A fluidized return mining structure and method suitable for deep coal resources

Abstract

The present invention provides a fluidized return mining structure and method suitable for deep coal resources, the structure comprising: a mining area; an underground transfer station for fluidized resources located in the mining area; a vertical fluidized resource conveying pipeline extending from the underground transfer station for fluidized resources to the ground; a horizontal main tunnel located in the mining area and extending to the boundary of the mining area; a horizontal fluidized resource conveying pipeline located in the horizontal main tunnel and extending to the underground transfer station for fluidized resources; and a return mining route located in the mining area. The fluidized return mining structure in the present invention only needs to lay out one horizontal main tunnel and one underground transfer station for fluidized resources when mining deep coal resources, and does not need to build tunnels for coal lifting and transportation, thereby reducing the number of tunnels for power supply and equipment supply, and reducing the construction and maintenance costs of tunnels. Basically, no residual coal pillars will be left in the mining area, and the recovery rate is high.

Description

Technical Field

[0001] The invention relates to the technical field of mineral mining, and in particular to a fluidized return mining structure and method suitable for deep coal resources. Background Art

[0002] In order to overcome the problem of the extreme depth of traditional coal mining methods and solve the safety and environmental problems in the process of deep coal resource mining, a group of scholars have proposed a method of in-situ fluidized mining of deep coal resources. The so-called fluidized mining refers to the in-situ conversion of deep solid mineral resources into gaseous, liquid or gas-solid-liquid mixed fluidized resources, and the realization of unmanned intelligent mining, selection, charging, heat and electricity conversion in the mine. In order to realize this technical concept, these scholars proposed the use of shield-type fluidized mining equipment with integrated mining, selection, charging, gas and heat for fluidized mining of deep solid coal resources. Fluidized mining equipment is different from traditional coal mining machinery. It can directly complete a series of processes such as coal mining, washing, coal fluidization conversion and goaf filling in the coal mine.

[0003] However, in order to transport and lift coal, supply power, and supply equipment, traditional coal mining methods require the excavation of multiple shafts, a large number of tunnels, and underground transfer stations for fluidized resources. This mining method not only requires large tunnel excavation, high costs for shaft and tunnel construction and maintenance, but also leaves many coal pillars and has a low recovery rate. It is not suitable for fluidized mining of deep coal resources.

[0004] Therefore, the prior art still needs to be improved and enhanced. Summary of the invention

[0005] The technical problem to be solved by the present invention is that, in view of the above-mentioned defects of the prior art, a fluidized return mining structure and method suitable for deep coal resources is provided, aiming to solve the problems of traditional coal mining methods such as large tunnel excavation volume, high shaft and tunnel construction and maintenance costs, many coal pillars left, low recovery rate, and unsuitability for fluidized mining of deep coal resources.

[0006] The technical solution adopted by the present invention to solve the technical problem is as follows:

[0007] A fluidized return mining structure suitable for deep coal resources, wherein the structure includes: a mining area; an underground transfer station for fluid resources located in the mining area; a vertical fluid resource transportation pipeline extending from the underground transfer station for fluid resources to the ground; a horizontal main tunnel located in the mining area and extending to the boundary of the mining area; a horizontal fluid resource transportation pipeline located in the horizontal main tunnel and extending to the underground transfer station for fluid resources; and a return mining route located in the mining area.

[0008] The fluidized return mining structure suitable for deep coal resources, wherein the structure also includes: a central vertical shaft with the bottom of the shaft located in the center of the mining area.

[0009] The fluidized return mining structure suitable for deep coal resources, wherein the structure also includes: a central vertical shaft with the bottom of the shaft located in the center of the mining area.

[0010] The fluidized return mining structure suitable for deep coal resources, wherein the vertical conveying pipeline for the fluidized resources is located in the central shaft.

[0011] The fluidized return mining structure suitable for deep coal resources, wherein the fluidized resource underground transfer station is located within a preset range at the bottom of the central vertical shaft.

[0012] The fluidized return mining structure suitable for deep coal resources, wherein the return mining route includes: a first return mining route located at the boundary of the mining area; a second return mining route adjacent to the first return mining route; and a third return mining route adjacent to the second return mining route.

[0013] The fluidized return mining structure suitable for deep coal resources, wherein the horizontal main tunnel is vertical to the central vertical shaft in space.

