Goaf filling method and device, electronic equipment and storage medium

Abstract

The invention discloses a goaf filling method and device, electronic equipment and a storage medium. The method belongs to the field of mining engineering and comprises the steps that a contour topographic map of a goaf and the buried depth of a coal seam in the goaf are obtained, and the contour topographic map is used for reflecting the valley fall of different positions in the goaf; based on the contour topographic map and the buried depth, determining a dangerous area included in the goaf and a dangerous level corresponding to the dangerous area, the probability of caving in the dangerous area being greater than or equal to a preset probability; based on the danger level, performing filling simulation on the dangerous area according to a plurality of preset filling rates so as to determine a target filling rate from the plurality of preset filling rates; and filling the dangerous area based on the target filling rate. The technical problem that the effect of preventing and treating rock burst in the related technology is poor is solved.

Description

Technical Field

[0001] The present invention relates to the field of mining engineering, and in particular to a method and device for filling a goaf, electronic equipment, and a storage medium. Background Art

[0002] During coal mining, rock burst is one of the major disasters. It has complex causes and is difficult to predict and prevent. It seriously threatens the safe production of mines and the lives of personnel. The occurrence of rock burst is closely related to geological structure, mining method, roof conditions and ground stress state. During the mining process, geological features of the surface environment such as valleys, rivers, faults, etc. may affect the mechanical environment of underground coal mining, resulting in rock burst.

[0003] At present, the prevention and control of rock burst mainly relies on the mining control technology inside the mine, which is not enough to comprehensively deal with the problem of rock burst. It is urgent to develop more effective prevention and control strategies to adapt to the complex and changeable geological conditions in mining areas and ensure safe mining in mines.

[0004] To address the above-mentioned problems, no effective solution has been proposed yet. Summary of the invention

[0005] The embodiments of the present invention provide a method and device for filling a goaf, an electronic device, and a storage medium, so as to at least solve the technical problem that the related technologies are poorly effective in preventing and controlling rock burst.

[0006] According to one aspect of an embodiment of the present invention, a method for filling a goaf is provided, comprising: obtaining a contour map of the goaf and the burial depth of the coal seam in the goaf, wherein the contour map is used to reflect the valley drop at different locations in the goaf; based on the contour map and the burial depth, determining the dangerous areas contained in the goaf and the danger levels corresponding to the dangerous areas, wherein the probability of collapse in the dangerous areas is greater than or equal to a preset probability; based on the danger level, performing filling simulation on the dangerous areas according to multiple preset filling rates to determine a target filling rate from the multiple preset filling rates; and filling the dangerous areas based on the target filling rate.

[0007] Furthermore, based on the contour map and the burial depth, the dangerous areas contained in the goaf and the danger levels corresponding to the dangerous areas are determined, including: dividing the goaf based on the contour map to obtain multiple initial areas, wherein the valley drops of different initial areas are different; determining the target area and the area type of the target area from the multiple initial areas based on the valley drops corresponding to the multiple initial areas, wherein the valley drop of the target area is greater than a preset drop threshold; obtaining the historical resistance curve of the support in the target area, wherein the support is used to support the rock structure of the target area; determining the dangerous area and the danger level from the target area based on the historical resistance curve, the area type and the burial depth.

[0008] Furthermore, based on the historical resistance curve, area type and burial depth, the dangerous area and the danger level are determined from the target area, including: determining the maximum working resistance of the bracket based on the historical resistance curve; determining the dangerous area from the target area based on the maximum working resistance; obtaining at least one burial depth threshold matching the area type; determining the danger level of the dangerous area based on the burial depth and at least one burial depth threshold.

[0009] Furthermore, a dangerous area is determined from the target area based on the maximum working resistance, including: evaluating the degree of danger of the target area based on the maximum working resistance to obtain a danger index of the target area; in response to the danger index being greater than or equal to a preset index, determining the target area as a dangerous area.

[0010] Furthermore, based on the hazard level, a filling simulation is performed on the hazardous area according to multiple preset filling rates to determine a target filling rate from the multiple preset filling rates, including: based on the hazard level, selecting multiple initial filling rates from the multiple preset filling rates; based on the multiple initial filling rates, a filling simulation is performed on the hazardous area to obtain multiple filling results, wherein different filling results are used to characterize the safety level of a process of filling the hazardous area using the corresponding initial filling rate; based on the multiple filling results, a target filling rate is selected from the multiple initial filling rates, wherein the safety level corresponding to the target filling rate is greater than or equal to the safety level of other filling rates among the multiple initial filling rates except the target filling rate.

[0011] Furthermore, based on the danger level, multiple initial fill rates are selected from multiple preset fill rates, including: obtaining historical fill records corresponding to the danger level, wherein the historical fill records at least include historical fill rates; in response to successfully obtaining the historical fill records, based on the filling rate range in which the historical fill rates are located, selecting multiple initial fill rates from multiple preset fill rates; in response to unsuccessful acquisition of the historical fill records, determining the multiple preset fill rates as multiple initial fill rates.

[0012] Furthermore, a filling simulation is performed on the dangerous area based on multiple initial filling rates to obtain multiple filling results, including: analyzing the geometric structure of the dangerous area to determine the vertical slices of the dangerous area; filling simulation is performed on the dangerous area based on multiple initial filling rates, and multiple stress concentration levels corresponding to the vertical slices during the simulation process are determined; and multiple filling results are constructed based on the multiple stress concentration levels.

