Self-slip coal seam steel wire rope traction mining machine without scraper coal mining method

Abstract

The present application relates to the technical field of coal mining, and particularly discloses a self-sliding coal seam steel wire rope traction excavating and mining machine without scraper coal mining method, which comprises the following steps: S1, roadway arrangement, excavating an upper roadway and a lower roadway in a coal seam; the upper roadway is used for returning air and is provided with a self-propelled lifting equipment vehicle group, and the lower roadway is used for air intake and coal transportation; a region between the upper roadway and the lower roadway is a working face; S2, coal cutting operation, the self-propelled lifting equipment vehicle group drives a steel wire rope traction excavating and mining machine to cut coal along the working face; and S3, supporting the working face after coal mining according to the thickness of the excavated and mined coal seam and the broken degree of the coal seam roof. The present application solves the defects of the existing self-sliding coal seam various coal mining methods in application and effect, such as low yield and work efficiency, high excavation rate and pitwood consumption, high labor intensity, low recovery rate, and many unsafe factors, and improves the competitiveness of the mine with self-sliding coal seam in the current market economy.

Description

Technical Field

[0001] This invention relates to the field of coal mining technology, and in particular to a scraperless coal mining method using a self-sliding coal seam wire rope traction tunneling machine. Background Technology

[0002] In the mining of self-slipping coal seams (dipping angle ≥ 40°), traditional mining methods face the following technical bottlenecks:

[0003] 1. Scraper conveyors have poor adaptability:

[0004] Traditional mechanized and fully mechanized mining relies on scraper conveyors to transport coal. However, when the dip angle is greater than 25°, the scraper chain is prone to breakage and energy consumption increases dramatically, resulting in the working face cost accounting for as much as 30% to 40%. In extremely thin coal seams (thickness < 0.8m), it is difficult to install scraper conveyors due to space constraints, so blasting mining is forced to be used, which is inefficient and the recovery rate is less than 60%.

[0005] 2. Stability defects of the coal mining machine:

[0006] Traditional coal mining machines have their drums arranged axially perpendicular to the coal face. During the wire rope traction process, the drums are prone to "drifting" away from the coal face due to the reaction force, requiring frequent machine stops for adjustment and reducing cutting efficiency by more than 40%.

[0007] 3. High management costs for top and bottom slabs:

[0008] Existing technologies mostly use hydraulic supports for the roof of thin coal seams, but the supports are heavy, slow to move, and cost per ton of coal.

[0009] Therefore, there is an urgent need to provide a scraperless coal mining method using a wire rope traction tunneling machine in a self-slipping coal seam. By integrating the wire rope traction tunneling machine with a scraperless self-slipping transport system, unmanned and low-cost mechanized mining in steeply inclined coal seams can be achieved, thereby solving the problems existing in the above-mentioned technologies. Summary of the Invention

[0010] The purpose of this invention is to provide a scraperless coal mining method using a self-sliding coal seam wire rope traction tunneling machine to solve the problems existing in the prior art.

[0011] To achieve the above objectives, the present invention provides a scraperless coal mining method using a self-sliding coal seam wire rope traction tunneling machine, comprising the following steps:

[0012] S1. Roadway layout: an upper roadway and a lower roadway are excavated in the coal seam; the upper roadway is used for return air and is equipped with a self-propelled hoisting equipment group, and the lower roadway is used for air intake and coal transportation; the area between the upper roadway and the lower roadway is the working face;

[0013] S2. Coal cutting operation: The self-propelled hoisting equipment unit pulls the tunneling machine up the working face to cut coal by means of a steel wire rope;

[0014] S3. Support the working face after mining according to the thickness of the coal seam and the degree of fracture of the coal seam roof.

[0015] Preferably, the length of the working face is 40 meters to 200 meters.

[0016] Preferably, the working surface is arranged in a positive or negative inclination.

[0017] Preferably, the tunneling machine adopts a double coaxial drum, the axial direction of the two coaxial drums of the tunneling machine is parallel to the coal face of the working face, and the rocker arm of the tunneling machine is set between the two coaxial drums.

[0018] Preferably, the angle between the rocker arm and the working surface is 45°.

[0019] Preferably, the swing amplitude of the rocker arm of the tunneling machine is 5° to 15°.

[0020] Preferably, the self-propelled lifting equipment unit is equipped with a pulley system, and the steel wire rope, cable and water pipe connecting the self-propelled lifting equipment unit and the tunneling machine are all wound around the pulley system.

