大采高工作面覆岩移动规律数值模拟

Numerical Simulation on the Law of Overlying Strata Movement of Large Mining Height Face

针对赵固二矿11050工作面采高6 m,工作面回采过程中矿压显现明显的具体情况,采用数值模拟方法,研究了薄基岩大采高工作面的覆岩移动规律。结果表明11050工作面直接顶及老顶初次冒落步距分别为17 m和35 m,老顶周期冒落步距为11~16 m,工作面推进到60 m时,岩层移动角在开切眼处为62°左右。该研究成果为保障11050工作面安全高效生产以及为类似条件下覆岩移动规律研究提供了依据。

The mining height of 11050 working face in No. 2 Coal Mine of Zhaogu is 6 m,and strata behaviors are obvious in the process of face mining,According to the situation,the law of overlying strata movement of large mining height face with thin bedrock is numerical simulated. The simulation results shows that,the first weighting step of immediate roof and main roof is 17 m and 35 m respectively,and periodic weighting step distance of main roof is from 11 m to 16 m. When mining distance is 60 m,thedisplacement angle of strata is nearly 62° at open-off cut. The above research results can provide some reference for ensuring the safe and efficient production of 11050 working face and the study on the law of overlying strata movement with similar condition as well.