[0013] According to another aspect of an embodiment of the present invention, a goaf filling device is also provided, including: a parameter acquisition module, used to obtain a contour map of the goaf and the burial depth of the coal seam in the goaf, wherein the contour map is used to reflect the valley drop at different positions in the goaf; an area determination module, used to determine the dangerous areas contained in the goaf and the danger levels corresponding to the dangerous areas based on the contour map and the burial depth, wherein the probability of collapse in the dangerous areas is greater than or equal to a preset probability; a filling rate determination module, used to perform filling simulation on the dangerous areas according to multiple preset filling rates based on the danger level, so as to determine the target filling rate from the multiple preset filling rates; an area filling module, used to fill the dangerous areas based on the target filling rate.

[0014] According to another aspect of an embodiment of the present invention, there is further provided an electronic device, comprising: a memory storing an executable program; and a processor for running the program, wherein the method in each embodiment of the present invention is executed when the program is running.

[0015] According to another aspect of an embodiment of the present invention, a computer-readable storage medium is provided. The computer-readable storage medium includes a stored executable program, wherein when the executable program is running, the device where the computer-readable storage medium is located is controlled to execute the methods in various embodiments of the present invention.

[0016] According to another aspect of an embodiment of the present invention, a computer program product is provided, including a computer program. When the computer program is executed by a processor, the method in each embodiment of the present invention is implemented.

[0017] According to another aspect of an embodiment of the present invention, a computer program product is provided, including a non-volatile computer-readable storage medium, wherein the non-volatile computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method in each embodiment of the present invention is implemented.

[0018] According to another aspect of the embodiments of the present invention, a computer program is further provided. When the computer program is executed by a processor, the methods in the embodiments of the present invention are implemented.

[0019] In an embodiment of the present invention, a contour map of a goaf and the burial depth of coal seams in the goaf are obtained; based on the contour map and the burial depth, the dangerous areas contained in the goaf and the danger levels corresponding to the dangerous areas are determined; based on the danger level, a filling simulation is performed on the dangerous areas according to a plurality of preset filling rates to determine a target filling rate from a plurality of preset filling rates; the dangerous areas are filled based on the target filling rate, and an accurate theoretical basis is provided for the filling strategy by dividing different dangerous areas and danger levels, so that the filling system can formulate more accurate filling strategies for dangerous areas of different levels, thereby achieving the purpose of effectively preventing and controlling rock burst disasters, thereby realizing the technical effect of improving the safety of coal mining, and further solving the technical problem that the related technologies are less effective in preventing and controlling rock burst. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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:

[0021] Figure 1 is a flow chart of a method for filling a goaf according to an embodiment of the present invention;

[0022] Figure 2 is a historical resistance curve variation diagram of an optional bracket according to an embodiment of the present invention;

[0023] Figure 3 is an optional schematic diagram of the division of Class I gully danger zones according to an embodiment of the present invention;

[0024] Figure 4 is a detailed flow chart of a method for filling a goaf according to an embodiment of the present invention;

[0025] Figure 5 is a schematic diagram of a goaf filling device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0026] 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.

[0027] 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.

[0028] According to an embodiment of the present invention, an embodiment of a method for filling a goaf 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.

[0029] Figure 1 is a flow chart of a method for filling a goaf according to an embodiment of the present invention. Figure 1 As shown, the method comprises the following steps:

[0030] Step S102, obtaining a contour map of the goaf and the buried depth of the coal seam in the goaf, wherein the contour map is used to reflect the valley drop at different locations in the goaf.

[0031] The above-mentioned contour map may be a map showing the topographic changes of a specific area on the surface or underground. The above-mentioned burial depth may refer to the vertical distance from the rock layer above the coal seam to the surface. The valley drop may be the difference in ground height on both sides of the valley.

[0032] In an optional embodiment, considering that the large drop valleys on the surface will affect the distribution of underground stress, especially the rock pressure above the coal seam, the contour map can help analysts identify which goafs may be affected by the concentration of valley stress, thereby increasing the possibility of rock burst. In addition, shallow coal seams are more susceptible to changes in surface geological structures, while deep coal seams may increase the risk of rock burst due to increased ground stress. Therefore, the goaf filling system (hereinafter referred to as the filling system) can obtain the contour map of the goaf based on ground measurement technology, so as to further analyze the valley drop at different locations in the goaf. In addition, considering that the burial depth of the coal seam directly affects the pressure of the rock layer, that is, the vertical load on the coal seam, which has a key impact on the division of dangerous areas, the filling system can also obtain the burial depth of the coal seam in the goaf based on drilling and geological exploration.

[0033] For example, in order to obtain the geographical characteristics of the goaf and prevent the occurrence of safety accidents in the goaf, the staff can set several control points around and inside the goaf. These control points should include elevation reference points and coordinate points, use GPS (Global Positioning System) receivers to determine the precise coordinates and elevations of the control points, and use a total station to record the elevation and coordinate information of each point. The staff can import the data measured on site into the filling system. The filling system can include a pre-trained mapping model, which can generate a contour topographic map of the goaf based on the above-mentioned measured data, thereby further analyzing the valley drop at different locations in the goaf. In addition, the filling system can determine the location of the borehole based on geological data and preliminary topographic maps. The staff can use professional drilling rigs to perform drilling construction based on the above-mentioned location, and complete the drilling one by one according to the preset depth and location. Then, the staff can import the drilling data, rock sample test results and geological observation records into the filling system. The filling system can conduct a comprehensive analysis of the above-mentioned imported data to determine the burial depth of the coal seam, the continuity and stability of the coal seam, and the relationship between the coal seam and the rock layer.

