Emergency drainage dam body and emergency disposal method for coal mine underground reservoir

Abstract

The invention relates to the technical field of coal mining water resource protection and utilization, and provides a coal mine underground reservoir emergency drainage dam body and an emergency disposal method. The emergency drainage dam body of the underground reservoir of the coal mine comprises a dam body frame, a dam body and a dam body, the water retaining wall is arranged at the water drainage opening and used for retaining water and starting water drainage; and the ejection system is arranged on the dam body frame and connected with the retention wall, and the ejection system is used for ejecting the retention wall to be separated from the dam body frame after receiving the emergency water drainage instruction so as to start emergency water drainage. According to the emergency drainage dam body of the coal mine underground reservoir, short-time, mass and rapid drainage can be achieved, the safety risk level is reduced, and the damage degree of the dam body of the coal mine underground reservoir is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of water resource protection and utilization in coal mining, and in particular to an emergency water discharge dam body and an emergency disposal method for an underground water reservoir in a coal mine. Background Art

[0002] Currently, underground coal mine reservoirs are new hydraulic structures that use mined-out areas to store water, utilize coal pillars and artificial dam bodies to form a dam body to retain water, and are equipped with water diversion facilities. During operation, underground coal mine reservoirs can be susceptible to hazards such as excessive water replenishment and strong earthquake disturbances, which can trigger sudden water level overflows and sudden stress changes in the dam body, posing a risk of dam failure.

[0003] To ensure the overall safety of underground coal mine reservoirs, relevant technologies require prompt and rapid emergency water release to minimize safety risks and reduce damage to the dam. However, emergency water release devices installed on artificial dams release water through sluice holes, resulting in limited capacity. This makes it impossible to quickly and efficiently release large amounts of water in the event of disasters such as heavy water replenishment or strong earthquake disturbances, effectively preventing safety risks from being reduced in the shortest possible time. Summary of the Invention

[0004] In order to solve the technical problem that the above-mentioned coal mine underground reservoir cannot carry out rapid and large-scale emergency water discharge when disasters such as strong water replenishment and strong earthquake disturbance occur, the first aspect of this application proposes an emergency water discharge dam body for the coal mine underground reservoir.

[0005] The second aspect of the present application proposes an emergency disposal method for coal mine underground reservoirs.

[0006] In view of this, the first aspect of this application proposes an emergency discharge dam body for a coal mine underground reservoir, comprising: a dam body frame, including a discharge port; a retaining wall, arranged at the discharge port, the retaining wall being used to retain water and start discharge; an ejection system, arranged on the dam body frame and connected to the retaining wall, the ejection system being used to eject the retaining wall from the dam body frame after receiving an emergency discharge command to start emergency discharge.

[0007] In combination with the first aspect, in some feasible methods, the ejection system includes: an ejection device, which is arranged between the dam frame and the retaining wall; an air pump, which is connected to the ejection device; and a control and signal device, which is connected to the air pump. When the control and signal device receives an emergency water discharge command, it controls the air pump to compress and release high-pressure gas, and the high-pressure gas is ejected by the ejection device to push the retaining wall away from the dam frame.

[0008] In combination with the first aspect, in some feasible methods, the emergency discharge dam of the coal mine underground reservoir also includes: a multi-parameter joint monitoring system, which is arranged on the dam frame and electrically connected to the control and signal device, and is used to monitor the water storage pressure and the stress, deformation, and vibration parameters of the dam body. When the monitoring value exceeds the warning threshold, an emergency discharge command is issued.

[0009] In combination with the first aspect, in some feasible embodiments, the multi-parameter joint monitoring system includes: a sensor component, the sensor component including at least one of a pressure box sensor, a strain sensor, and a microseismic signal sensor; a data acquisition instrument, connected to the sensor component, for receiving parameter signals collected by the sensor component.

[0010] In combination with the first aspect, in some feasible methods, the multi-parameter joint monitoring system also includes: an evaluation system, connected to the data acquisition instrument, the evaluation system is used to jointly analyze the multiple parameters received by the data acquisition instrument and give a warning value, and issue an emergency water discharge instruction when the warning value exceeds the safety threshold.

[0011] In combination with the first aspect, in some feasible methods, the emergency discharge dam body of the coal mine underground reservoir also includes: a buffer and closing system, one end of the buffer and closing system is connected to the retaining wall, which is used to buffer the impact force after the retaining wall is ejected, and to reset the retaining wall after the discharge is completed.

