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Research of No.9 coal seam floor's fracture regularityin Xiandewang Coal Mine

Ying Qiang Guan

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Abstract

According to the data of insitu stress measurement in Xiandewang Coal Mine,by usage of 3D-σ program, simulated the dig effect at the different level, calculated the stress and displacement of the surrounding rock and distributive state of the fracture area after extraction at the different level. The influence regularity of coal seam floor was analyzed, the equation of the coal seam floor's failure depth was provided. It is 915 m that the most data of No9 coal seam floor's fracture in Xiandewang Coal Mine.

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What this paper is about

According to the data of insitu stress measurement in Xiandewang Coal Mine,by usage of 3D-σ program, simulated the dig effect at the different level, calculated the stress and displacement of the surrounding rock and distributive state of the fracture area after extraction at the different level. The influence regularity of coal seam floor was analyzed, the equation of the coal seam floor's failure depth was provided. It is 915 m that the most data of No9 coal seam floor's fracture in Xiandewang Coal Mine.

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Available abstract

According to the data of insitu stress measurement in Xiandewang Coal Mine,by usage of 3D-σ program, simulated the dig effect at the different level, calculated the stress and displacement of the surrounding rock and distributive state of the fracture area after extraction at the different level. The influence regularity of coal seam floor was analyzed, the equation of the coal seam floor's failure depth was provided. It is 915 m that the most data of No9 coal seam floor's fracture in Xiandewang Coal Mine.

Key concepts: Coal mining, Coal, Mining engineering, Geology, Fracture (geology), Geotechnical engineering, Problems in coal mining, Petroleum engineering

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