[0034] In another optional embodiment, considering the complexity of the geographical environment of the goaf, it may be difficult for traditional surveying methods to obtain accurate geographical information. Therefore, the filling system can obtain the contour topographic map of the goaf based on drone aerial photography technology. The filling system can also obtain the buried depth of the coal seam in the goaf based on seismic exploration.

[0035] For example, the staff can select a drone with a high-resolution camera and a lidar system, control the drone to fly along a preset route, and collect ground elevation data and images. Then, the staff can import the collected images and lidar data into the filling system, which can splice the images to generate an orthophoto map. At the same time, the lidar data can be processed into a point cloud to generate a digital elevation model, thereby constructing a contour map of the goaf. Based on the contour map, the valley drop at different locations in the goaf can be further analyzed. In addition, the staff can prepare seismic exploration equipment in advance and excite seismic waves at the preset source point location. When the seismic wave encounters an interface with different densities or elastic constants underground, different reflection waves and refraction waves will be generated. Then, the staff can import the recorded reflection waves and refraction waves into the filling system, and the filling system can analyze the imported data to determine the burial depth of the coal seam in the goaf.

[0036] Step S104, based on the contour map and the burial depth, determine the dangerous areas included in the goaf and the danger levels corresponding to the dangerous areas, wherein the probability of collapse in the dangerous areas is greater than or equal to a preset probability.

[0037] The above-mentioned dangerous area may be an area where the probability of an accident occurring in the above-mentioned goaf is relatively high. The above-mentioned danger level may be the level of possibility and severity of an accident occurring in the above-mentioned dangerous area. The above-mentioned preset probability may be the probability of a collapse event that may occur evaluated based on historical data, geological analysis, engineering experience, numerical simulation and other methods.

[0038] In an optional embodiment, considering that failure to accurately identify dangerous areas may lead to insufficient safety measures, especially in areas prone to disasters such as rock burst, gas explosion, water disaster, rock collapse, etc., accurate classification of dangerous areas and danger levels helps to improve work safety in goafs. As shown above, given that parameters such as the valley drop in different areas of the goaf, the burial depth of the coal seam, etc., will affect the degree of danger of different areas in the goaf, the staff can determine the dangerous areas contained in the goaf and the corresponding danger levels of the dangerous areas based on the above-mentioned contour map and the above-mentioned burial depth.

[0039] For example, in order to more accurately divide the dangerous areas, the filling system can first set a preset probability of collapse based on the geographical characteristics of the goaf, and then the filling system can determine the distribution, direction, width and depth of the surface valleys based on the above-mentioned contour map and the above-mentioned burial depth. Furthermore, the filling system can analyze the impact of the above-mentioned different characteristics on the danger of rock burst based on geomechanics and rock burst theory, and evaluate the probability and severity of collapse in different areas. Finally, the filling system can divide multiple areas where the probability of collapse is greater than the above-mentioned preset probability into multiple dangerous areas, and divide the above-mentioned multiple dangerous areas into multiple dangerous levels according to the severity levels of the above-mentioned multiple dangerous areas.

[0040] Specifically, the above preset probability may be 10%, the probability of collapse in area A may be 20%, the probability of collapse in area B may be 5%, the probability of collapse in area C may be 11%, and the probability of collapse in area D may be 15%. The severity of collapse accidents in the above areas may be as follows:

[0041] Region B<Region C<Region D<Region A.

[0042] At this time, based on the above preset probability, area A, area C, and area D can be divided into dangerous areas. Based on the severity of the above dangerous areas, the danger levels of the above dangerous areas are further determined as follows:

[0043] Area C<Area D<Area A.

[0044] Step S106 , based on the danger level, performing filling simulation on the danger area according to a plurality of preset filling rates, so as to determine a target filling rate from the plurality of preset filling rates.

[0045] The preset filling rate may be a filling ratio for evaluating and comparing the effects of different filling strategies on the stability of the goaf. The target filling rate may refer to a filling ratio that can more accurately control the stability of the rock formation above the goaf.

[0046] In an optional embodiment, considering that areas with different danger levels have different filling requirements, blindly using a high filling rate may cause resource waste and economic burden, while an insufficient filling rate may reduce the safety of operations in the goaf. Therefore, the filling system can perform filling simulation on the above-mentioned dangerous areas according to multiple preset filling rates based on the above-mentioned danger levels, and can determine the target filling rate from multiple preset filling rates based on the results of the above-mentioned filling simulation.

[0047] For example, in order to improve the matching degree between areas with different danger levels and the filling rate, the filling system can preliminarily set the filling rate range from 30% to 80% based on safety regulations and rock formation characteristics, and select five key points as preset filling rates: 30%, 40%, 50%, 60%, 70%, 80%. Then, the filling system can perform filling simulation on the above preset filling rates based on the pre-trained artificial intelligence model. Finally, the filling system determines the reasonable filling rate of each dangerous area based on the simulation results, and the reasonable filling rate can be used as the above target filling rate.

[0048] It should be noted that the selection of the above preset filling rate is only for illustrative purposes and is not limited here.

[0049] Step S108, filling the dangerous area based on the target filling rate.

[0050] In an optional embodiment, taking into account that the target filling rate is set for dangerous areas of different hazard levels, filling the dangerous areas based on the target filling rate can reduce the uncertainty and risk in mining and improve mining efficiency. At the same time, it can ensure the safety of mining activities, avoid shutdowns and accidents caused by mining disasters such as rock burst, and protect the lives of mine workers.

[0051] For example, the filling system can determine that the target filling rate of hazardous area A is 50%. Based on the above target filling rate, the staff can use dry stack filling technology to fill hazardous area A. At the same time, the filling system can monitor the filling process in real time to ensure uniform filling without voids.

