Fully mechanized coal mining face installation construction method

Abstract

The present application relates to a kind of fully mechanized working face installation construction method, for realizing the safe and fast commissioning of coal mine comprehensive mechanization working face, reduce the brush extension after fully mechanized working face cut eye through, installation preparation period, improve the roof risk resistance of working face;Excavation engineering gives consideration to installation preparation, belt drift construction support assembly chamber during excavation, installation belt system, power supply liquid and extraction pipeline etc., avoid cross influence in later period, effectively reduce rework, improve auxiliary transport efficiency;Belt drift is not along empty excavation, roadway deformation is small, adopt belt drift transport support, reduce the roadway repair engineering quantity, improve the safety factor of transport support.Single rail crane networked transport system is established, reduce the winch transfer link in operation, greatly reduce the number of auxiliary transport, improve the efficiency of auxiliary transport system;Before cut eye brush extension, advance installation temporary support support, first support then extend, first extend then install or extend while install, guarantee the safety of roof, improve construction efficiency.

Description

Technical Field

[0001] This invention relates to a coal mine fully mechanized mining construction method, specifically, to a fully mechanized mining face installation and construction method. Background Technology

[0002] After the longwall mining face is completed and put into operation, the installation process of the longwall mining equipment is generally as follows: the two roadways and the cut through the working face are connected → the cut is opened and expanded → the working face equipment is installed, the belt conveyor system of the conveyor roadway and the power supply, hydraulic supply and extraction pipeline are installed → commissioning and production. During the cut opening expansion, the original 1m belt conveyor equipment used for tunneling of the conveyor roadway must be retained. It can only be removed in a concentrated manner after the cutting face is ready to install hydraulic supports, and then the high-strength belt conveyor system is installed again.

[0003] The main problems and security risks of existing technologies are:

[0004] 1. The dismantling of the 1m belt conveyor in the conveyor roadway, the installation of the high-power belt conveyor and power supply, hydraulic supply and extraction pipelines in the working face are concentrated in a relatively short period. The transportation volume of accessories for the 1m belt conveyor in the 1500m tunnel alone is 120 mine (forklift) cars, and the transportation volume of accessories for the 1500m high-power belt conveyor is 270 mine (forklift) cars. This occupies a large amount of transportation equipment and personnel, which poses a huge challenge to the auxiliary transportation capacity of the mining area, and thus restricts the transportation and installation efficiency of the hydraulic support in the working face.

[0005] 2. The spacing between coal pillars between working faces in the mining area is generally 7 to 10 meters. The track roadway of the second working face is generally a goaf-advancing roadway. According to Article 153 of the "Coal Mine Safety Regulations," "When adjacent coal mining faces in the same coal seam, wing, or mining area are being mined along the goaf, simultaneous operation of the mining and tunneling faces is strictly prohibited." Article 49 of the "Anhui Province Coal Mine Gas Comprehensive Management and Utilization Measures" states, "Goaf excavation or roadway delivery should be subject to an assessment of the surrounding rock stability and cementation status. Construction can only proceed after the overlying rock has stabilized. If the surrounding rock stability and cementation status assessment has not been conducted, the goaf excavation should be delayed by at least four months. Goaf roadway delivery can only proceed three months after the coal mining face has been closed following mining." Due to the impact of the adjacent first longwall face's mining activity, the second longwall face's track roadway can only be excavated after the first longwall face has completed mining and met the compaction requirements. This results in a tight schedule for track roadway excavation and a large amount of maintenance work. Using goaf-excavated track roadways to transport fully mechanized mining equipment severely restricts the commissioning period of the working face.

