摘要
针对浅埋近距离煤层易受重复采动导致覆岩裂隙发育不规律的问题,以榆树泉煤矿近距离煤层为背景,利用理论计算与数值模拟分析煤层覆岩破断规律。回采下层煤产生的断裂覆岩与回采上层煤造成的垮落顶板达到新的平衡,向上发育新的裂隙,最终高度83 m。利用双端堵水器探测水量漏失流速发现近距离上、下煤层回采时覆岩裂隙高度分别为46 m、85 m。
In view of the irregular development of overburden rock fissures caused by repeated mining in shallow burial and short distance coal seam,taking the short distance coal seam in Yushuquan Coal Mine as the background,the fracture law of coal seam overburden rock is analyzed by theoretical calculation and numerical simulation.The fault overburden rock caused by mining lower coal and the caving roof caused by mining upper coal reach a new balance,new fissures are developed upward,and the final height is 83 m.Using the double-end water stopper to detect the water leakage velocity,it is found that the overburden rock fissures height is 46 m and 85 m respectively in the upper and lower coal seam.
作者
赵飞
Zhao Fei(Kuche Country Kexing Coal Industry Co.,Ltd.,Xinjiang Kuche 842000)
出处
《山东煤炭科技》
2022年第7期40-43,共4页
Shandong Coal Science and Technology
关键词
近距离
煤层
裂隙
高度
close range
coal seam
fissures
height
