Method for gob-side entry retaining of medium-thickness coal seam

A technology of thick coal seam and empty entry retaining, which is applied in earthwork drilling, filling, safety devices, etc., can solve problems such as high cost, achieve low cost, good supporting effect, and ensure the stability of surrounding rock.

Inactive Publication Date: 2016-09-28
HENAN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In response to such problems, domestic and foreign scientific research and engineering personnel have proposed many effective related technologies, such as gangue bagging and stacking, dense pillars, and cementing material filling, etc., which have realized the

Method used

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  • Method for gob-side entry retaining of medium-thickness coal seam
  • Method for gob-side entry retaining of medium-thickness coal seam
  • Method for gob-side entry retaining of medium-thickness coal seam

Examples

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Example Embodiment

[0019] refer to figure 1 , 2 , 3, 4, and 5 illustrate the present invention, a method for retaining roadway along the goaf in a medium-thick coal seam, utilizes the advantage of large space in the working face of a medium-thick coal seam, at first changes part of the support of the working face on the side of the roadway into the top-coal caving support 8 And the long tail beam support 6, and the scraper conveyor 2, the reloading crusher 7, the transfer belt conveyor 5, and the lifting conveyor 3 are arranged behind the working surface support. During the advancing process of the working face, the gangue 11 above the goaf 1 is lowered directly by the top-coal caving support 8, transported by the scraper conveyor 2, crushed by the reloading crusher 7, and transferred by the transfer belt conveyor 5 to the descending conveyor 3, The lowering conveyor 3 lifts the lowered gangue 11 to the goaf 1 on the side of the roadway to form the roadside support 4, and the whole process is c...

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Abstract

The invention relates to a method for gob-side entry retaining of a medium-thickness coal seam and belongs to the technical field of gob-side entry retaining. The method is characterized in that by taking the advantage of large space of a working face of the medium-thickness coal seam, part of a support of the working face on the gob-side entry retaining side is changed into a top coal caving support and a long tail beam support, and a scraper conveyor, a transfer crusher, a transfer belt conveyor and a downward-spreading conveyor are arranged behind the supports on the working face; and in the working face propelling process, the top coal caving support is directly adopted for conveying gangue above a gob downwards, the downwards-conveyed gangue is downwards spread to the gob area on the gob-side entry retaining side to form a beside-entry support after the procedures of conveying, crushing, transferring and downward spreading, and the whole process is carried out in the gob area. Meanwhile, before the gangue is stacked, flexible protecting plates with holes are adopted for separation in advance so as to adapt to roof settling and prevent the gangue from entering an entry, cementing material filling and reinforcing are carried out, and the flexible protecting plates with the holes can be recycled. The method has important significance to guarantee of the gob-side entry retaining stability, increase of the resource recovery rate and simplifying of a beside-entry support process.

Description

technical field [0001] The invention belongs to the technical field of gob-side entry retention, and in particular relates to a gob-side entry retention that directly carries out gangue lowering, transportation, transshipment, and lowering procedures in the goaf, and utilizes the lowered gangue to be piled up as roadside support. method. Background technique [0002] The gob-side entry coal mining method has significant effects on improving the resource recovery rate, reducing the roadway excavation rate, and alleviating the tension in mining. The difficulty is generally high, and the mine pressure is also more severe. The economical and effective roadside support has always been the difficulty and key of the gob-side entry retention technology in medium-thick coal seams. In response to such problems, domestic and foreign scientific research and engineering personnel have proposed many effective related technologies, such as gangue bagging and stacking, dense pillars, and c...

Claims

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Application Information

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IPC IPC(8): E21C41/18E21F13/06E21F15/00
CPCE21C41/18E21F13/06E21F15/005
Inventor 贾后省张梦婕冯志耀臧海智贾俊飞赵强
Owner HENAN POLYTECHNIC UNIV
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