[0006] 3. To meet the needs of auxiliary transportation and installation of three types of equipment in the fully mechanized mining face, the cross-section of the cut-in face needs to be widened from 4-6m during tunneling to 8-10.9m. Conventional widening support methods use anchored mesh cables (suspended beams) in conjunction with individual (point pillar) and timber stack support. One timber stack is constructed every 20m on the widened side, and one individual (point pillar) is constructed at a 1-2m interval between every two timber stacks. The timber stacks and individual (point pillars) are gradually removed as the support system is installed. Widening the cut-in face generally uses a tunneling machine. Due to limitations in the length of the tunneling machine and the spacing of the timber stacks, the maximum suspended area during widening reaches length × width = 10.9m × 45m = 490m². 2 The amount of support required and the safety risks to the roof are both significant. Summary of the Invention

[0007] To address the shortcomings of the existing technology, this invention provides a method for the installation and construction of a fully mechanized mining face that reduces the time required for brushing, widening, and installation preparation after the cut-through of the longwall face, improves the risk resistance of the roof of the mining face, reduces rework, and improves the efficiency of auxiliary transportation.

[0008] The technical solution adopted in this invention is:

[0009] A method for installation and construction in a fully mechanized mining face includes the following steps:

[0010] Step 1: Set up a conversion yard in the lower part of the mining area as the network starting point for the conversion between ground rail transport and monorail transport in the main roadway. Select one of the two roadways of the fully mechanized mining face as the transport channel for large equipment.

[0011] Step 2: The conveyor belt roadway excavation and delivery uses a high-strength conveyor belt frame instead of the 1m conveyor belt frame used for tunneling; this saves on the later dismantling of the small conveyor belt and installation of the large conveyor belt frame, as well as the amount of auxiliary installation, dismantling, and transportation work.

[0012] During the tunneling process, based on the geological profile and support assembly requirements, the coal seam slope was pre-drilled to determine the location of the support assembly chamber. The tunneling machine was used for step-by-step pre-construction, which avoided manual climbing and roof lifting operations in the later stage, avoided rework, saved labor and material costs, improved mechanization efficiency and safety, and saved nearly 20 days of construction time.

[0013] During tunneling, the gas extraction pipe and high-pressure pipeline are connected along the route; this avoids interference with the transportation and installation of fully mechanized mining equipment during the installation preparation period, thereby improving installation efficiency.

[0014] Step 3: After the incision is completed, an integrated expansion and installation process is adopted, either by supporting first and then expanding, expanding first and then installing, or expanding and installing simultaneously.

[0015] Before the face is enlarged, a temporary support frame is first installed, and the roof is reinforced in sections. The installation spacing is adjusted according to the condition of the roof. Then the working face is enlarged, and finally the mining support is installed.

[0016] The cut-in eye was adjusted from a conventional 8-9m wide after widening to the original 6m, and the widened eye is now 10.9m. Two monorail crane lines were set up. During the cut-in eye excavation, one monorail crane line was set up at a distance of 1.9m from the coal face side to transport materials during the cut-in eye excavation, as well as to drive temporary support frames from bottom to top before widening.

[0017] After the temporary support frame is transported to the installation position, it is moved to the installation position by individual support frames towards the non-coal wall side. The spacing between the supports is adjusted according to the roof condition (generally 8-15m), and they are continuously and evenly arranged along the mountain to ensure the safety of the roof of the large-span roadway after the widening and sizing.

[0018] After the cut and widening, a single-railway hoisting line is arranged 3.5m away from the non-coal wall side. In conjunction with the first single-railway hoisting line, the hydraulic supports are first driven from bottom to top through the cut to the section of the track roadway, and then driven from top to bottom to the installation position via the single-railway hoisting line, ensuring that the supports are installed sequentially from bottom to top.

[0019] When the hydraulic support is installed at the position of the temporary support, the temporary support is directly adjusted to be used as an in-plane support.

[0020] By optimizing the cutting section, support transportation, and installation procedures, and ensuring that the support installation process is similar to conventional methods, the safe and efficient installation of fully mechanized mining equipment is achieved, saving nearly 40 days of construction time. This method is also applicable to the segmented enlargement and simultaneous enlargement and installation process.

[0021] The large equipment transport channel is selected in a non-alleyway or a roadway with relatively low pressure, and the monorail line, transfer yard, support assembly chamber, roadway layout, and roadway cross-sectional dimensions are designed. The cross-sectional dimensions of the other roadway only need to meet the requirements of conventional transportation and ventilation.

