CN-122014248-A - Large-stage coal chute and coal conveying method for comprehensive mechanized mining face of vertical trough coal

CN122014248ACN 122014248 ACN122014248 ACN 122014248ACN-122014248-A

Abstract

The invention relates to the technical field of coal mine engineering, in particular to a large-stage coal chute and coal conveying method for a vertical trough coal comprehensive mechanized mining working face; the coal mining device comprises coal sliding holes, at least 2 coal sliding holes, a coal sliding pipe and an anti-blocking device, wherein the coal sliding holes are arranged in a coal layer of a vertical trough coal working surface, the coal sliding holes are arranged at least 2 straight-through coal layer mining horizontal lower boundaries along the inclined direction of the coal layer, the coal sliding pipes are arranged in the coal sliding holes, the anti-blocking device is arranged at the upper ports of the coal sliding holes, and the buffer device is arranged at the lower ports of the coal sliding holes. The invention uses large-stage coal chute to convey raw coal, replaces the traditional belt conveyor and the original self-sliding device, and solves the problem of conveying raw coal on the vertical trough coal depression mining working surface.

Inventors

CUI LIZHI
ZHANG JIYE
LIU YU
ZHAO MINGYANG
YANG WENMING
MA LIQIANG
WANG CHAOYANG
LIU QINGLI
AN YI

Assignees

天山实验室
陕西科索矿业有限公司
新疆工程学院
郑州煤矿机械集团有限责任公司
郑州郑煤设计工程有限公司

Dates

Publication Date: 20260512
Application Date: 20260215

Claims (10)

