基于基本顶悬顶长度的窄煤柱合理宽度确定

doi:10.11799/ce201702004

Abstract

Abstract: In this paper, aiming at the adverse effects of main roof’s hanging roof length on the stability of narrow coal pillar, theoretical analysis and numerical simulation are used to study the excavation position and the reasonable width of narrow coal pillar. The results show that the length of hanging roof in main roof can directly affects the stability of the roadway surrounding rock. In order to make the fracture line located inside the coal wall, improve the stability of the surrounding rock and the supporting capacity of coal pillar, ascertaining that the reasonable width of coal pillar is 5m. The industrial test show that the selection of the roadway’s position and the width of narrow coal pillar are scientific and reasonable, and satisfactory technical and economic effects are achieved.

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TD822+.3

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URL: http://www.coale.com.cn/EN/10.11799/ce201702004

http://www.coale.com.cn/EN/Y2017/V49/I2/10

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Rational width of narrow coal pillar based on the main roof’s hanging roof length

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