深部岩石巷道爆破卸荷的破裂范围研究  

Study on Cracking Area of Deep Rock Tunnel under Blasting Unloading

作　　者：刘伟[1,2] 张伟[1,3] 陈士海[1,2] 

机构地区：[1]山东科技大学土木建筑学院,山东青岛266590 [2]山东科技大学山东省土木工程防灾减灾重点实验室,山东青岛266590 [3]山东交通学院土木工程学院,山东济南250023

出　　处：《山东科技大学学报（自然科学版）》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)

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.

关 键 词：深部巷道 破裂 岩石 爆破 瞬态应力场 

分 类 号：TD313[矿业工程—矿井建设]