坠落式危岩崩落的激振效应与求解

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振动与冲击 ›› 2012, Vol. 31 ›› Issue (20) : 32-37.

论文

坠落式危岩崩落的激振效应与求解

唐红梅1,2 王智2 鲜学福1 陈洪凯1,2

作者信息 +

Contribution ratio of excitation action triggered by collopse of perilous rock to the stability of perilous rock

TANG Hong-mei1,2 WANG Zhi2 CHEN Hong-kai1,2 XIAN Xue-fu1

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文章历史 +

摘要

群发性危岩破坏机理必须考虑危岩体之间的相互作用，研究危岩体崩落瞬时产生的激振波对相邻危岩稳定性影响具有重要意义。本文针对坠落式危岩，建了考虑危岩崩落激振效应物理模型，分析了危岩崩落激振波以正入射危岩主控结构面的受力特征；运用断裂力学方法，考虑自重和裂隙水压力影响因素下,构建了考虑危岩崩落激振作用的主控结构面联合应力强度因子计算方法。通过工程实例分析表明，考虑危岩崩落激振效应后，在天然和暴雨两种工况下应力强度因子值都有明显增加趋势，崩落激振波以竖直平方传播比水平方向山体里传播影响要大得多。其研究成果对实施危岩防灾减灾提供了重要的科学依据。

Abstract

The mechanism failure must consider the interaction of perilous rock . Study on stability of perilous rock by excitation action triggered by collopse is an important question. In this paper, Focused on the falling perilous , a physica l model was established considering falling excitation action;Analyzed the dominant fissure’s mechanic characteristics under the vertically incidence of excitation waves;Based on the fracture mechanics, a method to calculate the combined stress intensity factors of dominant fissure under falling excitation action of perilous rock was established.As the instance results showed, two cites of nature and rainfall ,the stability coefficient are both reduce ,specially in the horizontal , stability coefficient reduced by about 10% respectively ,while in vertical about 2% . The results provided some scientific progresses disasters prevention and mitigation of perilous rock.

导出引用

唐红梅;王智鲜学福陈洪凯;. 坠落式危岩崩落的激振效应与求解[J]. 振动与冲击, 2012, 31(20): 32-37

TANG Hong-mei;WANG Zhi CHEN Hong-kai;XIAN Xue-fu. Contribution ratio of excitation action triggered by collopse of perilous rock to the stability of perilous rock[J]. Journal of Vibration and Shock, 2012, 31(20): 32-37