化工矿产地质2019，Vol.41Issue(2)：124-128,5.
莆炎高速公路文笔山2#隧道岩爆综合预测研究
Comprehensive prediction of rock burst in wenpenshan No.2 tunnel of Puyan expressway
杨举1
作者信息
- 1. 中铁二院工程集团有限责任公司,四川 成都 610031
- 折叠
摘要
Abstract
Rock burst prediction has always been one of the worldwide difficult problems in underground engineering. Based on the rock mass characteristics and initial stress field of surrounding rock of Wenbishan No. 2 tunnel in Puyan Expressway, the physical and mechanical properties and integrity of surrounding rock are obtained by indoor rock mechanics test and on-site wave velocity test. The rock burst prediction of Wenbishan No. 2 tunnel in Puyan Expressway is taken as an example. The magnitude and direction of in-situ stress in the study area were measured by hydraulic fracturing method. The distribution of initial stress field of tunnel was fitted by linear regression function, and the distribution law of redistribution stress field of surrounding rock after excavation was calculated and analyzed by Kirsh generalized model. On this basis, combined with the criterion of rock burst at home and abroad, this paper makes a comprehensive prediction and analysis of the rock burst section, position and rock burst grade of Wenbishan No.2 Tunnel, which provides the basis for the establishment of construction excavation and supporting scheme.关键词
隧道工程/岩爆/地应力Key words
Tunneling engineering/Rock burst/In-situ stress分类
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杨举..莆炎高速公路文笔山2#隧道岩爆综合预测研究[J].化工矿产地质,2019,41(2):124-128,5.