[0052] It should be noted that the selection of the above target filling rate is only for illustrative purposes and is not intended to be limiting.

[0053] In an embodiment of the present invention, a contour map of a goaf and the burial depth of coal seams in the goaf are obtained; based on the contour map and the burial depth, the dangerous areas contained in the goaf and the danger levels corresponding to the dangerous areas are determined; based on the danger level, a filling simulation is performed on the dangerous areas according to a plurality of preset filling rates to determine a target filling rate from a plurality of preset filling rates; the dangerous areas are filled based on the target filling rate, and an accurate theoretical basis is provided for the filling strategy by dividing different dangerous areas and danger levels, so that the filling system can formulate more accurate filling strategies for dangerous areas of different levels, thereby achieving the purpose of effectively preventing and controlling rock burst disasters, thereby realizing the technical effect of improving the safety of coal mining, and further solving the technical problem that the related technologies are less effective in preventing and controlling rock burst.

[0054] Furthermore, based on the contour map and the burial depth, the dangerous areas contained in the goaf and the danger levels corresponding to the dangerous areas are determined, including: dividing the goaf based on the contour map to obtain multiple initial areas, wherein the valley drops of different initial areas are different; determining the target area and the area type of the target area from the multiple initial areas based on the valley drops corresponding to the multiple initial areas, wherein the valley drop of the target area is greater than a preset drop threshold; obtaining the historical resistance curve of the support in the target area, wherein the support is used to support the rock structure of the target area; determining the dangerous area and the danger level from the target area based on the historical resistance curve, the area type and the burial depth.

[0055] The above-mentioned initial area can be an area divided based on the valley drop characterized by the above-mentioned contour map. The above-mentioned target area can be an area where the valley drop is greater than the above-mentioned preset threshold. The above-mentioned area type can be an area category divided according to different valley drops. The above-mentioned preset drop threshold can be pre-set and used to determine the valley drop value of the above-mentioned target area. The above-mentioned support can be a device or structure to prevent the collapse of roof rocks, for example, it can be a wooden support, a metal support, a hydraulic support, but not limited to this. The above-mentioned historical resistance curve can be a curve that records the maximum working resistance that the above-mentioned support is borne during work and changes with time and mining progress.

[0056] In an optional embodiment, considering that inaccurate classification of danger levels may lead to misjudgment of the early warning system, it is impossible to provide effective warnings before disasters occur, and miss the effective opportunity to avoid risks. Therefore, the filling system can first divide the goaf based on the valley drop represented by the contour map to obtain multiple initial areas. Then, based on the valley drops corresponding to the multiple initial areas, the filling system can determine the area in the above-mentioned multiple initial areas where the valley drop is greater than the above-mentioned preset drop threshold as the target area, and at the same time, confirm the area type of the above-mentioned target area. Finally, the filling system can obtain the historical resistance curve of the support in the above-mentioned target area, and can determine the dangerous area and danger level from the target area based on the historical resistance curve, area type and burial depth.

[0057] For example, the preset drop threshold may be 100m, and the support may be a wooden support. In order to accurately divide dangerous areas and danger levels, the filling system may first divide the goaf based on the valley drop represented by the contour map to obtain five initial areas: Area A, with a valley drop of 50m; Area B, with a valley drop of 120m; Area C, with a valley drop of 130m; and Area D, with a valley drop of 102m. Then, the filling system may determine Area B, Area C, and Area D as target areas based on the preset drop threshold. Since the valley drop in Area C is relatively large, the filling system may classify Area C into Category I. The valley drop in Area D is relatively small, and the filling system may classify Area D into Category III, and classify Area B into Category II. Subsequently, the filling system may obtain the historical resistance curves of the wooden supports in Area B, Area C, and Area D. For ease of understanding, Figure 2 is a historical resistance curve variation diagram of an optional support according to an embodiment of the present invention, such as Figure 2 As shown, the horizontal axis represents the burial depth (burial depth), and the vertical axis represents the working resistance of the bracket, and the unit is KN (kilonewton). Among them, the bracket working resistance of Class I valley is higher, the bracket working resistance of Class II valley is second only to Class I, and the bracket working resistance of Class I valley is lower than Class II. The bracket working resistance of the above three types of valleys decreases with the increase of burial depth. Based on the above historical resistance curve, area type and burial depth, the filling system can determine that area C and area B are dangerous areas. Since the bracket working resistance in area C is higher, the filling system can classify area C as a high-risk level and area B as a low-risk level.

[0058] It should be noted that the selection of the above-mentioned preset drop threshold, valley drop and other values ​​is only for illustrative purposes. The staff can set them according to actual conditions and are not limited here.

[0059] Furthermore, based on the historical resistance curve, area type and burial depth, the dangerous area and the danger level are determined from the target area, including: determining the maximum working resistance of the bracket based on the historical resistance curve; determining the dangerous area from the target area based on the maximum working resistance; obtaining at least one burial depth threshold matching the area type; determining the danger level of the dangerous area based on the burial depth and at least one burial depth threshold.

[0060] The maximum working resistance may be a larger value among the resistance values ​​of the support in the historical resistance curve. The burial depth threshold may be a specific depth value for distinguishing the stability of geological structures or rock layers at different depths.

[0061] In an optional embodiment, considering that the maximum working resistance of the support is the load limit it can withstand under certain conditions, this indicator directly reflects the pressure state of the top rock layer. Therefore, by monitoring and analyzing the changes in the maximum working resistance of the support, the stability of the rock layer in the area and the possibility and intensity of rock burst can be evaluated, so that the filling system can accurately determine the dangerous area. In addition, considering that different burial depths can distinguish the pressure characteristics of rock layers at different depths, thereby identifying areas with higher rock burst risks, the filling system can determine the danger level of the dangerous area based on the above burial depth and one less burial depth threshold.

