杜儿坪煤矿上保护层开采相似模拟实验研究  

Similar simulation experiment study on upper protective layer mining in Duerping Coal Mine

作　　者：王晓东 Wang Xiaodong(Shanxi Xishan Coal Power Co.,Ltd.,Taiyuan 030053,China)

机构地区：[1]山西西山煤电有限责任公司,山西太原030053

出　　处：《能源与环保》2025年第2期248-252,258,共6页CHINA ENERGY AND ENVIRONMENTAL PROTECTION

基　　金：国家自然科学基金面上项目(52074283)。

摘　　要：为掌握上保护层开采下顶底板岩层以及被保护层的应力变化和位移变形规律,也为了揭示上保护层开采对被保护层所产生的卸压效果,以杜儿坪煤矿北三采区的上保护层(8号煤层)和被保护层(8煤层)为地质背景,通过搭建相似模拟实验平台,开展了上保护层开采相似模拟实验研究。实验结果表明,8号煤层开采后最大膨胀变形率为11.3%;对被保护层进行应力监测得出了工作面前方32 m内为应力集中区,工作面前方32 m外为原始应力区,工作面后方51 m内为卸压区,工作面后方51 m之外为应力恢复区;经过现场对被保护层变形量和透气性系数的测量,验证了上保护层开采时所产生的卸压效果。In order to grasp the stress change and displacement deformation laws of the roof and floor rock layers and the protected layer under the mining of the upper protective layer,and also to reveal the pressure relief effect of the mining of the upper protective layer on the protected layer,taking the upper protective layer(No.8 coal seam)and the protected layer(No.8 coal seam)in the Beisan mining area of Duerping Coal Mine as the geological background,and the similar simulation experiment research on the mining of the upper protective layer was carried out by building a similar simulation experimental platform.The experimental results show that the maximum expansion and deformation rate of the No.8 coal seam after mining is 11.3%;the stress monitoring of the protected layer shows that the stress concentration area is within 32 m in front of the working face,the original stress area is outside 32 m the front of the working face,the pressure relief area is within 51 m behind the working face,and the stress recovery area is outside 51 m behind the working face.Through the measurement of the deformation and air permeability coefficient of the protective layer on-site,the pressure relief effect of the upper protective layer during mining was verified.

关 键 词：上保护层开采 被保护层 卸压效果 相似模拟实验 

分 类 号：TD325[矿业工程—矿井建设]