Coalface stability of large mining height panel in steeply dipping coal seam

摘要：

　　Coalface stability of high cutting face in steeply dipping coal seam will directly affect the face safety and efficient production.Based on the plasticity area theory, D-P-Y criteria and limit equilibrium theory, the equations for computing the stress and width of plastic zones under the condition of high cutting height in steeply dipping coal seams were obtained., Analysis shows that the false dip angle and mining height are the main factors affecting the stability of coalface.Comparison of results between numerical simulation and underground monitoring indicates that when the mining height is larger, the coalface is less stale and the false dip angle leads to the stress and displacement in coalface being distributed in lower>middle>upper area type distribution.The smaller is the area the less stable is the coalface.

关键词： three-dimensional model coal face stress D-P-Y criteria plasticity area

作者: Wu Yongping Zhang Hao Xie Panshi Zeng Youfu

作者单位: School of Mineral Engineering , Xian University of Science and Technology,China Key Laboratory of Western Mine Exploitation and Hazard Prevention Ministry of Education , Xan 710054 , China

会议类型: 国际会议

会议名称: The 34th International Conference on Ground Control in Mining (ICGCM) 2015(34届国际采矿岩层控制会议)

会议地点: 焦作

会议语种:英文

页码: 69-73

在线出版日期: 2015-10-17（万方平台首次上网日期，不代表论文的发表时间）