[0012] In combination with the first aspect, in some feasible embodiments, the buffering and closing system includes: a base; a cylinder, fixedly arranged on the base, the cylinder including a buffer cavity; a spring, arranged in the buffer cavity, one end of the spring is fixedly connected to the buffer cavity; a telescopic rod, partially arranged in the buffer cavity, one end of the telescopic rod is connected to the other end of the spring, and the other end of the telescopic rod abuts against the water retaining wall; a hydraulic cylinder, used to drive the telescopic rod to perform telescopic movement.

[0013] In combination with the first aspect, in some feasible methods, the emergency discharge dam of the coal mine underground reservoir also includes: a sand prevention and mud filtering system, which is arranged on the water side of the dam frame to intercept rock collapse in the goaf and filter silt.

[0014] In combination with the first aspect, in some feasible embodiments, the sand control and mud filtering system includes: a cutoff wall for intercepting collapsed rocks in the goaf; and a wire filter screen provided on one side of the cutoff wall for filtering mud.

[0015] The second aspect of the present application provides an emergency disposal method for a coal mine underground reservoir, which is used to perform emergency disposal on a coal mine underground reservoir using the emergency discharge dam of the coal mine underground reservoir in any of the above-mentioned technical solutions. The method includes: using a multi-parameter joint monitoring system to monitor the water storage pressure and the stress, deformation, and vibration parameters of the dam body in real time, and issuing an emergency discharge command when the monitoring value exceeds the warning threshold; when the ejection system receives the emergency discharge command, the ejection retaining wall starts the emergency discharge; after the retaining wall is ejected, the buffer device in the buffer and closing system plays a buffering role, guiding the retaining wall to stop at a fixed position; after the emergency discharge of the dam body is completed, the closing device in the buffer and closing system is started to push the retaining wall back to its original position and connect it to the ejection system.

[0016] Compared with the existing technology, this application has the following technical effects:

[0017] The coal mine underground reservoir emergency discharge dam and emergency disposal method provided in this application can achieve short-time, large-scale and rapid water discharge, reduce the safety risk level, and reduce the degree of damage to the coal mine underground reservoir dam.

[0018] The multi-parameter joint monitoring system provided in this application can monitor the water storage pressure and dam body stress, deformation, vibration and other parameters in real time. The evaluation model can perform multi-parameter joint analysis and give early warning values. When the early warning value exceeds the safety threshold, an emergency water discharge command will be issued.

[0019] Additional aspects and advantages of the present application will become apparent in the following description or may be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0021] Figure 1 A schematic diagram of an emergency water discharge dam of a coal mine underground reservoir in one embodiment of the present application is shown;

[0022] Figure 2 Shown Figure 1 Schematic diagram of the discharge state of the emergency discharge dam of the coal mine underground reservoir in the embodiment;

[0023] Figure 3 Shown Figure 1 A schematic structural diagram of the buffer and closure system in an embodiment;

[0024] Figure 4 A schematic diagram showing an anchor rod of an emergency discharge dam of a coal mine underground reservoir in one embodiment of the present application is shown;

[0025] Figure 5 Shown Figure 1A schematic structural diagram of the sand control and mud filtration system in the embodiment;

[0026] Figure 6 A schematic flow chart of a method for emergency disposal of a coal mine underground reservoir dam in one embodiment of the present application is shown;

[0027] Figure 7 A schematic diagram of the emergency water discharge process of a coal mine underground reservoir dam in one embodiment of the present application is shown.

[0028] in, Figures 1 to 5 The corresponding relationship between the reference numerals and component names is as follows:

[0029] 100 emergency spillway body, 110 coal pillar dam body, 112 anchor rod, 120 dam body frame, 122 spillway, 130 retaining wall, 140 ejection system, 142 ejection device, 143 air pump, 146 control and signal device, 150 multi-parameter joint monitoring system, 152 sensor assembly, 154 data acquisition instrument, 160 buffer and closing system, 161 control system, 162 base, 164 cylinder, 166 spring, 168 telescopic rod, 169 hydraulic cylinder, 170 sand and mud control system, 172 cutoff wall, 174 wire filter. DETAILED DESCRIPTION

[0030] In order to more clearly understand the above-mentioned objects, features and advantages of the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other in the absence of conflict.

[0031] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0032] Refer to the following Figures 1 to 7 The coal mine underground water reservoir emergency discharge dam body 100 and emergency disposal method according to some embodiments of the present application are described.

