Method for monitoring and joint calling of coal mine underground reservoirs

Abstract

The application provides a coal mine underground reservoir monitoring and joint calling method, which comprises the following steps: connecting multiple coal mine underground reservoirs to each other to form a coal mine underground reservoir group, and obtaining basic data of each coal mine underground reservoir; determining a monitoring point of each coal mine underground reservoir according to the basic data of each coal mine underground reservoir, and obtaining calling parameters of each coal mine underground reservoir according to the monitoring point, wherein the calling parameters comprise water level parameters, dam body parameters and water quality parameters; comparing the obtained calling parameters of each coal mine underground reservoir with early warning threshold values of each coal mine underground reservoir, and calling water in the coal mine underground reservoirs according to a comparison result. Through the technical scheme provided in the application, the problem of limited drainage paths of underground reservoirs in related technologies can be solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coal mine underground water prevention and control technology and water conservancy engineering technology, in particular to a coal mine underground reservoir monitoring and joint calling method. BACKGROUND

[0002] A large amount of mine water is generated in the development of coal in China, about 2m³ of mine water is generated per ton of coal, and at present, nearly 50 billion tons of mine water is not effectively utilized in China every year, 71% of state-owned key mining areas are short of water, and 40% of state-owned key mining areas are seriously short of water, the coal resources of six provinces in the west of China account for about 84.7% of the total in China, and the water resources account for only 7.9% of the total in China, and the water resources of Shanxi, Shaanxi, Inner Mongolia, Ningxia and Gansu account for only 3.9%, so that the shortage of water resources in the ecologically fragile area in the west of China has become a key factor restricting the scientific development of the coal industry in China. The mining areas in the west of China have the characteristics of dry climate, less rainfall and poor regional anti-disturbance ability, and large-scale coal mining causes large-scale and large-amplitude drawdown of the underground water level in the mining area, and a large amount of mine water is discharged, which not only causes waste of water resources, but also poses a serious threat to the surrounding environment.

[0003] In the related art, since the underground reservoir is built in the mine, the water storage space of the underground reservoir is not visible, the underground reservoir is supplied with sandstone fissure water and loose layer water from the upper roof for a long time, and the reservoir is also supplied with water injection flowing through the goaf, the underground reservoir is affected by many external uncertain factors for a long time, and the safety of the underground reservoir is higher than everything when the underground reservoir is filled with a large amount of water, the water level is higher than the warning water level, and the coal pillar dam body and the artificial dam body have abnormal reactions in the pressure bearing area, the mine water is discharged to achieve the effect of water discharge of the underground reservoir, the risk of water outburst is reduced, and the safety of the underground reservoir is ensured.

[0004] However, the underground reservoir in the related art discharges water by discharging mine water, which causes pollution of the surface environment and waste of water resources, so that the underground reservoir in the related art has the problem of limited drainage path. SUMMARY

[0005] The present application provides a coal mine underground reservoir monitoring and joint calling method to solve the problem of limited drainage path of the underground reservoir in the related art.

[0006] The application provides a coal mine underground reservoir monitoring and joint calling method, which comprises the following steps: connecting multiple coal mine underground reservoirs with each other to form a coal mine underground reservoir group, and obtaining basic data of each coal mine underground reservoir; determining a monitoring point of each coal mine underground reservoir according to the basic data of each coal mine underground reservoir, and obtaining calling parameters of each coal mine underground reservoir according to the monitoring point, wherein the calling parameters comprise water level parameters, dam body parameters and water quality parameters; comparing the obtained calling parameters of each coal mine underground reservoir with early warning thresholds of each coal mine underground reservoir, and calling water in the coal mine underground reservoirs according to a comparison result.

[0007] Further, the step of determining the monitoring point of each coal mine underground reservoir according to the basic data of each coal mine underground reservoir, and obtaining the calling parameters of each coal mine underground reservoir according to the monitoring point, wherein the calling parameters comprise the water level parameters, the dam body parameters and the water quality parameters, comprises the following steps: constructing a direct discharge hole in a ground surface corresponding to a low-lying area of a water storage region of each coal mine underground reservoir, setting the direct discharge hole as a first monitoring point, installing a first water level sensor at the first monitoring point, and obtaining a first water level parameter of each coal mine underground reservoir by using the first water level sensor; setting a position, at which a compressive strength of an artificial dam body and a coal pillar dam body of each coal mine underground reservoir is less than a set value, and a position, at which a permeability parameter of the artificial dam body and the coal pillar dam body of each coal mine underground reservoir is greater than a set value, as a second monitoring point, installing a dam body monitoring element at the second monitoring point, and obtaining a dam body parameter of the coal mine underground reservoir by using the dam body monitoring element; setting a drainage point of each coal mine underground reservoir as a third monitoring point, installing a water quality monitor and a second water level sensor at the third monitoring point, obtaining a water quality parameter and a second water level parameter of each coal mine underground reservoir by using the water quality monitor and the second water level sensor, and determining the water level parameter according to the first water level parameter and the second water level parameter.

[0008] Further, the calling parameters further comprise water level dynamic change conditions; the step of determining the monitoring point of each coal mine underground reservoir according to the basic data of each coal mine underground reservoir, and obtaining the calling parameters of each coal mine underground reservoir according to the monitoring point comprises the following steps: setting a hydrological observation hole of a corresponding aquifer of each coal mine underground reservoir as a fourth monitoring point, installing a third water level sensor at the fourth monitoring point, and monitoring water level dynamic change conditions of the corresponding aquifer of each coal mine underground reservoir by using the third water level sensor.

[0009] Further, the first water level sensor adopts a first pressure sensor, and the second water level sensor adopts a second pressure sensor; the first water level parameter of each coal mine underground reservoir is obtained by using the first pressure sensor, and the second water level parameter of each coal mine underground reservoir is obtained by using the second pressure sensor.

[0010] Further, the positions where the compressive strength of each artificial dam body and coal pillar dam body of the underground reservoir of the coal mine is less than a set value and the positions where the permeability parameter of each artificial dam body and coal pillar dam body of the underground reservoir of the coal mine is greater than a set value are set as second monitoring points, dam body monitoring devices are arranged at the second monitoring points, and the step of obtaining the dam body parameters of the underground reservoir of the coal mine by using the dam body monitoring devices comprises: arranging surface displacement sensors and borehole stress meters on the coal pillar dam body, obtaining the dam body parameters of the coal pillar dam body by using the surface displacement sensors and the borehole stress meters; arranging surface strain gauges and osmotic pressure gauges on the artificial dam body, obtaining the dam body parameters of the artificial dam body by using the surface strain gauges and the osmotic pressure gauges; and determining the dam body parameters according to the dam body parameters of the coal pillar dam body and the dam body parameters of the artificial dam body.

