摘要
针对地下工程岩体压碎和塑性变化两种损伤形式,本文以莫尔-库伦准则为岩体在爆破荷载作用下的破坏条件,提出了冲击波作用下岩体压碎圈范围的计算式,运用Von Mises屈服条件,计算了应力波作用下岩体塑性区范围。以KUBELA420炸药为例,估算了重庆主城区常见砂岩在爆破过程中形成的压碎圈范围不超过1.7倍装药半径,应力波作用下岩体塑性区范围不超过25.06倍装药半径,其与数值模拟预测的结果较接近。
This paper deals with the two damage forms：rock mass crushing and plastic changes in underground engineering.It is based on Mohr-Coulomb criterion.The radii of crushed circle under the action of shock wave is obtained.It applies Von Mises yielding criterion to calculate the rock plastic zone under stress wave.It uses the KUBELA 420 explosive as an example.For sandstone in Chongqing under blasting load,the radii of crushed circle is not more than 1.7 times of charging radius and plastic zone radius does not exceed 25.06 times of charging radius.The prediction is close to the numerical simulation results.
出处
《工程地质学报》
CSCD
北大核心
2014年第2期233-237,共5页
Journal of Engineering Geology
基金
国家自然科学基金(11272185)
重庆市国土科技项目(cqgt120301)资助
关键词
爆炸力学
应力波
压碎圈
塑性区
数值模拟
Mechanics of explosion
Stress wave
Crushed circle
Plastic zone
Numerical simulation
