Photoelastic Ezperimental on Stress Field of Surrounding Rock in Deep Strip Pillar Mining
Strip pillar mining is the effective techniques to control mining subsidence, protect surface structures and ecological environment in China. With the increase of mining depth, deep mining problems under structures are more and more serious. Deep wide strip pillar mining is being used step by step in Chinas coal mines. The stress distribution law in the surrounding rock of deep strip pillar mining is the theoretical basis of study of overburden strata failure mechanism. Based on the geological and mining conditions of the coal mine in FengFeng, three photoelastic experiment simulation models were set up through changing the mining depth. The mining width and pillar width, recovery ratio, and the strip pillar numbers are the same in those three models. The similarity theory and the photoelastic experiment method were used to study the stress distribution law of the surrounding rock in deep wide strip pillar mining under different mining depths. The stress distribution law of the surrounding rock under different depths were compared and analyzed. Some basic laws of stress distribution and stress concentration were obtained as mining depth changed. And the results have some theoretical guidance purpose for optimization designs of deep strip pillar mining.
deep mining strip pillar mining photoelastic ezperiment stress filed
Guo Wenbing Liu Yixin Zhang Peng
School of Resources Science & Engineering, Henan Polytechnic University, Jiaozuo 454003 , China School of Resources and Safety Engineering, China University of Mining and Technology (Beijing), Bei
国际会议
The 3rd International Symposium on Modern Mining & Safety Technology Proceedings(第三届现代采矿与安全技术国际学术会议)
辽宁阜新
英文
216-220
2008-08-04（万方平台首次上网日期，不代表论文的发表时间）