| Combining with the research on the high engineering slopes in a typical research area, the stable problems of high rock engineering slope have comprehensively and systematically studied in this dissertation from 3 major domains, namely foundation of engineering geology, analysis and evaluation of the stability and stability control. All aspects about the research on high slope stability in rock engineering are involved in different level in this dissertation. A set of technical and methodological system on stability research of high slope in rock engineering was perfectly established by use of advanced theory and method in modern geologic engineering, geotechnical engineering, rockmass mechanics, modern mathematics and non-linear science.The r esearch r esults h ave n ot o nly s olved t he p ractical e ngineering p roblems b ut a Iso made great progress in elementary theories and methods about the research on high slope in rock engineering, mainly include:1. Through site investigation and parallel study on a great deal of typical examples in home and abroad, the general laws on epigenetic and superficial reconstruction of rock mass are systematically summarized, including its influence on bank slope stress field's magnitude, orientation and scope, the zoning rules of stress and structure field of bank slope, the unloading deformation-failure system in epigenetic and superficial reconstruction and its controlling effect on rock mass stability. All of those enrich and develop the theory on epigenetic and superficial reconstruction of rock mass.2. Thoroughly discussed the relationship between the epigenetic and superficial reconstruction of rock masses and the deformation-failure of slopes. According to the construction extend of rockmasses and discontinuities in the epigenetic-superficial and gravity process, the slope rock mass is divided into 4 grades, namely unloaded rockmass, unload-fracturing rockmass (include unload-cracking rockmass and unload-loosening rock mass), deforming rockmass, falling and sliding. For the first time, the basic character of the slope rock mass in different grades and its significance in engineering geology are provided in this dissertation.3. A method of fuzzy comprehensive assessment, which is used in the quality classification of slope stability, has been put forward, by combining the rockmass quality rating with the slope stability and applying fuzzy mathematics theory. In view of the deficiency of China slope mass rating (CSMR) method, a modified method of CSMR has been advanced, considering the practical features of rockmass structure of engineering slopes in the research area.4. By the way of geological analysis and computer simulation, it is concluded that thespandrel groove slopes and the intake slopes in the research region are stable on the whole and that the displacements of the slopes after excavation are often between 10-20 centimeters.5. Using the principle of level analysis and the theory of complex block, the researching trace and the technical route of block stability analysis about irregular slopes are built. It is revealed that the deterministic blocks in the spandrel groove slopes and the intake slopes are little and that most o f the n on-stable b locks i n the s lopes i s the s emi-deterministic b locks, which are in little size, in finite effect depth and in incomplete boundary.6. The concept on stability control of engineering slopes is brought forward for the first time, expounding the basic academic views of the stability control and the constitution of the controlling system. By the way of geological analysis, empirical analogy and FEM calculation, the optimized slope ratios of the spandrel groove and intake slopes are obtained, at the same time, the technical route and integrated ways applied to the choice of engineering slope ratio are established. The technical scheme of stability controlling for the spandrel groove and intake slopes is put foreword from 3 aspects, namely, slope surface control, anchoring control and...
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