摘要
通过模拟忻州窑矿支承压力对大煤样的压裂实验，分析了顶煤的强度、变形特征，讨论了顶煤裂隙的６个演化过程，运用分形维数，给出了压裂与块度的线性规律，得出了顶煤压裂本构方程，为综放开采参数选择和数值分析提供了科学依据．
Through simulating fracture test that the abutment pressed the big coal sample, the strength and deformation characteristic of top coal was analysed, and the six evolution process of crack was discussed.The linear law of fracture and coal lump was given by crack fractal dimension.The characteristic equation of top coal fracture was obtained. Scientific basis is provided for select parameters and mathematical analysis on sub level caving method.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
1999年第1期29-33,共5页
Journal of China Coal Society
基金
国家自然科学基金
关键词
综放开采
顶煤
压裂
实验研究
采煤
sub level caving method,top coal,fracture,evolution
