采矿与安全工程学报Issue(2)：175-181,7.DOI:10.13545/j.cnki.jmse.2015.02.001
浅埋薄基岩高强度开采工作面初次来压基本顶结构稳定性研究
Stability of main roof structure during the first weighting in shallow high-intensity mining face with thin bedrock
摘要
Abstract
For achieving better surrounding rock control in shallow working face, the mechanism of abnormal overlying strata behavior such as large-scale shear-caving along the rib is analyzed in this pa-per. The scale between the height and the length of key block increases because of the increase of the overburden load, mining height and the length of working face. Limit position of rotary instability is obtained according to the principle of minimum potential energy. The slope of horizontal extrusion pressure curve decreases while the slope of the height of articulated surface increases in the turning process of the key block because of increasing of the scale between the height and the length, and the allowing rotation angle before the hinged structure turning to the limit equilibrium position also in-creases, which is not likely to cause rotary instability of the hinged structure. However, sliding instabil-ity is apt to occur. According to the specific instability form of shallow high-intensity mining face, dy-namic method for the determining of the supporting resistance is put forward, then first weighting of 31402 working face in Wulanmulun Mine is analyzed.关键词
浅埋工作面/基本顶/破断岩块/高长比/回转失稳/滑落失稳Key words
shallow working face/main roof/broken block/the scale between the height and the length/rotary instability/sliding instability分类
矿业与冶金引用本文复制引用
王家臣,王兆会..浅埋薄基岩高强度开采工作面初次来压基本顶结构稳定性研究[J].采矿与安全工程学报,2015,(2):175-181,7.基金项目
国家重点基础研究发展计划(973)项目(2013CB227903) （973）
