A kind of filling coal mining system and method based on multi-unit alternate operation

Abstract

The application provides a filling coal mining system and method based on multi-unit alternating operation, the system comprising: a control module configured to divide a coal mining face into a plurality of coal mining units; generate an operation time sequence report according to the coal mining time of a coal mining machine, the single filling operation time of a filling pump and the time required for a filling body to reach initial strength; when the control module drives the coal mining machine to perform coal mining operation in a first coal mining unit, simultaneously drive the filling pump and the distributing valve to perform filling operation on a second coal mining unit; when the coal mining machine moves to the second coal mining unit to perform coal mining operation, the filling body in the first coal mining unit enters a maintenance operation state, so that at least one coal mining unit is in a coal mining operation state within a set working time; to solve the problem that in the current filling process, chemical setting accelerators are mainly added to shorten the initial setting time of the filling body, which increases the material cost and causes insufficient strength of the filling body due to rapid dewatering, thereby causing the risk of roof subsidence.

Description

Technical Field

[0001] This application relates to the field of coal mining technology, and in particular to a filling coal mining system and method based on multi-unit alternating operation. Background Technology

[0002] In the field of coal mining, with the gradual depletion of shallow coal resources, deep mining and the development of coal resources under special geological conditions have become an inevitable trend. Backfilling mining, as a green mining technology, can effectively control surface subsidence and improve resource recovery rates by filling the goaf with solid waste or special materials. However, current mining processes generally adopt a unidirectional cycle operation mode of "mining-backfilling": after the coal mining machine completes single or multiple cuts, mining operations must be stopped immediately, and the goaf must be isolated, backfill material injected, and the next mining cycle can only begin after the backfill reaches its designed strength (usually several hours to tens of hours).

[0003] To alleviate the "mining-filling contradiction", the current main approach is to add chemical accelerators (such as calcium chloride and sodium sulfate) or nano-modified materials to try to shorten the initial setting time of the filling body. For example, the initial setting time of some cement-based filling materials can be shortened from 12 hours to 4 hours after adding an early strength agent.

[0004] While chemical accelerators can shorten the setting time, they significantly increase material costs (some additives account for more than 30% of the cost) and may cause insufficient strength of the filling material due to rapid water loss, leading to the risk of roof settlement in the later stage. Summary of the Invention

[0005] This application provides a backfilling coal mining system and method based on multi-unit alternating operation to solve the technical problems in the existing backfilling process, which mainly uses the addition of chemical accelerators to shorten the initial setting time of the backfill, which increases material costs and causes insufficient strength of the backfill due to rapid water loss, leading to the risk of roof settlement in the later stage.

[0006] The first aspect of this application provides a backfilling coal mining system based on multi-unit alternating operation, comprising: The control module is connected to the coal mining machine, the filling pump, and the material placing valve; The control module is configured as follows: The coal mining face is divided into several coal mining units along its length; the coal mining units are separated from each other to form independent coal mining space and filling space; each coal mining unit is equipped with an independent coal mining machine travel area, filling pipeline and material distribution valve, and the filling pump is connected to the filling pipeline; the material distribution valve is located at the filling port of the filling pipeline. A work sequence report is generated based on the coal mining time of the coal mining machine, the single filling operation time of the filling pump, and the time required for the filling material to reach its initial setting strength. The work sequence report is used to display the work status of each coal mining unit in each time period within the set working time. The work status includes: coal mining operation, filling preparation operation, filling operation, and curing operation. According to the work sequence report, drive the coal mining machine, filling pump and material placing valve; Specifically, when the control module drives the coal mining machine to perform the coal mining operation in the first coal mining unit, it simultaneously drives the filling pump and the material distribution valve to perform the filling operation in the second coal mining unit; when the coal mining machine moves to the second coal mining unit to perform the coal mining operation, the filling material in the first coal mining unit enters the curing operation state, so that at least one of the coal mining units is in the coal mining operation state within the set working time.

[0007] In some embodiments, the control module is further configured to: The coal mining machine is driven into the first coal mining unit to carry out coal mining operations. After the coal mining operations are completed, the coal mining machine is driven into the next coal mining unit to carry out coal mining operations until the last coal mining unit. After the coal mining machine enters the last coal mining unit and completes the coal mining operation, the step of driving the coal mining machine into the first coal mining unit to carry out the coal mining operation is repeated to determine the coal mining operation time of each coal mining unit. Based on the coal mining operation time, an operation sequence report is generated according to the backfilling preparation operation time, backfilling operation time, and curing operation time.

