覆岩离层动态发育规律的实验研究  

Experimental Study on Dynamic Developing Law of Overburden Separation

作　　者：王素华[1] 宋朝亮 刘永 WANG Su-hua;SONG Chao-liang;LIU Yong(College of Water Conservancy and Civil Engineering/Shandong Agricultural University,Tai’an 271000,China;Water Conservancy Bureau of Dezhou City Shandong Province,Dezhou 253000,China)

机构地区：[1]山东农业大学水利土木学院,山东泰安271000 [2]山东省德州市水利局,山东德州253000

出　　处：《山东农业大学学报（自然科学版）》2020年第4期663-667,共5页Journal of Shandong Agricultural University：Natural Science Edition

摘　　要：煤炭开采过程中,上覆岩层中有离层的产生,而且离层的发育是有一定规律的,正确掌握这一规律对合理进行离层带注浆具有重要意义。通过实测资料和理论分析得出:上覆岩层中会同时存在多个离层,当岩层移动达到拐点即最大下沉速度时,离层迅速发育。在非充分或者极非充分采动条件下,覆岩内的离层会长期存在,注浆后可有效减轻或避免由于流变效应或采区周围采动影响引起的二次沉陷问题。Some laws governing overburden separated layers exist in coal-mining process,which are useful for reasonable filling in the overlying strata.Based on field datum and theoretical study,a series of results about layer splitting laws have been elicited.A lot of splits exist synchronously in the overburden stratum,and when the strata reaches maximum value of subsidence speed due to underground mining,layer split will be soon produced..Bed separations will have existed in the overlying rock for a long time under the non-full and non-fullest mining.After grouting,it can be reduced or avoided secondary subsidence which are caused by rheological effects or mining influence in mining areas.

关 键 词：离层 发育规律 实验研究 

分 类 号：TD325[矿业工程—矿井建设]