[0011] Further, the pre-warning thresholds comprise water level pre-warning thresholds and dam body pre-warning thresholds, the obtained calling parameters of each underground reservoir of the coal mine are compared with the pre-warning thresholds of each underground reservoir of the coal mine, and the step of calling the water in the underground reservoir of the coal mine according to the comparison result between the multiple underground reservoirs of the coal mine comprises: when it is determined that the water level parameter of any underground reservoir of the coal mine reaches the water level pre-warning threshold or the dam body parameter of any underground reservoir of the coal mine reaches the dam body pre-warning threshold, the water in the underground reservoir of the coal mine is discharged to the underground reservoir of the coal mine whose water level parameter does not reach the water level pre-warning threshold and whose dam body parameter does not reach the dam body pre-warning threshold.

[0012] Further, the pre-warning thresholds comprise water quality pre-warning thresholds, the obtained calling parameters of each underground reservoir of the coal mine are compared with the pre-warning thresholds of each underground reservoir of the coal mine, and the step of calling the water in the underground reservoir of the coal mine according to the comparison result between the multiple underground reservoirs of the coal mine further comprises: when it is determined that the water quality parameter of any underground reservoir of the coal mine reaches the water quality pre-warning threshold, the water quality parameter of the underground reservoir of the coal mine is compared with the water quality parameters of the other underground reservoirs of the coal mine, and the water of the underground reservoir of the coal mine is mixed and neutralized with the water of one or more other underground reservoirs of the coal mine according to the comparison result.

[0013] Further, the water quality pre-warning thresholds comprise Ph value water quality pre-warning thresholds and Cl - ion index water quality pre-warning thresholds, when it is determined that the water quality parameter of each underground reservoir of the coal mine reaches the water quality pre-warning threshold, the water quality parameter of the underground reservoir of the coal mine is compared with the water quality parameters of the other underground reservoirs of the coal mine, and the water of the underground reservoir of the coal mine is mixed and neutralized with the water of one or more other underground reservoirs of the coal mine according to the comparison result, the step comprises: obtaining the Ph value and the Cl - ion index of each underground reservoir of the coal mine, and determining that the Ph value of any underground reservoir of the coal mine reaches the Ph value water quality pre-warning threshold and / or the Cl - ion index of any underground reservoir of the coal mine reaches the Cl - ion index water quality pre-warning threshold, the water quality parameter of the underground reservoir of the coal mine is compared with the water quality parameters of the other underground reservoirs of the coal mine, and the water of the underground reservoir of the coal mine is mixed and neutralized with the water of one or more other underground reservoirs of the coal mine according to the comparison result. -ion indicators with the pH and / or Cl of other coal mine underground reservoirs - The ion indicators are compared, and the water of the coal mine underground reservoir is mixed with the water of one or more other coal mine underground reservoirs according to the comparison result.

[0014] Further, the step of comparing the obtained calling parameter of each coal mine underground reservoir with the early warning threshold of each coal mine underground reservoir according to the comparison result to call the water in the coal mine underground reservoir between the multiple coal mine underground reservoirs further comprises: when it is determined that the calling parameter of any coal mine underground reservoir reaches the early warning threshold of the coal mine underground reservoir, the monitoring system sends an early warning signal.

[0015] Further, the coal mine underground reservoir monitoring and joint calling method further comprises: comparing the obtained water level parameter of each coal mine underground reservoir with the water level emergency discharge value of each coal mine underground reservoir, comparing the obtained dam parameter of each coal mine underground reservoir with the dam emergency discharge value of each coal mine underground reservoir, and when the obtained water level parameter of each coal mine underground reservoir reaches the water level emergency discharge value and / or the obtained dam parameter of each coal mine underground reservoir reaches the dam emergency discharge value, each coal mine underground reservoir performs a discharge operation.

[0016] By applying the technical solution of the present application, the multiple coal mine underground reservoirs are connected to form a coal mine underground reservoir group, the coal mine underground reservoir group is monitored in a system, and the coal mine underground reservoir group is monitored in real time, intelligently evaluated and controlled. The monitoring points of each coal mine underground reservoir are determined according to the basic data of each coal mine underground reservoir, and the calling parameter of each coal mine underground reservoir is obtained according to the monitoring points. The calling parameter includes a water level parameter, a dam parameter and a water quality parameter. The structural safety of the coal mine underground reservoir is analyzed through the water level parameter and the dam parameter, and the water quality safety of the coal mine underground reservoir is analyzed through the water quality parameter. The safe and stable operation condition of the coal mine underground reservoir can be comprehensively and real-timely monitored, and the safe and stable operation of the coal mine underground reservoir is ensured. The obtained calling parameter of each coal mine underground reservoir is compared with the early warning threshold of each coal mine underground reservoir, and the water in the coal mine underground reservoir is called between the multiple coal mine underground reservoirs according to the comparison result. The water resources of the coal mine underground reservoir group are comprehensively called, the efficient utilization of the water resources of the coal mine underground reservoir group is ensured, the drainage way of the coal mine underground reservoir group is enriched, and the waste of water resources and environmental pollution caused by the drainage of the accumulated water of the coal mine underground reservoir are avoided. BRIEF DESCRIPTION OF DRAWINGS

[0017] The accompanying drawings, which form a part of the present application, are used to provide further understanding of the present application, and the illustrative embodiments of the present application and their descriptions are used to explain the present application, and do not constitute improper limitations on the present application. In the drawings:

[0018] Figure 1A flow chart of the method for monitoring and jointly calling the underground reservoir of the coal mine according to the embodiment of the present application is shown;

[0019] Figure 2 A flow chart of the determination of the monitoring point and the acquisition of the calling parameter of the method for monitoring and jointly calling the underground reservoir of the coal mine according to the embodiment of the present application is shown;

[0020] Figure 3 A flow chart of the acquisition of the dam parameter of the method for monitoring and jointly calling the underground reservoir of the coal mine according to the embodiment of the present application is shown;