[0008] In some embodiments, the control module is further configured to: According to the operation sequence report, the coal mining machine is driven into the corresponding coal mining unit to carry out coal mining operations; the material distribution valve of the corresponding coal mining unit is opened, and the filling pump is started.

[0009] In some embodiments, the control module is further configured to: The flow rate of the filling material is adjusted using the filling pump, and the pressure value of the filling pump is obtained.

[0010] In some embodiments, the control module is further configured to: When the pressure value of the filling pump is greater than the preset pressure threshold, the filling pump is shut down and a warning message is sent to a designated device; the designated device is an electronic device capable of receiving electronic information.

[0011] In some embodiments, the system further includes: An isolation device, the isolation device being connected to the control module, the control module being further configured to: The isolation device is raised during the filling preparation operation.

[0012] In some embodiments, the isolation device includes: A track roadway isolation bracket is used to prevent the filling material from seeping into the track roadway during the filling process. A transport roadway isolation support is provided to prevent the filling material from overflowing from the filling area during the filling process. An I-beam frame is provided between filling units to isolate each filling unit and prevent the filling material from flowing between adjacent filling units.

[0013] In some embodiments, the system further includes: A safety interlock unit is used to shut down the coal mining machine, the filling pump, and the material distribution valve.

[0014] The second aspect of this application provides a backfilling mining method based on multi-unit alternating operation, applied to a backfilling mining system based on multi-unit alternating operation as described in any one of the first aspects above, comprising: The coal mining face is divided into several coal mining units along its length; the coal mining units are separated from each other to form independent coal mining space and filling space; each coal mining unit is equipped with an independent coal mining machine travel area, filling pipeline and material distribution valve, and the filling pump is connected to the filling pipeline; the material distribution valve is set at the filling port of the filling pipeline. A work sequence report is generated based on the coal mining time of the coal mining machine, the single filling operation time of the filling pump, and the time required for the filling material to reach its initial setting strength. The work sequence report is used to display the work status of each coal mining unit within each time period of the set work time. The work status includes: coal mining operation, filling preparation operation, filling operation, and curing operation. In the work sequence report, at least one coal mining unit is in the coal mining operation status within the set work time. According to the operation sequence report, the coal mining machine, filling pump and material distribution valve are driven.

[0015] This application provides a backfilling coal mining system and method based on multi-unit alternating operation. The system includes: a control module connected to a coal mining machine, a backfilling pump, and a material placing valve; the control module is configured to: divide the coal mining face into several coal mining units along its length; the coal mining units are separated from each other, forming independent coal mining spaces and backfilling spaces; each coal mining unit is equipped with an independent coal mining machine travel area, a backfilling pipeline, and a material placing valve; the backfilling pump is connected to the backfilling pipeline; the material placing valve is located at the backfilling port of the backfilling pipeline; and an operation sequence report is generated based on the coal mining time of the coal mining machine, the single backfilling operation time of the backfilling pump, and the time required for the backfill to reach its initial setting strength; the operation sequence report is used to display the backfilling time within each time period of the set working time. The operation status of each coal mining unit includes: coal mining operation, backfilling preparation operation, backfilling operation, and curing operation. Based on the operation sequence report, the coal mining machine, backfilling pump, and material distribution valve are driven. Specifically, when the control module drives the coal mining machine to perform the coal mining operation in the first coal mining unit, it simultaneously drives the backfilling pump and the material distribution valve to perform a backfilling operation in the second coal mining unit. When the coal mining machine moves to the second coal mining unit to perform the coal mining operation, the backfill material in the first coal mining unit enters the curing operation state, ensuring that at least one coal mining unit is in the coal mining operation state within the set working time. This achieves completely parallel operation of coal mining and backfilling processes within the same working face, eliminating equipment waiting time and significantly improving the overall advancement speed and resource utilization rate of the working face. Attached Figure Description

[0016] To more clearly illustrate the technical solution of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a diagram illustrating the application scenario of the filling and mining system based on multi-unit alternating operations in this application. Figure 2 This is a flowchart of the filling coal mining process based on multi-unit alternating operation in this application; Figure 3 This is a timing diagram of the filling coal mining process based on multi-unit alternating operation in this application; Figure 4 This is a schematic diagram of the backfilling coal mining system based on multi-unit alternating operation in this application.

