A working face staggered layout method, product and equipment for coal mining ground fissures

Abstract

The application discloses a working face staggered layout method, product and equipment for coal mining ground fissures, and belongs to the technical field of mine exploitation subsidence and ecological restoration. The method comprises the following steps: S1, determining the overall layout mode of the upper and lower coal seam working faces; S2, determining the core mining and excavation parameters of the working faces; S3, determining the outer staggered distance or the inner staggered distance through numerical simulation; S4, obtaining the ground subsidence data and verifying; S5, determining the mining sequence of the upper and lower coal seam working faces according to the layout mode, and designing a full-process production system to realize the landing of the production scheme. The application does not discard the coal pillar resources and increase the roadway excavation cost, and through the reasonable layout of the upper and lower coal seam working faces and the adjustment of the staggered distance of the upper and lower coal seam working faces, the development of the coal mining ground fissures can be weakened from the root, the development degree of the ground fissures can be weakened from the root, and the problems of the traditional method, such as many processes, long cycle, poor effect and the like, are solved.

Description

Technical Field

[0001] This invention belongs to the field of mining subsidence and ecological restoration technology, specifically relating to a staggered layout method, product and equipment for reducing the root cause of cracks in coal mining faces. Background Technology

[0002] Ground fissures in coal mining are a typical subsidence hazard that occurs on the surface during the mining of shallow coal seams. They are a concrete manifestation of the combined effects of underground and surface mining subsidence. In recent years, with the continuous increase in the intensity and scope of coal resource development, the scale of ground fissure development has also expanded. Especially in mountainous areas, coupled with rainfall infiltration and the development of fractured rock masses, landslides, debris flows, and rockfalls triggered by ground fissures seriously threaten people's lives and property, becoming a prominent problem urgently needing to be solved in the field of mining subsidence and ecological restoration.

[0003] Currently, the main methods for repairing and managing fissures in coal mining areas are passive and avoidance-based approaches. Passive methods involve classifying fissures into types such as tensile, step-type, and open-type based on on-site survey data after they have already developed. Depending on the developmental characteristics of each type, targeted measures such as grouting, topsoil backfilling, and land leveling are implemented, following a process of fissure filling-topsoil backfilling-land leveling-vegetation planting-ecological restoration. This process is illustrated by relevant patents (ZL201510799064.7, ZL201310249086.7, ZL201810802256.2, ZL202010392798.4, ZL201911303830). .0). When shallow coal seams are overlain by buildings, rivers, villages, protected natural resources, geological sites, or historical and cultural landscapes, the general approach is to leave wide protective coal pillars or simply abandon resource mining. The essence of avoidance-type remediation methods is to separate the protected target from areas with severe surface subsidence at a safe distance, thereby avoiding the impact of surface mining subsidence. For example, patent ZL202211253309.2 proposes a root-cause ground fissure mitigation method based on isolation walls. By setting up isolation walls, the ground fissures are altered... The direction of crack extension reduces differential settlement deformation caused by ground fissure activity, thereby achieving the goal of protecting the target. It is evident that current methods for repairing and managing ground fissures in coal mining are essentially remedial measures after the fissures have developed, and none can solve the problem at its root. In addition, experts have proposed proactive methods to reduce ground fissures. For example, patent ZL202110937672.5 proposes a coal pillar-interval staggered working face layout method to reduce the development of ground fissures at the source. In field implementation, the upper or lower coal seam working face is divided into two sections, with a coal pillar of a certain width left between the two sections, thereby reducing the development of ground fissures. However, this method, by leaving a coal pillar of a certain width underground, necessitates the abandonment of coal pillar resources, indirectly reducing the resource recovery rate. Dividing the working face into two sections requires the excavation of two additional roadways during working face recovery, increasing roadway excavation costs. Therefore, although this method proactively reduces ground fissure development, it comes at the cost of abandoning some coal resources and increasing roadway excavation costs.