[0033] like Figure 1 、 Figure 2 and Figure 3 As shown, the first aspect of the present application proposes an emergency discharge dam body 100 for a coal mine underground reservoir, comprising: a dam body frame 120, including a discharge port 122; a retaining wall 130, arranged at the discharge port 122, the retaining wall 130 being used to retain water and start discharge; an ejection system 140, arranged at the dam body frame 120 and connected to the retaining wall 130, the ejection system 140 being used to eject the retaining wall 130 from the dam body frame 120 after receiving an emergency discharge command to start emergency discharge.

[0034] The coal mine underground reservoir emergency drainage dam body 100 provided by the application comprises a dam body frame 120, a water retaining wall 130 and an ejection system 140. By arranging the ejection system 140 connected with the water retaining wall 130, after receiving an emergency drainage instruction, the ejection system 140 can quickly make the water retaining wall 130 separate from the dam body frame 120, so as to quickly open the drainage opening 122, realize the efficient emergency drainage function, and help to timely reduce the water level of the underground reservoir and reduce the pressure of the reservoir when the coal mine underground reservoir encounters an emergency (such as a sharp rise in the water level of the reservoir, a risk of dam collapse, etc.), and ensure the safety of the coal mine underground space and surrounding facilities.

[0035] The dam body frame 120 serves as the main structure, provides overall support and sets the drainage opening 122. The water retaining wall 130 is used to bear the dual functions of water retaining and opening drainage, effectively blocks the water flow under normal circumstances, and can be quickly ejected to open drainage in an emergency. The ejection system 140 as a key driving component can timely respond to the emergency drainage instruction, realize the quick separation of the water retaining wall 130, and the dam body frame 120, the water retaining wall 130 and the ejection system 140 work cooperatively, which ensures the reliable realization of the function of the emergency drainage dam body 100.

[0036] The emergency drainage device in the related art is installed on an artificial dam body, and drains water through a drainage hole, which has limited drainage capacity and cannot perform quick and large emergency drainage when disasters such as strong water replenishment and strong earthquake disturbance occur. The coal mine underground reservoir emergency drainage dam body 100 provided by the application realizes automatic emergency drainage opening through the ejection system 140, has a fast response speed, can respond to an emergency in the shortest time, and avoids the loss caused by the inability to perform quick and large emergency drainage when disasters such as strong water replenishment and strong earthquake disturbance occur. The application can reduce the safety risk level in the shortest time, and improves the timeliness and effectiveness of responding to the emergency of the coal mine underground reservoir.

[0037] As shown in Figure 1 , Figure 2 and Figure 3 , in some embodiments provided by the application, the ejection system 140 comprises: an ejection device 142 arranged between the dam body frame 120 and the water retaining wall 130; a gas pump 143 connected with the ejection device 142; a control and signal device 146 connected with the gas pump 143, which controls the gas pump 143 to compress and release high-pressure gas when receiving an emergency drainage instruction, and the high-pressure gas is sprayed out of the ejection device 142 to push the water retaining wall 130 to separate from the dam body frame 120.

[0038] In this embodiment, ejection system 140 includes an ejection device 142, an air pump 143, and a control and signaling device 146. Ejection system 140 is powered by high-pressure air pump 143, which is precisely controlled by control and signaling device 146 to compress and release high-pressure gas. Air pump 143 compresses and releases the high-pressure gas, which is then converted by ejection device 142 into kinetic energy that propels retaining wall 130 away from dam frame 120. This energy conversion process is relatively direct and efficient, reducing energy loss during the conversion process.

[0039] When an emergency water discharge command is received, it can respond quickly and eject high-pressure gas from the ejection device 142 in a very short time, providing timely and strong power for the ejection and separation of the retaining wall 130, ensuring that the emergency water discharge function is quickly activated in an emergency, shortening the time interval from the issuance of the command to the opening of the retaining wall 130, and effectively improving the response speed to sudden dangerous situations.

[0040] The ejection device 142 is arranged between the dam frame 120 and the retaining wall 130, so that the entire ejection system 140 can be well integrated into the dam structure, does not take up too much extra space, and is convenient for installation and layout within the limited space of the coal mine underground reservoir. The control and signal device 146 is responsible for receiving emergency water discharge instructions and accurately controlling the operation of the air pump 143. Through intelligent control logic, it can accurately judge the validity of the instructions and control the air pump 143 to compress and release high-pressure gas according to the preset program to ensure the accurate execution of the ejection action. The intelligent control method reduces the errors and delays that may be caused by human intervention, improves the operational reliability of the ejection system 140 in emergency situations, and ensures the stable performance of the emergency water discharge function.