[0018] Explanation of reference numerals in the attached figures: 1-Control module; 2-Coal mining machine; 3-Filling pump; 4-Putting valve; 5-Isolation device; 51-Railway roadway isolation support; 52-Transport roadway isolation support; 53-Isolation I-beam frame between filling units; 6-Safety interlock unit. Detailed Implementation

[0019] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this application.

[0020] In some technologies, the filling process mainly uses the addition of chemical accelerators to shorten the initial setting time of the filling body, which increases material costs and leads to insufficient strength of the filling body due to rapid water loss, causing the risk of roof settlement in the later stage. In order to solve this technical problem, this application provides a filling coal mining system and method based on multi-unit alternating operation. The filling coal mining system and method based on multi-unit alternating operation are described below: like Figure 4 The diagram shown is a structural schematic of the filling coal mining system based on multi-unit alternating operation in this application.

[0021] The first aspect of this application provides a backfilling coal mining system based on multi-unit alternating operation, the system comprising: The control module 1, coal mining machine 2, filling pump 3, material distribution valve 4, isolation device 5, and safety interlock unit 6.

[0022] The control module 1 is connected to the coal mining machine 2, the filling pump 3, the material distribution valve 4, the isolation device 5, and the safety interlock unit 6, respectively, and is used for centralized control and coordinated scheduling of the working sequence of each component. The isolation device 5 further includes: a track roadway isolation support 51, a transport roadway isolation support 52, and an isolation I-beam frame 53 between filling units, which are used to prevent the filling material from seeping into the track roadway, overflowing, and flowing between adjacent units, respectively.

[0023] The control module 1 is configured as follows: The coal mining face is divided into several mining units along its length; these mining units are separated from each other, forming independent mining and filling spaces; each mining unit is equipped with an independent mining machine 2 travel area, a filling pipeline, and a material distribution valve 4; the filling pump 3 is connected to the filling pipeline; the material distribution valve 4 is located at the filling port of the filling pipeline; for example... Figure 1 As shown.

[0024] In this embodiment, the longwall mining face is divided along the dip (length direction) into at least two independently operating mining units, denoted as Unit A, Unit B, Unit C, etc. Figure 2 As shown, each coal mining unit is separated by temporary or permanent isolation devices, forming independent coal mining and filling spaces. Each hydraulic unit is equipped with an independent coal mining machine 2 travel area, hydraulic support group, and independent filling pipeline and material placing valve 4.

[0025] Based on the coal mining time of the coal mining machine 2, the single filling operation time of the filling pump 3, and the time required for the filling body to reach the initial setting strength, an operation sequence report is generated; the operation sequence report is used to display the operation status of each coal mining unit in each time period within the set working time; the operation status includes: coal mining operation, filling preparation operation, filling operation, and curing operation.

[0026] When the control module 1 drives the coal mining machine 2 to perform the coal mining operation in the first coal mining unit, it simultaneously drives the filling pump 3 and the material distribution valve 4 to perform the filling operation in the second coal mining unit. When the coal mining machine 2 moves to the second coal mining unit to perform the coal mining operation, the filling body in the first coal mining unit enters the curing operation state, so that at least one coal mining unit is in the coal mining operation state within the set working time.

[0027] For example, the logic for generating the job timing report is as follows: The control module 1 acquires the single coal mining operation time T of the coal mining machine 2. c Single filling operation time T f (Including preparation time and filling time), and the curing time T required for the filling to reach its initial setting strength. m The control module 1, based on the number N of coal mining units and using a time axis as a reference, automatically arranges the start and end times of each unit through a built-in algorithm, taking the cycle of coal mining, backfilling (including backfilling operations and backfilling preparation operations), and curing as the basic cycle. This ensures that at any given time, at least one unit is in the "coal mining operation" state, and that the operation states of each coal mining unit are continuous and non-conflicting in time, thereby generating the operation sequence report. For example, when N=2, if T... c + T f ≤T m If the timing is arranged, the coal mining machine can operate continuously; when N=3, the timing arrangement is more flexible and can further eliminate waiting gaps.

[0028] Specifically, the control module 1 is further configured as follows: The coal mining machine 2 is driven into the first coal mining unit to carry out coal mining operations. After the coal mining operations are completed, the coal mining machine 2 is driven into the next coal mining unit to carry out coal mining operations until the last coal mining unit.

