基于岩体开挖卸荷效应的岩爆机理研究

汪洋; 尹健民; 李永松; 周春华; 艾凯

doi:10.3969/j.issn.1001-5485.2014.11.0242014,31(11):120-124

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长江科学院院报 ›› 2014, Vol. 31 ›› Issue (11) : 120-124. DOI: 10.3969/j.issn.1001-5485.2014.11.0242014,31(11):120-124

地下洞室围岩稳定

基于岩体开挖卸荷效应的岩爆机理研究

汪洋,尹健民,李永松,周春华,艾凯

作者信息 +

Mechanism of Rock Burst Caused by Excavation Unloading Effect

WANG Yang,YIN Jian-min,LI Yong-song, ZHOU Chun-hua,AI Kai

Author information +

文章历史 +

摘要

针对锦屏二级水电站深埋引水隧洞开挖卸荷引发的岩爆问题,通过数值模拟研究了洞壁围岩卸荷范围和卸荷程度对岩爆的影响效应。研究结果表明随着围岩卸荷范围和卸荷程度的增大,潜在的岩爆动力源区逐步向围岩深部转移,发生岩爆的可能性进一步减小。相比较而言,围岩的卸荷程度比围岩的卸荷范围对岩爆的影响效果更为显著。研究成果为深部地下工程岩爆防治提供了理论依据。

Abstract

In view of the rock bursts caused by excavation unloading in the deep diversion tunnel of JinpingⅡhydropower station, we carried out numerical simulation to research the effects of unloading range and unloading degree of surrounding rock on rock burst. Research indicates that the potential power source zone of rock burst gradually transfers to the deep and the probability of rock burst is further reduced when the unloading range and unloading degree increase. Moreover, the impact of unloading degree on rock burst is more significant than that of unloading range. The research provides theoretical foundation for preventing rock burst in deep underground projects.

导出引用

汪洋,尹健民,李永松,周春华,艾凯. 基于岩体开挖卸荷效应的岩爆机理研究[J]. 长江科学院院报. 2014, 31(11): 120-124 https://doi.org/10.3969/j.issn.1001-5485.2014.11.0242014,31(11):120-124

WANG Yang,YIN Jian-min,LI Yong-song, ZHOU Chun-hua,AI Kai. Mechanism of Rock Burst Caused by Excavation Unloading Effect[J]. Journal of Changjiang River Scientific Research Institute. 2014, 31(11): 120-124 https://doi.org/10.3969/j.issn.1001-5485.2014.11.0242014,31(11):120-124

中图分类号： TD313

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