综采工作面坚硬顶板弱化技术研究  

Study on weakening technology of hard fixed plate in fully mechanized mining face

作　　者：鲁蒙[1] 舒梅 周横全 LU Meng;SHU Mei;ZHOU Hengquan

机构地区：[1]煤炭工业石家庄设计研究院贵州分院,贵州贵阳550001

出　　处：《中国矿山工程》2021年第2期51-54,共4页China Mine Engineering

摘　　要：为避免坚硬顶板综采工作面回采期间采空区覆岩大面积垮落带来的安全问题,以1501综采工作面回采为工程背景,在对5号煤层顶板岩层进行分析基础上,结合矿井生产实际,提出采用深孔预裂爆破技术方法对顶板坚硬中粒砂岩进行弱化处理,并详细对顶板弱化技术选择、弱化技术方案以及现场应用效果进行分析与研究。现场应用后,工作面开采时顶板初次来压步距缩短至19.5 m,采空区不会出现大面积悬空问题,为工作面生产创造了良好条件。In order to avoid the safety problems caused by the large area collapse of the overlying rock in the goaf during the mining period of the fully mechanized working face with hard roof, taking 1501 fully mechanized working face as engineering background, based on the analysis of No.5 coal seam roof strata,combined with the practical application, the paper puts forward the technology of weakening hard roof by deep hole blasting. After field application, the first weighting step of the roof is shortened to 19.5 m, and there will be no large area hanging in the goaf, which creates good conditions for the production of the working face.

关 键 词：坚硬顶板 综采工作面 大采高 采空区 顶板弱化 

分 类 号：TD235[矿业工程—矿井建设]