大断面深埋隧道揭露高瓦斯煤层的安全岩柱预留厚度
及影响因素研究

金属矿山 ›› 2025, Vol. 54 ›› Issue (6): 204-211.

大断面深埋隧道揭露高瓦斯煤层的安全岩柱预留厚度及影响因素研究

时　松¹吴　华²　周　健³　邸　成²　侯　俊²　姜　潇²　王小岐⁴ 　郄建慧⁴　江明锋⁴ 王剑宏⁴ 　刘长武¹

1. 四川大学水利水电学院,四川成都 610065;2. 中铁二院工程集团有限责任公司,四川成都 610031; 3. 中国中铁隧道局集团有限公司,广东广州 511458;4. 京昆高速铁路西昆有限公司,重庆 400020

出版日期:2025-06-15 发布日期:2025-07-09
通讯作者: 刘长武(1963—),男,教授,博士,博士研究生导师。
作者简介:时　松(1996—),男,博士研究生。
基金资助:
云南省重点研发计划项目(编号:202303AA080004)。

Study on the Reserved Thickness of Safe Rock Pillar and Its Influencing Factors in High Gas Coal Seam Exposed by Large Section Deep Buried Tunnel

SHI Song ¹ 　 WU Hua ²　 ZHOU Jian ³　 DI Cheng ²　 HOU Jun ²　 JIANG Xiao ² 　 WANG Xiaoqi⁴XI Jianhui ⁴ 　 JIANG Mingfeng ⁴ 　 WANG Jianhong⁴ 　 LIU Changwu ¹

1. College of Water Resource & Hydropower,Sichuan University,Chengdu 610065,China;2. China Railway Eryuan Engineering Group Co. ,Ltd. ,Chengdu 610031,China;3. China Railway Tunnel Group Co. ,Ltd. ,Guangzhou 511458,China; 4. Beijing Kunming High Speed Railway Xikun Co. ,Ltd. ,Chongqing 400020,China

Online:2025-06-15 Published:2025-07-09

摘要/Abstract

摘要： 隧道及相关地下工程的建设越来越多地面临深埋、高地应力、复杂地质条件等情况,其中煤与瓦斯突出是隧道在煤系地层中掘进会遇到的难题。预留合适厚度的安全煤柱以便于综合消突对于隧道设计和施工是至关重要的。以昭通隧道作为工程背景,针对深埋、高地应力和超大断面的特点,基于尖点突变理论和止浆岩盘改进法分析了预留安全岩柱的影响因素;并运用数值模拟方法,分析了隧道等效高度、弹性模量、垂直地应力和瓦斯压力对临界岩柱厚度的影响。结果表明:瓦斯压力、隧道开挖等效高度和垂直地应力越大,所需预留安全岩柱厚度越大;弹性模量对安全岩柱厚度的影响较小,且呈现波动现象;在准确计算安全岩柱厚度方面,止浆岩盘改进法表现更好,与数值模拟结果更接近。根据研究结果,结合现场地质及施工情况,最终选择 10 m 作为昭通隧道预留安全岩柱厚度,顺利完成瓦斯抽采工作,并成功穿越突出煤层。

关键词: 深埋隧道　突出煤层　安全岩柱　尖点突变理论　止浆岩盘改进法

Abstract: The construction of tunnels and related underground projects is increasingly faced with deep burial, high ground stress,complex geological conditions,etc. Among them,coal and gas outburst is a difficult problem that tunnels will encounter in coal measures strata. It is very important for tunnel design and construction to reserve safe coal pillars with appropriate thickness to facilitate comprehensive outburst elimination. Taking Zhaotong tunnel as the engineering background,aiming at the characteristics of deep burial,high ground stress and super large section,the influencing factors of reserved safety rock pillar are analyzed based on cusp catastrophe theory and slurry-stopping rock plate improvement method. The influence of tunnel equivalent height,elastic modulus,vertical ground stress and gas pressure on the critical rock pillar thickness is analyzed by numerical simulation method. The results show that the greater the gas pressure,the equivalent height of tunnel excavation and the vertical ground stress,the greater the thickness of the required reserved safety rock pillar. The elastic modulus has little effect on the thickness of the safety rock pillar and shows a fluctuation phenomenon. In terms of accurately calculating the thickness of the safety rock pillar,the improved method of the slurry-stopping rock plate performs better and is closer to the numerical simulation results. According to the research results,combined with the site geology and construction conditions,10 m was finally selected as the thickness of the reserved safe rock pillar in Zhaotong Tunnel,and the gas extraction work was successfully completed and the outburst coal seam was successfully crossed.

Key words: deep tunnel,outburst coal seam,safety rock pillar,cusp catastrophe theory,slurry-stopping rock plate improvement method

中图分类号:

TU921

时　松, 吴　华, 周　健, 邸　成, 　侯　俊, 　姜　潇, 王小岐, 　郄建慧, 江明锋, 王剑宏, 　刘长武. 大断面深埋隧道揭露高瓦斯煤层的安全岩柱预留厚度及影响因素研究 [J]. 金属矿山, 2025, 54(6): 204-211.

SHI Song , 　 WU Hua , ZHOU Jian , 　 DI Cheng , 　 HOU Jun , 　 JIANG Xiao, 　 WANG Xiaoqi, XI Jianhui , JIANG Mingfeng , WANG Jianhong , 　 LIU Changwu . Study on the Reserved Thickness of Safe Rock Pillar and Its Influencing Factors in High Gas Coal Seam Exposed by Large Section Deep Buried Tunnel [J]. Metal Mine, 2025, 54(6): 204-211.

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