为解决桑树坪煤矿11号煤带压开采底板隔水层厚度不足问题,研究了以奥陶系灰岩顶部为工作层的防治水技术方法.分析了3105工作面带压开采的条件,论证了奥陶系灰岩顶部工作层的必要性,研究了奥陶系灰岩顶部的隔水性能,确定了工作层在奥陶系灰岩中的深度,给出了工作层内奥陶系灰岩的探查治理方法,总结了3105工作面所实施的各项防治水工程.实践证明,以奥陶系灰岩顶部为工作层开展防治水后,工作面可安全回采.%To solve the issue of watertight stratum thickness insufficient during the mining under safe aquifer water pressure of coal No.11 in the Sangshuping coalmine , put forward a water control means regarding the Ordovician limestone top as a working layer .Thus analyzed working face No .3105 mining under safe water pressure of aquifer condition , demonstrated the necessity of regarding Ordovi-cian limestone top as a working layer .Then studied the watertight performance of Ordovician limestone top , determined the depth of working layer in Ordovician limestone , given out Ordovician limestone exploration and governing means within working layer , summa-rized working face No.3105 implemented various water control engineering .The practices have proved that water control regarding Or-dovician limestone top as working layer , so that working face can be safely extracted .
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