摘要
本文以零位破坏深度的现场观测为前提,根据工作面底板极限承载平衡与破坏理论,导出计算其最大破坏深度的理论公式。
Some essential data on active conditions of max. depth of face floor zero position failure zone are obtained by means of rock mechanics during the period of field investigation, and relevant empirical formulae are got by the data and statistic method over past few years. Author adopts plastic slip line field theory to research criteria of face floor zero position failure, main influence parameters and their selection, and to analyses them. Results include mining supporting force of roof dead weight stress field is an essential prerequisite causing floor failure; plastic failure width L of pillar is an essential condition of control floor max. failure depth; inner friction angle of floor rock mass is an essential element influencing failure, which angle is main index reflecting mechanical strength of rock mass.
出处
《煤炭科学技术》
CAS
北大核心
1992年第2期2-6,共5页
Coal Science and Technology