[0029] After the coal mining machine 2 enters the last coal mining unit and completes the coal mining operation, the step of driving the coal mining machine 2 into the first coal mining unit to carry out the coal mining operation is repeated to determine the coal mining operation time of each coal mining unit.

[0030] Based on the coal mining operation time, an operation sequence report is generated according to the backfilling preparation operation time, backfilling operation time, and curing operation time.

[0031] In this embodiment, an operation sequence report for alternating operations of each coal mining unit is formulated based on the time it takes for the coal mining machine to cut one slice of coal, the time for a single backfilling operation, and the time required for the backfill to reach its initial setting strength. The core principle is to ensure that at any given time, at least one coal mining unit is in a coal mining operation state, while the other coal mining units are in a backfilling operation state or a backfill hardening and curing operation state, respectively.

[0032] It is worth noting that the work sequence report is generated by alternating operations of the two coal mining machines, such as... Figure 2 As shown, if there are three units, the coal mining machine 2 first enters unit A. After the coal mining operation is completed, it enters units B and C in sequence, and then enters unit A again, and so on. After the coal mining operation is completed, the subsequent backfilling and coal mining operation is carried out according to the operation flow of backfilling preparation, backfilling operation, and maintenance operation. When the number of coal mining units is small, there may be a waiting time for the coal mining machine 2 after the cycle is completed. When the number of coal mining units is large, there may be a situation where the first coal mining unit has completed its maintenance operation and is waiting for coal mining operation before the cycle is completed. In this case, the number of coal mining machines 2 can be increased to ensure the efficiency of the backfilling and coal mining operation.

[0033] According to the operation sequence report, the coal mining machine 2, the filling pump 3, and the material distribution valve 4 are driven.

[0034] Specifically, taking a two-unit working face as an example, the following is the alternating operation process: Initial stage: Coal mining machine 2 first enters unit A to carry out coal cutting operations; at the same time, unit B is in the final stage of the hardening and curing of the filling body in the previous cycle.

[0035] Unit A Coal Mining Stage: After Unit A completes the predetermined cycle of coal mining, the coal mining machine 2 stops. The hydraulic supports of Unit A move forward to support the newly exposed roof and prepare for backfilling and isolation behind it.

[0036] Unit B filling and Unit A filling preparation: At this time, the coal mining machine 2 crosses the unit isolation device 5 and enters Unit B to begin coal mining operations in Unit B. Simultaneously, filling operations begin behind Unit A, injecting paste into the goaf through its independent filling pipeline.

[0037] Unit B Coal Mining and Unit A Curing Stage: During the coal mining operation in Unit B, the backfilling operation in Unit A has been completed, and its backfill body has entered the hardening and curing stage.

[0038] Alternating cycles: After unit B completes its scheduled coal mining task, coal mining machine 2 returns to unit A. At this time, the filling material in unit A has reached its initial setting strength and is ready for renewed coal mining. This process repeats, achieving a perfect superposition of the three processes—"coal mining - filling (filling preparation and filling operation) - curing"—on the timeline. Figure 3 As shown.

[0039] This application provides a backfilling coal mining system based on multi-unit alternating operation. By dividing a single longwall working face into multiple independently operable units in space and staggering the coal mining, backfilling, and maintenance processes of each unit in time, the coal mining and backfilling processes can be completely paralleled within the same working face, eliminating equipment waiting time and significantly improving the overall advancing speed and resource utilization of the working face.

[0040] In this embodiment, the control module 1 is further configured as follows: According to the work sequence report, the coal mining machine 2 is driven into the corresponding coal mining unit to carry out coal mining operations; the material distribution valve 4 of the corresponding coal mining unit is opened, and the filling pump 3 is started. When the coal mining unit is preparing for filling, the material distribution valve 4 of the corresponding coal mining unit is opened and the filling pump 3 is started, so that the filling material is transported through the transmission pipeline to the material distribution valve 4 and enters the filling area of ​​the corresponding coal mining unit.

[0041] In this embodiment, the control module 1 is further configured to: The flow rate of the filling material and the pressure value of the filling pump 3 are adjusted using the filling pump 3.

