Gangue spacing filling coal mining method

A technology of filling coal mining and gangue, which is applied in the direction of filling materials, mining equipment, earth cube drilling and mining, etc. It can solve the problems of high auxiliary transportation pressure in mines, impossibility of application in thick coal seams, and large filling workload, so as to reduce auxiliary transportation pressure, Effect of controlling surface subsidence and reducing cost per ton of coal

Inactive Publication Date: 2018-06-26
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a gangue filling method at intervals, which solves the problems of the existing complete gangue filling method, such as large filling workload, high mine auxiliary transportation pressure, affecting coal mining operations, and inability to apply gangue filling coal mining method when mining thick coal seams.

Method used

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  • Gangue spacing filling coal mining method
  • Gangue spacing filling coal mining method

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Embodiment Construction

[0012] The implementation of the present invention will be further described below in conjunction with the accompanying drawings:

[0013] Step 1: According to the material composition and lithology of the overlying rock layer 1 and the roof 2, the caving length of the roof 2 is deduced.

[0014] Step 2: Starting from the opening of the cutting hole, the filling and mining hydraulic support 6 supports the roof 2, the coal cutter 11 cuts the coal body 7, and the cut coal is transported out of the coal mining face by the coal scraper conveyor 10, which is not carried out at this stage Filling work to form the goaf 3 .

[0015] Step 3: As the coal mining work proceeds, the filling mining hydraulic support 6 is constantly moved forward. Or when mining coal seam is thicker, described distance gets big value. When the gangue amount that coal mine produces is less or when mining coal seam is thinner, described distance gets small value), open the leakage material of bottom unloading...

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Abstract

The invention discloses a gangue spacing filling coal mining method, and relates to the technical field of coal mining methods. According to an existing gangue filling coal mining method, gangue needsto be utilized to completely fill a goaf, the mine auxiliary transportation cost is increased, coal mining work is greatly affected, the labor amount of filling workers is large, the gangue generatedduring mining of a thick coal seam is insufficient to completely fill the goaf, and the existing gangue filling coal mining method cannot be applied. According to the technical scheme, the gangue spacing filling coal mining method comprises the steps that the caving step pitch of roof strata is calculated according to the roof conditions of each coal mine, and precise filling is conducted on theposition where a roof is likely to caving by utilizing an ordinary gangue filling method, so that the to-be-caved roof strata is supported; as for precise filling, only the position where a roof is likely to caving is filled with a filling gangue belt which is parallel to a coal mining working face, so that the to-be-caved roof strata is supported; and as for the gangue belt, the bottom width is 10m-20 m.

Description

technical field [0001] The invention relates to a coal mining method, in particular to a gangue interval filling coal mining method. Background technique [0002] With the massive exploitation of coal resources, the problem of coal pressing under buildings, railways, and water bodies has become more and more prominent, seriously affecting the country's energy demand and the normal production of mining enterprises. At the same time, coal production is accompanied by the discharge of solid waste gangue, and its traditional treatment method is to lift it underground to accumulate on the surface. This method of handling gangue will cause serious damage to the ecological environment on the ground. [0003] The existing coal mining method of using gangue to fill the goaf is to completely fill the goaf with gangue. Although this filling coal mining method can effectively control the subsidence of the ground surface, improve the recovery rate of coal resources, and solve the problem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F15/00
CPCE21F15/00
Inventor 王德凤姜耀东
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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