[0041] like Figure 1 As shown, in some embodiments provided in the present application, the coal mine underground reservoir emergency discharge dam body 100 also includes: a multi-parameter joint monitoring system 150, which is arranged on the dam body frame 120 and is electrically connected to the control and signal device 146, and is used to monitor the water storage pressure and the dam body stress, deformation, and vibration parameters, and when the monitoring value exceeds the warning threshold, an emergency discharge command is issued.

[0042] In this embodiment, the coal mine underground reservoir emergency discharge dam 100 also includes a multi-parameter joint monitoring system 150. This system can simultaneously monitor multiple key parameters, including water storage pressure, dam stress, deformation, and vibration, in real time. These parameters comprehensively cover potential safety risk factors facing the coal mine underground reservoir dam, and can promptly capture subtle changes in the dam during operation caused by factors such as water level fluctuations, geological activity, and structural aging. This provides rich and accurate data support for dam safety assessments, ensuring comprehensive control of the dam's safety status.

[0043] By setting warning thresholds, the multi-parameter joint monitoring system 150 implements intelligent early warning capabilities. When the monitored value exceeds the warning threshold, the system quickly issues an emergency water release command, automatically triggering the opening of the emergency water release dam 100 without human intervention. This intelligent early warning and emergency response linkage mechanism significantly shortens the time between the discovery of safety hazards and the implementation of emergency measures, effectively reducing the risk of major safety accidents such as dam failure and overtopping that may be caused by untimely response, and ensuring the safety of the coal mine underground reservoir and surrounding facilities.

[0044] The multi-parameter data acquired by the monitoring system is analyzed and processed to produce a detailed safety assessment report, visually presenting the dam's current safety status and potential risks. This provides managers with a scientific and accurate basis for decision-making, enabling them to formulate appropriate maintenance, reinforcement, or water release plans based on actual conditions, avoiding blind operations and wasteful resources, and improving the scientific nature and effectiveness of coal mine underground reservoir safety management.

[0045] like Figure 1 As shown, in some embodiments provided in the present application, the multi-parameter joint monitoring system 150 includes: a sensor assembly 152, the sensor assembly 152 includes at least one of a pressure box sensor, a strain sensor, and a microseismic signal sensor; a data acquisition instrument 154, connected to the sensor assembly 152, for receiving parameter signals collected by the sensor assembly 152.

[0046] In this embodiment, the multi-parameter joint monitoring system 150 includes a sensor assembly 152 and a data acquisition instrument 154. Specifically, the sensor assembly 152 includes at least one of a pressure cell sensor, a strain sensor, and a microseismic signal sensor.

[0047] Specifically, pressure cell sensors can accurately measure the water pressure within the dam body of a coal mine's underground reservoir, including both hydrostatic pressure and dynamic pressure changes caused by water level fluctuations and geological movements. This helps promptly identify potential safety risks caused by abnormal pressure, such as dam leakage and accelerated structural deformation. Strain sensors monitor the strain of the dam material in real time, capturing minute deformations caused by stress. Analysis of strain data at different locations can determine whether the stress distribution within the dam is uniform and whether there are localized stress concentrations. Microseismic signal sensors are specifically designed to detect minute vibration signals within the dam body and surrounding geological structures. The underground environment of a coal mine is complex, potentially subject to microseismic activity caused by tectonic movements and groundwater level fluctuations. These microseismic signals often indicate potential geological disaster risks. The three sensors work together to monitor the dam body and its surrounding environment from different angles, achieving precise sensing of multiple parameters and providing a comprehensive and detailed picture of the actual operating status and safety of the coal mine's underground reservoir dam.

[0048] The data acquisition instrument 154 serves as a bridge between the sensor assembly 152 and the subsequent processing system, and can efficiently receive the parameter signals collected from the sensor assembly 152. The data acquisition instrument 154 has high-precision data acquisition capabilities, which can ensure that the weak signals and subtle changes detected by the sensor can be accurately captured and recorded, avoiding misjudgment of the safety status of the dam body due to data acquisition errors. The data acquisition instrument 154 can realize real-time data transmission and send the collected various parameter signals to the data processing terminal quickly and stably. It ensures that during the operation of the coal mine underground water reservoir, once an abnormal situation occurs, the relevant data can be fed back to the management system in the first time, providing data support for rapid decision-making and emergency response, greatly shortening the time interval from discovering the abnormality to taking measures, and effectively reducing the possibility of safety accidents.