[0021] Figure 4 A flow chart of the joint calling of the method for monitoring and jointly calling the underground reservoir of the coal mine according to the embodiment of the present application is shown;

[0022] Figure 5 A flow chart of the method for monitoring and jointly calling the underground reservoir of the coal mine according to the embodiment of the present application is shown;

[0023] Figure 6 A connection schematic diagram of the group of the underground reservoirs of the coal mine of the method for monitoring and jointly calling the underground reservoir of the coal mine according to the embodiment of the present application is shown;

[0024] Figure 7 Another connection schematic diagram of the group of the underground reservoirs of the coal mine of the method for monitoring and jointly calling the underground reservoir of the coal mine according to the embodiment of the present application is shown;

[0025] Figure 8 A top view of the underground reservoir of the coal mine of the method for monitoring and jointly calling the underground reservoir of the coal mine according to the embodiment of the present application is shown;

[0026] Figure 9 A cross-sectional view at A-A of the above figure is shown. Figure 8

[0027] Wherein, the above figure includes the following reference signs:

[0028] 10, underground reservoir of the coal mine; 11, straight hole; 12, artificial dam; 13, coal column dam; 14, drainage point; 15, water injection hole;

[0029] 20, monitoring point; 21, first monitoring point; 23, third monitoring point;

[0030] 31, first water level sensor; 32, dam monitoring member; 321, surface displacement sensor; 322, borehole stress meter; 323, surface strain gauge; 324, osmometer. DETAILED DESCRIPTION

[0031] ​Clearly, the described embodiments are merely a part of the embodiments of the present application, rather than all the embodiments. The description of the at least one example embodiment is merely illustrative, and is by no means intended to limit the present application and its application or use in any way. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0032] As shown in Figures 1 to 9 The coal mine underground reservoir monitoring and joint calling method provided by the embodiments of the present application comprises:

[0033] S100, the plurality of coal mine underground reservoirs 10 are connected to each other to form a coal mine underground reservoir group, and the basic data of each coal mine underground reservoir 10 is obtained;

[0034] S200, the monitoring points 20 of each coal mine underground reservoir 10 are determined according to the basic data of each coal mine underground reservoir 10, and the calling parameters of each coal mine underground reservoir 10 are obtained according to the monitoring points 20, the calling parameters including water level parameters, dam body parameters and water quality parameters;

[0035] S300, the calling parameters of each coal mine underground reservoir 10 obtained are compared with the early warning threshold of each coal mine underground reservoir 10, and the water in the coal mine underground reservoir 10 is called between the plurality of coal mine underground reservoirs 10 according to the comparison result.

[0036] The coal mine underground reservoir monitoring and joint calling method provided in the embodiment is used to connect multiple coal mine underground reservoirs 10 to form a coal mine underground reservoir group, and the coal mine underground reservoir group is monitored in a system manner, so that the coal mine underground reservoir group is monitored in real time, intelligently evaluated and regulated. The monitoring points 20 of each coal mine underground reservoir 10 are determined according to the basic data of each coal mine underground reservoir 10, and the calling parameters of each coal mine underground reservoir 10 are obtained according to the monitoring points 20. The calling parameters include water level parameters, dam body parameters and water quality parameters. The structural safety of the coal mine underground reservoir 10 is analyzed according to the water level parameters and the dam body parameters, and the water quality safety of the coal mine underground reservoir 10 is analyzed according to the water quality parameters. The safety and stability of the coal mine underground reservoir 10 can be comprehensively and real-timely monitored, and the safe and stable operation of the coal mine underground reservoir 10 is ensured. The calling parameters of each coal mine underground reservoir 10 obtained are compared with the early warning threshold of each coal mine underground reservoir 10, and the water in the coal mine underground reservoir 10 is called according to the comparison result, so that the water resources of the coal mine underground reservoir group are comprehensively called, the efficient use of the water resources of the coal mine underground reservoir group is ensured, the drainage way of the coal mine underground reservoir group is enriched, and the waste of water resources and environmental pollution caused by the drainage of the coal mine underground reservoir 10 are avoided.

[0037] In the step S100 of connecting multiple coal mine underground reservoirs 10 to form a coal mine underground reservoir group and obtaining the basic data of each coal mine underground reservoir 10, the pipelines of the multiple coal mine underground reservoirs 10 are connected according to the principles of not affecting the coal mine underground reservoir group, mutual calling, short route and easy laying, and the positions of the ground water injection holes and the ground drainage holes are mainly selected according to the water storage distribution characteristics and the topographic features of the underground reservoir. The basic data of each coal mine underground reservoir 10 includes the position of the coal mine underground reservoir 10, the artificial dam body and the coal pillar dam body structure, the reservoir water storage safety warning height, the reservoir water storage range and the reservoir water supply source, and the monitoring range, the monitoring method and the monitoring equipment of each coal mine underground reservoir 10 are determined according to the basic data.

[0038] Specifically, in the step S200, the structural safety of the coal mine underground reservoir 10 is analyzed according to the water level parameters and the dam body parameters of the coal mine underground reservoir 10, and the water quality safety of the coal mine underground reservoir 10 is analyzed according to the water quality parameters of the coal mine underground reservoir 10, so that the safety monitoring parameters of the coal mine underground reservoir 10 are single, the emergency drainage triggering standard of the coal mine underground reservoir 10 is increased, and the safe and stable operation of the coal mine underground reservoir 10 is ensured.

[0039] In the step S300, the early warning threshold of the coal mine underground reservoir 10 is set according to the monitoring and early warning response requirements of each coal mine underground reservoir and the water storage safety evaluation conclusion.

[0040] It should be noted that the interconnection of multiple underground coal mine reservoirs in step S100 refers to the selective interconnection of multiple underground coal mine reservoirs 10 based on the comparison result of step S300, rather than the continuous interconnection of multiple underground coal mine reservoirs 10.

[0041] like Figure 2 As shown, based on the basic data of each coal mine underground reservoir 10, the monitoring point 20 of each coal mine underground reservoir 10 is determined, and the calling parameters of each coal mine underground reservoir 10 are obtained based on the monitoring point 20. The calling parameters include water level parameters, dam body parameters, and water quality parameters. Step S200 includes:

[0042] S210. Construct direct discharge holes 11 on the surface corresponding to the low-lying water storage area of ​​each coal mine underground reservoir 10, set the direct discharge holes 11 as the first monitoring point 21, install the first water level sensor 31 at the first monitoring point 21, and use the first water level sensor 31 to obtain the first water level parameters of each coal mine underground reservoir 10.