[0004] Current methods for repairing and managing ground fissures in coal mining still require further improvement. Active repair methods for ground fissures need to be adjusted according to actual geological conditions to improve coal recovery rates and reduce production costs. The root cause of ground fissures in coal mining is surface subsidence, which in turn stems from the collapse and instability of overlying strata caused by the mining of shallow coal seams. Therefore, to fundamentally reduce the development of ground fissures, it is necessary to explore solutions related to the layout of underground working faces and mining process parameters. Clearly, there is an urgent need to propose a new method to fundamentally reduce the development of ground fissures in coal mining. Summary of the Invention

[0005] The present invention aims to at least partially solve one of the technical problems in the aforementioned related technologies.

[0006] Therefore, the purpose of this invention is to provide a method, product, and equipment for offset layout of working faces to reduce the root cause of ground fissures in coal mining. This method can reduce the degree of ground fissure development at its source, solving the problems of traditional methods such as multiple procedures, long cycles, and poor results. Furthermore, this method does not sacrifice coal pillar resources or increase roadway excavation costs. By rationally arranging the upper and lower coal seam working faces and adjusting the offset between them, it achieves the goal of reducing the development of ground fissures in coal mining at its source.

[0007] To solve the above-mentioned technical problems, the present invention is implemented as follows: This invention provides a method for staggered layout of working faces in coal mining with fissures, the method comprising: S1: Determine the overall layout of the upper and lower coal seam working faces; S2: Determine the core mining parameters of the working face; S3: Determine the external fault distance or internal fault distance through numerical simulation; S4: Obtain and verify surface subsidence data; S5: Determine the mining sequence of the upper and lower coal seam working faces based on the layout, and design a full-process production system to implement the production plan.

[0008] In addition, the staggered layout method for working faces in coal mining with fissures according to the present invention may also have the following additional technical features: In some of these implementations, step S1 includes determining the layout type based on coal seam occurrence, geological structure, hydrogeology, gas, coal dust, coal seam impact tendency, development method, mining sequence, tunneling technology, production system, and in conjunction with data including underground and surface comparison diagrams, mining engineering plan, and mine design specifications.

[0009] In some of these embodiments, the coal seam occurrence includes thickness, interlayer spacing, and roof and floor lithology; The geological structures include data on folds, faults, and joints.

[0010] In some of these implementations, the overall layout of the working surface in step S1 includes: In an outward-staggered layout, the upper and lower coal seam working faces have equal dip lengths but are spatially misaligned. The upper coal seam working face is offset from the lower coal seam working face by a certain distance; this offset distance is ≤ 1 / 2 of the working face dip length, ensuring a rational layout of the mining system; or... The inner staggered layout, the opposite of the outer staggered layout, has the upper coal seam working face staggered from the lower coal seam working face at a certain distance; the inner staggered distance is ≤ 1 / 2 of the working face dip length, to avoid conflicts in the mining system.

[0011] In some implementations, the mining parameters in step S2 include: Tunnel-related parameters: tunneling technology, tunnel layout, and support method; Coal mining related parameters: coal mining method, coal mining technology, goaf treatment method and mining height; Working face dimensions: dip length, direction length.

[0012] In some implementations, step S3 includes: Based on the geological conditions of coal and rock strata, including physical and mechanical parameters such as lithological strength and elastic modulus, a numerical calculation model is established to simulate the vertical displacement of the surface, the development scale and type of ground fissures under different displacements. By comprehensively comparing the degree of mining damage under different displacements, a reasonable value is selected as the internal displacement distance or external displacement distance.

[0013] In some implementations, step S4 includes: reconstructing a numerical model based on the determined layout, offset, and geological parameters to obtain surface subsidence data during the mining process; plotting surface subsidence curves to verify the mitigation effect of the layout scheme on subsidence and ensure that the technical objectives can be achieved.

[0014] In some implementations, the end-to-end production system designed in step S5 includes: Coal mining subsystem: Matching integrated mechanized mining, clarifying cutting depth and coal cutting methods; Raw coal transportation subsystem: The transportation sequence is working face → transportation roadway → transportation gate → transportation uphill → surface coal bunker; Auxiliary transportation subsystem: The workflow includes materials or equipment → track uphill → yard → track gate → return airway; Tunneling subsystem: Personnel or materials → Track uphill → Yard → Track gate → Tunneling face, tunneling raw coal flows into the main transportation system; Drainage subsystem: Working face or tunneling face → drainage pump → water tank → bottom water tank → surface sewage treatment plant.