[0049] In some embodiments provided in the present application, the multi-parameter joint monitoring system 150 also includes: an evaluation system, which is connected to the data acquisition instrument 154, and the evaluation system is used to jointly analyze the multiple parameters received by the data acquisition instrument 154 and give a warning value, and issue an emergency water discharge instruction when the warning value exceeds the safety threshold.

[0050] In this embodiment, the multi-parameter joint monitoring system 150 further includes an evaluation system that can receive various parameter signals sent by the data collector 154 and perform joint analysis.

[0051] Specifically, after receiving signal data such as water pressure, stress, deformation, and vibration, an algorithm assigns different weights to different types of signals. The weights for water pressure and stress parameters are greater than those for deformation and vibration parameters. An evaluation model performs a multi-parameter real-time analysis to determine a warning value. When the warning value exceeds a safety threshold, the emergency ejection retaining wall 130 is activated to release water. The emergency release is terminated by forcefully closing the retaining wall 130 until the warning value falls below the safety threshold.

[0052] Optionally, the weights of water pressure, stress, deformation, and vibration decrease in order. For example, the weight of the water pressure parameter is 35%, the weight of the stress parameter is 30%, the weight of the deformation parameter is 25%, and the weight of the vibration parameter is 20%.

[0053] Through multi-parameter joint analysis, the limitations of single-parameter analysis are overcome, enabling a more comprehensive capture of dam status changes, accurate assessment of safety trends, and effective avoidance of misjudgments and omissions, enabling early identification of potential risks. The system receives multi-parameter data from the data acquisition device 154 in real time, rapidly analyzes and issues warning values. Once safety thresholds are exceeded, an emergency water release command is automatically issued without manual intervention, significantly shortening emergency response time and reducing the probability of accidents and losses.

[0054] like Figure 1 、 Figure 2 and Figure 3 As shown, in some embodiments provided in the present application, the coal mine underground reservoir emergency discharge dam body 100 also includes: a buffer and closing system 160, one end of the buffer and closing system 160 is connected to the retaining wall 130, which is used to buffer the impact force of the retaining wall 130 after the ejection, and to reset the retaining wall 130 after the discharge is completed.

[0055] In this embodiment, the coal mine underground reservoir emergency discharge dam 100 also includes a buffering and closure system 160. This system is connected to the retaining wall 130. When the retaining wall 130 ejects during emergency discharge, the high-speed motion of the retaining wall 130 generates a significant impact force. Leveraging its inherent elasticity and damping properties, the buffering and closure system 160 effectively absorbs, disperses, and weakens this impact force, preventing direct, rigid collisions between the retaining wall 130 and surrounding structures or the dam frame 120. This prevents structural damage such as deformation and cracking of the retaining wall 130 due to the intense impact, thereby extending the service life of the retaining wall 130.

[0056] After the water discharge task is completed, the buffer and closing system 160 can use the principles of elastic potential energy, mechanical transmission, etc. to automatically pull the retaining wall 130 back to its original position and reset it without human intervention, quickly restoring the dam body to a closed state, ensuring the normal water storage function of the underground reservoir, reducing time delays and operational errors caused by manual reset, and improving the efficiency and reliability of emergency water discharge and resumption of operation of the coal mine underground reservoir.

[0057] like Figure 1 、 Figure 2 and Figure 3 As shown, in some embodiments provided in the present application, the buffering and closing system 160 includes: a base 162; a cylinder 164, fixedly disposed on the base 162, and the cylinder 164 includes a buffer cavity; a spring 166, disposed in the buffer cavity, and one end of the spring 166 is fixedly connected to the buffer cavity; a telescopic rod 168, partially disposed in the buffer cavity, one end of the telescopic rod 168 is connected to the other end of the spring 166, and the other end of the telescopic rod 168 abuts against the retaining wall 130; a hydraulic cylinder 169, used to drive the telescopic rod 168 to perform telescopic movement.

[0058] In this embodiment, the cushioning and closing system 160 includes a base 162 , a cylinder 164 , a spring 166 , a telescopic rod 168 , and a hydraulic cylinder 169 .

[0059] When the water retaining wall 130 is ejected, its impact force is transmitted to the spring 166 through the telescopic rod 168. The spring 166 absorbs energy by its own elastic deformation. The buffer cavity provides space for the deformation of the spring 166, which can effectively disperse and buffer the impact force, prevent the water retaining wall 130 from being damaged by the instantaneous strong impact, reduce the risk of structural deformation and fracture, and ensure the structural safety of the water retaining wall 130 during emergency water discharge.