[0042] When the pressure value of the filling pump 3 exceeds a preset pressure threshold, the filling pump 3 is shut down and a warning message is sent to a designated device; the designated device is an electronic device capable of receiving electronic information. The warning message includes information such as the pressure value of the filling pump 3, to remind the operator to adjust the filling pump 3 immediately.

[0043] In this embodiment, the system further includes: Isolation device 5, the isolation device 5 being connected to the control module 1, the control module 1 being further configured to: During the filling preparation operation, the isolation device 5 is raised.

[0044] Specifically, the isolation device 5 includes: The track roadway isolation bracket 51 is used to prevent the filling material from seeping into the track roadway during the filling process.

[0045] The transport roadway isolation support 52 is used to prevent the filling material from overflowing from the filling area during the filling process.

[0046] The inter-filling unit isolation I-beam frame 53 is used to isolate each filling unit and prevent the filling material from flowing between adjacent filling units.

[0047] In this embodiment, the track roadway is the main passage for transport equipment (such as scraper conveyors and transfer machines) and personnel at the working face. The core function of the track roadway isolation support 51 is: To prevent leakage of filling materials: During filling operations, the track roadway isolation support 51 and the working face hydraulic support form a closed structure to prevent paste or cementing materials from seeping into the track roadway, thus avoiding blockage of transportation equipment or pollution of the roadway.

[0048] Ensuring safe equipment operation: Rigid supports maintain the stability of the roadway roof to prevent roadway deformation caused by lateral pressure from the backfill, ensuring continuous operation of transport equipment.

[0049] Personnel safety isolation: In conjunction with the centralized control system, the entrance to the roadway is automatically closed during filling to prevent personnel from accidentally entering the hazardous work area.

[0050] In this embodiment, the transport roadway is mainly used for coal transportation and material supply, and the transport roadway isolation support 52 focuses on: Dynamic sealing and pressure relief: When the coal mining machine is operating in the second coal mining unit, the isolation support 52 of the transport roadway needs to be dynamically adjusted in position as the working face advances. At the same time, it uses flexible sealing materials (such as rubber plates) to adapt to the roof cycle and apply pressure to prevent grout leakage.

[0051] Collaborative filling sequence: In conjunction with control module 1, when an adjacent coal mining unit enters the filling stage, the isolation support 52 of the transport roadway automatically rises and locks to ensure that the compaction of the filling body meets the standard.

[0052] Emergency protection function: If the filling material suddenly collapses, the isolation support 52 in the transport roadway can quickly form a temporary retaining wall, buying time for personnel evacuation and equipment repair.

[0053] In this embodiment, the inter-filling unit isolation I-beam frame 53 serves as the core isolation device for the alternating operation of multiple coal mining units. The inter-filling unit isolation I-beam frame 53 must meet the following requirements: Precise spatial separation: arranged vertically along the working face to ensure that the filling material does not flow into adjacent coal mining units.

[0054] Dual anti-overflow design: Metal mesh and flexible template are laid on the inner side of the I-beam frame 53 between filling units, and rigid baffles are set on the outer side to form a composite barrier of "flexibility and rigidity" to adapt to the flowability of different filling materials.

[0055] In this embodiment, the system further includes: Safety interlock unit 6, which is used to shut down the coal mining machine 2, the filling pump 3 and the material distribution valve 4.

[0056] Specifically, in the alternating operation of multiple coal mining units, each unit is divided into independent working spaces by temporary or permanent isolation devices (such as isolation supports or I-beam frames). Safety interlock unit 6 controls the raising or lowering or opening and closing of these isolation devices to ensure complete spatial isolation between the coal mining area and the backfilling area, preventing personnel or equipment from accidentally entering dangerous areas. When one unit is in coal mining operation, safety interlock unit 6 will lock the backfilling equipment (such as backfilling pump 3 and material distribution valve 4) of other coal mining units to prevent accidental injection of backfilling material into the coal mining area due to misoperation, and vice versa.

[0057] The safety interlock unit 6 can also track the position of the coal mining machine 2 in real time through sensors, determining its unit and operating status (such as coal cutting and frame movement). If the coal mining machine 2 moves across units, the safety interlock unit 6 will immediately trigger the adjustment of the relevant isolation device 5 to ensure the safety of the new operating area. The coal mining, backfilling, and curing status of each unit is fed back to the centralized control module 1 via the fieldbus. If the backfill material in a unit has not reached the initial setting strength, the safety interlock unit 6 will prohibit the coal mining machine 2 from entering that area to avoid the risk of roof collapse.

