富水断层破碎带隧道防突岩盘厚度计算与模型试验验证

doi:10.13722/j.cnki.jrme.2023.1156

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摘要针对现有富水断层破碎带力学模型及隧道防突岩盘厚度计算公式考虑因素不全、计算误差大等问题，基于Janssen理论，引入隧道轴线与断层破碎带面水平夹角、断层倾角及地下水埋深等参数，推导隧道穿越富水断层破碎带的防突岩盘厚度修正公式并进行模型试验验证，揭示破碎带分布范围、断层破碎带倾向倾角、水压等因素对隧道防突岩盘厚度的影响规律。结果表明：基于Janssen理论，引入隧道轴线与断层破碎带面水平夹角、断层倾角、地下水埋深等参数，推导出断层破碎带相对于防突岩盘内倾和外倾2种工况下的隧道防突岩盘厚度计算公式具有良好的适用性；隧道防突岩盘厚度随断层破碎带分布范围、水压、隧道断面及埋深的增大而增大，随断层破碎带倾角、普通围岩强度及隧道轴线和断层破碎带交角的增大而减小。研究成果可为类似隧道工程防突安全计算提供理论参考。

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	钟祖良1
	申卓1
	李亚朋1
	乔红彦2
	唐腾龙1

关键词 ：隧道工程, 富水断层破碎带, Janssen理论, 防突岩盘厚度, 影响因素

Abstract：There are issues with the present tunnel outburst preventive rock plate thickness calculation method and the water-rich fault fracture zone mechanical model，such as incomplete factors and significant calculation error. Based on Janssen?s theory，parameters such as the horizontal angle between the tunnel axis and the fault fracture zone surface，the fault dip angle and the groundwater depth are introduced. The correction calculation formula for the outburst prevention rock plate thickness of the tunnel crossing the water-rich fault fracture zone is derived and verified by model test. On this basis，the influences of fracture zone distribution，fault fracture zone dip angle，water pressure and other factors on the rock plate thickness of tunnel are revealed. The results show that the calculation formula of the outburst prevention rock plate thickness has good applicability under the two conditions including fault fracture zone is inward/outward compared with rock plate for outburst prevention. Meanwhile，the thickness of tunnel outburst prevention rock plate increases with the increase of fault fracture zone distribution，water pressure，tunnel section and buried depth，and decreases with the increase of fault fracture zone inclination，the strength of ordinary surrounding rock and the intersection Angle between tunnel axis and fault fracture zone. The research results can provide theoretical reference for the anti-outburst safety calculation of similar tunnel engineering.

Key words： tunneling engineering water-rich fault fracture zone Janssen?s theory thickness of outburst prevention rock plate influencing factors

引用本文:

钟祖良1，申卓1，李亚朋1，乔红彦2，唐腾龙1. 富水断层破碎带隧道防突岩盘厚度计算与模型试验验证[J]. 岩石力学与工程学报, 2024, 43(8): 1883-1892.
ZHONG Zuliang1，SHEN Zhuo1，LI Yapeng1，QIAO Hongyan2，TANG Tenglong1. Calculation and model test verification of outburst prevention rock plate of tunnels in water-rich fault fracture zones. , 2024, 43(8): 1883-1892.

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http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2023.1156 或 http://rockmech.whrsm.ac.cn/CN/Y2024/V43/I8/1883

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