Stability analysis and width determination of small chain coal pillar in fully mechanized sublevel caving face
In order to increase the coal recovery rate,the small coal pillar technology is often applied in the panel roadway layout with a top coal caving face.Because the pillar size is narrow,there is one heavier mining effect on it,and the tail entry distorts heavily.So the key problem is if the coal pillar is stable.The pillar width is one important factor of stability.In this paper based on theoretical analysis and in situ monitoring,by using the roof structure model analysis above the coal pillar,the side and advanced abutment stress distribution feature is studied.Then the failure law of coal pillar is analyzed and the scope where the pillar can be stable is calculated.Therefore the relationship between pillar width and factors is built up.The principles of rational pillar width are also provided.After filed application the method and principle of determining pillar width is proved effective,the coal pillar is stable,and the technological and economic result is gained.
Fully mechanized sublevel caving method Stability of small coal pillar Small coal pillar width In situ monitoring
Zang Chuanwei Wu Shiliang
Key labotary of Mine disater prevention and control,Shandong University of Science and Technology Qingdao,266510,China
国际会议
The 2007 International Conference on Mine Hazards Prevention and Control(2007矿山灾害预防与控制国际学术会议)
青岛
英文
231-236
2007-10-17（万方平台首次上网日期，不代表论文的发表时间）