[0015] This invention also provides a computer program product, including a computer program that, when executed by a processor, implements the steps of the staggered layout method for working faces in coal mining fissures as described in any of the preceding embodiments.

[0016] This invention also provides a computer device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the working face staggered layout method for coal mining fissures as described in any of the preceding embodiments.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects: In this embodiment of the invention, the provided method for staggered working face layout for coal mining fissures reduces the surface subsidence coefficient to 0.6 by rationally arranging the upper coal seam working face, the lower coal seam working face, and the external offset between the upper and lower coal seam working faces, significantly reducing the degree of surface subsidence. The staggered working face layout method significantly reduces the degree of surface subsidence, thereby reducing the development of ground fissures from the root cause. At the same time, the staggered working face layout method does not require the retention of coal pillars and additional tunneling roadways, achieving a "win-win" situation of increasing revenue and efficiency. The staggered layout method for working faces in coal mining with ground fissures provided in this embodiment of the invention is different from the traditional method for repairing and managing ground fissures. The staggered layout method is a root cause method that does not require additional manpower, resources, or materials, significantly reducing the cost of repairing and managing ground fissures. It has good prospects for promotion and application and is of great practical significance for the construction of green mines.

[0018] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description Figure 1 This is a schematic diagram of an externally staggered layout of the working surface disclosed in an embodiment of the present invention; Figure 2 This is a schematic diagram of a staggered layout within the working surface disclosed in an embodiment of the present invention; Figure 3 This is a UDEC numerical calculation model diagram of the staggered layout of the C5 and C7 coal seam working faces in a certain mine, as disclosed in an embodiment of the present invention. Figure 4 This is a diagram showing the vertical surface displacement curves after mining of the C5 and C7 coal seam working faces in a certain mine, as disclosed in an embodiment of the present invention. Figure 5 This is a surface horizontal displacement curve diagram after mining of the C5 and C7 coal seam working faces of a certain mine, as disclosed in an embodiment of the present invention.

[0019] Explanation of reference numerals in the attached figures: 1-Upper coal seam working face; 2-Lower coal seam working face; 3-Outer offset distance; 4-Inner offset distance. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings and specific examples and application scenarios.

[0022] In some embodiments of the present invention, a staggered layout method for reducing root-cause damage in coal mining faces is provided, comprising the following steps: Step 1: Based on the coal seam occurrence, geological structure, hydrogeology, gas, coal dust, coal seam impact tendency, as well as the development method, mining method, mining sequence, tunneling technology, and production system, and in conjunction with the underground and surface comparison diagram, mining engineering plan, mine preliminary design specification, and mine safety chapter, determine the overall layout of the upper and lower coal seam working faces in the area to be mined.

[0023] The characteristic of the staggered working face layout is that: the dip length of the upper coal seam working face is equal to the dip length of the lower coal seam working face; the upper coal seam working face is arranged in one segment; the lower coal seam working face is arranged in one segment; the two ends of the upper and lower coal seam working faces are not aligned spatially, and the upper coal seam working face is staggered from the lower coal seam working face by a certain distance (see [reference]). Figure 1 (As shown).

[0024] In some embodiments of the present invention, the external offset distance should not exceed half the dip length of the working face in order to facilitate the layout of the mining system.

[0025] In some embodiments of the present invention, the in-face staggered layout is characterized by being the opposite of the out-of-face staggered layout. The dip length of the upper coal seam working face is equal to the dip length of the lower coal seam working face, and the working face in the upper coal seam is arranged in one segment. The working face in the lower coal seam is also arranged in one segment. The two ends of the upper and lower coal seam working faces are not spatially aligned, and the upper coal seam working face is staggered from the lower coal seam working face by a certain distance (e.g., ...). Figure 2 (As shown).

[0026] In some embodiments of the present invention, the internal misalignment distance should not exceed half the dip length of the working face in order to facilitate the layout of the mining system.

[0027] Step 2: Based on the mine mining design specifications, determine the roadway excavation process, roadway layout, roadway support method, mining method, mining technology, goaf treatment method, mining height, working face strike length, and working face dip length for the upper and lower coal seam working faces.

