Discussion on Technology of The Secondary Mining of Strip-pillar Area
For a long time, mining coal under buildings, water bodies and railways(under three for short) mainly apply technology of strip mining in China, whose effect of ground subsidence control is good, but coal recovery is low (about 40％). As coal resources has been decreasing, whether a large of coal left in strip-pillar area can be recycled or not has become one of the most urgent and difficult technical problems. This paper studied the lows of ground movement and the characteristics of rock destruction through numerical simulation. It also analyzed problems existed in the course of the secondary mining of strip-pillar area: hidden danger for failure instability of underground strip pillar and the severe damage of surface buildings. We cite an example that the strip-pillar area in a coal mine has been designed to the secondary mining and the preliminary practice has taken good effect. So we hope it can be used to provide experience in similar conditions for the future of strip-pillar area mining.
strip mining the secondary exploiting ground subsidence rock destruction
Dai Huayang Yi Sihai Hao Yanjin
China University of Mining & Technology (Beijing), Beijing 100083, China North China Institute of Science and Technology, Beijing 101601, China
国际会议
香港
英文
1-5
2009-05-19（万方平台首次上网日期，不代表论文的发表时间）