摘要
岩爆是深部岩石地下工程中常见的自然灾害,因此,必须对岩爆烈度进行预测。选择围岩最大切向应力与其单轴抗压强度的比值σθ/σc、岩石单轴抗压强度与单轴抗拉强度的比值σc/σt以及岩石弹性能量指数Wet作为岩爆烈度评价指标,基于王元汉岩爆烈度分级标准建立了岩爆烈度等效数值法预测模型。国内外12个岩石地下工程的岩爆预测表明,本文模型预测结果与实际岩爆烈度非常吻合,与其他预测模型相比,所建议的模型简单易行,便于实际工程采用。
The rock burst is a kind of common geological disaster in deep underground engineering and severely threatens the safety of workers and the equipments. Hence,it is necessary to predict the intensity of rock burst. The paper chose the ratio of the maximum rock tangential stress to the compressive rock strength σθ/ σc,the ratio of the compressive rock strength to the tensile rock strength σc/ σtand the elastic energy index as the criteria indexes of rock burst intensity,and established a forecast model of rock burst occurrence and its intensity of equivalent numerical method according to classification standard of rock burst intensity proposed by Wang Yuanhan. The model is tested by 12 cases of rock project at home and abroad. The results show that the prediction result of rock burst intensity line up perfectly with the practical records. Comparison with other predict models,the proposed model is very simple and convenient for practical use.
出处
《水资源与水工程学报》
2014年第1期210-213,共4页
Journal of Water Resources and Water Engineering
关键词
岩爆烈度
岩爆烈度预测
等效数值法
地下工程
rock burst intensity
prediction of rock burst intensity
equivalent numerical method
underground engineering
