煤矿深部巷道大变形分步联合控制研究  

Combined support method for large deformation of deep coal mine tunnel

作　　者：李培涛[1,2] 刘泉声 朱元广[3] 高峰[2] 范利丹 LI Pei-tao;LIU Quan-sheng;ZHU Yuan-guang;GAO Feng;FAN Li-dan(School of Civil Engineering,Henan Polytechnic University,Jiaozuo,Henan 454003,China;School of Civil Engineering,Wuhan University,Wuhan,Hubei 430072,China;State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan,Hubei 430071,China)

机构地区：[1]河南理工大学土木工程学院,河南焦作454003 [2]武汉大学土木建筑工程学院,湖北武汉430072 [3]中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室,湖北武汉430071

出　　处：《岩土力学》2025年第2期591-612,共22页Rock and Soil Mechanics

基　　金：国家自然科学基金(No.U21A20153,No.52208244)。

摘　　要：深部巷道大变形已成为深部煤炭安全高效开采的关键制约因素。为实现深部软弱围岩稳定性控制,提出了基于深部巷道大变形演化过程的分步联合支护方案及其理论分析模型。结果表明,深部软弱围岩呈破裂碎胀变形-损伤扩容变形-连续变形的分布特征。分步联合支护后,围岩极限承载力随锚杆和锚索等效支护力增大呈线性增大趋势,但随注浆修复系数呈指数增大趋势。锚杆和锚索支护设计时应以极限承载力所需的注浆修复系数等于1.0时的等效支护力临界条件为基准。深浅孔注浆支护时须同时考虑注浆修复系数和围岩破裂区半径。不同支护措施的协同支护参数可由破裂修复区围岩极限承载平衡条件确定。数值模拟和工程应用分析表明,分步联合支护可实现深部软弱围岩碎胀大变形控制,具有较高的工程推广应用价值。Large deformations in deep tunnels pose a significant challenge to safe and efficient mining.To control the stability of deep soft surrounding rock,a combined support method and its theoretical analysis model were proposed,based on the evolution of large deformation in deep tunnels.Results indicated that deep soft surrounding rock can be categorized into fracture deformation,damage and expansion deformation,and continuous deformation zones.Following the implementation of combined support measures,the ultimate bearing capacity increased linearly with the equivalent support forces of anchor rods and cables and exponentially with the grouting reinforcement coefficient.The parameters for pre-stressed bolts and cables should be determined based on bearing balance conditions when the grouting reinforcement coefficient is 1.0.Both the grouting reinforcement coefficient and the fracture zone radius of surrounding rock should be considered in the design of grouting support for deep and shallow holes.Collaborative support parameters for various support measures were determined by the ultimate bearing capacity balance conditions of the surrounding rock in the reinforced fracture zone.Numerical simulation and engineering application analysis demonstrated that the large deformation of deep soft surrounding rock can be controlled through the collaborative control of support structures.The combined support method can be widely applied in other tunnel engineering projects.

关 键 词：深部软弱围岩 大变形 分步联合支护 承载平衡 协同控制 

分 类 号：TD322[矿业工程—矿井建设]