[0022] During the excavation of the two roadways, the monorails and the mining area rails form a monorail network. The two roadways of the working face are equipped with small-power monorails (usually equipped with four-wheel drive or six-wheel drive). During the installation of the three machines in the cutting eye, the roadway monorails used for transporting heavy equipment are adjusted to high-power monorail locomotives (usually equipped with ten-wheel drive).

[0023] Using a track roadway as a transport channel for large equipment, and a self-moving conveyor belt roadway for the tail section and crusher; the traditional local roadway transport is changed to transport and install via a track roadway through the cut-out; the excavation height of the conveyor belt transport roadway can be reduced.

[0024] The track roadway is a goaf-side roadway, while the transport channel for large equipment is selected in the belt conveyor roadway. This reduces the amount of excavation, support, and maintenance work required for the goaf-side roadway.

[0025] The advantages of this invention over the prior art are:

[0026] This invention relates to a fully mechanized mining face installation and construction method, which enables safe and rapid commissioning of fully mechanized coal mine faces, reduces the construction period for brushing and expansion and installation preparation after the cutting hole of the fully mechanized mining face is completed, and improves the risk resistance of the working face roof.

[0027] This invention relates to a fully mechanized mining face installation and construction method that integrates tunneling with installation preparation. During the conveyor belt roadway excavation, the construction support is assembled in the chamber, the conveyor belt system is installed, and power, fluid supply and extraction pipelines are installed, avoiding subsequent cross-influence, effectively reducing rework and improving auxiliary transportation efficiency.

[0028] The present invention relates to a fully mechanized mining face installation and construction method. The conveyor belt roadway is not excavated along the goaf, resulting in less roadway deformation. The use of conveyor belt roadway transport supports reduces the amount of roadway maintenance work and improves the safety factor of the transport supports.

[0029] The present invention relates to an installation and construction method for fully mechanized mining faces, which establishes a networked monorail transport system, reduces the intermediate links of winch transportation, greatly reduces the number of auxiliary transport personnel, and improves the efficiency of the auxiliary transport system.

[0030] The present invention relates to a fully mechanized mining face installation method that involves installing temporary support brackets in advance before the cutting and widening of the face, either by supporting before widening or by widening before installation or by widening and installation simultaneously, thereby ensuring the safety of the roof and saving the amount of construction work on timber stacks and individual (point pillars). Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the layout of the mining face in the fully mechanized mining face installation and construction method of the present invention;

[0032] Figure 2 This is a schematic diagram of the cut-eye support bracket arrangement and haulage route for the fully mechanized mining face installation and construction method of the present invention;

[0033] Figure 3 This is a schematic diagram of the installation and transportation route of the support after the cutting eye is expanded in the fully mechanized mining face installation and construction method of the present invention;

[0034] Figure 4 This is a schematic diagram of the installation of the eye support (orientation of the support support) in the fully mechanized mining face installation and construction method of the present invention;

[0035] Figure 5 This is a schematic diagram of the cross-sectional position of the cut-eye support bracket and monorail crane line in the fully mechanized mining face installation and construction method of the present invention;

[0036] Figure 6 This is a schematic diagram of the cross-section of the pre-drilling support of the longwall mining face installation method of the present invention.

[0037] Explanation of symbols for key components in the attached diagram:

[0038] In the picture:

[0039] 1. Centralized uphill mining area

[0040] 2. Longwall face 1

[0041] 3. Longwall face 2

[0042] 4. Longwall face 3

[0043] 5. Belt conveyor roadway of the longwall mining face

[0044] 6. First cutting eye of the longwall face

[0045] 7. Track roadway 2 of the longwall face

[0046] 8. Winch Chamber

[0047] 9. Coal wall

[0048] 10. Second cutting edge of the longwall face

[0049] 11. Area to be expanded

[0050] 12. Temporary support frame

[0051] 13. Monorail line

[0052] 14. Belt conveyor roadway 2 of the longwall face

[0053] 15. Support assembly chamber

[0054] 16. Single-rail suspension anchor bolt

[0055] 17. Lifting beam

[0056] 18. Hydraulic support

[0057] 19. Bracket outline

[0058] 20. Outline of the support beam after it is raised Detailed Implementation

[0059] The present invention will now be described in detail with reference to the accompanying drawings and embodiments:

[0060] Appendix Figure 1 The mining area adopts a single-wing strike longwall layout, with three coal mining faces arranged in a concentrated uphill section through a group of mining areas, and the coal pillar between the working faces is 10m.

