近距离采空区下回采巷道支护技术研究

doi:10.11799/ce201802012

Abstract

Abstract: Abstract: According to the problem of multi seam mining in the process of interlayer distance changes at Zhuangshang coal mine in Liulin,Shanxi province, by means of theoretical analysis combined with numerical calculation, determined the stress and plastic zone distribution law under coal pillar, determined the contrary of interlayer distance changes with different support mode: when the interlayer distance changes in 4-5m,take the way of erection single prop, shorten the length of anchor to support roadway roof, strengthen support of the coal wall near the pillar side to reinforcement support. when the interlayer distance changes in 5-7m,no need to erection single prop,increase the the length of anchor to 4.5m.Through the analysis of pressure observation results during the mining period, the control of surrounding rock of roadway is basically stable, the supporting scheme satisfied the demand of safe mining.

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URL: http://www.coale.com.cn/EN/10.11799/ce201802012

http://www.coale.com.cn/EN/Y2018/V50/I2/43

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Study on the Control of Surrounding Rockin the Under Goaf Coal Seam

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