孤岛煤柱综放开采冲击危险性研究

Impact risk of island pillar comprehensive caving mining

我国煤矿各种"孤岛"采场中,有大量的全部区段回采结束后留下的采区煤柱类"孤岛"采场,由于采场中分布有大量的废旧巷道,导致开采难度增加,而二面或三面,甚至四面采空使得矿压显现十分突出,冲击矿压的危害显著增加,煤柱中的旧巷及断层使得"孤岛"采场开采面临的问题和安全隐患都更加突出。针对杨村煤矿315工作面面临三面采空、旧巷密布及断层横穿等诸多不利因素,从地质条件、采矿影响两个方面来分析315面开采的冲击危险性。

There are many coal mine ＂island＂stopes left after the mining in China.The mining difficulties are increased in these mines because of the large number of abandoned roadways in the＂ island＂ stopes.The two or three face,even all around goafs make the mine pressure reveal very prominent and the harm of rock-burst increased significantly.The old lanes and faults make the ＂island＂ stope mining more difficult than other stopes.Impact risks of Yangcun coal mine 315 coal face are analyzed from the aspects of geological condition and mining influence,which faces the factors of three face worked-out,dense old lanes and cross faults.