( 2 ) the rock mass quality was assessed based on the data obtained from exploration adits with the methods of engineering geological classification for surrounding rock mass , bq , rmr and q - system successively . and th en the correlations between the assessment results of different methods were discussed 基于勘探平硐获取的资料，运用“围岩工程地质分类法” 、 bq法、 rmr法和q系统法进行了地下厂区岩体质量评价；讨论了四种不同方法评价结果之间的相关性。
Therefore , it is very important to study the rock mass quality classification and properly assess the surrounding rock mass stability of a large span and high side wall underground powerhouse . it not only determines the success of the project , but effects the investment and time limit 因此，围岩岩体质量及其稳定性评价对于这种修建在复杂岩体中的高边墙、大跨度地下洞室群来说至关重要，不仅决定地下工程的成功修建，而且决定着工程的安全性和经济合理性。
This manner of change reflected the great influence of texture to rock mass quality . rock mass mechanical parameters corresponding to individual rock mass quality at different levels are determined by means of correlation analysis and statistical analysis . results show that calculation outcomes match well with measured mechanical parameters 研究结果表明：对于混凝土重力坝，按照现在的深开挖方案，坝肩开挖后，土石方开挖量高达820x10 ‘ m ‘ ，且在72dri高程至坡顶将产生大范围的破坏区，采用工程治理将带来巨额的费用。
( 4 ) the influences of cavern shape , cavern scale and geostress on excavation effects for single cavern and the influences of distance between different caverns , rock mass quality and construction order etc on the excavation effects of caverns were studied . the features of multi - cavern effect of laxiwa underground project were studied 分析了洞室形状、洞室规模、地应力因素对单个洞室开挖效应的影响：分析了洞室间距、岩体质量、开挖顺序等因素对复式洞室开挖效应的影响；讨论了拉西瓦地下洞室群群洞效应的具体规律。
And that , the variable regulations of stress filed , deformation field and plastic failure zones in the surrounding rock mass of the underground cavities are summarized . based on the analysis of the effects of rock mass qualities on surrounding rock mass stability , the control effect of rock mass qualities about stability of surrounding rock mass was studied 总结了地下洞室群围岩应力、变形和破坏区的分布特征和变化规律，并通过对比分析围岩质量对其稳定性的影响，阐明了岩体质量对围岩稳定性的控制作用，为洞室群稳定性评价和工程设计施工提供了基础资料和理论依据。
( 2 ) statistical character and engineering control effect of short and intermittent structural plane ( iiia and iiib level ) of dam abutment has been systemically studied . and this kind of structural plane took important effect to appraise whether latent discrete boundary of massif could be formed and rock mass quality ( 2 )系统研究了坝肩短小、断续性结构面(分类中的_ a类和_ b )的统计特征及其工程控制效应，阐明了此类结构面对能否构成坝肩岩体块体的潜在分离边界以及对岩体质量的评价起着重要作用。
To improve the level of engineering harness , the author redefines the evaluation of rock slope crushing level ( rock mass quality ) , and divides the evaluation into two parts . one is the designation of surficial rock mass quality evaluation , which provides references for surficial harness of rock slopes . the other is the designation of integral stability rock mass quality evaluation , which provides references for the integral stability reinforcement 立足于工程治理，作者将岩质边坡的破碎程度(岩体质量)评价分为两部分，一是为岩质边坡表面防护治理提供依据的“岩质边坡表面岩体质量评价指标” ，简称为“表面rqd指标” ；二是为岩质边坡整体稳定性工程加固处治提供依据的“岩质边坡整体稳定性岩体质量评价指标” ，简称为“整体rqd指标” 。
( 5 ) selecting rock mass quality , excavation effect , multi - cavern effect and induced hazard effect as indexes , the stability classification scheme of rock mass surrounding large scale underground caverns was established . at last the stability of the surrounding rock mass of the main chamber of laxiwa project was evaluated with this scheme 选取岩体质量、开挖效应、群洞效应以及次生灾害效应作为指标，建立了“大型地下洞室群围岩稳定性分类”方案；运用该方案对拉西瓦水电站主厂房洞室进行了稳定性评价。
Basing on the abundant statistic and testing data of xiluodu hydroelectric project , the spatial characters of rock mass structure and quality in dam foundation are detailed studied . some progress is made in the following aspects : quantification of rock mass structure indexes , quantized quality classification of dam foundation rock mass , establishment of spatial database of rock mass quality indices and the diagrammatic representation of rock mass quality 本文结合溪洛渡水电工程，以丰富的统计、测试资料为基础，以岩体结构为主线，深入研究了坝基岩体结构、岩体质量的空间变化特征，在岩体结构分类指标定量化、坝基岩体质量量化分级及岩体质量指标空间数据库的建立、岩体质量图形展示技术方面取得了一定的进展。
Drawing lessons from internal and external successful experiences in rock mass quality classification , the scheme of quantized quality classification of dam foundation rock mass is put forward choosing quantization indices of rock mass structure as primary factors , and the consistency of single index and combined index on determine rock mass quality grade is also verified by measured data 借鉴国内外岩体质量分类的成功经验，以岩体结构作为分级(分类)的基础，选择岩体结构量化指标作为岩体质量量化分级的主要因素，提出了坝基岩体质量量化分级方案。