[0062] For example, in order to accurately determine the dangerous areas and accurately classify the danger levels of the above-mentioned dangerous areas, the filling system can first analyze the historical resistance curves of the above-mentioned supports, and the analysis shows that the maximum working resistance of the supports in areas A, B and C is relatively high. Since high working resistance indicates high rock pressure and high risk of rock burst, the filling system can determine the above-mentioned areas A, B and C as dangerous areas, and further classify area A into Class I, area B into Class II, and area C into Class III, where the lower limit of the burial depth threshold of Class I can be 300m. The lower limit of the burial depth threshold of Class II can be 200m, and the upper limit can be 300m. The lower limit of the burial depth threshold of Class III can be 100m, and the upper limit can be 200m. The burial depth of the above-mentioned area A is 150m, the burial depth of area B is 380m, and the burial depth of area C is 220m. Combined with the burial depth thresholds of the above-mentioned categories, the filling system can determine that the danger level of area A is a low-risk level, the danger level of area B is a high-risk level, and the danger level of area C is a medium-risk level.

[0063] It should be noted that the selection of the above-mentioned burial depth threshold, burial depth and other numerical values ​​is only for exemplary display. The staff can set them according to the actual situation and are not limited here.

[0064] Furthermore, a dangerous area is determined from the target area based on the maximum working resistance, including: evaluating the degree of danger of the target area based on the maximum working resistance to obtain a danger index of the target area; in response to the danger index being greater than or equal to a preset index, determining the target area as a dangerous area.

[0065] The above-mentioned danger level can be determined based on the size of the above-mentioned maximum working resistance, and the possibility or severity of the collapse disaster. The above-mentioned danger index can be an index that characterizes the danger level of the target area. The above-mentioned preset index can be a pre-set danger index used to determine whether the current area is a dangerous area.

[0066] In an optional embodiment, if the high-pressure area under the valley is not discovered in time and effective measures are not taken, surface settlement, cracks and other phenomena may increase, further increasing the risk of collapse in the goaf. Therefore, it is necessary to evaluate the degree of danger of the above-mentioned target area as accurately as possible. The filling system can first evaluate the degree of danger of the target area based on the maximum working resistance, and the evaluation result can be used as a danger index of the target area. Then, the filling system can determine the area with a danger index greater than or equal to the preset index as a dangerous area.

[0067] For example, the above-mentioned preset index may be 5000KN. The filling system has obtained the maximum working resistance of the above-mentioned bracket. In order to determine the dangerous area as accurately as possible, the filling system may evaluate the degree of danger of the target area based on the above-mentioned maximum working resistance. The evaluation results show that the danger index of area A is 6000KN, the danger index of area B is 3000KN, and the danger index of area C is 8000KN. Since the danger indicators of area A and area C are greater than the above-mentioned preset indicators, the filling system may determine area A and area C as dangerous areas.

[0068] It should be noted that the selection of the above-mentioned preset indicators, danger indicators and other numerical values ​​is only for illustrative purposes. The staff can set them according to the actual situation and there is no limitation here.

[0069] Furthermore, based on the hazard level, a filling simulation is performed on the hazardous area according to multiple preset filling rates to determine a target filling rate from the multiple preset filling rates, including: based on the hazard level, selecting multiple initial filling rates from the multiple preset filling rates; based on the multiple initial filling rates, a filling simulation is performed on the hazardous area to obtain multiple filling results, wherein different filling results are used to characterize the safety level of a process of filling the hazardous area using the corresponding initial filling rate; based on the multiple filling results, a target filling rate is selected from the multiple initial filling rates, wherein the safety level corresponding to the target filling rate is greater than or equal to the safety level of other filling rates among the multiple initial filling rates except the target filling rate.

[0070] The initial filling rate may be a preset filling rate adapted to the danger level. The filling result may be a simulation result obtained by simulating the filling of the danger zone based on the initial filling rate. The safety level may be the safety level after the danger zone is filled.

[0071] In an optional embodiment, it is considered that a lower filling rate may not be able to effectively control the rock formation pressure, resulting in rock formation stress concentration, increasing the probability of rock burst, roof collapse, rock burst and other safety accidents. Therefore, the filling system can first select multiple initial filling rates from multiple preset filling rates based on the danger level, and can perform filling simulation on the dangerous area based on the multiple initial filling rates to obtain multiple filling results. The above multiple filling results show the effect of the above multiple filling rates on improving the safety of the dangerous area. Then, the filling system can select a filling rate with a relatively high degree of safety from multiple initial filling rates based on the multiple filling results, and the filling rate can be used as the above target filling rate.

[0072] For example, the preset filling rate can be 0-100%. In order to ensure the safety of the dangerous area after filling, the filling system can first select the following multiple initial filling rates from the preset filling rates: 30%, 40%, and 50%. Then, the filling system can perform filling simulation on the dangerous area based on the multiple initial filling rates to obtain multiple filling results. The multiple filling simulation results show that when the filling rate is 50%, the safety of the dangerous area after filling is greater than other filling rates. Therefore, the filling system can determine 50% as the target filling rate.

[0073] It should be noted that the selection of the above initial filling rate is only for illustrative purposes. The staff can set it according to the actual situation and it is not limited here.

