摘要
为研究多硬性结构面切割下围岩体的爆破振动特性,依托托巴电站地下厂房,开展多硬性结构面切割围岩体的爆破振动特性现场试验研究。首先,分析托巴地下厂房硬性结构面的岩体特征与现场施工情况;然后,基于工程现场条件,设计地下厂房爆破振动试验方案,开展爆破振动现场监测试验研究。研究表明,多硬性结构面切割围岩体中峰值振速衰减规律受到比例距离(爆心距与炸药量的立方根之比)和结构面倾角的共同影响,呈现显著的非线性关系;同时,重点针对结构面倾角对围岩体爆破振动特性的影响,研究考虑比例距离和单结构面不同倾角下的围岩质点爆破振动规律,并提出相应的计算公式;在此基础上,基于围岩爆破安全振速理论,研究地下厂房多硬性结构面切割围岩体的爆破安全距离,并将研究成果进行工程应用实践。
To study the blasting vibration characteristics of surrounding rock mass cut by multi-hard structural planes,a field test study was carried out based on the underground powerhouse of Tuoba Power Station.Firstly,the characteristics of rock with hard structural planes and the site construction conditions were analyzed.Then,based on the engineering site conditions,a blasting vibration test program was designed for the underground powerhouse and a blasting vibration field monitoring test was carried out.The study shows that the attenuation law of peak vibration velocity in surrounding rock cut by multi-hard structural planes is jointly affected by the proportional distance(the cube root of the blast core distance to the explosive quantity)and the structural plane dip angle.A significant nonlinear relationship is showed among them.Also,the influence of structural plane dip angle on the blasting vibration characteristics was focused on.The blasting vibration law of the surrounding rock mass about different dip angles of single structural plane and the proportional distance was studied.Thus,the corresponding calculation formula was proposed.With these results,based on the theory of safe vibration velocity,the safe distance of the surrounding rock cut by multi-hard structural planes in the underground powerhouse was studied.Finally,the study results were practiced for engineering application.
作者
尹清华
杨凡杰
周辉
刘金山
张传庆
刘鹏程
汪学清
YIN Qinghua;YANG Fanjie;ZHOU Hui;LIU Jinshan;ZHANG Chuanqing;LIU Pengcheng;WANG Xueqing(School of Mechanics and Civil Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China;State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan,Hubei 430071,China;Huaneng Lancang River Hydropower Inc.,Kunming,Yunnan 650214,China;PowerChina Zhongnan Engineering Corporation Limited,Changsha,Hunan 410014,China;State Key Laboratory of Exploitation and Utilization of Deep Sea Mineral Resources,Changsha,Hunan 410012,China)
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2023年第12期3056-3069,共14页
Chinese Journal of Rock Mechanics and Engineering
基金
国家自然科学基金青年基金项目(52009128)
武汉市知识创新专项–基础研究项目(2022010801010160)
华能集团总部科技项目(HNKJ20–H22)。
关键词
水利工程
地下厂房
多硬性结构面围岩体
爆破振动特性
现场监测
安全距离
hydraulic engineering
underground powerhouse
multi-hard structural planes cut surrounding rock mass
blasting vibration characteristics
field monitoring
safe distance