[0028] Step 3: Determine the external displacement distance. Based on the working face layout, and using the geological conditions of the coal and rock strata and their physical and mechanical parameters as fundamental data, a numerical calculation model is established. Through numerical simulation calculations, the vertical surface displacement and the scale of ground fissure development at different external displacement distances are analyzed. Following the principles of resource conservation, safety and efficiency, and environmental protection, a reasonable value for the external displacement distance is determined through comprehensive comparison.

[0029] Step 4: Based on the layout of the upper and lower coal seam working faces and the external offset, combined with the production geological conditions, physical and mechanical parameters of the coal and rock strata, and comprehensive columnar section of the upper and lower coal seam working faces, establish a numerical calculation model, obtain surface subsidence data during the mining process, and draw surface subsidence curves.

[0030] Step 5: Based on the working face layout, determine the mining sequence of the upper and lower coal seam working faces, and design the coal mining system, tunneling system, transportation system, ventilation system, and drainage system.

[0031] Example 1: A certain mine is located in Liangcun Town, Xishui County, Guizhou Province, with a designed production capacity of 450,000 tons per year. The mining area covers 1.68 km². 2 The minefield extends 3.65 km in length and dips 0.46 km in width. All mineable coal seams within the area are C5, C7, C8, and C12, with average thicknesses of 1.9 m, 3.1 m, 2.02 m, and 1.3 m, respectively. Currently, the mine is mining the C5 and C7 coal seams, with an inter-seam spacing of 14.75–16.44 m. The roof and floor of the C5 coal seam are fine sandstone and claystone, respectively, as are those of the C7 coal seam.

[0032] A staggered layout method for reducing root-cause damage from coal mining fissures in working faces includes the following steps: Step 1): Determine the layout of the upper and lower coal seam working faces. The basic geological conditions for mine production are as follows: ① Coal seam occurrence: The exposed strata, from newest to oldest, include the Quaternary (Q), the Lower Triassic Yelang Formation (T). 1y ) and the Upper Permian Changxing Formation (P 3c ), Longtan Group (P 3l ), Central Bureau of Statistics Maokou Group P 2m Among them, T 1y P 3c P 3l Complete exposure, P 2mThe upper part is exposed, with scattered Quaternary formations. The Upper Permian Longtan Formation is the coal-bearing stratum in the area, with a pseudo-conformable contact between the bottom and the Maokou Formation limestone, and a conformable contact between the top and the Changxing Formation limestone. The coal-bearing strata are all continuously deposited. The C5, C7, C8, and C12 coal seams have relatively simple structures, and their thickness and stratigraphic position are relatively stable.

[0033] ② Geological Structure: Located on the northwest limb of the Sangmuchang anticline, it is a monoclinic structure. The rock strata generally trend northeast to southwest, dipping at 305–332° with an angle of 29–35°, averaging 30°. There are no faults or folds in the area, but joints are relatively well-developed in some local sections, indicating a simple structural type.

[0034] ③ Hydrogeology: The hydrogeological conditions are moderate. The main types of water hazards include surface water, roof fissure water, floor water, fault water, and old cave water.

[0035] ④ Ventilation and Gas: The absolute gas emission rate in the mine is 3.02 m³. 3 / min, absolute carbon dioxide emission is 0.64m³. 3 / min, relative gas emission rate 23.13 m³ / min 3 / t, relative carbon dioxide emission 4.16 m³ 3 / t, the assessment result is a high gas mine.

[0036] ⑤ Other: The coal dust in coal seams C5, C7, C8, and C12 poses no explosion hazard. The spontaneous combustion tendency of coal seams C5, C7, C8, and C12 is classified as Class III, meaning they are not prone to spontaneous combustion. According to the data provided in the reserve verification report, the mine is a normal geothermal mine within the designated mining elevation. Neither the reserve verification report nor the data provided by the mine operator mentions any information regarding rockbursts, and there are no historical records of rockbursts in this mining area.

[0037] Based on the mine's geological data, the mining sequence of the working face adopts a downward mining method, and the layout of the working face adopts an outward staggered method.

