浅埋煤层上行开采可行性实验研究

 采用相似材料模拟实验方法，对陕北某矿浅理煤层上行开采的可行性进行了研究。研究表明：该矿浅理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。研究为开采类似赋存特征的其它煤矿提供了有益的借鉴。

Feasibility Experimental Study For Shallow Seams By Ascending Mining Method

Aiming at a certain coal at northern shaanxi province, using experiment method of similar material simulation, feasibility of ascending mining was researched for l shallow seam. The research shows that: after the lower coal seam was mined for the shallow seam at this coal mine, destruction of overlying rock presents the "two belts" feature and produce more crack of through the upper coal seam. The upper coal seam keeps continuity after settling and does not appear steps subsidence. When the upper coal seam was mined, roof strata mainly show rotary instability of already fracture rock mass or new fracture rock mass, working face t does not appear slide instability and steps subsidence phenomenon through the crack, and roof rock pressure is not obvious. This proved ascending mining is feasible The research has provided a useful reference for other coal mines with similar geological features.