[0060] Hydraulic cylinder 169, serving as a power source, precisely controls the extension and retraction of telescopic rod 168. Once water is released, hydraulic cylinder 169 drives telescopic rod 168 back, pulling retaining wall 130 back into position and resetting it. This automated and precise repositioning reduces manual error, quickly restores the dam's sealed state, and ensures the proper water storage function of the coal mine's underground reservoir.

[0061] The base 162 is fixedly connected to the cylinder 164, providing a stable support foundation for the entire buffer and closing system 160, ensuring that the system is stable and reliable during the ejection and reset process of the retaining wall 130, maintaining the overall stability of the system, and ensuring the smooth completion of the buffer and reset actions, thereby ensuring the stability of emergency water discharge and normal operation of the coal mine underground reservoir.

[0062] like Figure 1 、 Figure 2 and Figure 5 As shown, in some embodiments provided in the present application, the coal mine underground reservoir emergency discharge dam body 100 also includes: a sand control and mud filtering system 170, which is arranged on the water side of the dam body frame 120, and is used to intercept rock collapse in the goaf and filter silt.

[0063] In this embodiment, the coal mine underground reservoir emergency discharge dam 100 also includes a sand and mud filter system 170. Because the collapsed rocks in the coal mine goaf vary in shape and size, if they flow into the dam discharge port 122 with the water flow, they can easily cause blockage and paralyze the discharge system. The sand and mud filter system 170 is located on the waterfront. Its structures, such as gratings and filter holes, firmly intercept large-sized rocks, ensuring that the discharge channel remains unobstructed and the emergency discharge function is always operational, buying time to respond to sudden flooding.

[0064] Silt contains a high content of fine particles, which can seep into the dam with the water flow, filling structural gaps, corroding materials, and undermining its stability. The 170 Sand and Mud Filter System uses multiple layers of filter screens or special filter media to efficiently filter out silt, significantly reducing the sand content of the water flow. This mitigates scouring and erosion of the dam structure, slows dam aging, extends its service life, reduces maintenance costs and safety risks, and ensures the overall safety of underground coal mine reservoirs.

[0065] like Figure 5As shown, in some embodiments provided in the present application, the sand control and mud filtering system 170 includes: a cutoff wall 172 for intercepting rock collapse in the goaf; and a wire filter 174 provided on one side of the cutoff wall 172 for filtering mud.

[0066] In this embodiment, the sand and mud control and filtration system 170 includes a cutoff wall 172 and a wire filter 174. As the first line of defense, the cutoff wall 172, with its high-strength structure, directly resists the impact of large-sized rocks collapsing from the goaf. Its rigidity can withstand high-speed projectiles of sharp rocks, preventing rocks from penetrating or cracking the waterside frame of the dam body, and preventing the entrance of the drainage channel from being blocked by large rocks, thus ensuring the basic conditions for subsequent drainage operations.

[0067] The wire mesh 174, with its flexible woven structure, forms a dense filter layer, providing a secondary silt interception behind the cutoff wall 172. Its high-density mesh can filter out micron-sized sediment particles, and its flexible material adaptively adjusts its pore shape with water flow fluctuations, alleviating sediment accumulation pressure and reducing the probability of localized filter blockage. It also utilizes the shear force of the water flow to flush away surface sediment, extending the effective filtration time of the filter.

[0068] The cutoff wall 172 and the wire filter 174 form a "coarse first, fine later" graded filtration system. After the large rocks are intercepted by the cutoff wall 172, only the surface deposits need to be cleaned regularly; the mud and sand intercepted by the wire filter 174 can be concentrated on the water-facing side of the filter, and can be quickly cleaned through backwashing or mechanical scraping, avoiding the shutdown of the entire system for maintenance and improving the emergency response efficiency of the spillway body.

[0069] like Figure 6 and Figure 7 As shown, the second aspect of the present application provides a method for emergency disposal of a coal mine underground reservoir, which is used to perform emergency disposal of the coal mine underground reservoir using the emergency discharge dam of the coal mine underground reservoir in any of the above embodiments, and the method includes the following steps:

[0070] S202: Using a multi-parameter joint monitoring system, the water storage pressure and dam body stress, deformation, and vibration parameters are monitored in real time. When the monitored values ​​exceed the warning threshold, an emergency water release command is issued;

[0071] S204: When the ejection system receives the emergency water release command, the ejection retaining wall starts the emergency water release;

[0072] S206: After the retaining wall is ejected, the buffer device in the buffer and closing system acts as a buffer to guide the retaining wall to stop at a fixed position;

[0073] S208: After the emergency water discharge of the dam body is completed, the closing device in the buffer and closing system is activated to push the retaining wall back to its original position and connect it to the ejection system.

