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处于不同的地质环境下,玄武岩岩体结构具有不同的状态,在围压原位状态下,岩体结构面镶嵌紧密结合,岩体完整性好,岩体完整性系数与结构面最小间距具有不对应性,应选取完整性系数作为评价指标;而在岩体处于应力松弛状态下岩体完整性差,完整性系数评价指标和结构面间距评价指标具有很好对应性,应选取最小间距作为评价指标。本文通过对西南某水电站坝基岩体在处于不同的地质环境下岩体结构的评价,从而选取岩体完整性系数作为深部岩体结构评价的主要指标。
Under different geological conditions, the basalt rock structure has different states. Under the state of confining pressure, the rock mass facets are inlaid and intimately integrated, the integrity of the rock mass is good, and the rock mass integrity coefficient and the minimum spacing of the structure face are not Correspondence, the integrity coefficient should be selected as the evaluation index; rock mass integrity under stress relaxation is poor, and the evaluation index of integrity coefficient and structural plane spacing have good correspondence, and the minimum spacing should be chosen as the evaluation index . In this paper, by evaluating the rock mass structure of dam foundation rock mass of a certain hydropower station in different geological environment in Southwest China, the rock mass integrity coefficient is selected as the main index of deep rock mass structure evaluation.