晋城矿区坚硬顶板工作面矿压显现规律研究

Study on Strata Behavior Laws at Hard Roof Working Face in Jincheng Mining Area

针对晋城矿区15#煤坚硬顶板,在开采过程中工作面矿压显现规律不清楚的难题,运用相似材料模拟试验和现场实测,研究分析坚硬顶板工作面的矿压显现规律,研究结果表明：直接顶初次垮落步距22.3~23.1 m,平均22.7 m,周期垮落步距不明显;基本顶初次垮落步距52.3~55.1 m,平均54.2 m,周期垮落步距17.1~19.4 m,平均18.2 m;工作面超前支承压力剧烈影响范围为30~35 m。

Aiming at the non-clear problem of strata behavior laws in 15# coal hard roof of Jincheng Mining Area during the mining process,using similar material simulation test and field measured,the strata behavior laws in hard roof are analyzed,the results show that the first caving of immediate roof is 22. 3 to 23. 1m,average 22. 7 m; the periodic caving interval is not obvious; the first caving of basic roof is 52. 3 to 55. 1 m,average 54. 2 m; the periodic caving interval is 17. 1 to 19. 4 m,average 18. 2 m; the violent influence range of advanced abutment pressure of working face is 30 to 35 m.