1. The large-stage coal chute of the comprehensive mechanized mining working face of the vertical trough coal is characterized by comprising coal chute holes which are arranged in a coal layer of the working face of the vertical trough coal, at least 2 coal chute holes which are communicated with the coal layer mining horizontal lower boundary are arranged along the inclined direction of the coal layer, a coal chute is arranged in the coal chute holes, an anti-blocking device is arranged at the upper port of the coal chute holes, and a buffer device is arranged at the lower port of the coal chute holes.
2. The large-stage coal chute of the comprehensive mechanized mining face of the vertical trough coal as claimed in claim 1, wherein the anti-blocking device comprises a feeding funnel and a grating, the feeding funnel is arranged at the upper port of the coal chute, the grating is arranged at the upper end of the feeding funnel, or/and the inner side of the upper part of the coal chute is respectively provided with a gas dust monitoring device and a carbon monoxide detector, or/and a conveying device and an iron removing device are arranged above the corresponding coal chute.
3. The large-stage coal chute of the comprehensive mechanized mining face of the vertical trough coal according to claim 2, wherein the feeding funnel is a double-layer funnel, a dust outlet communicated with the inner cavity is arranged on the outer side of the upper part of the feeding funnel, and a dust catcher is arranged at the dust outlet of the feeding funnel.
4. The large-stage coal chute of the comprehensive mechanized mining working face of the vertical trough coal according to claim 1,2 or 3, wherein the buffer device comprises an elbow, a split shovel, an elastic buffer and an energy dissipation plate, the elbow and the split shovel are sequentially arranged at the lower end of the coal chute from top to bottom, an included angle between the lower end of the elbow and a horizontal plane is 30-35 degrees, sieve holes are distributed at the bottom of the split shovel, and at least three guide ribs are axially arranged on the upper end face of the bottom of the split shovel.
5. The large-stage coal chute of the vertical trough coal comprehensive mechanized mining working face is characterized in that a coal bin is arranged below the coal chute, a cover plate is arranged at the top of the coal bin, a feed inlet is arranged at the left part of the cover plate, the lower end of a coal chute penetrates through the feed inlet and stretches into the coal bin, a steel beam is arranged at the bottom of the cover plate, the lower part of the coal chute is fixed on the steel beam, a joist is arranged at the upper part of the coal bin, a shunt shovel is arranged on the joist, two rows of elastic buffers are hung at the bottom end of the middle part of the cover plate along the left-right direction, the left-right adjacent elastic buffers are staggered, a left-low energy dissipation plate and a right-high energy dissipation plate are arranged on the inner wall of the right side of the coal bin, and the elastic buffers and the energy dissipation plate correspond to the discharge end of the shunt shovel.
6. The large-stage coal chute of the comprehensive mechanized mining face of the vertical trough coal, which is disclosed in claim 5, is characterized in that a gas dust monitoring device and a laser radar coal level detector are respectively arranged between the wall of the coal bin and the bent pipe, or/and at least two groups of air cannons are symmetrically arranged on the outer side of the lower part of the coal bin, air guns are arranged on the air cannons and are positioned in the coal bin, or/and a discharge hole is arranged at the bottom of the coal bin, and a coal feeder is arranged at the discharge hole of the coal bin.
7. The large-stage coal chute of the comprehensive mechanized mining face of the vertical trough coal as set forth in claim 1, 2 or 3, wherein the coal chute is made of wear-resistant steel materials, or/and the coal chute is composed of a plurality of sections of sleeves which are connected end to end and can be quickly disassembled and assembled, the length of each section of sleeve is matched with the coal mining height of one cycle of the coal mining machine, and 2 movable clamping rings are symmetrically arranged outside the end parts of each section of sleeve.
8. The large-stage coal chute of the comprehensive mechanized mining face of the vertical trough coal as claimed in claim 4, wherein the coal chute is made of wear-resistant steel materials, or/and the coal chute is composed of a plurality of sections of sleeves which are connected end to end and can be quickly disassembled and assembled, the length of each section of sleeve is matched with the coal mining height of one cycle of the coal mining machine, and 2 movable clamping rings are symmetrically arranged outside the end parts of each section of sleeve.
9. The large-stage coal chute of the vertical trough coal comprehensive mechanized mining working face according to claim 6 is characterized in that the coal chute is made of wear-resistant steel materials, or/and the coal chute is composed of a plurality of sections of sleeves which are connected end to end and can be quickly disassembled and assembled, the length of each section of sleeve is matched with the coal mining height of one cycle of a coal mining machine, and 2 movable clamping rings are symmetrically arranged on the outer sides of the end parts of each section of sleeve.
10. A method for large-stage chute coal conveying on a vertical chute coal comprehensive mechanized mining working face according to claim 7, 8 or 9, which is characterized by comprising the following steps: The method comprises the steps that in a coal seam of a vertical trough coal working face, at least 2 coal sliding holes which are directly communicated with the coal seam mining horizontal lower boundary are arranged along the coal seam inclination direction, coal sliding pipes are arranged in the coal sliding holes, the lower ends of two steel wire ropes respectively penetrate through movable clamping rings on each section of coal sliding pipe and are fixed on the lowest section of sleeve, the upper ends of the two steel wire ropes are respectively connected with two winches, and the lower ends of the coal sliding pipes penetrate through a feed inlet and extend into a coal bin; Secondly, cutting coal on a working surface by using a continuous miner, conveying raw coal to a coal sliding hole through a shuttle car for unloading, buffering the raw coal in the coal sliding hole when the raw coal reaches a lower bent pipe, shunting by a shunting shovel, enabling the powdered coal to directly fall into a coal bin through a sieve hole on the shunting shovel, enabling blocky coal to be scraped by the shunting shovel to collide with a buffer, then throwing the blocky coal to an energy dissipation plate, eliminating kinetic energy to fall into the coal bin through the energy dissipation plate, and enabling the raw coal in the coal bin to enter a transportation roadway through a coal feeder; Thirdly, after one recovery cycle is implemented, a section of sleeve pipe of the coal chute is taken out from the upper part; Fourth, repeating the second step and the third step until the coal conveying work of the stoping raw coal on the working face is completed.

