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动力影响下山区露天矿合理边坡角的确定 被引量:7

DETERMINATION OF RATIONAL SLOPE ANGLE CONSIDERING INFLUENCE OF BLASTING VIBRATION ON OPEN-PIT MINE IN MOUNTAINOUS AREAS
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摘要 针对山区露天开挖和岩石边坡工程实际,根据极限平衡理论和模糊数学理论,建立了相应的理论分析模型。考虑矿山生产爆破振动动力因素作用和影响,利用所建立的数学模型对某大型金属露天矿山边坡稳定性进行了具体计算分析,并依此对矿山边坡总体边坡角进行了评价。将理论计算分析结果与露天矿山工程实际情况进行了对比,表明所采用的理论模型和计算分析方法符合矿山工程实际。 The landslip of rock slope with the influence of blasting vibration often results in serious disasters, frequently with heavy losses of life and damage to property. It is generally difficult to precisely analyze rock slope stability due to the vast number of unknown variables, such as slope type, height and angle of slope, physical properties of rock mass, and so on. The prediction of failure of rock slope is an important problem of rock mechanics in the engineering excavation activities, especially the open-pit mine in mountainous areas. It is difficult to determine the rational slope angle of rock slope because of the complexity of the problem. Recently, fuzzy theory has been applied to predict the landslip and failure of rock slope. The landslip of rock slope can be regarded as a fuzzy event. The landslip will take place at a fuzzy probability, and so the theory of fuzzy measures can be applied to predict the landslip and failure of rock slope. By using statistical analysis, the initial damage of the rock slope in mountainous areas is found to be of normal distribution. Based on the results of statistical analysis of a large amount of measured data in slope engineering, the fundamental fuzzy model of failure of rock slope is established by using the theory of fuzzy mathematics. The formulas of two-dimensional problems are derived and applied to the prediction of slope failure due to surface mining. The fuzzy measure models are adopted for determination of rational slope angle considering the influence of the blasting vibration on open-pit mine in mountainous areas. The fuzzy failure probability and dynamic responses of the rock slope are calculated. Numerical results are compared with those obtained from independent field tests. The agreement of the theoretical results with the field measurement shows that the presented model is satisfactory and the formulas obtained are valid, and thus can be effectively used for prediction of slope failure and determination of the rational slope angle of rock slope.
出处 《岩石力学与工程学报》 EI CAS CSCD 北大核心 2004年第17期2949-2953,共5页 Chinese Journal of Rock Mechanics and Engineering
基金 中国科学院武汉岩土力学所岩土力学重点实验室基金(Z110406)
关键词 岩石力学 边坡稳定性 爆破振动 模糊数学 边坡角 Blasting Fuzzy sets Mathematical models Rock mechanics Statistical methods Vibrations (mechanical)
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