采动影响下覆岩破坏规律的三维模拟  

Three-dimensional Simulation of Overlying Rock Failure Patterns under the Influence of Mining

作　　者：马荣坤 Ma Rongkun(China Energy Engineering Group Shanxi Power Design Institute Co.,Ltd.)

机构地区：[1]中国能源建设集团山西省电力勘测设计院有限公司,太原市030000

出　　处：《勘察科学技术》2024年第S1期98-101,共4页Site Investigation Science and Technology

摘　　要：该文以锦界矿31105工作面为工程背景,基于有限差分方法,采用流固耦合模式,对工作面回采过程中覆岩破坏阶段及导水裂隙带发育进行三维全过程数值模拟。研究结果表明:覆岩破坏过程基本分为初次垮落发生—垮落带发育—导水裂隙带快速发育—变形稳定四个阶段。当工作面开挖至40m时,此时垮落带高度为4m;当工作面推进至120m时,此阶段导水裂隙带快速发育,高度迅速增加;当工作面推进至160m时,覆岩破坏形态稳定仅随工作面推进横向发展,纵向基本不变,此时导水裂隙带发育,高度也基本稳定在53m,不再随工作面推进向上发育。Taking the 31105 working face of Jinjie Mine as the engineering background,based on the finite difference method and using the fluid-solid coupling model,a three-dimensional numerical simulation of the entire process of overburden failure stage and development of the water-conducting fractures during the mining process is carried out.The results show that the failure process of overburden can be divided into the following four stages:primary caving occurrence—caving zone development—rapid development of water-conducting fracture zone—deformation stabilization.When working face is excavated to the depth of 40m,the height of the caving zone is 4m.When working face is excavated to the depth of 120m,the water-conducting fracture zone develops rapidly and its height increases rapidly.When the working face is excavated to the depth of 160m,while overburden failure remains stable laterrally with advancement of the working face,it does not change vertically.At this time,the water-conducting fracture zone develops and the height stabilizes at 53m and no longer increases with the working face advancement.

关 键 词：导水裂隙带 数值模拟 覆岩破坏阶段 

分 类 号：TD325[矿业工程—矿井建设]