摘要
采用区域划分的方法来描述爆炸作用下岩石介质的变形。以库仑定律作为强度破坏准则,破碎区边界上的弹性介质和它内部的塑性介质的破坏条件分别采用了不同的主应力函数。应用爆炸腔室近区的修正了的速度场关系式,研究了爆炸腔室与各个变形区的发展,并结合松散介质力学着重分析了破碎区边界参数与岩石介质特征参数的变化关系,求解了破碎区域内的径向应力。根据各个变形区边界条件,利用裂缝增长的能量准则,并结合准静力情况获得破碎区尺寸参数的两组近似计算公式,并对计算结果作了比较,与目前的研究相符合。
Deformation was described by zonal approach during explosion in rock. Different functions for principal stress were used as elastic medium failure conditions at the boundary with the crushing zone and plasticity within the latter based on Coulomb rule. Applied a new and revised velocity field near the explosion cavity and porous mechanics, the cavity and each deformation zones were studied. The relation between boundary parameters of crushing zone and characteristic parameters of rock was emphasized, and the radial stress in crushing zone is deduced. Based on the relation boundary conditions of each deformation zone, two calculation methods for the size of crusMng zone have been obtained with energy ride of cracks＇development or quasi-static statement. The results are all good enough to accord with the previous studies while compared with them.
出处
《爆破》
CSCD
2005年第3期5-8,共4页
Blasting
基金
国家自然科学基金(50490272)
关键词
岩石
爆炸
库仑定律
破碎区
rock
explosion
Conlomb rule
crushing zone
