老旧矿井复采工作面矿压显现规律研究

Study on strata behavior regularity of second miming face in old mine

以圣华矿3101复采工作面为研究对象,得出了复采工作面矿压显现规律。相比于常规工作面而言,复采工作面来压步距较短,来压强度较大,前、后立柱载荷不均衡,矿压显现更为明显;过冒顶区时支架工作阻力相对非冒顶区较小,煤壁片帮有加剧趋势。

Taking the 3101 second mining face in Shenghua Mine as the research object, stra- ta behavior regularity of the second miming face was studied. The results showed that the second miming face had shorter weighting steps, larger ground pressure strength and more obvious stra- ta behaviors compared with the normal working face, and loads of front and rear pillars were un- balanced, and there was a smaller support working resistance and more serious rib spalling when passing through the roof falling zone compared with normal zone.