深部复杂难采矿体崩落法开采地压数值模拟分析

Numerical simulation analysis of ground pressure in deep complex and difficult mining body caving method

在我国的矿体开采中,存在部分深部复杂,开采难度大的矿体,这些矿体上部的倾角较大,通常在55-75°之间,矿体较厚,但是深部矿体的倾斜程度又由急变缓,同时矿体的剖面也发生了转变。并且,这种矿体在进行回采时,深部矿体的下盘位置应力比较集中,而上盘的位置还会存在着悬顶的危险。这种危险会在开采深度不断增加的情况下愈发严重,同时矿山地压的活动也会变的越来越复杂,从而造成了在矿山开采中,加大了工程的布置与维护的难度。

In the mining of orebodies in China,there are some complex and difficult orebodies in the deep part.The upper part of these orebodies has a large dip angle,usually between 55 and 75 degrees,and the orebodies are thicker,but the dip of the deep orebodies has changed from rapid to slow,and the profile of the orebodies has also changed.Moreover,when this kind of orebody is mining,the stress in the lower wall of the deep orebody is relatively concentrated,and the hanging roof danger still exists in the upper wall.This kind of danger will become more and more serious with the increasing depth of mining,and the activity of ground pressure will become more and more complex,which makes the layout and maintenance of engineering more difficult in mining.