[0043] S220. The locations where the compressive strength of the artificial dam 12 and coal pillar dam 13 of each coal mine underground water reservoir 10 is less than the set value, and the locations where the permeability parameters of the artificial dam 12 and coal pillar dam 13 of each coal mine underground water reservoir 10 are greater than the set value, are set as the second monitoring points. Dam monitoring devices 32 are installed at the second monitoring points, and the dam parameters of the coal mine underground water reservoir 10 are obtained using the dam monitoring devices 32.

[0044] S230. The drainage point 14 of each coal mine underground water reservoir 10 is designated as the third monitoring point 23. A water quality monitor and a second water level sensor are installed at the third monitoring point 23. The water quality parameters and second water level parameters of each coal mine underground water reservoir 10 are obtained using the water quality monitor and the second water level sensor. The water level parameters are determined based on the first and second water level parameters. The first water level parameter monitored by the first water level sensor 31 reflects the water content of the coal mine underground water reservoir 10. The water level parameters are determined using the first and second water level parameters to ensure that the water level parameters reliably reflect the water content of the coal mine underground water reservoir 10. The dam parameters detected by the dam monitoring device 32 reflect the dam stability of the artificial dam 12 and coal pillar dam 13 of the coal mine underground water reservoir 10, ensuring the accuracy of the dam parameters. This allows for the analysis of the structural safety of the coal mine underground water reservoir 10 using these dam parameters. The water quality parameters detected by the water quality monitor reflect the water quality safety of the coal mine underground water reservoir 10. By analyzing the structural safety of the underground coal mine reservoir 10 through water level and dam parameters, and the water quality safety of the underground coal mine reservoir 10 through water quality parameter analysis, the safe and stable operation of the underground coal mine reservoir 10 can be comprehensively monitored in real time, thus ensuring the safe and stable operation of the underground coal mine reservoir 10.

[0045] Based on the distribution characteristics of underground reservoirs, the hydrogeological conditions of underground reservoir recharge sources, the rock compressive strength and permeability parameters of coal pillar dams and artificial dams, and the pressure-bearing state of reservoir dams, direct discharge holes 11 are constructed on the surface in the low-lying areas of each coal mine underground reservoir 10. The water level changes of the coal mine underground reservoir 10 are monitored through the direct discharge holes 11, and the direct discharge holes 11 can be used for drainage of the coal mine underground reservoir during joint operation and emergency water release.

[0046] In this embodiment, surface injection holes 15 are constructed in the higher water storage areas of each coal mine underground water reservoir 10. The diameters of the injection holes 15 and the direct discharge holes 11 are determined according to the drainage equipment requirements.

[0047] It should be noted that, in this embodiment, a water injection hole 15 is constructed on the surface corresponding to the higher water storage area of ​​each coal mine underground water reservoir 10, and a direct discharge hole 11 is constructed on the surface corresponding to the lower water storage area of ​​each coal mine underground water reservoir 10. In other embodiments, multiple water injection holes 15 can be constructed on the surface corresponding to the higher water storage area of ​​each coal mine underground water reservoir 10, and multiple direct discharge holes 11 can be constructed on the surface corresponding to the lower water storage area of ​​each coal mine underground water reservoir 10.

[0048] In this embodiment, the coal mine underground water reservoir group includes five coal mine underground water reservoirs 10. A DN300 pipeline is laid at each of the water injection holes 15 and direct discharge holes 11, and connected at a certain location in the mine via a tee. This tee serves as the control hub for the drainage and water injection of the coal mine underground water reservoir 10. Water injection and drainage pipes are led out from this tee and connected to the water injection and drainage pipes led out from the tees of other coal mine underground water reservoirs 10. Two tees and one cross-junction are needed to complete the pipeline connection between the five coal mine underground water reservoirs 10. Each tee and cross-junction is individually equipped with a sluice gate and valve, enabling mutual access to water resources among the various coal mine underground water reservoirs 10 without interference. The principle for determining the pipeline connection location is to facilitate pipeline laying and connection with other mine pipelines. The water injection and drainage pipes use DN300 to DN400 pipes.

[0049] like Figure 2 As shown, the calling parameters also include dynamic changes in water level. The step S200, which involves determining the monitoring points 20 for each coal mine underground reservoir 10 based on the basic data of each reservoir 10, and obtaining the calling parameters for each reservoir 10 based on the monitoring points 20, includes:

[0050] S240. The hydrological observation well corresponding to the aquifer of each coal mine underground reservoir 10 is designated as the fourth monitoring point. A third water level sensor is installed at the fourth monitoring point to monitor the dynamic changes in the water level of the aquifer corresponding to each coal mine underground reservoir 10. Since a sudden drop in the aquifer water level will cause a sudden rise in the water level of the corresponding coal mine underground reservoir 10, monitoring the dynamic changes in the water level of the aquifer corresponding to each coal mine underground reservoir 10 through the third water level sensor can reflect the dynamic changes in the water level of the corresponding coal mine underground reservoir 10, preventing a sudden drop in the aquifer water level from causing a large-scale replenishment of the coal mine underground reservoir and resulting in a disaster. This increases the emergency drainage trigger standard for the coal mine underground reservoir 10, ensuring the safe and stable operation of the coal mine underground reservoir 10.

[0051] The monitoring range of the aquifer of the underground water reservoir 10 is determined based on the water supply source of the underground water reservoir 10. The early warning threshold for the dynamic change of the water level of the aquifer is based on three times the maximum hourly water level change of the aquifer under the condition of no mining disturbance in the previous year.

[0052] In this embodiment, the first water level sensor 31 is a first pressure sensor, and the second water level sensor is a second pressure sensor. The first pressure sensor is used to obtain the first water level parameter of each coal mine underground water reservoir 10, and the second pressure sensor is used to obtain the second water level parameter of each coal mine underground water reservoir 10. By using the first and second pressure sensors and utilizing the linear relationship between the pressure detection values ​​and water level values ​​of the first and second pressure sensors, the accuracy of the detection of the first and second water level parameters is ensured, thus guaranteeing the precision of the water level parameters.

