榆树湾煤矿20119工作面大采高矿压显现规律研究

Study on Strata Behavior Law of Large Mining Height at 20119 Working Face of Yushuwan Coal Mine

针对特厚煤层大采高工作面支架的选型和顶板的管理问题,以榆树湾煤矿20119工作面为例,通过对工作面来压步距、支架工作阻力及支架载荷分布的观测,分析矿压显现特征和顶板来压规律。结果表明:工作面可分为上、中、下3个分区,周期来压步距10.2~25.2 m。工作面平均工作阻力29 MPa,来压时的强度39 MPa,应加强矿压观测,及时做出支护调整。

Aiming at the management and selection of extremely thick seam mining roof support with high surface, taking Yushuwan coal mine 20119 working face as an example, based on the working face roof weighting step,the working resistance and the load distribution of support, analysis of characteristics of strata behavior and roof pressure law. The results show that the working face can be divided into three partitions： upper, middle and lower, and the periodic weighting length is 10.2 - 25.2 m, the average working resistance of the working face is 29 MPa, and the ground pressure strength is 39 MPa,the pressure observation should be strengthened and the adjustment should be made in time.