Deep inclined coal seam mining roadway mine pressure control mining method

A technology of mining roadway and mining method, which is applied in ground mining, mining equipment, underground mining, etc., and can solve problems such as excessive mine pressure in the mining roadway

Inactive Publication Date: 2015-07-15
CHINA UNIV OF MINING & TECH
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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of excessive mine pressure in mining roadways in deep inclined coal seam working faces, combined with the advantages of filling and mining, to provide a mining method for controlling mine pressure in mining roadways in deep inclined coal seams

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  • Deep inclined coal seam mining roadway mine pressure control mining method

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings and examples.

[0024] Taking the mining area of ​​a deep inclined coal seam as an example, the mine is mining the No. 7 coal seam in the Ⅲ5 mining area. The depth of the coal seam is -620m~-950m, the average inclination angle is 15°, and the average thickness of the immediate roof is 1.40m. It is mainly gray mudstone. The average thickness of the basic top is 5.52m, mainly dark gray sandy mudstone, and the average thickness of the immediate bottom is 4.15m, mainly gray black mudstone. In the process of mining in adjacent mining areas at the same level, small coal pillars of 7m were left between the working faces, and the section shrinkage rate of the mining roadway reached 60% during the trial period. In view of this situation, mining area Ⅲ5 adopts backfill mining strips and fully mechanized mining Coal seam mining method with coordinated arrangement of working faces t...

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Abstract

The present invention relates to a deep inclined coal seam mining roadway mine pressure control mining method. According to the method, the filled mining strip and the fully mechanized mining work face are subjected to coordination arrangement, wherein the one fully mechanized mining work face is arranged between each two filled mining strips; and after the mining of the filled mining strip is completed, the mining roadway is adopted as the mining roadway of the middle fully mechanized mining work face by using the gob-side entry retaining method, the filled work face is arranged in a rising manner, the advancing mining is performed, the fully mechanized mining work face is arranged in a dip manner, the retreating mining is performed, the width of the filled mining strip is 35-45 m, and the width of the fully mechanized mining work face is 3-4 times the width of the filled strip. With the method of the present invention, the problem of the influence of the near goaf concentrated stress on the mining roadway is fundamentally solved, the mine pressure appearing of the gob-side entry retaining country rock is effectively controlled, the country rock deformation of the roadway is reduced, the safe mining of the mining area work face is ensured, the resource loss caused by the protection coal pillars between the work faces is reduced through the gob-side entry retaining technology, and the recovery rate of the mining area reduces is improved.

Description

technical field [0001] The invention relates to a coal seam mining method for controlling the mine pressure of a back mining roadway in a deep inclined coal seam, in particular to a coal seam mining method for controlling the mine pressure of a back mining roadway by adopting a coordinated arrangement of filling mining strips and fully mechanized mining working faces. Background technique [0002] In the eastern part of my country, with the gradual depletion of shallow coal resources, many mines have entered the stage of mining deep coal with a depth of more than 800m. In order to improve the recovery rate of this part of coal resources, generally only A small coal pillar of 5-8m is set as the protective coal pillar of the working face. In the actual production process, when the inclination angle of the coal seam is large, the surrounding rock deformation of the mining roadway in the working face is seriously deformed under the influence of factors such as high ground stress,...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C41/16E21F15/00
CPCE21C41/18E21F15/00
Inventor 巨峰殷伟李百宜方坤韩晓乐
Owner CHINA UNIV OF MINING & TECH
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