[0053] like Figure 3 As shown, the locations where the compressive strength of the artificial dam 12 and coal pillar dam 13 of each coal mine underground water reservoir 10 is less than a set value, and the locations where the permeability parameters of the artificial dam 12 and coal pillar dam 13 of each coal mine underground water reservoir 10 are greater than a set value, are set as second monitoring points. Dam monitoring devices 32 are installed at the second monitoring points. The step S220 of obtaining the dam parameters of the coal mine underground water reservoir 10 using the dam monitoring devices 32 includes:

[0054] S221. Surface displacement sensor 321 and borehole stress gauge 322 are installed on the coal pillar dam body 13 to obtain the dam body parameters of the coal pillar dam body 13.

[0055] S222. Surface strain gauges 323 and piezometers 324 are installed on the artificial dam body 12, and the dam body parameters of the artificial dam body 12 are obtained by using surface strain gauges 323 and piezometers 324.

[0056] S223, determine the dam parameters according to the dam parameters of the coal pillar dam 13 and the dam parameters of the artificial dam 12. The stress changes and deformations of the coal pillar dam 13 are monitored by the surface displacement sensor 321 and the borehole stress meter 322, the dam strain of the artificial dam 12 is monitored by the surface strain meter 323, the seepage of the coal pillar dam 13 at the connection between the coal pillar dam 13 and the artificial dam 12 is monitored by the osmometer 324, and the dam parameters are determined according to the dam parameters of the coal pillar dam 13 and the dam parameters of the artificial dam 12, so that the dam parameters can dynamically monitor and analyze the dam stability of the coal pillar dam 13 and the artificial dam 12 from multiple angles, and the accuracy of the dam parameters is ensured.

[0057] The surface strain meter 323 is arranged in the dam stress concentration area of the artificial dam 12 and is buried in the artificial dam 12 to a depth of 20-50 mm, the osmometer 324 is arranged on the side of the artificial dam 12 corresponding to the coal pillar dam 13 and is buried in the coal pillar dam 13 to a depth of 2-3 m, the borehole stress meter 322 is arranged on the coal pillar dam 13 and is buried in the coal pillar dam 13 to a depth of 2-3 m, and the borehole stress meter 322 is arranged in groups of four, and the surface displacement sensor 321 is installed on the roof and floor of the intersection between the roadway and the coal pillar dam 13 and is connected to the surface displacement sensor 321 on the roof and the surface displacement sensor 321 on the floor by a steel wire rope.

[0058] As shown in Figure 4 The warning threshold includes a water level warning threshold and a dam warning threshold, and the calling parameters of each coal mine underground reservoir 10 are compared with the warning threshold of each coal mine underground reservoir 10, and the step S300 of calling the water in the coal mine underground reservoir 10 according to the comparison result between the multiple coal mine underground reservoirs 10 includes:

[0059] S310, when it is determined that the water level parameter of any coal mine underground reservoir 10 reaches the water level warning threshold or the dam parameter of any coal mine underground reservoir 10 reaches the dam warning threshold, the water in the coal mine underground reservoir 10 is discharged to the coal mine underground reservoir 10 whose water level parameter does not reach the water level warning threshold and whose dam parameter does not reach the dam warning threshold. When it is determined that the water level parameter of any coal mine underground reservoir 10 reaches the water level warning threshold or the dam parameter of any coal mine underground reservoir 10 reaches the dam warning threshold, the structure safety of the coal mine underground reservoir 10 is ensured by discharging the water in the coal mine underground reservoir 10, and since the water in the coal mine underground reservoir 10 is discharged to the coal mine underground reservoir 10 whose water level parameter does not reach the water level warning threshold and whose dam parameter does not reach the dam warning threshold, the water resources of the coal mine underground reservoir group are comprehensively called, the structure safety of the coal mine underground reservoir group is ensured, the water resources of the coal mine underground reservoir group are efficiently utilized, and water resource waste and environmental pollution caused by the discharge of accumulated water in the coal mine underground reservoir 10 are avoided.

[0060] Among them, the water level warning threshold and dam warning threshold of the underground water reservoir 10 in the coal mine, as well as the call time, are all determined by professional institutions through assessment.

[0061] like Figure 4 As shown, the warning threshold includes a water quality warning threshold. The step S300, which compares the obtained call parameters for each coal mine underground water reservoir 10 with the warning threshold for each coal mine underground water reservoir 10, and calls water from multiple coal mine underground water reservoirs 10 based on the comparison result, further includes:

[0062] S320. When it is determined that the water quality parameter of any coal mine underground water reservoir 10 reaches the water quality warning threshold, the water quality parameter of the coal mine underground water reservoir 10 is compared with the water quality parameter of other coal mine underground water reservoirs 10. Based on the comparison result, the water of the coal mine underground water reservoir 10 is mixed and neutralized with the water of one or more other coal mine underground water reservoirs 10. The water in different coal mine underground water reservoirs 10 exceeds the standard for individual elements, restricting the water use for production, living and ecological purposes in the mining area. When the water quality parameters of any coal mine underground water reservoir 10 are determined to reach the water quality warning threshold, the water in that coal mine underground water reservoir 10 is mixed and neutralized with the water in one or more other coal mine underground water reservoirs 10 based on the comparison results of the water quality parameters. Through the mixing and neutralization of water quality among different coal mine underground water reservoirs 10, the excessive elements in the water of the coal mine underground water reservoir 10 are diluted, meeting the water quality requirements for direct use in the mine, improving the water quality safety of the coal mine underground water reservoirs 10. The water quality parameters are used as the basis for the daily mixing and neutralization of water volume among coal mine underground water reservoirs to dilute the excessive ions before reuse, so as to achieve the rational allocation and efficient utilization of water resources in the coal mine underground water reservoir group.

[0063] Specifically, based on the water quality parameters of the coal mine underground water reservoir 10, and according to the water quality index compliance ratio formula of different coal mine underground water reservoirs 10, the available water sources and water allocation quantities of the coal mine underground water reservoir group are calculated. Combined with the early warning threshold of the coal mine underground water reservoir 10, the specific coal mine underground water reservoir 10 selected for allocation and neutralization, as well as the allocation and neutralization ratio, are determined. During the allocation and neutralization period, the water quality parameters of the coal mine underground water reservoir 10 are monitored in real time, thereby intelligently starting and stopping the allocation and neutralization water volume ratio of the coal mine underground water reservoir 10.

