope is greater than a predetermined value, determining that the coal mining face corresponding to the positions of the two predetermined points is an uphill section; when the elevation difference is less than 0 and the slope is greater than a predetermined value, determining that the coal mining face corresponding to the positions of the two predetermined points is a downhill section; and the remaining coal mining faces are flat sections.

[0101] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for executing the following steps: obtaining the average wind speed within a time period of the target mining area; obtaining the length of time required to fill a ground fissure of unit height under the condition of average wind speed, and obtaining a target speed.

[0102] Optionally, in this embodiment, the computer-readable storage medium is configured to store program codes for executing the following steps: obtaining the coal seam burial depth, the development depth of the ground fissures, and the coal mining fissure angle of the coal mining face; according to the formula Calculate the maximum pushing speed Vmax, where w is the safety factor, w=0.8~0.9, h is the burial depth of the coal seam, m is the development depth of the ground fissure, and φ is the coal mining fissure angle.

[0103] Optionally, in this embodiment, the computer-readable storage medium is configured to store program codes for executing the following steps: obtaining a period T corresponding to the period of pressing of the coal mining face at a predetermined pushing speed; calculating the period T according to the formula The predetermined time period t is calculated, where N is the number of times the predetermined material is injected into the ground fissure.

[0104] Optionally, in this embodiment, the computer-readable storage medium is configured to store program codes for executing the following steps: an injection step, injecting a predetermined material into the bottom of the ground fissure at a predetermined pressure until the liquid phase overflows, and the predetermined pressure is greater than 0.05 MPa; a repeating step, repeating the injection step multiple times, and in the repeated process updating the mass ratio of the solid phase to the liquid phase in the predetermined material to a predetermined multiple of the mass ratio of the solid phase to the liquid phase in the predetermined material in the last repeated process, the predetermined multiple being greater than 1.1, until the mining is completed.

[0105] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: injecting a predetermined proportion of a predetermined material into the bottom of the ground fissure, wherein the predetermined proportion is greater than the mass ratio of the solid phase to the liquid phase in the last predetermined material in the repeated steps.

[0106] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0107] In the above embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0108] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the above-mentioned units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0109] The units described above 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 on multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0110] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0111] If the above-mentioned integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the above-mentioned methods of each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk and other media that can store program codes.

[0112] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for repairing coal mining ground fissures, characterized in that: include: Acquire the topography of the coal mining face, wherein the topography includes an uphill section, a downhill section, and a flat section; Acquire the filling coal mining crack rate of the target area to obtain a corresponding target speed, wherein the target area is one of the uphill section, the downhill section and the gentle section, and the target area corresponds to the target speed one by one; At least according to the target speed, calculating the maximum pushing and mining speed of the target area corresponding to the target speed; At least according to the predetermined mining speed, a predetermined time period is determined, and during the coal mining process, a predetermined material is injected into the ground fissures to fill the ground fissures every the predetermined time period until the mining is completed, wherein the ground fissures are formed when the coal mining face mines coal at the predetermined mining speed, the predetermined mining speed is less than or equal to the maximum mining speed, and the predetermined material includes a microbial solidification material.

2. The method according to claim 1, characterized in that Obtain the topography of the coal mining face, including: Performing topographic measurement on the coal mining face to obtain topographic measurement results, wherein the topographic measurement results include elevations of a plurality of predetermined points and positions of the plurality of predetermined points, wherein the predetermined point is any point on the coal mining face; Acquire the elevation difference between two adjacent predetermined points and the slope of two adjacent predetermined points along the pushing and mining direction of the coal mining working face, wherein the elevation difference is the difference between the elevation of the latter predetermined point and the elevation of the former predetermined point; When the elevation difference is greater than 0 and the slope is greater than a predetermined value, determining that the coal mining working face corresponding to the positions of the two predetermined points is the uphill section; When the elevation difference is less than 0 and the slope is greater than a predetermined value, determining that the coal mining working face corresponding to the positions of the two predetermined points is the downhill section; The remaining coal mining working face is the flat section.

3. The method according to claim 1, characterized in that Obtain the filling coal mining crack rate in the target area and obtain the corresponding target speed, including: Obtaining the average wind speed in the target area during the period of time; The target speed is obtained by obtaining the time length required to fill the ground fissure of unit height under the condition of the average wind speed.

4. The method according to claim 1, characterized in that: At least according to the target speed, calculating the maximum pushing and mining speed of the target area corresponding to the target speed includes: Obtaining the buried depth of the coal seam, the development depth of the ground fissures, and the coal mining fissure angle of the coal mining working face; According to the formula The maximum pushing and mining speed Vmax is calculated, wherein w is the safety factor, w=0.8-0.9, h is the burial depth of the coal seam, m is the development depth of the ground fissure, and φ is the coal mining fissure angle.

5. The method according to claim 1, characterized in that: The scheduled time period is determined based at least on the scheduled procurement speed, including: Obtaining a time length T corresponding to the period of pressing the coal mining face at the predetermined pushing and mining speed; According to the formula The predetermined time period t is calculated, wherein N is the number of times the predetermined material is injected into the ground fissure.

6. The method according to claim 1, characterized in that The microbial solidification material includes a solid phase and a liquid phase. During the coal mining process, the predetermined material is injected into the ground fissure every predetermined time period to fill the ground fissure until the mining is completed, including: an injection step, injecting the predetermined material into the bottom of the ground fissure at a predetermined pressure until the liquid phase overflows, wherein the predetermined pressure is greater than 0.05 MPa; Repeating step, repeating the injection step multiple times, and in the repetitive process updating the mass ratio of the solid phase to the liquid phase in the predetermined material to a predetermined multiple of the mass ratio of the solid phase to the liquid phase in the predetermined material in the last repetitive process, wherein the predetermined multiple is greater than 1.1, until the extraction is completed.

7. The method according to claim 6, characterized in that After coal mining is completed, the method further comprises: A predetermined proportion of the predetermined material is injected into the bottom of the ground fissure, wherein the predetermined proportion is greater than the mass ratio of the solid phase to the liquid phase in the predetermined material for the last time in the repeated step.

8. A device for repairing ground fissures in coal mining, characterized in that: include: A first acquisition unit is used to acquire the topography of the coal mining face, wherein the topography includes an uphill section, a downhill section, and a flat section; A second acquisition unit is used to acquire the filling coal mining crack rate of the target area to obtain a corresponding target speed, wherein the target area is one of the uphill section, the downhill section and the gentle section, and the target area corresponds to the target speed one by one; a calculation unit, configured to calculate, at least according to the target speed, a maximum pushing and mining speed of the target area corresponding to the target speed; A determination unit is used to determine a predetermined time period based on at least a predetermined mining speed, and during the coal mining process, inject a predetermined material into the ground fissures to fill the ground fissures every the predetermined time period until the mining is completed, wherein the ground fissures are formed when the coal mining face mines coal at the predetermined mining speed, the predetermined mining speed is less than or equal to the maximum mining speed, and the predetermined material includes a microbial solidification material.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a stored program, wherein when the program is executed, the device where the computer-readable storage medium is located is controlled to execute the method according to any one of claims 1 to 7.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

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