[0038] Step 2): Determine the mining parameters of the working face. ① Tunnel excavation technology: adopting a fully mechanized tunneling method ② Roadway Layout: The track incline, haulage incline, and return air incline are located in the floor rock of the C12 coal seam. The working face roadways are arranged along the strike of the C5 and C7 coal seams. The working face roadways adopt a single-roadway layout, using a roof-cutting and goaf-keeping method. A "Y"-shaped ventilation system is used, with two intake and one return ventilation system. The track incline is connected to the working face roadways via a track gate. The haulage incline is connected to the working face roadways via a haulage gate. The return air incline is connected to the working face roadways via a return air gate.

[0039] ③ Roadway support method: The working face roadway has a rectangular cross-section and adopts a combined support method of "anchor mesh + steel strip + reinforced ladder beam". The net cross-section of the transport roadway is 11.4 m. 2 The net cross-section of the return airway is 9.2 m. 2 .

[0040] ④ Mining method: The mining method for the C5 and C7 coal seam working faces is the strike longwall retreat type.

[0041] ⑤ Coal mining technology: Comprehensive mechanized mining, with mining heights of 2.0 m and 3.0 m for C5 and C7 coal seams, respectively.

[0042] ⑥ Method for treating goaf: complete collapse method.

[0043] ⑦ Working face dip length: Based on the mine's production geological conditions and referring to similar conditions at home and abroad, the working face dip length of C5 coal seam is determined to be 120 m, and the working face dip length of C7 coal seam is determined to be 120 m.

[0044] ⑧ Working face strike length: determined according to the occurrence conditions of C5 and C7 coal seams and the specific mining engineering system, and should not be less than 750 m.

[0045] Step 3): Determine the external offset distances of the C5 and C7 coal seam working faces. Based on the layout of the C5 and C7 coal seam working faces, and combined with the geological conditions of coal and rock formations and their physical and mechanical parameters, a UDEC numerical calculation model was established. Figure 3 The development scale of ground fissures with outward displacement distances of 10 m, 20 m, 30 m, 40 m, 50 m, and 60 m was analyzed, and the degree of mining damage at different outward displacement distances was compared and analyzed. By analyzing the development degree and number of ground fissures with outward displacement distances of 10 m, 20 m, 30 m, 40 m, 50 m, and 60 m, the outward displacement distance of 60 m was determined.

[0046] Table 1. Ground fissure development at different displacement distances in the staggered layout of the C5 and C7 coal seams.

[0047] Step 4): Predict the degree of surface subsidence after mining of the C5 and C7 coal seams. Based on the staggered layout of the C5 and C7 coal seam working faces, and combined with the production geological conditions, physical and mechanical parameters of the coal and rock strata, and comprehensive columnar section, a UDEC numerical calculation model was established to obtain surface subsidence data during the mining process and to plot surface subsidence curves. Figure 5 ).

[0048] Step 5): Develop a working face system design scheme. Based on the working face layout, the mining sequence for the C5 and C7 coal seam working faces is determined to be downward mining, with the mining sequence being C5 coal seam working face → C7 coal seam working face.

[0049] ① Coal mining system: The C5 and C7 coal seams are mined using fully mechanized mining, with the longwall retreat mining method. The coal mining machine drum has a cutting depth of 0.6 m and adopts a bidirectional cutting and one-cut-back-forward cutting method.

[0050] ② Raw coal transportation system: The raw coal mined from the C5 and C7 coal seam working faces is transported directly to the surface coal bunker via the working face transportation roadway, transportation gate, and transportation uphill.

[0051] ③ Auxiliary transportation system: The materials and equipment required for the C5 and C7 coal seam working faces are transported uphill by rail, into the yard and rail gate, and into the return airway of the working face.

[0052] ④ Tunneling System: Personnel, materials, and equipment required for tunneling are transported uphill via rail to the yard, and then through the yard and rail gate to the tunneling face. Raw coal generated during the tunneling of the C5 and C7 coal seam working faces is transported in the working face transport roadway and then fed into the raw coal transport system by belt conveyor.

[0053] ⑤ Ventilation System: The fresh air required for the C5 and C7 coal seam working faces enters the track incline and transport incline from the ground, passes through the yard and track gate, and enters the working face transport roadway and working face. Then the exhaust air is discharged to the ground through the return air roadway, return air gate, and return air incline.

