摘要
应用Hoek-Brown强度理论对Lippmann煤层平动突出模型进行了改进,综合考虑了强度、结构等因素对煤层平动突出的影响,研究了水平煤层从巷道两帮突出前临界状态下的应力分布规律.赵各庄矿的实例研究表明,改进后的Lippmann煤层平动突出模型适用于顶底板为岩石的煤巷或半煤岩巷煤层整体冲击的机理分析,为合理确定煤层突出范围度量指标以及煤层整体平动突出倾向性的判定提供了理论依据.
Developed a new translatory model of coal bumps by adopting Hoek-Brown failure criterion instead of Mohr-Coulomb failure criterion initially proposed by Lippmann H in 1989. The improved Lippmann＇ s translatory model, in which rock mass characteristics and discontinuities were taken into account, could provide better understanding of mechanics of the coalmine bumps and could be used to analyze the pre-critical or critical state of stress preceding the initiation of coal bumps into excavation in coal seams. The length of critical state of stress region is obtained which can be taken as the proneness index of coal seams. The material properties of the coal seams from the Zhaogezhuang coal mine are also used to prove the validity of the improved Lippmann＇ s translatory model.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2007年第4期353-357,共5页
Journal of China Coal Society
基金
国家自然科学基金重大资助项目(50490272)
国家重点基础研究发展规划(973)资助项目(2006CB202203
2002CB412705)
国家自然科学基金资助项目(10572147)
国家科技支撑计划课题资助项目(2006BAK03B06)
北京市教育委员会共建项目建设计划资助项目
北京市教育委员会共建经费研究生教育资助项目
