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煤炭工程  2012 

薄基岩厚度变化对采场矿压显现的影响研究

, PP. 48-50

Keywords: 浅埋煤层,薄基岩,综采,矿压规律

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Abstract:

厚松散层覆盖的极薄基岩顶板条件下安全开采问题,是制约神东矿区高产高效的关键所在。本文结合大柳塔煤矿22614工作面矿压实测资料,研究了基岩变薄区-变厚区矿压显现规律特征,从矿压控制理论角度探讨了基岩厚薄变化区的矿压显现强度不同的机理。研究结论(1)基岩变薄区来压强度小于变厚区;(2)基岩最薄区容易发生溃砂事故;(3)变薄区前的基岩正常区和变厚区后的基岩正常区,其来压强度相当;(4)基岩厚度薄,周期来压步距小,周期来压强度大;(5)相同基岩等级区域基岩变薄区比变厚区周期来压步距小、来压强度小,动载系数小。

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