Calculation and application on elastic-plastic coal pillar width of the stope

摘要：

Based on the SMP failure criterion which takes into consideration the influence of middle principal stress of clayey stuff, considering stress conditions on gob and roadway, the formula of the coal pillar width is inferred. In the meantime, the plastic-zone width of the coal pillar in plane strain is inferred by use of the limit equilibrium method. Compared with result obtained by Mohr-Coulomb failure criterion by changing the coal internal friction angle and cohesion, it shows that the traditional approach failed to make fully consideration of ultimate strength of the coal, and coal pillar size was designed conservatively. The calculation on coal pillar width based on SMP failure criterion is not only effective, but it will also take an important significance in the secure and efficient production of the coal mine.

关键词： coal pillar SMP failure criterion plane strain elastic-plastic width

作者: Jia Shuang-Chun Wang Jia-chen Zhu Jian-ming

作者单位: Faculty of Resources & Safety Engineering, China University of Mining & Technology (Beijing) (CUMTB) College of Civil Engineering, North China University of Technology, Beijing 100041, China

会议类型: 国际会议

会议名称: The First International Symposium on Mine Safety Science and Engineering (首届矿山安全科学与工程学术会议)

会议地点: 北京

会议语种:英文

页码: 1250-1259

在线出版日期: 2011-10-27（万方平台首次上网日期，不代表论文的发表时间）