[0064] In this embodiment, the water quality warning threshold includes the pH value water quality warning threshold and the Cl value water quality warning threshold. - The step S320, which involves adjusting and neutralizing the water quality parameters of one coal mine underground reservoir 10 with the water quality parameters of other coal mine underground reservoirs 10 based on the comparison results, includes the following: Ion index water quality early warning threshold.

[0065] S321, obtaining the Ph value and Cl of each coal mine underground reservoir 10 - ion index, when the Ph value of any coal mine underground reservoir 10 reaches the Ph value water quality early warning threshold and / or Cl - ion index reaches Cl - ion index water quality early warning threshold, the Ph value and / or Cl - ion index of the coal mine underground reservoir 10 is compared with the Ph value and / or Cl - ion index of other coal mine underground reservoir 10, and the water of the coal mine underground reservoir 10 is mixed and neutralized with the water of one or more other coal mine underground reservoir 10 according to the comparison result. By monitoring the Ph value and Cl - ion index of each coal mine underground reservoir 10, and according to the Ph value and / or Cl - ion index comparison result, the mixed and neutralized between coal mine underground reservoir 10 is carried out, the PH value of the water of the coal mine underground reservoir 10 is reduced, the corrosiveness of the water of the coal mine underground reservoir 10 to the underground equipment is reduced, the service life of the underground equipment is prolonged, the underground operation environment is improved, the Cl - ion index of the water of the coal mine underground reservoir 10 is reduced, the drinkability of the water of the coal mine underground reservoir 10 is improved, and the cost of subsequent drinking water treatment of the water of the coal mine underground reservoir 10 is reduced.

[0066] Among them, the high Cl - ion, acid water and the like of the coal mine underground reservoir 10 are mixed and diluted with the low Cl - ion, alkaline water of the adjacent coal mine underground reservoir 10 to reach the direct utilization standard.

[0067] In this embodiment, a plurality of coal mine underground reservoirs 10 are connected to form a coal mine underground reservoir group. The early warning threshold of different coal mine underground reservoirs 10 is analyzed and evaluated from four aspects of water level parameters, dam body parameters, water level dynamic change of aquifer and water quality parameters, the real-time monitoring and intelligent evaluation of the safety state of the underground reservoir are realized, the key equipment such as water pump, valve and emergency drainage device is controlled in real time according to the calling measures, the intelligent regulation and control of the daily operation of the coal mine underground reservoir group and the disaster regulation and control of the emergency state are realized, and the safe operation of the coal mine underground reservoir group is ensured.

[0068] As Figure 4 shown, the calling parameters of each coal mine underground reservoir 10 obtained are compared with the early warning threshold of each coal mine underground reservoir 10, and the step S300 of calling the water in the coal mine underground reservoir 10 between the plurality of coal mine underground reservoirs 10 according to the comparison result further includes:

[0069] S330, when it is determined that the calling parameter of any coal mine underground reservoir 10 reaches the early warning threshold of the coal mine underground reservoir 10, the monitoring system sends an early warning signal. Since the coal mine underground reservoir 10 is built inside the mine, the water storage space of the coal mine underground reservoir 10 is invisible, and the early warning signal sent by the monitoring system helps the on-site personnel to know the situation of the invisible water storage space of the coal mine underground reservoir 10 through the early warning signal, so as to facilitate the on-site personnel to take measures to prevent the collapse risk of the coal mine underground reservoir 10 and improve the application safety of the monitoring and joint calling method of the coal mine underground reservoir.

[0070] As shown in Figure 5 The monitoring and joint calling method of the coal mine underground reservoir further comprises:

[0071] S400, compare the obtained water level parameter of each coal mine underground reservoir 10 with the water level emergency drainage value of each coal mine underground reservoir 10, and compare the obtained dam parameter of each coal mine underground reservoir 10 with the dam emergency drainage value of each coal mine underground reservoir 10, when the obtained water level parameter of each coal mine underground reservoir 10 reaches the water level emergency drainage value and / or the dam parameter of each coal mine underground reservoir 10 reaches the dam emergency drainage value, each coal mine underground reservoir 10 performs drainage operation. When the obtained water level parameter of each coal mine underground reservoir 10 reaches the water level emergency drainage value, or the dam parameter of each coal mine underground reservoir 10 reaches the dam emergency drainage value, or the water level parameter of each coal mine underground reservoir 10 reaches the water level emergency drainage value and the dam parameter of each coal mine underground reservoir 10 reaches the dam emergency drainage value, that is, under the premise of ensuring the structural safety of the coal mine underground reservoir group, the coal mine underground reservoir group reaches the maximum water storage capacity, and the drainage operation is performed on each coal mine underground reservoir 10 to achieve the disaster control of the emergency state of the coal mine underground reservoir group.

[0072] In step S400, according to the monitoring and early warning response requirement of each coal mine underground reservoir and the water storage safety evaluation conclusion, the water level emergency drainage value and the dam emergency drainage value of the coal mine underground reservoir 10 are set.

[0073] In this embodiment, when the water level calling parameter of the coal mine underground reservoir 10 reaches the water level early warning threshold, the dam calling parameter of the coal mine underground reservoir 10 reaches the dam early warning threshold, and the water quality calling parameter of the coal mine underground reservoir 10 reaches the water quality early warning threshold, the calling between the multiple coal mine underground reservoirs 10 is preferentially performed according to the water level calling parameter and the dam calling parameter to ensure the structural safety of the coal mine underground reservoir 10.

[0074] When any one of the calling parameters of any one of the coal mine underground reservoirs 10 reaches a warning threshold, the selection of the reservoir to be called and the calling time are determined according to the calling parameter analysis, and the key equipment such as the water pump, the valve and the emergency drainage device is controlled in real time according to the regulation strategy, so as to realize the intelligent regulation and control of the daily storage operation of the coal mine underground reservoir group and the disaster regulation and control in the emergency state, and to ensure the safe operation of the coal mine underground reservoir group.

