巷道围岩间隔性区域断裂破坏的能量方法分析

Energy Analysis of Intermittent Zonal Fracture of Roadway Wallrock

通过真三轴试验证明了卸载可能会使岩石内产生拉应力;讨论了岩石间隔性区域断裂过程中能量转化与岩石破坏的内在机制。指出岩石间隔性区域断裂是岩石在能量耗散与能量转化下的综合结果。能量耗散使岩石产生损伤,并导致岩性劣化;能量转化则是引发岩石拉伸破坏的内在原因。推导了岩石间隔性区域断裂半径的计算公式。

That unloading may lead to the tensile stress in rock is demonstrated by true triaxial pressure experiment. The intrinsic mechanism of energy conversion and failure process in the intermittent regional fracture process of rock is discussed. It is pointed out that the rock intermittent regional fracture is a composite resuh of rock energy dissipation and conservation. Energy dissipation leads to rock damage and lithologic deterioration while energy conversion is the internal cause for rock tensile fracture. The analytical formula for the radius of intermittent zonal fracture process of rock is deduced.