[0054] ⑥ Drainage system: Drainage pumps are provided in the transport roadway, return airway and tunneling face of C5 and C7 coal seam working faces. Water and water inrush in the mining face and tunneling face can be pumped into the water sump through the drainage pump, then discharged to the bottom water sump through the pipeline, and finally discharged to the surface sewage treatment plant through the main drainage pump.

[0055] Any part of this invention not described in detail can be referred to in the prior art or in the art known to those skilled in the art. This embodiment does not limit such part and will not describe it in detail here.

[0056] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of the present invention.

Claims

1. A method for staggered layout of working faces in coal mining with fissures, characterized in that, The method includes: S1: Determine the overall layout of the upper and lower coal seam working faces; S2: Determine the core mining parameters of the working face; S3: Determine the external fault distance or internal fault distance through numerical simulation; S4: Obtain and verify surface subsidence data; S5: Determine the mining sequence of the upper and lower coal seam working faces based on the layout, and design a full-process production system to implement the production plan; The overall layout of the working surface in step S1 includes: In an outward-staggered layout, the upper and lower coal seam working faces have equal dip lengths but are spatially misaligned. The upper coal seam working face is offset from the lower coal seam working face by a certain distance; this offset distance is ≤ 1 / 2 of the working face dip length, ensuring a rational layout of the mining system; or... The inner staggered layout is the opposite of the outer staggered layout, in which the upper coal seam working face is staggered from the lower coal seam working face at a certain distance; the inner staggered distance is ≤ 1 / 2 of the dip length of the working face, to avoid conflicts in the mining system; Step S3 includes: Based on the geological conditions of coal and rock strata, including physical and mechanical parameters such as lithological strength and elastic modulus, a numerical calculation model is established to simulate the vertical displacement of the surface, the development scale and type of ground fissures under different displacements. By comprehensively comparing the degree of mining damage under different displacements, a reasonable value is selected as the internal displacement distance or external displacement distance.

2. The staggered layout method for working faces in coal mining with fissures according to claim 1, characterized in that, Step S1 includes determining the layout type based on coal seam occurrence, geological structure, hydrogeology, gas, coal dust, coal seam impact tendency, development method, mining sequence, tunneling technology, production system, and data including underground and surface comparison diagrams, mining engineering plan, and mine design specifications.

3. The staggered layout method for working faces in coal mining with fissures according to claim 2, characterized in that, The occurrence of the coal seam includes its thickness, interlayer spacing, and lithology of the roof and floor. The geological structures include data on folds, faults, and joints.

4. The staggered layout method for working faces in coal mining with fissures according to claim 1, characterized in that, The mining parameters in step S2 include: Tunnel-related parameters: tunneling technology, tunnel layout, and support method; Coal mining related parameters: coal mining method, coal mining technology, goaf treatment method and mining height; Working face dimensions: dip length, direction length.

5. The staggered layout method for working faces in coal mining with fissures according to claim 1, characterized in that, Step S4 includes: based on the determined layout, offset, and geological parameters, reconstructing the numerical model to obtain surface subsidence data during the mining process; plotting surface subsidence curves to verify the mitigation effect of the layout scheme on subsidence and ensure that the technical objectives can be achieved.

6. The staggered layout method for working faces in coal mining with fissures according to claim 1, characterized in that, The end-to-end production system designed in step S5 includes: Coal mining subsystem: Matching integrated mechanized mining, clarifying cutting depth and coal cutting methods; Raw coal transportation subsystem: The transportation sequence is working face → transportation roadway → transportation gate → transportation uphill → surface coal bunker; Auxiliary transportation subsystem: The workflow includes materials or equipment → track uphill → yard → track gate → return airway; Tunneling subsystem: Personnel or materials → Track uphill → Yard → Track gate → Tunneling face, tunneling raw coal flows into the main transportation system; Drainage subsystem: Working face or tunneling face → drainage pump → water tank → bottom water tank → surface sewage treatment plant.

7. A computer program product, comprising a computer program, characterized in that, When executed by a processor, the computer program implements the steps of the staggered layout method for working faces in coal mining fissures as described in any one of claims 1-6.

8. A computer device, comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that the processor executes the computer program to implement the steps of the staggered layout method for working faces of any one of claims 1-6.

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