[0074] Furthermore, based on the danger level, multiple initial fill rates are selected from multiple preset fill rates, including: obtaining historical fill records corresponding to the danger level, wherein the historical fill records at least include historical fill rates; in response to successfully obtaining the historical fill records, based on the filling rate range in which the historical fill rates are located, selecting multiple initial fill rates from multiple preset fill rates; in response to unsuccessful acquisition of the historical fill records, determining the multiple preset fill rates as multiple initial fill rates.

[0075] The above historical filling records may be historical data and information records of filling operations for goaf areas. The above historical filling rate may be the proportion of filling materials or the degree of filling used for a specific area or a specific type of geological conditions. The above filling rate range may be a range that limits the size of the above filling rate, for example, it may be 0-100%, but is not limited thereto.

[0076] In an optional embodiment, considering that too high or too low filling rates may affect the stability of the rock formation, a correctly selected filling rate can achieve a better support effect, thereby improving the operational safety of the goaf and avoiding unnecessary waste of resources. Therefore, the filling system can first obtain the historical filling records corresponding to the hazard level, and the above historical filling records at least include the historical filling rates. If the filling system successfully obtains the above historical filling records, the filling system can select multiple initial filling rates from multiple preset filling rates based on the filling rate range of the historical filling rates. If the filling system does not successfully obtain the above historical filling records, the filling system can determine multiple preset filling rates as multiple initial filling rates.

[0077] For example, the above-mentioned multiple preset filling rates may be 35%, 60%, 65%, 70%, and 90%. In order to select a suitable initial filling rate, the filling system successfully obtains the historical filling records corresponding to the above-mentioned danger levels, and then the filling system may further obtain the above-mentioned historical filling rates, and the filling range of the historical filling rates may be 40%-80%. Then, the filling system may select 60%, 65%, and 70% from the above-mentioned multiple preset filling rates as the above-mentioned multiple initial filling rates based on the above-mentioned filling rate range.

[0078] For another example, the plurality of preset filling rates may be 45%, 50%, 55%, 60%, and 50%. If the filling system fails to successfully obtain the historical filling records corresponding to the danger level, the filling system may determine the plurality of preset filling rates as the plurality of initial filling rates. In this case, the plurality of initial filling rates are 45%, 50%, 55%, 60%, and 50%.

[0079] It should be noted that the selection of the above preset filling rate is only for illustrative purposes. The staff can set it according to the actual situation and it is not limited here.

[0080] Furthermore, a filling simulation is performed on the dangerous area based on multiple initial filling rates to obtain multiple filling results, including: analyzing the geometric structure of the dangerous area to determine the vertical slices of the dangerous area; filling simulation is performed on the dangerous area based on multiple initial filling rates, and multiple stress concentration levels corresponding to the vertical slices during the simulation process are determined; and multiple filling results are constructed based on the multiple stress concentration levels.

[0081] The geometric structure may be the shape, size and position relationship of the dangerous area in three-dimensional space. The vertical slice may be a two-dimensional cross-sectional view of the dangerous area along a specific vertical direction. The stress concentration degree may be.

[0082] In an optional embodiment, considering that an improper filling rate may aggravate stress concentration and increase the probability and intensity of rock burst, it is necessary to perform a filling simulation to identify stress concentration areas and optimize the filling rate, thereby effectively preventing rock burst. The filling system can first analyze the geometric structure of the above-mentioned dangerous area and determine the vertical slices of the dangerous area. Then, the filling system can perform a filling simulation on the dangerous area based on multiple initial filling rates, and determine multiple stress concentration levels corresponding to the vertical slices during the simulation. Finally, the filling system can construct multiple filling results based on multiple stress concentration levels.

[0083] For example, in order to improve the filling effect and ensure the safety of mine production and workers, the filling system can construct a three-dimensional geomechanical model of the above-mentioned dangerous areas, including surface topography, goaf, different types of valleys and rock structures, and can further obtain vertical slices of the above-mentioned dangerous areas. Then, the filling system can apply different filling rate schemes to the model, and simulate each filling rate in different dangerous areas (high, medium, and low). By analyzing the stress cloud map in the simulation results, the degree of stress concentration can be identified. Observe the distribution of stress on the vertical slices passing through the bottom of the valley at different filling rates. Finally, the filling system can compare the stress concentration levels at different filling rates. Since the greater the stress concentration, the lower the safety level, the filling system can construct multiple filling results based on smaller stress concentration levels.

[0084] To understand the hazard classification process, Figure 3 An optional schematic diagram of the division of Class I gully danger zones according to an embodiment of the present invention is shown in FIG. Figure 3 As shown, the filling system can divide the dangerous areas of Class I valleys into the following categories based on the buried depth from the bottom of the valley, but not limited to this: valleys with a buried depth greater than 1.5D1 from the bottom of the valley are classified as high-risk levels, valleys with a buried depth less than 1.5D1 and greater than 1.0D1 from the bottom of the valley are classified as medium-risk levels, and valleys with a buried depth less than 1.0D1 and greater than 0.8D1 from the bottom of the valley are classified as low-risk levels.

[0085] It should be noted that Figure 3 The selection of all values ​​is only for illustrative purposes. The staff can set them according to the actual situation and there is no limitation here.

