【摘要】 采用模型试验方法 ,研究岩体结构面方位对预裂成缝的影响 ,特别是采用黑火药试验结构面在 30°的最不利极限角度下孔间裂缝贯通的情况。结果表明 ,低爆速的黑火药可得到小锯齿断裂。这为结构面预裂爆破效果的改善提供了新的有效途径和理论依据更多还原

【Abstract】 This paper uses model experiments to mainly analyze the effect on the pre shearing crack by the orientation of structural plane. Specially, using black powder to test the result of crack running through between two holes when the structure face is 30°the worst limited angle. The result indicates that using the low velocity black powder can get small zigzag repture. It can provide new ways and theory to improve the blasting effect of the pre splitting blasting of structure face.更多还原