摘要
分析了巷道围岩的弹塑性应力场,得出了等效应力变化曲线,说明巷道的开挖在围岩中产生了峰值应力,求出了支撑压力区的应力分布状态[1];分析了岩石分区碎裂化现象的形成机理,说明了支撑压力区的劈裂破坏是岩石分区碎裂化现象产生的必要条件;将支撑压力区的应力情况采用对径压缩公式进行调整推导出岩石分区碎裂化发生的条件公式,得出岩石分区碎裂化现象的出现不仅与深度有关而且也取决于岩石的力学参数。
Elasto-plastic stress field around underground structures was analyzed, and the equivalent stress curve was obtained. It was indicated that the peak stress intensity existed around underground structures. The support pressure distribution was obtained and the mechanism Of zonal disintegration of rock was analyzed. Splitting failure in the support pressure zone was the necessary condition for zonal disintegration formation. The stress disintegration in the support pressure zone was adjusted by diametrical compression formula. It was shown that the zonal disintegration of rock was related not only to the depth but also to the mechanical parameters of rocks.
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2006年第9期1124-1128,共5页
Chinese Journal of Geotechnical Engineering
基金
国家自然科学基金重大资助项目(50490275)
关键词
岩石分区碎裂化
对径压缩
支撑压力
等效应力变化曲线
zonal disintegration of rocks
diametrical compression
support pressure
equivalent stress curve