[0058] In the event of manual intervention or system failure, safety interlock unit 6 will enforce safety logic (such as emergency shutdown and automatic closure of isolation devices) to prevent accidents such as roof falls and slurry breaches caused by operational errors or equipment malfunctions. It works in conjunction with control module 1 to ensure that the work process conforms to the preset sequence. For example, after the coal mining machine 2 completes coal cutting, safety interlock unit 6 will first activate the hydraulic supports to protect the roof before allowing the filling operation to begin, avoiding prolonged roof exposure.

[0059] This application provides a backfilling coal mining system based on multi-unit alternating operation, which has the following beneficial effects: (1) Significantly improved efficiency: The coal mining, backfilling and maintenance processes are completely parallelized, eliminating ineffective waiting time. The overall speed of the working face can be increased by 20%-30%, and the annual production capacity is significantly increased.

[0060] (2) Maximize equipment utilization: High-value fully mechanized mining equipment can operate continuously without interruption, avoiding huge waste of production capacity and equipment idleness caused by waiting for the filling material to solidify.

[0061] (3) The system is highly adaptable: the number of units can be flexibly configured according to the length of the working face, the equipment capacity and the performance of the filling material, and can be expanded to three or more units to further optimize the operation sequence.

[0062] (4) High return on investment: Without increasing investment in large equipment, the production capacity can be greatly increased through process innovation, resulting in a very high input-output ratio.

[0063] (5) Safety production is guaranteed: the control system realizes effective isolation and interlocking of the work area, avoiding safety hazards caused by the cross-operation of coal mining and backfilling.

[0064] This application provides a backfilling coal mining system based on multi-unit alternating operation, which was verified through experiments at a backfilling working face. The working face has a dip length of 114m and is divided into three alternating operation units, each approximately 35m in length. According to the measured data, the coal mining machine 2 achieved continuous operation, and the average daily advance cycle of the working face was increased from the traditional two-day cycle to one-day cycle, resulting in a 50% increase in the overall advance speed. The quality of the backfill material was not affected, and the system operated safely and reliably.

[0065] A second aspect of this application provides a backfilling mining method based on multi-unit alternating operation, applied to a backfilling mining system based on multi-unit alternating operation as described in any of the above embodiments, comprising: The coal mining face is divided into several coal mining units along its length; the coal mining units are separated from each other to form independent coal mining space and filling space; each coal mining unit is equipped with an independent coal mining machine travel area, filling pipeline and material distribution valve, and the filling pump is connected to the filling pipeline; the material distribution valve is set at the filling port of the filling pipeline. A work sequence report is generated based on the coal mining time of the coal mining machine, the single filling operation time of the filling pump, and the time required for the filling material to reach its initial setting strength. The work sequence report is used to display the work status of each coal mining unit within each time period of the set work time. The work status includes: coal mining operation, filling preparation operation, filling operation, and curing operation. In the work sequence report, at least one coal mining unit is in the coal mining operation status within the set work time. According to the operation sequence report, the coal mining machine, filling pump and material distribution valve are driven.

[0066] It is worth noting that the effects of the above method embodiments can be found in the effects of the above system embodiments during operation, and will not be repeated here.

[0067] The above detailed embodiments further illustrate the purpose, technical solution, and beneficial effects of the embodiments of this application. It should be understood that the above are merely specific embodiments of the embodiments of this application and are not intended to limit the protection scope of the embodiments of this application. Any modifications, equivalent substitutions, improvements, etc., made on the basis of the technical solutions of the embodiments of this application should be included within the protection scope of the embodiments of this application.

