Influences of Key Stratum on the Deformation Laws of Surface Gas Drainage Boreholes

摘要：

In order to determine the reasonable position of the surface gas drainage boreholes, the deformation laws of the upper overburden during the forwarding of the mining should be studied first. Based on this, Xieqiao 1242(1) and Zhangbei 11418(w) working faces were simulated respectively with 3-D models by using the numerical simulation software ANSYS. The influences of the key strata on them were studied. Results show that the movement of the key stratum controls the deformation of strata above; the relative horizontal displacement of the strata which are closely under the key stratum or the sub-key stratum is much larger than that of strata above the key stratum. The rupture of the gas drainage boreholes may probably happen near these places. Meanwhile, the relative horizontal displacement near the airway is smaller than that far way from the airway. Therefore, it is reasonable to drill boreholes near the airway. The results are rather close to the actual measurement value.

关键词： numerical simulation surface borehole gas drainage key stratum relative displacement

作者: CHENG Guoqiang YAN Jingjing HU Qianting LIANG Yunpei

作者单位: Key Laboratory of Mine Disaster Prevention and Control , University of Science and Technology, Qingd Key Laboratory of Mine Disaster Prevention and Control , University of Science and Technology, Qingd Key Laboratory of Mine Disaster Prevention and Control , University of Science and Technology, Qingd

会议类型: 国际会议

会议名称: The 2007 International Symposium on Safety Science and Technology(2007采矿科学与安全技术国际学术会议)

会议地点: 河南焦作

会议语种:英文

页码: 1407-1411

在线出版日期: 2007-04-17（万方平台首次上网日期，不代表论文的发表时间）