分层开采对覆岩及含水层影响的相似模拟试验研究

摘要

以山西省长治市屯留县常村煤矿地质条件为原型,运用相似理论进行试验,对煤层开采引起的上覆岩层的移动变形规律以及对上覆含水层影响进行研究.相似试验结果表明,随着煤层开采厚度的增加,覆岩整体发生下沉,且下沉量逐渐增大;覆岩裂隙的发育与开采工作面推进距离呈现一定的规律性;裂隙随分层开采逐渐发育,虽未导通隔水层,但造成了含水层的疏干.%Taking the geological conditions of Changcun Coal Mine in Tongliu County,Changzhi,Shanxi as a prototype,the similarity theory is applied to research the behavior of overlying rock movement and the effect on overlying aquifer caused by coal mining.The results of similarity experiment show that:(a) with the increase of coal mining thickness,the strata occur sink as a whole and the subsidence increases gradually;(b) the development of fractures in overlying rock and the extension distance are regular;and (c) the fractures are gradually developed with slice mining,and although not break over aquifer,but causes the unwatering of aquifer.