[0086] Figure 4 is a detailed flow chart of a method for filling a goaf according to an embodiment of the present invention, such as Figure 4As shown, the filling system can determine whether the surface valley belongs to a large drop valley according to the size of the drop, and is divided into three categories I, II, and III, where the drop range of Category I is: drop>D1, the drop range of Category II is: D1>drop>D2, and the drop range of Category III is: D2>drop>D3. D1, D2, and D3 are drop values, respectively. For example, D1 can be 100m, D2 can be 150m, and D3 can be 200m, but not limited to this. Then, the filling system can study the impact of large drop valleys of different classifications on the impact ground pressure in dangerous areas of different depths, and can divide different dangerous areas and define the danger level according to the burial depth of the goaf under different large drop valleys. The filling system can be based on the above Figure 3 The division of the dangerous areas of Class I valleys is completed in the manner shown, which will not be repeated here. Similarly, the dangerous areas of Class II valleys can be divided as follows, but not limited to this: valleys with a burial depth greater than 1.0D2 from the bottom of the valley are classified as high-risk levels, valleys with a burial depth less than 1.0D2 and greater than 0.8D2 from the bottom of the valley are classified as medium-risk levels, and valleys with a burial depth less than 0.8D2 and greater than 0.5D2 from the bottom of the valley are classified as low-risk levels. Similarly, the dangerous areas of Class III valleys can be divided as follows, but not limited to this: valleys with a burial depth greater than 0.8D3 from the bottom of the valley are classified as high-risk levels, valleys with a burial depth less than 0.8D3 and greater than 0.5D3 from the bottom of the valley are classified as medium-risk levels, and valleys with a burial depth less than 0.5D3 and greater than 0.3D3 from the bottom of the valley are classified as low-risk levels. After completing the division of the danger levels of the above-mentioned dangerous areas, the filling system can further demonstrate the impact of the filling rates of different levels of dangerous areas on the effect of preventing and controlling rock burst, and combine it with engineering examples to verify, and finally propose more suitable goaf filling rates corresponding to different danger levels. For example, the filling system can determine that the filling rate of the above-mentioned high-risk area is 80%, the filling rate of the above-mentioned medium-risk area is 60%, and the filling rate of the above-mentioned low-risk area is 40%, but it is not limited to.

[0087] It should be noted that Figure 4 The selection of all values ​​is only for illustrative purposes. The staff can set them according to the actual situation and there is no limitation here.

[0088] According to an embodiment of the present invention, an embodiment of a goaf filling device is provided. It should be noted that the device can be used to perform the goaf filling method described above. The specific implementation method and application scenario are the same as those of the above embodiment, and will not be described in detail here.

[0089] Figure 5 Schematic diagram of a goaf filling device according to an embodiment of the present invention. Figure 5 As shown, the device comprises:

[0090] The parameter acquisition module 502 is used to obtain the contour map of the goaf and the buried depth of the coal seam in the goaf, wherein the contour map is used to reflect the valley drop at different positions in the goaf.

[0091] The area determination module 504 is used to determine the dangerous areas contained in the goaf and the danger levels corresponding to the dangerous areas based on the contour map and the burial depth, wherein the probability of collapse in the dangerous areas is greater than or equal to a preset probability.

[0092] The filling rate determination module 506 is used to perform filling simulation on the dangerous area according to multiple preset filling rates based on the danger level, so as to determine a target filling rate from the multiple preset filling rates.

[0093] The area filling module 508 is used to fill the dangerous area based on the target filling rate.

[0094] Furthermore, the area determination module is also used to: divide the goaf area based on the contour map to obtain multiple initial areas, wherein the valley drops in different initial areas are different; determine the target area and the area type of the target area from the multiple initial areas based on the valley drops corresponding to the multiple initial areas, wherein the valley drop in the target area is greater than a preset drop threshold; obtain the historical resistance curve of the support in the target area, wherein the support is used to support the rock structure of the target area; determine the dangerous area and the dangerous level from the target area based on the historical resistance curve, the area type and the burial depth.

[0095] Furthermore, the area determination module is also used to: determine the maximum working resistance of the bracket based on the historical resistance curve; determine the dangerous area from the target area based on the maximum working resistance; obtain at least one burial depth threshold matching the area type; determine the danger level of the dangerous area based on the burial depth and at least one burial depth threshold.

[0096] Furthermore, the area determination module is also used to: determine the dangerous area from the target area based on the maximum working resistance, including: evaluating the degree of danger of the target area based on the maximum working resistance to obtain a danger index of the target area; in response to the danger index being greater than or equal to a preset index, determining that the target area is a dangerous area.

[0097] Furthermore, the filling rate determination module is also used to: based on the danger level, simulate the filling of the dangerous area according to multiple preset filling rates to determine the target filling rate from the multiple preset filling rates, including: based on the danger level, select multiple initial filling rates from the multiple preset filling rates; based on the multiple initial filling rates, simulate the filling of the dangerous area to obtain multiple filling results, wherein different filling results are used to characterize the safety of the process of filling the dangerous area using the corresponding initial filling rate; based on the multiple filling results, select the target filling rate from the multiple initial filling rates, wherein the safety level corresponding to the target filling rate is greater than or equal to the safety level of other filling rates among the multiple initial filling rates except the target filling rate.

[0098] Furthermore, the filling rate determination module is also used to: based on the danger level, select multiple initial filling rates from multiple preset filling rates, including: obtaining historical filling records corresponding to the danger level, wherein the historical filling records at least include historical fill rates; in response to successfully obtaining the historical filling records, based on the filling rate range of the historical fill rates, select multiple initial filling rates from multiple preset filling rates; in response to unsuccessful acquisition of the historical filling records, determine multiple preset filling rates as multiple initial filling rates.

[0099] Furthermore, the area filling module is also used to: perform filling simulation on the dangerous area based on multiple initial filling rates to obtain multiple filling results, including: analyzing the geometric structure of the dangerous area to determine the vertical slices of the dangerous area; performing filling simulation on the dangerous area based on multiple initial filling rates, and determining multiple stress concentration levels corresponding to the vertical slices during the simulation process; and constructing multiple filling results based on multiple stress concentration levels.