[0061] Appendix Figure 2During the cutting-eye excavation, a single-railway overhead line is arranged 1.9m away from the coal face side to transport materials during the cutting-eye excavation, as well as to transport temporary support supports from bottom to top before widening. After the temporary support supports are transported to the installation position, they are moved to the installation position by individual supports towards the goaf side. The spacing between supports is adjusted according to the roof condition (generally 8-15m), and they are continuously and evenly arranged along the mountain to ensure the safety of the roof of the large-span roadway after widening.

[0062] Appendix Figure 3 After the cut and widening, a single-railway hoisting line is arranged 3.5m away from the non-coal wall side. In conjunction with the first single-railway hoisting line, the hydraulic supports are first driven from bottom to top through the cut to the section of the track roadway, and then driven from top to bottom to the installation position through the single-railway hoisting line, ensuring that the supports are installed sequentially from bottom to top.

[0063] Appendix Figure 4 When the support frame is installed to the position of the temporary support frame, the temporary support frame is directly adjusted to be used as an in-plane support frame.

[0064] Appendix Figure 5 After the cut and expansion, the total width is 10.9m. The upper transport monorail is located on the coal face side, 1.9m away from the side wall, and the lower transport monorail is located on the non-coal face side, 3.5m away from the side wall. The support frame is located between the two monorail lines.

[0065] Appendix Figure 6 After the hydraulic support is installed, the top beam is raised to support the roof plate. The distance between the front edge of the top beam and the coal wall is 2.5m, which does not affect the transport support of the monorail crane line.

[0066] Appendix Figure 1-6 It can be seen that a method for installing and constructing a fully mechanized mining face includes the following steps:

[0067] Step 1: Set up a conversion yard in the lower part of the mining area as the network starting point for the conversion between ground rail transport and monorail transport in the main roadway. Select one of the two roadways of the fully mechanized mining face as the transport channel for large equipment.

[0068] Step 2: The conveyor belt roadway excavation and delivery uses a high-strength conveyor belt frame instead of the 1m conveyor belt frame used for tunneling; this saves on the later dismantling of the small conveyor belt and installation of the large conveyor belt frame, as well as the amount of auxiliary installation, dismantling, and transportation work.

[0069] During the tunneling process, based on the geological profile and support assembly requirements, the coal seam slope was pre-drilled to determine the location of the support assembly chamber. The tunneling machine was used for step-by-step pre-construction, which avoided manual climbing and roof lifting operations in the later stage, avoided rework, saved labor and material costs, improved mechanization efficiency and safety, and saved nearly 20 days of construction time.

[0070] During tunneling, the gas extraction pipe and high-pressure pipeline are connected along the route; this avoids interference with the transportation and installation of fully mechanized mining equipment during the installation preparation period, thereby improving installation efficiency.

[0071] Step 3: After the incision is completed, an integrated expansion and installation process is adopted, either by supporting first and then expanding, expanding first and then installing, or expanding and installing simultaneously.

[0072] Before the face is enlarged, a temporary support frame is first installed, and the roof is reinforced in sections. The installation spacing is adjusted according to the condition of the roof. Then the working face is enlarged, and finally the mining support is installed.

[0073] The cut-in eye was adjusted from a conventional 8-9m wide after widening to the original 6m, and the widened eye is now 10.9m. Two monorail crane lines were set up. During the cut-in eye excavation, one monorail crane line was set up at a distance of 1.9m from the coal face side to transport materials during the cut-in eye excavation, as well as to drive temporary support frames from bottom to top before widening.

