摘要
以抚顺煤田为工程背景,通过采动微震和瓦斯的现场观测与分析,得到深部开采临界深度是采动岩体的动力响应由线性转为非线性深度的认识。提出用采动岩体的视本构关系、采动微震的分形几何学特征和在浅部未发生过的特殊动力现象定量判断采动岩体力学行为的方法。结果表明,上述3项指标均指示700 m左右的深度是该煤田采动岩体力学行为发生非线性动力响应的临界深度。
Took Fushun coalfield for the engineering background,it was found that the critical depth in deep exploitation was the mining-disturbed rock mass dynamic response from the linear to nonlinear through the on-site and analysis of micro fracture of rocks and gas.A method was proposed to judge quantitatively the mechanical behavior of the mining-disturbed rock mass with the apparent constitutive relation of rocks and the characteristics of micro fractal geometry of rocks brittle fracture,as well as special dynamic phenomenon that does not happen at shallow.The results show that from above three indexes,the depth of 700 m around is the critical depth that the nonlinear dynamic response happens for the mechanics behavior of the mining-disturbed rock mass in the coalfield.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2010年第3期363-367,共5页
Journal of China Coal Society
基金
国家高技术研究发展计划(863)基金资助项目(2008AA062104)
关键词
深部开采
非线性临界深度
定量判定方法
岩体动力响应
视本构关系
deep exploitation
nonlinear critical depth
methods of quantitative discrimination
rock mass dynamic response
apparent constitutive relation
作者简介
李铁（1961-），男，天津人，研究员，博士。E—mail：fslitie@yahoo．com．cn
