摘要
针对螺旋钻开采薄煤层保护层的条件,采用相似模拟实验,模拟薄煤层钻采后上覆岩层运动破断规律,确定了岩层破坏形式与裂隙发育特征。在近距离煤层群开采时,采用钻采方式开采保护层能够在不破坏被保护层整体结构的同时,起到有效卸压作用。钻采工作面覆岩运动规律与顶板位移与长壁工作面存在差异。
Aiming at the conditions of auger mining in thin coal protective layer, a similar simulation experiment is adopted to simulate the movement rule of overlying strata by auger mining, and the failure mode and fracture development characteristics of strata are determined. In coal seam group with close distance, the usage of auger mining in protective layer can play an effective role in pressure relief without destroying the whole structure of the protected layer. There is a difference between auger mining and longwall mining in strata movement and roof displacement.
引文
[1]何满潮,谢和平,彭苏萍,等.深部开采岩体力学研究[J].岩石力学与工程学报,2005(16):2 803-2 813.
[2]国家煤矿安全生产监察局.煤矿安全规程[M].北京:煤炭工业出版社,2011.
[3]涂敏,袁亮,缪协兴,等.保护层卸压开采煤层变形与增透效应研究[J].煤炭科学技术,2013,41(1):40-43,47.
[4]王海锋,程远平,吴冬梅,等.近距离上保护层开采工作面瓦斯涌出及瓦斯抽采参数优化[J].煤炭学报,2010,35(4):590-594.
[5]张建甫.极薄煤层钻采上覆煤层卸压变形及渗透性演化规律[J].煤矿安全,2011,42(1):30-34.
[6]刘海波,程远平,宋建成,等.极薄保护层钻采上覆煤层透气性变化及分布规律[J].煤炭学报,2010,35(3):411-416.
[7]宋苏,赵建忠,冯淦,等.薄煤层钻采对岩层移动及地表下沉影响研究[J].煤炭技术,2016,35(7):68-70.
[8]柴永兴,王海峰.钻采极薄保护层上覆煤层渗透率演化规律研究[J].煤炭技术,2011,30(4):72-74.