[0074] After the temporary support frame is transported to the installation position, it is moved to the installation position by individual support frames towards the non-coal wall side. The spacing between the supports is adjusted according to the roof condition (generally 8-15m), and they are continuously and evenly arranged along the mountain to ensure the safety of the roof of the large-span roadway after the widening and sizing.

[0075] After the cut and widening, a single-railway hoisting line is arranged 3.5m away from the non-coal wall side. In conjunction with the first single-railway hoisting line, the hydraulic supports are first driven from bottom to top through the cut to the section of the track roadway, and then driven from top to bottom to the installation position via the single-railway hoisting line, ensuring that the supports are installed sequentially from bottom to top.

[0076] When the hydraulic support is installed at the position of the temporary support, the temporary support is directly adjusted to be used as an in-plane support.

[0077] By optimizing the cutting section, support transportation, and installation procedures, and ensuring that the support installation process is similar to conventional methods, the safe and efficient installation of fully mechanized mining equipment is achieved, saving nearly 40 days of construction time. This method is also applicable to the segmented enlargement and simultaneous enlargement and installation process.

[0078] The large equipment transport channel is selected in a non-alleyway or a roadway with relatively low pressure, and the monorail line, transfer yard, support assembly chamber, roadway layout, and roadway cross-sectional dimensions are designed. The cross-sectional dimensions of the other roadway only need to meet the requirements of conventional transportation and ventilation.

[0079] During the excavation of the two roadways, the monorails and the mining area rails form a monorail network. The two roadways of the working face are equipped with small-power monorails (usually equipped with four-wheel drive or six-wheel drive). During the installation of the three machines in the cutting eye, the roadway monorails used for transporting heavy equipment are adjusted to high-power monorail locomotives (usually equipped with ten-wheel drive).

[0080] Using a track roadway as a transport channel for large equipment, and a self-moving conveyor belt roadway for the tail section and crusher; the traditional local roadway transport is changed to transport and install via a track roadway through the cut-out; the excavation height of the conveyor belt transport roadway can be reduced.

[0081] The track roadway is a goaf-side roadway, while the transport channel for large equipment is selected in the belt conveyor roadway. This reduces the amount of excavation, support, and maintenance work required for the goaf-side roadway.

[0082] This invention relates to a fully mechanized mining face installation and construction method, which enables safe and rapid commissioning of fully mechanized coal mine faces, reduces the construction period for brushing and expansion and installation preparation after the cutting hole of the fully mechanized mining face is completed, and improves the risk resistance of the working face roof.

[0083] This invention relates to a fully mechanized mining face installation and construction method that integrates tunneling with installation preparation. During the conveyor belt roadway excavation, the construction support is assembled in the chamber, the conveyor belt system is installed, and power, fluid supply and extraction pipelines are installed, avoiding subsequent cross-influence, effectively reducing rework and improving auxiliary transportation efficiency.

[0084] The present invention relates to a fully mechanized mining face installation and construction method. The conveyor belt roadway is not excavated along the goaf, resulting in less roadway deformation. The use of conveyor belt roadway transport supports reduces the amount of roadway maintenance work and improves the safety factor of the transport supports.

[0085] The present invention relates to an installation and construction method for fully mechanized mining faces, which establishes a networked monorail transport system, reduces the intermediate links of winch transportation, greatly reduces the number of auxiliary transport personnel, and improves the efficiency of the auxiliary transport system.

[0086] The present invention relates to a fully mechanized mining face installation method that involves installing temporary support brackets in advance before the cutting and widening of the face, either by supporting before widening or by widening before installation or by widening and installation simultaneously, thereby ensuring the safety of the roof and saving the amount of construction work on timber stacks and individual (point pillars).

[0087] This invention relates to a fully mechanized mining face installation and construction method. The installation of the fully mechanized mining face is planned in a coordinated manner from the tunneling stage, and the installation and mining ancillary works required during tunneling, production preparation, and mining are scientifically allocated. All works are integrated into a unified whole, the auxiliary transportation network system is optimized, cross-construction conflicts are avoided, and the opening, expansion, and installation are promoted in an integrated manner, shortening the overall project period and achieving the goal of safe and rapid commissioning of the fully mechanized mining face.