[0014] A mining method of a fluidized return mining structure suitable for deep coal resources, comprising the steps of:

[0015] Develop underground transfer stations and horizontal tunnels for fluidized resources in the mining area through fluidized mining equipment;

[0016] A vertical fluid resource delivery pipeline is laid out in the direction from the fluid resource underground transfer station to the ground, and a horizontal fluid resource delivery pipeline is laid out in the horizontal lane and in the direction from the fluid resource underground transfer station to the ground;

[0017] The fluidized mining equipment is used to mine fluidized resources along a return mining route, and the fluidized resources are transported and lifted to the ground through the fluidized resource horizontal transportation pipeline, the fluidized resource underground transfer station, and the fluidized resource vertical transportation pipeline.

[0018] The fluidized return mining method suitable for deep coal resources, wherein the return mining route includes: a first return mining route located at the boundary of the mining area; a second return mining route adjacent to the first return mining route; and a third return mining route adjacent to the second return mining route.

[0019] The fluidized return mining method applicable to deep coal resources, wherein the steps of mining fluidized resources along the return mining route by the fluidized mining equipment, and transporting and lifting the fluidized resources to the ground through the fluidized resource horizontal transportation pipeline, the fluidized resource underground transfer station and the fluidized resource vertical transportation pipeline include:

[0020] Coal resources are mined along the first loop mining route, the second loop mining route and the third loop mining route in sequence through fluidized mining equipment, and the fluidized resources are transported to the fluidized resource underground transfer station at a position where they can be docked with the fluidized resource horizontal transportation pipeline, and then the fluidized resources are transported and lifted to the ground through the fluidized resource vertical transportation pipeline.

[0021] Beneficial effects of the present invention: The present invention arranges a vertical fluid resource delivery pipeline extending from the fluid resource underground transfer station to the ground in the mining area, and a horizontal fluid resource delivery pipeline located in a horizontal lane and extending to the fluid resource underground transfer station, and transports and lifts fluid resources through the vertical fluid resource delivery pipeline and the horizontal fluid resource delivery pipeline. Only one horizontal lane and one fluid resource underground transfer station need to be arranged, and there is no need to build shafts and lanes for coal lifting and transportation, which reduces the number of shafts and lanes used for power supply and equipment supply, and reduces the construction and maintenance costs of shafts and lanes. There is basically no residual coal pillar left in the mining area, and the recovery rate is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of a top view of a fluidized return mining structure suitable for deep coal resources provided by the present invention;

[0023] Figure 2 It is a flow chart of a preferred embodiment of the fluidized return mining method suitable for deep coal resources provided by the present invention. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the present invention clearer and more specific, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0025] In order to transport and lift coal, supply power, and supply equipment, traditional coal mining methods require the excavation of multiple shafts, a large number of tunnels, and underground transfer stations for fluidized resources. This mining method not only has a large amount of tunnel excavation, high costs for shaft and tunnel construction and maintenance, many coal pillars, and a low recovery rate, but is also not suitable for fluidized mining of deep coal resources. In order to solve the above problems, the present invention provides a fluidized return mining structure suitable for deep coal resources, such as Figure 1As shown, the fluidized return mining structure of the present invention includes: a mining area 1; an underground transfer station 2 for fluidized resources located in the mining area 1; a vertical fluidized resource conveying pipeline 4 extending from the underground transfer station 2 for fluidized resources to the ground; a horizontal tunnel 3 located in the mining area 1 and extending to the boundary of the mining area 1; a horizontal fluidized resource conveying pipeline 5 located in the horizontal tunnel 3 and extending to the underground transfer station 2 for fluidized resources; and a return mining route located in the mining area 1. During the fluidized mining process of deep coal resources, the fluidized mining equipment 10 mines fluidized resources along the return mining route, passes through the horizontal tunnel 3 and docks with the horizontal fluidized resource conveying pipeline 5 in the horizontal tunnel 3, and conveys the fluidized resources to the underground transfer station 2 for fluidized resources; then the fluidized resources are conveyed to the ground through the vertical fluidized resource conveying pipeline 4 extending to the underground transfer station 2 for fluidized resources. The fluidized return mining structure of the present invention only needs to lay out a horizontal large tunnel 3 and a fluidized resource underground transfer station 2 when mining deep coal resources, and does not need to build tunnels for coal lifting and transportation, which reduces the number of tunnels for power supply and equipment supply, and reduces the construction and maintenance costs of tunnels. In addition, there is basically no residual coal pillar left in the mining area 1, and the recovery rate is high.