[0021] Preferably, when the coal seam thickness is less than 1.3 meters and the coal seam roof is not broken, the working face after mining is not supported; when the coal seam thickness is less than 1.3 meters but the coal seam roof is broken and cannot be naturally bent and closed after mining, or when the coal seam thickness is not less than 1.3 meters, the working face after mining is supported.

[0022] Preferably, the support method adopts at least one of the following: hydraulic support, single hydraulic prop, inclined segmented dense prop, and adjustable flexible shield support.

[0023] Preferably, this coal mining method is suitable for self-lubricating coal seams with a dip angle of 40° to 90°.

[0024] Compared with the prior art, the present invention has the following advantages and technical effects:

[0025] The self-sliding coal seam wire rope traction tunneling and mining machine provided by this invention transforms ordinary mechanized mining and fully mechanized mining faces into scraper-free, low-cost mining faces, saving on working face costs and enabling unmanned operation during coal cutting; it transforms steeply inclined blasting mining faces into mechanized mining faces, achieving mechanized coal mining; for thin and extremely thin coal seams with support, when the coal seam roof is not broken, the support and scraper conveyor can be eliminated, the working face is unmanned, and the roof and floor are not broken, bent, or closed, saving costs.

[0026] This invention targets coal seams with self-slipping properties, and enables unmanned, low-cost mechanized mining of steeply inclined coal seams by using a wire rope-driven tunneling machine. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 A schematic diagram illustrating the use of this invention for coal mining operations when the roadway does not require support;

[0029] Figure 2 A schematic diagram illustrating the use of this invention for coal mining operations when roadways require support;

[0030] Figure 3 A schematic diagram illustrating the use of this invention for coal mining operations when the working face is arranged at an inclined angle;

[0031] In the picture: 1. Self-propelled lifting equipment unit; 2. Tunneling machine; 3. Pulley block; 4. Wire rope; 5. Cable; 6. Water pipe; 7. Rocker arm; 8. Drum; 9. Scraper conveyor. Detailed Implementation

[0032] It should be noted that, unless otherwise specified, the embodiments and features described in this invention can be combined with each other. The described embodiments are merely some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this invention. The invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0033] like Figures 1 to 3 As shown, this invention provides a scraperless coal mining method using a wire rope traction tunneling machine for self-slipping coal seams, applicable to self-slipping coal seams with a dip angle of 40° to 90°, comprising the following steps:

[0034] S1. Roadway layout: an upper roadway and a lower roadway are excavated in the coal seam; the upper roadway is used for return air and is equipped with a self-propelled hoisting equipment unit 1, while the lower roadway is used for air intake and coal transportation; the area between the upper and lower roadways is the working face, which is 40 to 200 meters long and is arranged in a positive or negative inclination.

[0035] S2. Coal cutting operation: The self-propelled hoisting equipment unit 1 pulls the tunneling machine 2 up the working face to cut coal by means of steel wire rope 4. The self-propelled hoisting equipment unit 1 is equipped with pulley block 3. The steel wire rope 4, cable 5 and water pipe 6 connecting the self-propelled hoisting equipment unit 1 and the tunneling machine 2 are all wound on the pulley block 3 to avoid breakage due to excessive bending.

[0036] The tunneling machine 2 employs two coaxial drums 8. The axial direction of the two coaxial drums 8 is parallel to the coal face, which is significantly different from the traditional arrangement of drums 8 perpendicular to the coal face in coal mining machines. The main movement direction of the cutting teeth of the two coaxial drums 8 in contact with the coal body is from the inside of the coal face to the outside, ensuring that the drums 8 tightly grip the coal body and preventing the tunneling machine 2 from drifting away from the coal face under traction. The rocker arm 7 of the tunneling machine 2 is located between the two coaxial drums 8, and the angle between the rocker arm 7 and the working face is [missing information]. 45°, to avoid the rocker arm 7 obstructing the upward cutting of coal by the tunneling machine 2; the overall coal cutting operation is advanced along the coal seam direction or pseudo-inclination direction; during the continuous upward pulling process, the two coaxial drums 8 continuously swing slightly along the axial direction, the swing amplitude of the rocker arm 7 of the tunneling machine 2 is 5° to 15°, the swing frequency is matched with the traction speed, to ensure coal cutting efficiency and uniform coal block size, thereby gradually removing the residual coal pieces between the drums 8 and realizing continuous cutting; the mined coal blocks slide along the coal seam to the lower roadway and are transported away by the scraper conveyor 9.

