爆破对预留岩体力学特性影响的试验研究

Experimental Study of Influence of Blasting on Mechanical Properties of Retaining Rock

研究了爆炸冲击载荷对围岩或预留岩体力学特性的影响 ,采用实验室模型实验取芯检测方法 ,对爆破损伤岩体进行了抗压强度检测以及超声波检测 ,研究了爆炸冲积载荷对预留岩体的不同位置所造成的损伤程度 ,提出了计算损伤程度的具体方法。

The influence of blasting impact load on the mechanical properties of wall rock or retaining rock are studied. A laboratory mold using drill sampling method is used to study the damage extension of different positions in retaining rock by blasting. Through the test of compressive strength and ultrasonic examination of the damaged rock, the damage extension in the retaining rock can be calculated to predict the situation in the retaining rock after blasting. A calculating method is presented to calculate the damage extension of the retaining rock.