Simulation on Deformation and Failure Characteristics of Mining Floor at Deep Double-longwall Face

NIU Jianchun; ZHANG Jinling; DING Yaheng; WANG Bingdu; ZHU Shuyun

Safety in Coal Mines > 2016 > 47(3): 182-186.

NIU Jianchun, ZHANG Jinling, DING Yaheng, WANG Bingdu, ZHU Shuyun. Simulation on Deformation and Failure Characteristics of Mining Floor at Deep Double-longwall Face[J]. Safety in Coal Mines, 2016, 47(3): 182-186.

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Simulation on Deformation and Failure Characteristics of Mining Floor at Deep Double-longwall Face

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Published Date: March 19, 2016

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Abstract

Abstract

In order to explore the deformation and failure characteristics of mining floor at deep double-longwall face, based on the geological and mining conditions of the typical deep double-longwall face in complete area in Chengjiao Coal Mine, the groups of rock mass are divided; the 3D engineering geologic model for the double-longwall face is established. The distribution characteristics of the plastic zone and the maximum vertical stress are analyzed after fully mining in different floor depths; there are quite obvious zoning features for the two important parameters in the deepening direction of mining floor, and they have a good consistency in the aspect of judging the failure depth of floor, the failure depth of the mining floor at working face is about 27 m.
- deep floor deformation and failure,
- double-longwall face,
- vertical stress,
- plastic zone,
- numerical simulation

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