Research on Stability and Support of Roof with Larger Section and Thin Bedrock above Shallow Coal Seam
The numerical simulations being used, the stress and deformation characteristics of roof with larger section and thin bedrock above the shallow coal seam were analyzed, and the effects of bolt support and bolt anchor joint support were compared. The results show that for roadway with larger section and thin bedrock above the shallow coal seam, the bolt support often makes the rocks above roadway work as a composite beam, so it can well improve the resistance of bending and tensile of the rock, prevent the roof damage, but it cant prevent the roof settlement as a whole. But the bolt anchor joint support can reduce stress in the rock and control roof settlement well. Studies also show that the preload of anchor affects the support effect greatly. All results got in this article can provide a good reference for supporting methods in similar projects.
Shallow depth Thin bedrock Large section roadway Stability control Bolt anchor joint support Numerical analysis
MA Zhitao ANG Tongxu LI Xiaoping
Key Laboratory of Mine Disaster Prevention and Control, Shandong University of Science and Technolog Dongtan Mining, Yanzhou Coal Mining Co., Ltd. Jining 273500, China
国际会议
2010 International Conference on Mine Hazards Prevention and Control(第二届矿山灾害预防与控制国际学术会议 ICMHPC)
青岛
英文
98-102
2010-10-15（万方平台首次上网日期，不代表论文的发表时间）