[0037] S3. Depending on the thickness of the coal seam and the degree of fracture of the roof and floor, the working face after mining may or may not be supported. When the coal seam thickness is less than 1.3 meters and the roof is not fractured, the working face after mining is not supported, no one works in the mining face, the roof achieves non-fractured bending and subsidence through natural closure, and the floor achieves non-fractured bending and floor heave through natural closure. When the coal seam thickness is less than 1.3 meters but the roof is fractured, or when the coal seam thickness is not less than 1.3 meters, the working face after mining is supported. The support method shall be at least one of the following: hydraulic support, single hydraulic prop, downward pseudo-inclined segmented dense prop, and adjustable flexible shield support.

[0038] The self-sliding coal seam wire rope traction tunneling and mining machine provided by this invention transforms ordinary mechanized mining and fully mechanized mining faces into scraper-free, low-cost mining faces, saving on working face costs and enabling unmanned operation during coal cutting; it transforms steeply inclined blasting mining faces into mechanized mining faces, achieving mechanized coal mining; for thin and extremely thin coal seams with support, when the coal seam roof is not broken, the support and scraper conveyor can be eliminated, the working face is unmanned, and the roof and floor are not broken, bent, or closed, saving costs.

[0039] This invention solves the problems of low output and efficiency, high tunneling rate and pit prop consumption, high labor intensity, low recovery rate and many unsafe factors in the application and effect of various existing coal mining methods for self-slipping coal seams, and improves the competitiveness of mines with self-slipping coal seams in the current market economy.

[0040] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A self-sliding coal seam steel wire rope traction mining machine without a scraper coal mining method, characterized in that, The method comprises the following steps: S1, roadway arrangement, excavating an upper roadway and a lower roadway in a coal seam; the upper roadway is used for returning air and is provided with a self-propelled lifting equipment vehicle group, the lower roadway is used for incoming air and coal transportation; a region between the upper roadway and the lower roadway is a working face; S2, coal cutting operation, the self-propelled lifting equipment vehicle group pulls a mining machine along the working face upward through a steel wire rope to cut coal; S3, supporting the working face after coal mining according to the thickness of the coal seam and the broken degree of the coal seam roof; The working face is arranged in a positive inclination or a pseudo-inclination; The mining machine adopts double coaxial drums, the axial directions of the two coaxial drums of the mining machine are parallel to the coal wall of the working face, and a rocker arm of the mining machine is arranged between the two coaxial drums; The main movement direction of the cutting teeth of the two coaxial drums in contact with the coal body is from the coal wall inward to the coal wall outward, so that the drum tightly bites the coal body, and the mining machine is prevented from floating away from the coal wall under the action of traction force; the rocker arm of the mining machine is arranged between the two coaxial drums, and the included angle between the rocker arm and the working face is 45°, so as to avoid that the rocker arm hinders the mining machine from ascending to cut coal; the coal cutting operation is pushed forward along the strike or pseudo-inclination direction of the coal seam as a whole; The swing amplitude of the rocker arm of the mining machine is 5°-15°, the swing frequency is matched with the traction speed, the coal cutting efficiency and the uniformity of the coal particle size are ensured, so that the residual coal pieces between the drums are gradually cut off, and continuous cutting is realized; the fallen coal pieces slide along the coal seam to the lower roadway and are transported away by a scraper conveyor; The self-propelled lifting equipment vehicle group is provided with a pulley block, and the steel wire rope, the cable and the water pipe connected between the self-propelled lifting equipment vehicle group and the mining machine are wound on the pulley block.

2. The self-sliding coal seam steel wire rope traction mining machine without scraper blade coal mining method according to claim 1, characterized in that, The length of the working face is 40-200 m.

3. The self-sliding coal seam steel wire rope traction mining machine without scraper blade coal mining method according to claim 1, characterized in that, When the thickness of the coal seam is less than 1.3 m and the coal seam roof is not broken, the working face after coal mining is not supported; when the thickness of the coal seam is less than 1.3 m but the coal seam roof is broken and the working face after coal mining cannot be naturally curved and closed, and the thickness of the coal seam is not less than 1.3 m, the working face after coal mining is supported.

4. The self-sliding coal seam steel wire rope traction mining machine without scraper blade coal mining method according to claim 3, characterized in that, The supporting mode adopts at least one of a hydraulic support, a single hydraulic prop, a pseudo-inclined sectional dense prop and an adjustable flexible shield support.

5. The self-sliding coal seam steel wire rope pulling mining machine without scraper blade coal mining method according to claim 1, characterized in that, The coal mining method is suitable for self-sliding coal seams with an inclination angle of 40°-90°.

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