单一综放开采导水裂缝带形成机制研究  

Forming mechanism of water crack zone by singleness sub-level caving mining

作　　者：王东[1] 段克信[1] 李强[2] 

机构地区：[1]辽宁工程技术大学资源与环境工程学院,辽宁阜新123000 [2]沈阳煤炭科学研究所,辽宁沈阳110004

出　　处：《水资源与水工程学报》2011年第3期63-67,共5页Journal of Water Resources and Water Engineering

摘　　要：水体下采煤过程中,由于采空区围岩的应力重新分布,将产生变形、位移乃至破坏,若波及到上覆水体,则易发生透水事故,严重威胁矿井安全生产。应用岩石破裂过程分析RFPA2D系统,数值模拟再现了单一综放开采条件下覆岩变形破坏的动态发展过程;通过对模拟结果的分析,得出了导水裂缝带的分布特征、位移分布、应力分布及地表裂缝形成的原因,阐明了覆岩的破坏机理和单一综放开采条件下导水裂缝带的形成机制,揭示了采动影响下覆岩的破坏规律。结果表明,导水裂缝带的形成是一个渐进的过程,开挖造成上覆岩层不同区域拉应力分布的差异是造成导水裂缝带形成的根本原因。In the procerss of coal mined under the water bodies,because the stress around the strata will be redistributed,so the deformation,displacement and failure will occur.The failure＇s entering into the water will cause the water accident,which endangers the safe operation of coal mines.With rock failure process analysis RFPA2D system,the numerical simulation reproduced the whole progressive process of the overlying strata caused by mining excavation.By analysis of the analog result,the distributional characteristics of water crack zone,the displace maint and stress distribution and the cause to form the earths surface cracks had heen obtained,the failure mechanism of the overlying strata and the forming mechanism of the water fractured zone under the londieion of singleness sub-level caving mining were demonstrated,which indicated the rule of the failure of the overlying strata caused by mining excavation.It showed that the formation of the water crack zone was progressive and the difference stress distribution due to the mining was the major reason.

关 键 词：单一综放开采 导水裂缝带 数值模拟 形成机制 

分 类 号：P641.8[天文地球—地质矿产勘探]