Claims

1. A backfilling coal mining system based on multi-unit alternating operation, characterized in that, include: Control module (1), which is connected to coal mining machine (2), filling pump (3) and material distribution valve (4); The control module (1) is configured as follows: The coal mining face is divided into several coal mining units along its length; the coal mining units are separated from each other to form independent coal mining space and filling space; each coal mining unit is equipped with an independent coal mining machine (2) walking area, filling pipeline and material distribution valve (4), the filling pump (3) is connected to the filling pipeline; the material distribution valve (4) is set at the filling port of the filling pipeline; Based on the coal mining time of the coal mining machine (2), the single filling operation time of the filling pump (3), and the time required for the filling body to reach the initial setting strength, an operation sequence report is generated; the operation sequence report is used to display the operation status of each coal mining unit in each time period of the set working time. The operational states include: coal mining operations, backfilling preparation operations, backfilling operations, and maintenance operations; According to the operation sequence report, drive the coal mining machine (2), filling pump (3) and material distribution valve (4); When the control module (1) drives the coal mining machine (2) to perform the coal mining operation in the first coal mining unit, it simultaneously drives the filling pump (3) and the material distribution valve (4) to perform the filling operation in the second coal mining unit; when the coal mining machine (2) moves to the second coal mining unit to perform the coal mining operation, the filling body in the first coal mining unit enters the maintenance operation state, so that at least one of the coal mining units is in the coal mining operation state within the set working time.

2. The backfilling and mining system based on multi-unit alternating operation according to claim 1, characterized in that, The control module (1) is further configured as follows: Drive the coal mining machine (2) into the first coal mining unit to carry out coal mining operations. After the coal mining operations are completed, drive the coal mining machine (2) into the next coal mining unit to carry out coal mining operations until the last coal mining unit. After the coal mining machine (2) enters the last coal mining unit and completes the coal mining operation, the step of driving the coal mining machine (2) to enter the first coal mining unit to carry out the coal mining operation is executed again to determine the coal mining operation time of each coal mining unit. Based on the coal mining operation time, an operation sequence report is generated according to the backfilling preparation operation time, backfilling operation time, and curing operation time.

3. A backfilling and mining system based on multi-unit alternating operation according to claim 1, characterized in that, The control module (1) is further configured as follows: According to the operation sequence report, drive the coal mining machine (2) into the corresponding coal mining unit to carry out coal mining operations; drive the material distribution valve (4) of the corresponding coal mining unit to open, and start the filling pump (3).

4. A backfilling coal mining system based on multi-unit alternating operation according to claim 1, characterized in that, The control module (1) is also configured to: The flow rate of the filling material and the pressure value of the filling pump (3) are adjusted using the filling pump (3).

5. A backfilling coal mining system based on multi-unit alternating operation according to claim 1, characterized in that, The control module (1) is also configured to: When the pressure value of the filling pump (3) is greater than the preset pressure threshold, the filling pump (3) is turned off and a warning message is sent to the setting device; the setting device is an electronic device that can receive electronic information.

6. A backfilling coal mining system based on multi-unit alternating operation according to claim 1, characterized in that, The system also includes: Isolation device (5), the isolation device (5) being connected to the control module (1), the control module (1) being further configured to: During the filling preparation operation, the isolation device (5) is raised.

7. A backfilling coal mining system based on multi-unit alternating operation according to claim 6, characterized in that, The isolation device (5) includes: Track roadway isolation bracket (51), the track roadway isolation bracket (51) is used to prevent the filling material from seeping into the track roadway during the filling process; Transport roadway isolation support (52), the transport roadway isolation support (52) is used to prevent the filling material from overflowing from the filling area during the filling action; An I-beam frame (53) is provided between filling units to isolate each filling unit and prevent filling material from flowing between adjacent filling units.

8. A backfilling coal mining system based on multi-unit alternating operation according to claim 1, characterized in that, The system also includes: Safety interlock unit (6) is used to shut down the coal mining machine (2), the filling pump (3) and the material distribution valve (4).

9. A backfilling mining method based on multi-unit alternating operation, applied to a backfilling mining system based on multi-unit alternating operation as described in any one of claims 1 to 8, characterized in that, include: The coal mining face is divided into several coal mining units along its length; the coal mining units are separated from each other to form independent coal mining space and filling space; each coal mining unit is equipped with an independent coal mining machine travel area, filling pipeline and material distribution valve, and the filling pump is connected to the filling pipeline; the material distribution valve is set at the filling port of the filling pipeline. A work sequence report is generated based on the coal mining time of the coal mining machine, the single filling operation time of the filling pump, and the time required for the filling material to reach its initial setting strength. The work sequence report is used to display the operation status of each coal mining unit in each time period within the set working time. The operational states include: coal mining operations, backfilling preparation operations, backfilling operations, and maintenance operations; The operation sequence report states that at least one of the coal mining units is in the operation status of coal mining within the set working time. According to the operation sequence report, the coal mining machine, filling pump and material distribution valve are driven.

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