Description

Large-stage coal chute and coal conveying method for comprehensive mechanized mining face of vertical trough coal Technical Field The invention relates to the technical field of coal mine engineering, in particular to a large-stage coal chute and coal conveying method for a vertical trough coal comprehensive mechanized mining working face. Background The coal chute is a drop shaft for vertically chute coal in mining. The coal at the upper part of the horizontal part is directly slipped to the lower part conveying system by utilizing the height difference of the coal chute, so that the conveying efficiency can be effectively improved. The well engineering and mining safety facility design clearly requires that the diameter of the coal chute needs to be combined with the capacity, and the coal chute needs to balance the transportation efficiency and safety, so that the technical feasibility and the economic rationality are reflected. The patent document with the publication number of CN120922515A discloses a coal chute with a multistage buffering function, which comprises a feed inlet and a communicating pipe arranged at the bottom end of the feed inlet, wherein the feed inlet is arranged to communicate the communicating pipe with a discharge port of a raw coal pulverizer so that crushed raw coal can enter an inner cavity of the communicating pipe, a dust removing buffer mechanism is used for removing dust in crushed raw coal, the dust removing buffer mechanism is arranged to buffer raw coal fragments discharged from the communicating pipe, dust and dust in raw coal can be absorbed and collected at the same time, dust and dust can be removed along with the accumulation of raw coal, and an anti-blocking mechanism is used for preventing raw coal from being blocked in the dust removing buffer mechanism and a packing box arranged on the outer surface of the anti-blocking mechanism so as to achieve the effect of multistage buffering of raw coal when the raw coal is transported. Patent document with publication number of CN222848246U discloses a coal chute fore shaft coal unloading device, which relates to the technical field of coal exploitation and mainly aims to simplify the structure of coal conveying equipment and reduce potential safety hazard. The main technical scheme is that the coal chute mouth locking and unloading device comprises an inclined guide pipe and a buffer mechanism, wherein the upper port of the inclined guide pipe is in butt joint with a coal chute, the buffer mechanism comprises a wind shielding part and a counterweight part, the upper end of the counterweight part is fixedly connected to the upper side edge of the lower port of the inclined guide pipe, and the wind shielding part is fixedly attached to the counterweight part and used for covering the lower port of the inclined guide pipe. The patent document with the bulletin number of CN215595647U discloses a self-closing coal chute device, which comprises a collecting hopper, wherein the outer side of the top end of the collecting hopper is provided with an ore layer collecting hopper, the bottom of the collecting hopper is fixedly connected with a coal chute, one side of the bottom end of the coal chute is provided with a self-sealing plate mechanism, the self-sealing plate mechanism comprises a plugging cover shell, the inside of one side of the plugging cover shell is provided with a shell groove, the inside of the shell groove is embedded with a self-sealing colloid, the bottom of the shell groove is provided with a shell bump fixedly connected with the plugging cover shell, the top end of one side of the self-sealing plate mechanism is provided with a connecting rod mechanism, the connecting rod mechanism comprises a first connecting rod, one side of the top of the first connecting rod is fixedly connected with a second connecting rod, one side of the connecting rod mechanism is provided with a counterweight mechanism, and after coal falling, the coal chute can be immediately plugged by using the self-sealing plate mechanism, and the self-closing coal chute device has the characteristics of abrasion resistance, long service cycle and easy maintenance. The prior art has the defects of limited height and application range, and the conventional coal chute has the height of 10m to 60m and the diameter of 2 to 4m. Mainly serving near horizontal or gently inclined multiple coal seams, which are disposed in the rock formations. The support mode is single, the anchor net is adopted for spray support or concrete casting, and the lower part can be assisted by a wear-resistant steel plate. However, in the coal seam of the coal mining chute, the chute with ultra high (100 m) is required to bear long-term coal flow impact, and the durability and the stability of the chute are required to be reevaluated. Aiming at the specificity of mining the opposite trough coal (such as large coal flow impact and difficult dust and gas control), a system solut