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Gob-side entry retaining method for putting top waste rock down to achieve roadway side packing

A technology of retaining entry and gangue entry, which is applied in the direction of filling, earthwork drilling, safety devices, etc., and can solve problems such as the stability of difficult surrounding rocks and cost a lot of money

Inactive Publication Date: 2015-03-25
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In response to such problems, domestic and foreign scientific research and engineering personnel have proposed many effective methods and technologies, but there are still some problems. In terms of roadside support, when retaining roadways along gobs in thin coal seams, due to the relative movement of overlying strata Gentle, with targeted support, the problem of roadway support can still be effectively solved, but when the top coal caving face and thick coal seam fully mechanized mining face are retained along the goaf, it will cost a lot of money to carry out roadside support, even so , it is also difficult to completely solve the stability problem of the surrounding rock of the roadway

Method used

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  • Gob-side entry retaining method for putting top waste rock down to achieve roadway side packing
  • Gob-side entry retaining method for putting top waste rock down to achieve roadway side packing
  • Gob-side entry retaining method for putting top waste rock down to achieve roadway side packing

Examples

Experimental program
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Effect test

Embodiment 1

[0020] refer to figure 1 , 2 , 3, 4, and 5 illustrate Embodiment 1 of the present invention. When caving coal mining, first set up a single hydraulic prop 14 and a baffle plate 15 at the side of the side of the gob in the goaf to prevent gangue from entering Keep the roadway. During the advancing process of the working face in the upper section, after the coal discharging process of the working face is completed, the coal discharging work will be completed, and then the top coal caving support 1 will be directly put down the gangue above the goaf, and the rear scraper will pass through. The conveyor 20 transports to the end of the working face, passes through the rear loader 12, the connecting conveyor 6, and the front loader 11, and transports it to the crusher 10. After simple crushing, the gangue is transferred to the side loader 8 and transferred to the conveyor 7 , and then reach the suspension scraper conveyor 5 suspended on the hydraulic support 2 of the working face a...

Embodiment 2

[0024] refer to figure 1 , 2 , 3, 4, and 5 illustrate Embodiment 2 of the present invention. For mines equipped with the conditions for installing coal and gangue separation devices, when mining top coal, first set up a single hydraulic pressure The pillars 14 and the baffles 15 prevent gangue from being strung into the roadway. During the advancement of the upper section of the working face, excessive coal discharge is adopted, passing through the rear scraper conveyor 20, the rear reloader 12, the connecting conveyor 6, The pre-loader 11 is transported to the coal and gangue separation device 21, and the separated coal is directly transported out of the rear shaft through the main transport belt conveyor 9, and the separated gangue is transported back to the goaf on the side of the roadway, so that after treatment The waste rock is piled up and filled in the goaf on the side of the roadway, forming a gangue wall to serve as roadside support. The gangue return and accumulat...

Embodiment 3

[0026] refer to figure 1 , 2 , 3, 4, and 5 illustrate the third embodiment of the present invention. When carrying out ordinary comprehensive mechanized mining, the hydraulic support of the working face is replaced with the top-coal caving support 1, and the hydraulic support of the working face at the filling position at the side of the roadway needs to be replaced. A hydraulic support 2 with a rear roof beam is formed, and then during the advancing process of the working face in the upper section, the gangue above the goaf is directly lowered by the caving support and transported to the end of the working face, after simple crushing, reloading and transportation To the goaf on the side of the roadway retention, the processed gangue is piled up and filled in the goaf on the side of the roadway retention, forming a gangue wall to serve as roadside support. The gangue transporting out, crushing, returning, and accumulation processes involved in the above are the same as those ...

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Abstract

The invention relates to a gob-side entry retaining method for putting top waste rock down to achieve roadway side packing. The method is mainly applied to the gob-side entry retaining technical field. In the advancing process of a working face, a top coal caving support is directly adopted to put waste rack above a goaf down, the waste rock is transported to the end of the working face and is simply crushed, transferred and transported back, the processed waste rock is stacked, the goaf on one side of a retained roadway is filled with the processed waste rock to form a waste rock wall serving as a roadway side support, and a rear top beam is arranged at the position, needing roadway side packing, of hydraulic supports of the working face, so that a waste rock back transportation device is conveniently installed and the waste rock is stacked to the enough height. Meanwhile, when the waste rock is stacked or after the waste rock is stacked, cemented filling materials are sprayed to the stacking position of the waste rock to achieve airtightness and reinforcement along the roadway side support of the gob-side entry retaining. The method is of great importance in ensuring gob-side entry retaining stability of the thick seam working face, especially the fully mechanized caving face, improving the resource recovery rate and simplifying the roadway side support process.

Description

technical field [0001] The invention belongs to the technical field of gob entry retention, and specifically relates to a gob entry retention method in which gangue above the goaf is directly put down, transported out, crushed, reloaded, and transported back so that the gangue is piled up and cemented to serve as roadside support method. Background technique [0002] The coal mining method of retaining goaf along the goaf is a major reform of the coal mining method. It has a significant effect on improving the resource recovery rate, reducing the gold digging rate of the roadway, and alleviating the tension in mining. Effective roadside support and the air leakage prevention of the side roadside have always been the difficulty and key of gob-side entry retention technology. In response to such problems, domestic and foreign scientific research and engineering personnel have proposed many effective methods and technologies, but there are still some problems. In terms of road...

Claims

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Application Information

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IPC IPC(8): E21F15/00
CPCE21F15/00
Inventor 王家臣马念杰赵志强贾后省杨宝贵杨胜利刘洪涛
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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