[0026] In specific implementation, the mining area 1 of the present invention is obtained by dividing the well field. A well field can be used as a mining area 1, or it can be divided into multiple mining areas 1; the mining area 1 can be an irregular shape area or a regular shape area, and each mining area 1 has its corresponding mining area boundary. In a specific embodiment, if Figure 1 As shown, the mining area 1 is a regular quadrilateral area, and the mining area boundary is the four sides of the rectangle.

[0027] In a specific embodiment, the fluidized return mining structure further includes a central shaft 6; the bottom of the central shaft 6 is located in the center of the mining area 1, and the central shaft 6 is used to lift and lower equipment and lay transportation pipelines. In the specific mining process, the central shaft 6 can be developed by the fluidized mining equipment 10, or the fluidized mining equipment 10 can be lowered to the bottom of the central shaft 6 that has been developed, and the subsequent development of the fluidized resource underground transfer station 2 and the horizontal main tunnel 3 can be carried out.

[0028] In a specific embodiment, the fluid resource underground transfer station 2 is located within a preset range at the bottom of the central shaft 6 and is used for the transfer of fluid resources. In a specific mining process, after the fluidized mining equipment 10 enters the bottom of the central shaft 6 through the central shaft 6, the fluid resource underground transfer station 2 is developed within a preset range at the bottom of the central shaft 6, and the preset range can be set according to user needs.

[0029] In a specific embodiment, the fluid resource vertical conveying pipeline 4 is located in the central shaft 6, and the fluid resource vertical conveying pipeline 4 is arranged in the central shaft 6. The fluid resource vertical conveying pipeline 4 extends from the fluid resource underground transfer station 2 to the ground along the central shaft 6, and is used for lifting the fluid resource. In the specific mining process, when there is fluid resource in the fluid resource underground transfer station 2, the fluid resource can be lifted to the ground through the fluid resource vertical conveying pipeline 4 extending to the fluid resource underground transfer station 2, which is suitable for fluidized mining of deep coal resources.

[0030] During specific implementation, the horizontal main tunnel 3 is located in the coal seam at the bottom of the central shaft 6, and extends along the bottom of the central shaft 6 to the boundary of the mining area. The horizontal main tunnel 3 is used for transporting equipment and laying transportation pipelines. As mentioned in the above steps, the mining area 1 can be an irregular shape area or a regular shape area. Obviously, when the mining area 1 is a polygonal area, there are multiple mining area boundaries corresponding to the mining area 1. During the specific mining process, the fluidized mining equipment 10 is used to develop the horizontal main tunnel 3 in the coal seam at the bottom of the shaft. The horizontal main tunnel 3 extends along the bottom of the central shaft 6 to any mining area boundary of the mining area 1, and the horizontal main tunnel 3 and the central shaft 6 are vertical in space.

[0031] During specific implementation, the return mining route can be set to one or more. In a specific embodiment, the return mining route includes: a first return mining route 7 located at the boundary of the mining area 1; a second return mining route 8 adjacent to the first return mining route 7; and a third return mining route 9 adjacent to the second return mining route 8. In the specific mining process, the fluidized mining equipment 10 reaches the boundary of the mining area 1 after completing the development of the horizontal main tunnel 3. At this time, the fluidized mining equipment 10 turns left or right at a set angle, and performs fluidized mining of the outermost circle of coal close to the boundary of the mining area 1. After completing the fluidized resource mining of the first return mining route 7, it reaches the turning point, and the fluidized mining equipment 10 is docked with the fluidized resource horizontal conveying pipeline 5, and the fluidized resources stored in the fluidized mining equipment 10 are transported and lifted to the ground through the fluidized resource horizontal conveying pipeline 5, the fluidized resource underground transfer station 2, and the fluidized resource vertical conveying pipeline 4. Subsequently, the second return mining route 8 and the third return mining route 9 are fluidized for mining in the same manner, and the fluidized resources are transported and lifted to the surface in the same manner.

[0032] In addition, the present invention also provides a mining method of the fluidized return mining structure applicable to deep coal resources, such as Figure 2 As shown, it includes the following steps:

[0033] S100, develop underground transfer stations and horizontal tunnels for fluidized resources in the mining area through fluidized mining equipment;

[0034] S200, laying a vertical fluid resource delivery pipeline in a direction extending from the fluid resource underground transfer station to the ground, and laying a horizontal fluid resource delivery pipeline in the horizontal tunnel and in a direction extending to the fluid resource underground transfer station;

[0035] S300, exploiting fluidized resources along a return mining route through the fluidized mining equipment, and transporting and lifting the fluidized resources to the ground through the fluidized resource horizontal transportation pipeline, the fluidized resource underground transfer station and the fluidized resource vertical transportation pipeline.

