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Coal mine up-dip working face slant range paste-like filling method

A paste-like technology on the working face, which is applied to filling materials, mining equipment, earth square drilling and mining, etc., can solve the problems of insufficient filling effect, difficult filling and compactness, etc., so as to avoid old empty water damage and increase paste filling Height, the effect of reducing the amount of sinking

Inactive Publication Date: 2010-11-10
新汶矿业集团有限责任公司孙村煤矿
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When filling the goaf of the working face, the paste and bleeding will flow from the high position to the low position, making it difficult to fill the high position (that is, the part above the steps) densely, and the filling effect cannot be achieved

Method used

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  • Coal mine up-dip working face slant range paste-like filling method
  • Coal mine up-dip working face slant range paste-like filling method

Examples

Experimental program
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Effect test

Embodiment Construction

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

[0013] As shown in the figure, in the process of inclined mining of the working face, two sets of retaining walls 3 and 4 are installed at the step 1 where a large drop is encountered. , stacked side by side along the advancing direction of the working face, the height of the retaining wall is 18-22cm from the top plate, and it is stacked forward as the working face is pushed forward; after the working face is pushed forward to reach a filling step, the grout wall will be removed from the working face The filling pipeline extends to the goaf, and fills the paste 2 section by section according to the sections divided by the retaining wall; so that each section reaches the specified filling height.

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Abstract

The invention discloses a coal mine up-dip working face slant range paste-like filling method. The method comprises the following steps: during the up-dip mining process of the working face, a group of dam walls are arranged on a step with larger drop height, each dam wall is formed by filling floor mud in woven bags and stacking the woven bags side by side along the advancing direction of the working face, the roof is 18-22cm higher than the dam walls, the woven bags are stacked while the push-gather of the working face is performed forward; and when the push-gather of the working face reaches a filling interval, the filling pipeline extends to the worked-out section from the working face, and the paste-like is filled in each subsection divided by the dam walls in turn so that each subsection reaches the specified filling height. By adopting the step type filling technology of the invention, the paste filling height of each place on the working face is increased, the filling effect of the worked-out section is increased and the sinking amount of the overlying roadway on the working face is reduced.

Description

technical field [0001] The invention relates to coal mining technology, in particular to goaf filling technology. Background technique [0002] At present, in order to prevent the roof from sinking in the goaf of the coal mine, a paste-like filling technology is adopted. The paste-like filling technology related to the present invention adopts high-grade general mining technology for mining, uses external injection type single pillars and metal hinged roof beams to support the roof, adopts the "see five times one" support method, and lays on top of the roof beams. Double-resistant mesh, the cycle progress is 0.8 meters, and the goaf is filled with paste every 3-4 cycles of coal discharge. [0003] In order to enhance the paste-like filling effect in the goaf, the working face is generally arranged in an inclined mining mode (generally referred to as upward mining), and the cutting holes are arranged along the coal seam. During the mining process of the working face, usuall...

Claims

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Application Information

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IPC IPC(8): E21F15/00E21F15/04
Inventor 莫技张传恕巩庆刚马德生
Owner 新汶矿业集团有限责任公司孙村煤矿
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