[0074] The coal mine underground reservoir emergency response method provided in this application utilizes a multi-parameter joint monitoring system to track key parameters such as water storage pressure, dam body stress, deformation and vibration in real time, and uses preset early warning thresholds to accurately identify risks. When hidden dangers first appear, emergency water discharge instructions are issued in a timely manner to nip accidents in the bud and reduce the probability and degree of disaster occurrence.

[0075] The ejection system responds to emergency commands and quickly ejects the retaining wall to start draining water, which can release the accumulated water in the reservoir in a short time, effectively relieve the pressure on the dam body, avoid major safety accidents such as dam collapse due to excessive water level or excessive pressure, and ensure the safety of the coal mine underground reservoir and surrounding areas.

[0076] The buffer device cushions the impact force of the retaining wall when it is ejected, protecting the dam structure; after the water discharge is completed, the closing device pushes the retaining wall back to its original position and connects to the ejection system, quickly restoring the closed state of the dam body, ensuring the normal water storage function of the reservoir, and enabling the coal mine underground reservoir to quickly resume stable operation after emergency disposal.

[0077] In a specific embodiment, Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 As shown, the present application provides an emergency discharge dam body 100 for a coal mine underground reservoir, comprising: a dam frame 120, a retaining wall 130, an ejection system 140, a buffer and closure system 160, a sand and mud prevention system 170, and a multi-parameter joint monitoring system 150. The dam frame 120 is a reinforced concrete structure, embedded in the coal pillar dam body 110, and fixed by anchor rods 112. The retaining wall 130 is a reinforced concrete structure. The ejection system 140 includes a control and signal device 146, a high-pressure air pump, and an ejection device 142, which are installed on the retaining wall 130 and are used to lock and eject the retaining wall 130 with the dam frame 120. The buffer and closure system 160 includes a control system 161, a telescopic rod 168, a spring 166, a hydraulic cylinder 169, and a base 162. The two ends of the buffer and closure system 160 are respectively connected to the retaining wall 130 and the coal rock wall. The sand and mud control and filtration system 170, consisting of a water cutoff wall 172 and a wire mesh filter 174, is embedded in the coal pillar dam 110 to prevent sand and filter water. The multi-parameter joint monitoring system 150 includes sensor components 152 (e.g., pressure cell sensors, strain sensors, and microseismic signal sensors) and a data acquisition device 154, which monitor parameters such as water pressure, stress, deformation, and vibration. The evaluation model performs multi-parameter joint analysis and generates warning values. When the warning value exceeds a safety threshold, an emergency water release command is issued.

[0078] like Figure 6 and Figure 7 This application also provides an emergency disposal method for the emergency discharge dam of a coal mine underground reservoir, and the specific implementation plan is as follows:

[0079] The sand prevention and silt filtering system separates and filters the falling rock blocks in the goaf through the water retaining wall and steel wire filter screen, thereby reducing the impurities of the mine water and ensuring that there is no silt accumulation in front of the dam body frame and the water retaining wall. The multi-parameter joint monitoring system monitors parameters such as water pressure, stress, deformation, vibration, etc. through sensor components (such as pressure box sensors, strain sensors, microseismic signal sensors), collects data by a data acquisition instrument and transmits the data to analysis software, and the software analyzes the multi-parameters jointly and gives a warning value. When the warning value exceeds the safety threshold value and there is a major risk hidden danger to the reservoir safety, an emergency drainage instruction is issued.

[0080] When the control and signal device of the ejection system receives the emergency drainage instruction, the high-pressure gas pump is controlled to compress and release high-pressure gas, the high-pressure gas is ejected from the tip of the ejection device, the water retaining wall is pushed to quickly separate from the dam body frame, and rapid drainage is realized. After the water retaining wall is ejected by the ejection system, the telescopic rod of the buffer and closing system compresses the buffer spring to gradually reduce the ejection kinetic energy, so that the water retaining wall stops at a fixed position. When the warning value given by the multi-parameter joint monitoring system is reduced to below the safety threshold value and the drainage needs to be ended, the control system of the buffer and closing system issues a closing instruction, the hydraulic oil cylinder drives the telescopic rod to push the water retaining wall back into the dam body frame, and the drainage opening is closed.