[0075] The method provided by the embodiment has the following beneficial effects:

[0076] (1) The calling parameters of each coal mine underground reservoir 10 are compared with the warning thresholds of each coal mine underground reservoir 10, and the water in the coal mine underground reservoir 10 is called between the multiple coal mine underground reservoirs 10 according to the comparison result, so that the water resources of the coal mine underground reservoir group are comprehensively called, the efficient use of the water resources of the coal mine underground reservoir group is ensured, the drainage way of the coal mine underground reservoir group is enriched, and the waste of water resources and environmental pollution caused by the drainage of the accumulated water of the coal mine underground reservoir 10 are avoided;

[0077] (2) The multiple coal mine underground reservoirs 10 are connected to form a coal mine underground reservoir group, and the coal mine underground reservoir group is monitored in a system, so that the coal mine underground reservoir group is monitored in real time, intelligently evaluated and controlled;

[0078] (3) The structural safety of the coal mine underground reservoir 10 is analyzed through the water level parameters, the dam body parameters and the dynamic change of the water level of the aquifer, the real-time monitoring and safety evaluation of the aquifer, the artificial dam body, the coal column dam body and the water level of the coal mine underground reservoir 10 are performed, the safety hidden danger of the reservoir is found in time, the real-time monitoring and intelligent evaluation of the safety state of the underground reservoir are realized, the water quality safety of the coal mine underground reservoir 10 is analyzed through the water quality parameters, the comprehensiveness of the safety analysis of the coal mine underground reservoir 10 is ensured, and the coal mine underground reservoir 10 is comprehensively and real-timely monitored in the safe and stable operation state;

[0079] (4) The Ph value and the Cl - ion index of each coal mine underground reservoir 10 are monitored, and the multiple coal mine underground reservoirs 10 are adjusted and neutralized according to the comparison result of the Ph value and / or the Cl - ion index, so as to reduce the PH value of the water of the coal mine underground reservoir 10, reduce the corrosiveness of the water of the coal mine underground reservoir 10 to the underground equipment, prolong the service life of the underground equipment, improve the underground operation environment, reduce the Cl - ion index of the water of the coal mine underground reservoir 10, and improve the drinkability of the water of the coal mine underground reservoir 10 and reduce the cost of subsequent drinking water treatment of the water of the coal mine underground reservoir 10.

[0080] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, devices, components and / or combinations thereof, but do not preclude the presence or addition of one or more other features, steps, operations, devices, components and / or combinations thereof.

[0081] The relative arrangement of components and steps, numerical expressions, and numerical values set forth in the examples are not intended to limit the scope of the application unless otherwise specifically stated. It is to be understood that the drawings are not necessarily to scale of the various parts shown in the drawings. Techniques, methods, and apparatus known to those of ordinary skill are not discussed in detail because they would be understood that such techniques, methods, and apparatus are considered part of the art. In all examples shown and discussed herein, any specific values are to be interpreted as merely illustrative and not limiting. Thus, other examples of the example embodiments can have different values. It is noted that like numbers and letters on the figures identify like parts throughout the several views, and thus, once an item is defined in one figure, it is not necessary to discuss it further in connection with other figures where it is understood that the item will be present.

[0082] In the description of the present application, it is to be understood that the orientation or positional relationships indicated by terms such as "front", "back", "up", "down", "left", "right", "lateral", "vertical", "horizontal", and "top", "bottom" are generally based on the orientation or positional relationships shown in the drawings, and are merely for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be construed as limiting the scope of protection of the present application. The orientation terms "inner", "outer" refer to the inner and outer relative to the contour of the components themselves.

[0083] For purposes of the description hereinafter, spatial or directional terms, for example, "above", "below", "upper", "lower", and the like, can be used, and relate to the device as illustrated in the figures. However, it is to be understood that no absolute or relative orientation of the device is intended or implied, unless specifically described as such. Terms concerning attachments, coupling and the like, such as "connected" and "coupled" and the like, are to be construed in accordance with their normal meanings, that is, as referring to an indirect or direct connection or coupling. Any reference to "comprising" or "containing" is to be construed as meaning "comprising or containing, but not limited to". Any reference to "comprising" or "containing" is to be construed as meaning "comprising or containing, but not limited to".

[0084] In addition, it should be pointed out that the use of the terms "first", "second" and the like, to describe various elements, is merely intended to differentiate the elements from one another, and does not connote any special order or order of precedence, unless otherwise specifically indicated. Thus, the use of the terms "first", "second" and the like, is not intended to limit the scope of the present application, and is not intended to connote any special order or order of precedence.

[0085] The preferred embodiments herein disclosed are not intended to limit or restrict the scope of the application, but merely convey the best mode contemplated by the inventors of carrying out the claimed application. Any modifications, changes, improvements, and equivalents that fall within the spirit and scope of the application should be considered as falling within the scope of the application.

Claims

1. A method for monitoring and jointly utilizing underground water reservoirs in coal mines, characterized in that, The monitoring and joint operation methods for underground water reservoirs in coal mines include: Multiple underground water reservoirs (10) in coal mines are interconnected to form a coal mine underground water reservoir group, and basic data of each underground water reservoir (10) in coal mines are obtained; Based on the basic data of each coal mine underground reservoir (10), the monitoring point (20) of each coal mine underground reservoir (10) is determined, and the calling parameters of each coal mine underground reservoir (10) are obtained based on the monitoring point (20). The calling parameters include water level parameters, dam body parameters and water quality parameters. The call parameters of each coal mine underground water reservoir (10) are compared with the early warning threshold of each coal mine underground water reservoir (10), and the water in the coal mine underground water reservoir (10) is called among multiple coal mine underground water reservoirs (10) according to the comparison result; In each of the coal mine underground water reservoirs (10), a surface direct discharge hole (11) is constructed in the low-lying area of ​​the water storage terrain. The direct discharge hole (11) is set as the first monitoring point (21). A first water level sensor (31) is installed at the first monitoring point (21). The first water level parameter of each coal mine underground water reservoir (10) is obtained by using the first water level sensor (31). The locations where the compressive strength of the artificial dam (12) and coal pillar dam (13) of each coal mine underground water reservoir (10) is less than a set value, and the locations where the permeability parameters of the artificial dam (12) and coal pillar dam (13) of each coal mine underground water reservoir (10) are greater than a set value, are set as second monitoring points. Dam monitoring devices (32) are installed at the second monitoring points, and the dam parameters of the coal mine underground water reservoir (10) are obtained using the dam monitoring devices (32). The drainage point (14) of each of the underground water reservoirs (10) of the coal mine is set as the third monitoring point (23). A water quality monitor and a second water level sensor are installed at the third monitoring point (23). The water quality parameters and the second water level parameters of each underground water reservoir (10) of the coal mine are obtained by using the water quality monitor and the second water level sensor. The water level parameters are determined according to the first water level parameters and the second water level parameters. The hydrological observation well corresponding to the aquifer of each coal mine underground water reservoir (10) is set as the fourth monitoring point. A third water level sensor is installed at the fourth monitoring point. The third water level sensor is used to monitor the dynamic changes in the water level of the aquifer corresponding to each coal mine underground water reservoir (10). The monitoring range of the aquifer of the coal mine underground water reservoir (10) is determined according to the water supply source of the coal mine underground water reservoir (10). The early warning threshold for the dynamic changes in the water level of the aquifer is based on three times the maximum hourly water level change value of the aquifer under the condition of no mining interference in the previous year.