[0100] An embodiment of the present application further provides an electronic device, comprising: a memory storing an executable program; and a processor for running the program, wherein the program executes the methods in various embodiments of the present invention when running.

[0101] An embodiment of the present application further provides a computer-readable storage medium, which includes a stored executable program, wherein when the executable program is running, the device where the computer-readable storage medium is located is controlled to execute the methods in various embodiments of the present invention.

[0102] An embodiment of the present application further provides a computer program product, including a computer program, which implements the methods in various embodiments of the present invention when executed by a processor.

[0103] An embodiment of the present application further provides a computer program product, including a non-volatile computer-readable storage medium, wherein the non-volatile computer-readable storage medium is used to store a computer program, and when the computer program is executed by a processor, the method in each embodiment of the present invention is implemented.

[0104] The embodiments of the present application further provide a computer program, which implements the methods in the above-mentioned embodiments of the present invention when executed by a processor.

[0105] 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.

[0106] 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 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.

[0107] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0108] 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.

[0109] If the 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 method described in 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.

[0110] 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 filling a goaf, characterized in that: include: Obtaining a contour map of the goaf and the buried depth of the coal seam in the goaf, wherein the contour map is used to reflect the valley drop at different locations in the goaf; Based on the contour topographic map and the burial depth, determining the dangerous area contained in the goaf and the danger level corresponding to the dangerous area, wherein the probability of collapse in the dangerous area is greater than or equal to a preset probability; Based on the danger level, performing filling simulation on the danger area according to a plurality of preset filling rates to determine a target filling rate from the plurality of preset filling rates; The dangerous area is filled based on the target filling rate.

2. The method according to claim 1, characterized in that: Determining the dangerous areas contained in the goaf and the danger levels corresponding to the dangerous areas based on the contour topographic map and the burial depth includes: Dividing the goaf area based on the contour topographic map to obtain a plurality of initial areas, wherein the valley drop heights of different initial areas are different; Based on the valley drops corresponding to the multiple initial areas, determining a target area and an area type of the target area from the multiple initial areas, wherein the valley drop of the target area is greater than a preset drop threshold; Acquire a historical resistance curve of a support in the target area, wherein the support is used to support a rock structure in the target area; The dangerous area and the dangerous level are determined from the target area based on the historical resistance curve, the area type and the burial depth.

3. The method according to claim 2, characterized in that Determining the dangerous area and the dangerous level from the target area based on the historical resistance curve, the area type and the burial depth includes: Based on the historical resistance curve, determining the maximum working resistance of the bracket; determining the danger zone from the target zone based on the maximum working resistance; Acquire at least one burial depth threshold matching the area type; The danger level of the danger zone is determined based on the burial depth and the at least one burial depth threshold.

4. The method according to claim 3, characterized in that Determining the dangerous area from the target area based on the maximum working resistance includes: Evaluate the danger level of the target area based on the maximum working resistance to obtain a danger index of the target area; In response to the danger index being greater than or equal to a preset index, the target area is determined to be the danger area.

5. The method according to claim 1, characterized in that Based on the danger level, performing filling simulation on the danger zone according to a plurality of preset filling rates to determine a target filling rate from the plurality of preset filling rates, including: Based on the hazard level, selecting a plurality of initial fill rates from the plurality of preset fill rates; Performing a filling simulation on the dangerous area based on the multiple initial filling rates to obtain multiple filling results, wherein different filling results are used to characterize the safety level of a process of filling the dangerous area using the corresponding initial filling rates; Based on the multiple filling results, the target filling rate is selected from the multiple initial filling rates, wherein the safety level corresponding to the target filling rate is greater than or equal to the safety levels of other filling rates among the multiple initial filling rates except the target filling rate.

6. The method according to claim 5, characterized in that Based on the hazard level, a plurality of initial filling rates are selected from the plurality of preset filling rates, including: Obtaining a historical filling record corresponding to the danger level, wherein the historical filling record at least includes a historical filling rate; In response to successfully acquiring the historical filling record, selecting the plurality of initial filling rates from the plurality of preset filling rates based on a filling rate range in which the historical filling rate is located; In response to failure to successfully obtain the historical filling records, the plurality of preset filling rates are determined as the plurality of initial filling rates.

7. The method according to claim 5, characterized in that Performing filling simulation on the dangerous area based on the multiple initial filling rates to obtain multiple filling results, including: Analyzing the geometric structure of the dangerous area to determine a vertical slice of the dangerous area; Performing filling simulation on the dangerous area based on the multiple initial filling rates, and determining multiple stress concentration levels corresponding to the vertical slices during the simulation process; The plurality of filling results are constructed based on the plurality of stress concentration levels.

8. A goaf filling device, characterized in that: include: A parameter acquisition module, used to acquire a contour map of a goaf area and the buried depth of a coal seam in the goaf area, wherein the contour map is used to reflect the valley drop at different locations in the goaf area; An area determination module, used to determine the dangerous area contained in the goaf and the danger level corresponding to the dangerous area based on the contour map and the burial depth, wherein the probability of collapse in the dangerous area is greater than or equal to a preset probability; a filling rate determination module, configured to perform filling simulation on the hazardous area according to a plurality of preset filling rates based on the hazardous level, so as to determine a target filling rate from the plurality of preset filling rates; A region filling module is used to fill the dangerous region based on the target filling rate.

9. An electronic device, characterized in that: include: A memory storing an executable program; A processor, configured to run the program, wherein the program executes the method according to any one of claims 1 to 7 when running.

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

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