何庄煤矿炮采放顶煤工作面矿压显现规律研究

Study on Laws of Rock Pressure Appearance at Blasting Caving Coal Face in Hezhuang Coal Mine

为了掌握矿山压力显现规律，为安全生产提供依据，对何庄矿11013工作面（三软煤层）矿压显现进行了研究，在该工作面布置了3个测站，进行了长达22d的矿压观测。结果表明：周期来压的周期一般在8～12d，来压步距7～8m，来压现象不明显，荷载小于支柱额定工作阻力的70％，且工作阻力与支柱初撑力相差不大。

In order to grasp the law of the rock pressure effectively, providing the basis for the later safety in production, the 11013 working face （three soft coal seam） was studied,3 stations were laid out there and a 22-day-long rock pressure observation was made. The results show that the periodic weighting＇s cycle is about 8 ~ 12 days commonly,the pressure step is about 7 - 8 m, the phenomenon of the pressure is not obvious, the load is much less than 70% of the rated working resistance, and differences in working resistance and hydropost setting pressure is not significant.