[0088] The present invention relates to a fully mechanized mining face installation and construction method, which specifies that one of the roadways in the working face is used as an auxiliary transportation channel for large equipment, and establishes a monorail networked auxiliary transportation system in both roadways during the excavation process to improve the efficiency of auxiliary transportation.

[0089] The present invention relates to an installation and construction method for fully mechanized mining faces, which utilizes the tunneling machine during the tunneling process to complete the installation of the required chambers, power supply, fluid supply, and extraction pipelines, making full use of working hours and reducing secondary engineering.

[0090] The present invention relates to a fully mechanized mining face installation and construction method that integrates opening, widening, and installation, with support provided before widening and installation carried out simultaneously.

[0091] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the structure of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention shall fall within the scope of the technical solution of the present invention.

Claims

1. A method for installation and construction in a fully mechanized mining face, characterized in that, Includes the following steps: Step 1: Set up a conversion yard in the lower part of the mining area as the network starting point for the conversion between ground rail transport and monorail transport in the main roadway. Select one of the two roadways of the fully mechanized mining face as the transport channel for large equipment. Step 2: The conveyor belt roadway excavation and delivery uses a high-strength conveyor belt frame for mining instead of the 1m conveyor belt frame for tunneling; During the tunneling process, based on the geological profile and support assembly requirements, the coal seam slope was pre-drilled to determine the location of the support assembly chamber, and the tunneling machine was used for step-by-step pre-construction; during the tunneling process, gas drainage pipes and high-pressure pipelines were connected along the route; Step 3: After the incision is completed, an integrated expansion and installation process is adopted, either by supporting first and then expanding, expanding first and then installing, or expanding and installing simultaneously. Before the working face is expanded, a temporary support frame is first installed, and the roof is reinforced in sections. The installation spacing is adjusted according to the condition of the roof. Then the working face is expanded, and finally the mining support is installed. The cut-in eye was adjusted from a conventional 8-9m wide after widening to the original 6m, and the widened eye is now 10.9m. Two monorail crane lines were set up. During the cut-in eye excavation, one monorail crane line was set up at a distance of 1.9m from the coal face side to transport materials during the cut-in eye excavation, as well as to drive temporary support frames from bottom to top before widening. After the temporary support frame is transported to the installation position, the single-unit support frame is moved to the installation position on the non-coal wall side. The spacing of the support frame is adjusted according to the roof condition and is continuously and evenly arranged along the mountain. After the cut eye is enlarged, a single-railway hoisting line is arranged 3.5m away from the non-coal wall side. In conjunction with the single-railway hoisting line, the hydraulic supports are first driven from bottom to top through the cut eye to the section of the track roadway, and then driven from top to bottom to the installation position via the single-railway hoisting line. The supports are then installed sequentially from bottom to top. When the hydraulic support is installed at the position of the temporary support, the temporary support is directly adjusted to be used as an in-plane support.

2. The installation and construction method for a fully mechanized mining face according to claim 1, characterized in that: The large equipment transportation channel is selected in a non-alleyway or a tunnel with relatively low pressure, and the monorail line, transfer yard, support assembly chamber, tunnel layout and tunnel cross-sectional dimensions are designed.

3. The installation and construction method for a fully mechanized mining face according to claim 1, characterized in that: During the excavation of the two roadways, the monorails and the mining area rails form a monorail network. Small-power monorails are equipped in the two roadways of the working face. During the installation of the three machines in the cutting eye, the roadway monorails used for transporting heavy equipment are adjusted to high-power monorail locomotives.

4. The installation and construction method for a fully mechanized mining face according to claim 1, characterized in that: Rail-mounted roadways are used as transport channels for large equipment, while conveyor belt roadways allow for self-moving tail sections and crushers; rail-mounted roadways are used for transporting and installing equipment via cut-outs. The track roadway is a goaf-side roadway, while the transport channel for large equipment is selected in the belt conveyor roadway.

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