地质与勘探2018，Vol.54Issue(1)：158-165,8.
勘察阶段洞室围岩质量预测的问题探讨
Research on Prediction of Wall-Rock Quality for Underground Caverns during Geotechnical Surveys
摘要
Abstract
Assessment of wall rock quality is important to the design and construction of underground caverns. All codes for geotechnical surveys have definite rules for the wall-rock quality assessment. The methods to evaluate wall mass quality have a large number,but their prediction results tend to be much different from real situations in a survey stage. The reason is that such assessment needs many accurate data,but the direct data of surrounding rock is usually limited in the survey stage. Most data are indirect data (from geophysical surveys) and inferred data (based on surface geotechnical mapping and drilling) data. Thus, it is impossible to well assess wall rock solely relying on a single data set. This paper presents an improvement to this aspect based on analysis of multiple data. Using data from surveys,the relationship between the drill core quality and the logging data is established. Then we examine how the quality of wall rock relates to each geophysical parameter. Finally,comparing geophysical profiles and drill data permits to help predict the features of wall rock. As an example,we compare curves of BQ,RQD,log and an electromagnetic profile of a drill hole in granite and known wall rock quality. We find that the geophysical anomalies correspond roughly to the quality of the wall rock quality. It means that comprehensive analysis of ge-ologic,geophysical and drilling data can help improve the prediction of wall-rock quality during geotechnical survey.关键词
勘察/洞室/围岩质量/预测Key words
geotechnical survey/cavern/wall rock quality/prediction分类
天文与地球科学引用本文复制引用
袁广祥,李建勇,董金玉,黄志全,万军利,王安明..勘察阶段洞室围岩质量预测的问题探讨[J].地质与勘探,2018,54(1):158-165,8.基金项目
国家自然科学基金项目(编号:41402269)、河南省科技创新人才计划(编号:154100510006)、河南省重点科技攻关项目(编号:152102210111)、河南省高等学校青年骨干教师资助计划(编号:2015GGJS-105)和华北水利水电大学青年科技创新人才项目联合资助. （编号:41402269）
