爆炸应力波在层状节理岩体中传播规律及数值模拟  

Blasting Stress Wave in Layered Jointed Rock Mass:Propagation Law and Numerical Simulation

作　　者：李鹏[1,2] 周佳[1,2] 李振 LI Peng;ZHOU Jia;LI Zhen(School of Civil Engineering and Archi Qingdao 266590, China;Shandong Prevention and Control, Shandong Univers tecture, Shandong University Provincial Key Laboratory of of Science and Technology, Civil Engineering Disaster ity of Science and Technology, Qingdao 266590, China)

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

出　　处：《长江科学院院报》2018年第5期97-102,共6页Journal of Changjiang River Scientific Research Institute

基　　金：国家自然科学基金项目(51174128);教育部新世纪优秀人才支持计划项目(NCET-07-0519);山东科技大学研究生科技创新基金资助项目(YC140322)

摘　　要：为了得到爆炸应力波在层状节理裂隙岩体中的传播与能量衰减规律,以便更好地研究围岩结构动力稳定性,以凤凰山铁矿为研究背景,建立了2种巷道模型:一种在巷道上方预设2个平行的水平节理,另一种不含节理。通过进行相似理论与试验研究和FLAC^(3D)数值模拟软件的非线性动力反应对比分析,在输入爆破荷载后,分析在不同时刻和位置时,完整岩体的地质力学模型和节理岩体的地质力学模型的爆炸应力波质点速度。结果表明:爆炸应力波在节理岩体中的衰减比在完整岩体中的衰减快;在同一质点处,各方向上的衰减各不相同,并且2种方法的结果几乎相同。研究成果为爆破应力波规律的把握和对巷道进行支护提供了重要的理论依据。In an attempt to better research the dynamic stability of surrounding rock structure,the rules of propagation and energy attenuation of blasting stress wave in layered jointed rock mass were obtained. With Fenghuangshan iron ore as a research background,geomechanics models of roadway were established in line with the similarity principle： one jointed rock mass with 2 parallel horizontal joints on top of roadway,and one intact rock mass containing no joint. With the vibration waveform curve as the input frequency of vibration load,the particle velocities of blasting stress wave at different instances and positions of jointed rock mass model and those of intact rock mass model were compared between model test and FLAC^3D numerical simulation. Model test results are in good agreement with computation results： the attenuation of blasting stress wave in jointed rock mass is faster than that in intact rock mass; at the same particle position,the attenuation varies in different directions. The present research serves as an important theoretical basis for obtaining blasting stress wave law and roadway support.

关 键 词：爆炸应力波 节理裂隙 衰减规律 爆破荷载 FLAC^3D 数值模拟 

分 类 号：TD235[矿业工程—矿井建设]