Multiple upper protective-seam gas burst-preventing exploitation method used in the exploitation of coal seams

A technology with multiple protection and protective layers, applied in surface mining, earth-moving drilling, underground mining, etc., can solve problems such as affecting production efficiency and economic benefits, affecting mining speed, threatening safety, etc., achieving obvious technical advantages and promotion and application prospects , the effect of reducing the cost of gas drainage and simple process

Inactive Publication Date: 2004-11-03
HUAINAN MINING IND GRP +1
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  • Description
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Problems solved by technology

The outburst danger of the coal seam seriously threatens the safety of mine production, affects the mining speed, affects the production efficiency and economic benefits

Method used

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  • Multiple upper protective-seam gas burst-preventing exploitation method used in the exploitation of coal seams
  • Multiple upper protective-seam gas burst-preventing exploitation method used in the exploitation of coal seams
  • Multiple upper protective-seam gas burst-preventing exploitation method used in the exploitation of coal seams

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Embodiment Construction

[0020] In coal seam group mining, the non-outburst coal seams B8 and B7 are selected as protective layers for mining first, then the protected outburst coal seam B6 is mined, and finally the protected outburst coal seam B4 is mined to form multiple protections for outburst coal seams ; While implementing multiple protective layer mining, combined with the pressure relief and enhanced drainage of the gas in the protected layer, the purpose of preventing coal and gas outburst in the protected layer is achieved, and the comprehensive management of gas in the protected layer is realized at the same time. The top-down mining method is adopted in the coal seam group, and the pressure relief effect of upper coal seam mining is used to improve the air permeability of the lower coal seam, and the bottom rock roadway is used to drill upward or downward through the coal seam to strengthen the gas drainage of the lower coal seam . Create conditions for efficient and intensive mining of lo...

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Abstract

The grouped coal bed exploiting method features that grouped coal bed exploiting process from top to bottom includes the first exploitation of the upper non-protuberant coal bed as protecting layer; the subsequent exploitation of lower protected coal bed; and final exploitation of the protected coal bed with ever serious protuberant danger, so as to form multiple protection of the protuberant coal bed while releasing gas pressure of the protected coal bed for forced pumping. The said method can prevent effectively coal and gas burst disaster radically to double the extracting progress, lower gas pumping cost and realize the safe and efficient intensive extraction of high gas content and low penetration coal bed.

Description

Technical field: [0001] The invention relates to a method for safe production in coal mines, more specifically a method for efficient mining of outburst coal seams. Background technique: [0002] In the Huainan mining area of ​​Anhui Province, the coal seam is deep, the coal seam is rich in gas, the air permeability of the coal seam is poor, and the risk of outburst is serious. The main outburst coal seams in Huainan mining area are: C13, B11, B6 and B4 coal seams. Before the regional outburst prevention measures were adopted for the mining of protective seams, the mining area mainly adopted regional outburst prevention measures of coal seam gas pre-pumping or local outburst prevention measures when mining outburst coal seams. The implementation of these measures has achieved some results. However, in terms of ensuring production safety and production efficiency, the desired effect has not yet been achieved. The outburst danger of coal seam seriously threatens the safety o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C41/28
Inventor 袁亮胡千庭李平孙森于尔海廖斌琛刘林叶发先夏士伯张安福孟贤正
Owner HUAINAN MINING IND GRP
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