摘要
采用相似材料模拟实验方法,对陕北东峁煤矿浅埋煤层上行开采的可行性进行了研究。研究表明:该矿浅埋煤层下部煤层开采后,覆岩破坏呈现"两带"特征,产生多条贯穿上部煤层的穿层裂隙,上部煤层沉降后保持连续,未出现台阶下沉;上部煤层开采时顶板岩层主要表现为已断裂岩块或新断裂岩块的回转失稳,工作面通过穿层裂隙处未出现滑落失稳与台阶下沉现象,且顶板矿压显现不明显,证明上行开采可行。
A similar material simulation experiment method was applied to the study on the feasibility of the ascending mining in a shallow depth seam of Shaanbei Dongmao Mine. The study showed that after the mining of the below seam of the shallow depth seam, the failure of the overburden strata would have ＂tow zone＂ features, many through strata cracks in the upper seam occurred, the upper seam would keep continued after the subsidence and there was bench subsidence occurred. After the upper seam mined, the roof strata mainly would be broken rock blocks or new broken rock blocks with rotary stability lost. When the coal mining face passed through the through strata crack location, there were no sliding stability lost and bench subsidence phenomenon occurred and the roof strata pressure was not obvious. Thus the ascending mining was feasible.
出处
《煤炭工程》
北大核心
2013年第5期4-7,共4页
Coal Engineering
基金
陕西省教育厅科研计划项目资助(12JK0783)
教育部科学技术研究重点项目资助(地方03166)
科技部国际合作项目资助(2012DEG71060)
关键词
浅埋煤层
上行开采
穿层裂隙
滑落失稳
shallow depth seam
ascending mining
cracking through strata
sliding and stability lost