[0036] In the specific implementation, in order to carry out fluidized mining of deep coal resources, in this embodiment, firstly, a fluidized resource underground transfer station for fluidized resource transfer and a horizontal tunnel for transportation equipment and transportation pipelines are developed in the mining area through fluidized mining equipment. Then, a fluidized resource vertical transportation pipeline for lifting fluidized resources is laid in the direction extending from the fluidized resource underground transfer station to the ground, and a fluidized resource horizontal transportation pipeline for underground transportation of fluidized resources is laid in the horizontal tunnel and in the direction extending to the fluidized resource underground transfer station. Finally, coal resources are mined along the return mining route by fluidized mining equipment, and the fluidized resources are transported to the fluidized resource underground transfer station at a position where they can be docked with the fluidized resource horizontal transportation pipeline, and then transported and lifted to the ground through the fluidized resource vertical transportation pipeline. The fluidized return mining method of the present invention only requires the layout of a horizontal large tunnel and a fluidized resource underground transfer station, and does not require the construction of tunnels for coal lifting and transportation, thereby reducing the number of tunnels for power supply and equipment supply, and reducing the construction and maintenance costs of tunnels. In addition, there is basically no residual coal pillar left in the mining area, and the recovery rate is high.

[0037] In a specific embodiment, before the step of developing the underground transfer station and horizontal tunnel of the fluidized resource in the mining area, it is also necessary to develop a central shaft in the mining area for lifting and lowering equipment and laying transportation pipelines through fluidized mining equipment. The bottom of the central shaft is located in the center of the mining area, and then the fluidized mining equipment is lowered to the bottom of the shaft through the central shaft to develop the underground transfer station and horizontal tunnel of the fluidized resource.

[0038] In a specific embodiment, the return mining route includes: a first return mining route located at the boundary of the mining area; a second return mining route adjacent to the first return mining route; and a third return mining route adjacent to the second return mining route. Step S300 specifically includes:

[0039] S310. Coal resources are mined along the first loop mining route, the second loop mining route and the third loop mining route in sequence through fluidized mining equipment, and the fluidized resources are transported to the fluidized resource underground transfer station at a position capable of docking with the fluidized resource horizontal transportation pipeline, and then the fluidized resources are transported and lifted to the ground through the fluidized resource vertical transportation pipeline.

[0040] In specific implementation, the return mining route can be set to one or more. In a specific embodiment, the return mining route includes: a first return mining route located at the boundary of the mining area; a second return mining route adjacent to the first return mining route; and a third return mining route adjacent to the second return mining route. In the specific mining process, after the fluidized mining equipment completes the development of the horizontal main roadway, it reaches the boundary of the mining area. At this time, the fluidized mining equipment turns left or right at a set angle, and performs fluidized mining of the outermost circle of coal close to the boundary of the mining area. After completing the fluidized resource mining of the first return mining route, it reaches the turning point, and the fluidized mining equipment is docked with the horizontal conveying pipeline of the fluidized resource, and the fluidized resources stored in the fluidized mining equipment are transported and lifted to the ground through the horizontal conveying pipeline of the fluidized resource, the underground transfer station of the fluidized resource, and the vertical conveying pipeline of the fluidized resource. Subsequently, the second return mining route and the third return mining route are fluidized in the same manner, and the fluidized resources are transported and lifted to the ground in the same manner.

[0041] In summary, the present invention provides a fluidized return mining structure and method suitable for deep coal resources, the structure comprising: a mining area; an underground transfer station for fluidized resources located in the mining area; a vertical fluidized resource conveying pipeline extending from the underground transfer station for fluidized resources to the ground; a horizontal main tunnel located in the mining area and extending to the boundary of the mining area; a horizontal fluidized resource conveying pipeline located in the horizontal main tunnel and extending to the underground transfer station for fluidized resources; and a return mining route located in the mining area. The fluidized return mining structure in the present invention only needs to lay out one horizontal main tunnel and one underground transfer station for fluidized resources when mining deep coal resources, and does not need to build shafts and tunnels for coal lifting and transportation, thereby reducing the number of shafts and tunnels used for power supply and equipment supply, and reducing the construction and maintenance costs of shafts and tunnels. In addition, there will be basically no residual coal pillars left in the mining area, and the recovery rate is relatively high.