[0081] In the present application, the term "a plurality of" refers to two or more, unless otherwise explicitly limited. The terms "mounting", "connected", "connection", "fixed", and the like should be interpreted broadly, for example, "connection" can be fixed connection, or detachable connection, or integrally connected; "connected" can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0082] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "a specific embodiment", and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0083] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An emergency discharge dam for a coal mine underground reservoir, characterized in that: include: dam frame, including sluice gates; A retaining wall is provided at the drain outlet, and is used for retaining water and opening the drain outlet; The ejection system is arranged on the dam body frame and connected to the retaining wall. The ejection system is used to eject the retaining wall from the dam body frame after receiving an emergency water discharge instruction to start emergency water discharge.

2. The emergency discharge dam body of the coal mine underground reservoir according to claim 1, characterized in that: The ejection system includes: An ejection device is provided between the dam frame and the retaining wall; an air pump connected to the ejection device; A control and signal device is connected to the air pump. When receiving an emergency water release instruction, the control and signal device controls the air pump to compress and release high-pressure gas. The high-pressure gas is ejected by the ejection device to push the retaining wall away from the dam frame.

3. The emergency discharge dam of the coal mine underground reservoir according to claim 2, characterized in that: Also includes: A multi-parameter joint monitoring system is arranged on the dam frame and electrically connected to the control and signal device, and is used to monitor the water storage pressure and the stress, deformation, and vibration parameters of the dam body. When the monitoring value exceeds the warning threshold, the emergency water release instruction is issued.

4. The emergency discharge dam of the coal mine underground reservoir according to claim 3, characterized in that: The multi-parameter joint monitoring system includes: A sensor assembly, wherein the sensor assembly includes at least one of a pressure cell sensor, a strain sensor, and a microseismic signal sensor; The data acquisition instrument is connected to the sensor assembly and is used to receive the parameter signal collected by the sensor assembly.

5. The emergency discharge dam of the coal mine underground reservoir according to claim 4, characterized in that: The multi-parameter joint monitoring system further includes: An evaluation system is connected to the data acquisition instrument, and is used to jointly analyze the multiple parameters received by the data acquisition instrument and provide an early warning value. When the early warning value exceeds a safety threshold, an emergency water release instruction is issued.

6. The emergency discharge dam of the coal mine underground reservoir according to any one of claims 1 to 5, characterized in that: Also includes: A buffer and closing system, one end of which is connected to the water retaining wall, is used to buffer the impact force of the water retaining wall after it is ejected, and to reset the water retaining wall after the water is discharged.

7. The emergency discharge dam of the coal mine underground reservoir according to claim 6, characterized in that: The cushioning and closure system comprises: base; A cylinder body is fixedly arranged on the base, and the cylinder body includes a buffer cavity; a spring, disposed in the buffer cavity, one end of the spring being fixedly connected to the buffer cavity; a telescopic rod, partially disposed in the buffer cavity, one end of the telescopic rod being connected to the other end of the spring, and the other end of the telescopic rod being in contact with the water retaining wall; The hydraulic cylinder is used to drive the telescopic rod to perform telescopic movement.

8. The emergency discharge dam of a coal mine underground reservoir according to any one of claims 1 to 5, characterized in that: Also includes: The sand prevention and sludge filtering system is arranged on the water side of the dam frame and is used to intercept rock collapse in the goaf and filter silt.

9. The emergency discharge dam of the coal mine underground reservoir according to claim 8, characterized in that: The sand control and mud filtering system comprises: Cutoff wall, used to intercept rock collapse in the goaf; A steel wire filter is arranged on one side of the cutoff wall and is used for filtering silt.

10. A method for emergency disposal of a coal mine underground reservoir, for performing emergency disposal of a coal mine underground reservoir using the emergency discharge dam body of the coal mine underground reservoir according to any one of claims 1 to 9, characterized in that: The method comprises: A multi-parameter joint monitoring system is used to monitor the water storage pressure and dam body stress, deformation, and vibration parameters in real time, and an emergency water release command is issued when the monitored values ​​exceed the warning threshold; When the ejection system receives the emergency water release command, it ejects the retaining wall to start the emergency water release; After the retaining wall is ejected, the buffer device in the buffer and closing system plays a buffering role, guiding the retaining wall to stop at a fixed position; After the emergency water discharge of the dam is completed, the closing device in the buffer and closing system is activated to push the retaining wall back to its original position and connect it to the ejection system.

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