摘要
采用弹性动力学方法,利用拉普拉斯变换和卷积定理求解岩石巷道爆破卸荷瞬态应力场,结合Hopkinson动态破裂理论,给出了深部岩石巷道爆破卸荷破裂情况和瞬态卸荷破裂范围,说明了动态卸载扰动更易诱发岩爆灾害。算例表明,该理论和方法能正确地反应深部巷道开挖引起的围岩体的动态过程,并能有效地评价开挖卸荷引起的围岩体的破坏形态。
Elastic dynamics, Laplace transform and convolution theorem used to solve the transient stress field of blasting unloading around the rock tunnel. Combined with Hopkinson dynamic rupture theory, the cracking situation and the cracking area of the blasting transient unloading of the deep rock tunnel were given, and the result that the dynamic unloading disturbance brings about the rock burst disaster more easily was explained. The example shows that the theory and method can correctly reflect the dynamic process caused by excavation and effectively estimate the destruction form of the rock mass induced by excavating unloading.
出处
《山东科技大学学报（自然科学版）》
CAS
2013年第2期66-70,共5页
Journal of Shandong University of Science and Technology(Natural Science)
基金
高等学校博士学科点专项科研基金项目(20113718110002)
关键词
深部巷道
破裂
岩石
爆破
瞬态应力场
deep tunnel
cracking
rock
blasting
transient stress field