[0042] It should be understood that the application of the present invention is not limited to the above examples. For ordinary technicians in this field, improvements or changes can be made based on the above description. All these improvements and changes should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A fluidized return mining structure suitable for deep coal resources, characterized in that: The structure includes: a mining area; an underground fluid resource transfer station located in the mining area; a vertical fluid resource delivery pipeline extending from the underground fluid resource transfer station to the ground; a horizontal main lane located in the mining area and extending to the boundary of the mining area; a horizontal fluid resource delivery pipeline located in the horizontal main lane and extending to the underground fluid resource transfer station; and a return mining route located in the mining area; The return mining route includes: a first return mining route located at the boundary of the mining area; a second return mining route adjacent to the first return mining route; and a third return mining route adjacent to the second return mining route; Develop underground transfer stations and horizontal tunnels for fluidized resources in the mining area through fluidized mining equipment; A vertical fluid resource delivery pipeline is laid out in the direction from the fluid resource underground transfer station to the ground, and a horizontal fluid resource delivery pipeline is laid out in the horizontal lane and in the direction from the fluid resource underground transfer station to the ground; During the specific mining process, after the fluidized mining equipment completes the development of the horizontal main tunnel, it reaches the boundary of the mining area. At this time, the fluidized mining equipment turns left or right at a set angle, and conducts fluidized mining of the outermost circle of coal close to the boundary of the mining area. After completing the fluidized resource mining of the first loop mining route, it reaches the turning point, and the fluidized mining equipment is connected to the horizontal fluidized resource transportation pipeline, and the fluidized resources stored in the fluidized mining equipment are transported and lifted to the ground through the horizontal fluidized resource transportation pipeline, the underground fluidized resource transfer station and the vertical fluidized resource transportation pipeline. Subsequently, the second loop mining route and the third loop mining route are fluidized for mining in the same manner, and the fluidized resources are transported and lifted to the ground in the same manner.

2. The fluidized return mining structure suitable for deep coal resources according to claim 1 is characterized in that: The structure also includes: a central vertical shaft with the bottom of the shaft located in the center of the mining area.

3. The fluidized return mining structure suitable for deep coal resources according to claim 2 is characterized in that: The horizontal main tunnel is located in the coal seam at the bottom of the central shaft and extends along the bottom of the central shaft to the boundary of the mining area.

4. The fluidized return mining structure suitable for deep coal resources according to claim 2 is characterized in that: The fluid resource vertical transportation pipeline is located in the central shaft.

5. The fluidized return mining structure suitable for deep coal resources according to claim 2 is characterized in that: The fluid resource underground transfer station is located within a preset range at the bottom of the central vertical shaft.

6. The fluidized return mining structure suitable for deep coal resources according to claim 3 is characterized in that: The horizontal main tunnel is vertical to the central shaft in space.

7. A mining method using the fluidized return mining structure suitable for deep coal resources according to claim 1, characterized in that: Includes steps: Develop underground transfer stations and horizontal tunnels for fluidized resources in the mining area through fluidized mining equipment; A vertical fluid resource delivery pipeline is laid out in the direction from the fluid resource underground transfer station to the ground, and a horizontal fluid resource delivery pipeline is laid out in the horizontal lane and in the direction from the fluid resource underground transfer station to the ground; The fluidized mining equipment is used to mine fluidized resources along a return mining route, and the fluidized resources are transported and lifted to the ground through the fluidized resource horizontal transportation pipeline, the fluidized resource underground transfer station, and the fluidized resource vertical transportation pipeline; The return mining route includes: a first return mining route located at the boundary of the mining area; a second return mining route adjacent to the first return mining route; and a third return mining route adjacent to the second return mining route; During the specific mining process, after the fluidized mining equipment completes the development of the horizontal main tunnel, it reaches the boundary of the mining area. At this time, the fluidized mining equipment turns left or right at a set angle, and performs fluidized mining of the outermost circle of coal close to the boundary of the mining area. After completing the fluidized resource mining of the first loop mining route, it reaches the turning point, and the fluidized mining equipment is connected to the horizontal fluidized resource transportation pipeline, and the fluidized resources stored in the fluidized mining equipment are transported and lifted to the ground through the horizontal fluidized resource transportation pipeline, the underground fluidized resource transfer station and the vertical fluidized resource transportation pipeline. Subsequently, the second loop mining route and the third loop mining route are fluidized for mining in the same manner, and the fluidized resources are transported and lifted to the ground in the same manner.

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