Subsidence, Bed Separation and Stress Change during Longwall Mining

摘要：

A comprehensive field geotechnical monitoring program was carried out at West Cliff Colliery, Australia, which included one deep hole extensometer, two piezometers and two near-surface biaxial stressmeters installed at the bottom of a small valley above Longwall 32. A subsidence survey was carried out along two cross lines centered at the deep hole extensometer. The aim of this study was to determine the strata movement in the overburden rock mass in order to determine the injection horizons and evaluate injection efficiency for using the overburden grout injection technology to control subsidence. It was also aimed to monitor the nearsurface stress change to understand the mechanism of river bed fracturing and valley closure. This paper presents the new findings from this field monitoring study.

关键词： Subsidence Bed separation Stress change Overburden Longwall mining

作者: SHEN Baotang

作者单位: CSIRO Earth Science and Resource Engineering, PO Box 883, Kenmore, Brisbane, Queensland 4069, Australia

会议类型: 国际会议

会议名称: 2010 International Conference on Mine Hazards Prevention and Control(第二届矿山灾害预防与控制国际学术会议 ICMHPC)

会议地点: 青岛

会议语种:英文

页码: 503-510

在线出版日期: 2010-10-15（万方平台首次上网日期，不代表论文的发表时间）