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井下回采工作的安全,首先取决于顶板管理的设计参数要符合开采的实际条件。当开采难管理顶板的煤层时,这点尤为重要,其典型代表是北厍兹巴斯煤炭生产联合企业的“布托夫斯卡亚”矿井的库姆巴诺夫斯基煤层。这里,在每个采区范围内,通常都遇到矿压集中区,它分布于距切眼40～60m的范围内,并发生在初次放顶的时候。为了提高上述区域回采工作的安全性,用单位额定强度P_(H·C)更高的1MKM支架(其P_(H·C=0.4MPo)代替IIMKэ支架(其P_(H·C=0.28MPa),并利用钻孔爆破的方法强制放顶。但是,上述措施不能改善初次放顶期间的综采机组的开采条件。
Underground mining safety, first of all depends on the design of roof management parameters to meet the actual conditions of exploitation. This is particularly important when mining difficult-to-manage roof seams, typically represented by the Kombanovsky seam at the “Butovskaya” mine in the North Zizi-Bass Coal Production Complex. Here, in each mining area, usually met the pressure area, it is located in the range of 40 ~ 60m away from the cut, and occurred at the time of initial caving. In order to improve the safety of the mining work in the above areas, the IIMK stent was replaced by P_ (H · C = 0.4 MPo) with 1M unit MFM (P_ (H · C) 0.28 MPa) , And using the method of drilling blasting to force roofing.However, the above measures can not improve the conditions of the fully mechanized mining unit during the initial caving period.