2. The method for monitoring and jointly utilizing underground water reservoirs in coal mines according to claim 1, characterized in that, The first water level sensor (31) adopts a first pressure sensor, and the second water level sensor adopts a second pressure sensor. The first water level parameter of each coal mine underground reservoir (10) is obtained by using the first pressure sensor, and the second water level parameter of each coal mine underground reservoir (10) is obtained by using the second pressure sensor.

3. The method for monitoring and jointly utilizing underground water reservoirs in coal mines according to claim 1, characterized in that, The locations where the compressive strength of the artificial dam (12) and coal pillar dam (13) of each coal mine underground water reservoir (10) is less than a set value, and the locations where the permeability parameters of the artificial dam (12) and coal pillar dam (13) of each coal mine underground water reservoir (10) are greater than a set value, are set as second monitoring points. Dam monitoring devices (32) are installed at the second monitoring points. The steps of obtaining the dam parameters of the coal mine underground water reservoir (10) using the dam monitoring devices (32) include: A surface displacement sensor (321) and a borehole stress gauge (322) are installed on the coal pillar dam body (13) to obtain the dam body parameters of the coal pillar dam body (13). Surface strain gauges (323) and piezometers (324) are installed on the artificial dam body (12) to obtain the dam body parameters of the artificial dam body (12). The dam parameters are determined based on the dam parameters of the coal pillar dam (13) and the dam parameters of the artificial dam (12).

4. The method for monitoring and jointly utilizing underground water reservoirs in coal mines according to claim 1, characterized in that, The warning thresholds include water level warning thresholds and dam body warning thresholds. The step of comparing the obtained calling parameters of each of the coal mine underground reservoirs (10) with the warning thresholds of each of the coal mine underground reservoirs (10), and calling water from the coal mine underground reservoirs (10) among multiple coal mine underground reservoirs (10) according to the comparison results includes: When it is determined that the water level parameter of any of the coal mine underground water reservoirs (10) reaches the water level warning threshold or the dam body parameter of any of the coal mine underground water reservoirs (10) reaches the dam body warning threshold, the water in the coal mine underground water reservoir (10) is discharged into the coal mine underground water reservoir (10) whose water level parameter has not reached the water level warning threshold and whose dam body parameter has not reached the dam body warning threshold.

5. The method for monitoring and jointly managing underground water reservoirs in coal mines according to any one of claims 1 to 4, characterized in that, The warning threshold includes a water quality warning threshold. The step of comparing the obtained calling parameters of each of the coal mine underground water reservoirs (10) with the warning threshold of each of the coal mine underground water reservoirs (10), and calling water from the coal mine underground water reservoirs (10) among multiple coal mine underground water reservoirs (10) according to the comparison result, further includes: When it is determined that the water quality parameter of any of the coal mine underground water reservoirs (10) reaches the water quality warning threshold, the water quality parameter of the coal mine underground water reservoir (10) is compared with the water quality parameters of other coal mine underground water reservoirs (10), and the water of the coal mine underground water reservoir (10) is mixed and neutralized with the water of one or more other coal mine underground water reservoirs (10) according to the comparison result.

6. The method for monitoring and jointly utilizing underground water reservoirs in coal mines according to claim 5, characterized in that, The water quality early warning thresholds include the pH value water quality early warning threshold and the Cl value water quality early warning threshold. - The water quality warning threshold for ion indicators, when it is determined that the water quality parameter of each of the coal mine underground water reservoirs (10) reaches the water quality warning threshold, the water quality parameter of the coal mine underground water reservoir (10) is compared with the water quality parameter of other coal mine underground water reservoirs (10), and the step of adjusting and neutralizing the water of the coal mine underground water reservoir (10) with the water of one or more other coal mine underground water reservoirs (10) according to the comparison result includes: Obtain the Ph value and Cl value of each of the underground water reservoirs (10) in the coal mine. - Ion indicators, when determining that the pH value of any of the coal mine underground water reservoirs (10) reaches the pH value water quality early warning threshold and / or Cl - The ion index reaches the Cl - When the water quality warning threshold for ion indicators is reached, the pH value and / or Cl value of the underground water reservoir (10) of the coal mine are used. - Ion indices and pH values ​​and / or Cl values ​​of other coal mine underground water reservoirs (10) mentioned above - Ion indices are compared, and the water in the coal mine underground water reservoir (10) is mixed and neutralized with the water in one or more other coal mine underground water reservoirs (10) based on the comparison results.

7. The method for monitoring and jointly managing underground water reservoirs in coal mines according to any one of claims 1 to 4, characterized in that, The step of comparing the obtained call parameters of each of the coal mine underground water reservoirs (10) with the early warning threshold of each of the coal mine underground water reservoirs (10), and calling the water in the coal mine underground water reservoirs (10) among the multiple coal mine underground water reservoirs (10) according to the comparison result, further includes: When it is determined that the calling parameter of any of the underground water reservoirs (10) in the coal mine reaches the warning threshold of the underground water reservoir (10), the monitoring system issues a warning signal.

8. The method for monitoring and jointly managing underground water reservoirs in coal mines according to any one of claims 1 to 4, characterized in that, The method for monitoring and jointly utilizing underground water reservoirs in coal mines also includes: The water level parameters of each coal mine underground water reservoir (10) are compared with the emergency water discharge value of each coal mine underground water reservoir (10), and the dam parameters of each coal mine underground water reservoir (10) are compared with the emergency water discharge value of the dam body of each coal mine underground water reservoir (10). When the water level parameters of each coal mine underground water reservoir (10) reach the emergency water discharge value and / or the dam parameters of each coal mine underground water reservoir (10) reach the emergency water discharge value of the dam body, each coal mine underground water reservoir (10) performs a water discharge operation.

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