深部大断面硐室开挖顺序及支护参数优化  

Excavation sequence and support parameter optimization for large-section chambers in deep mining

作　　者：李宏业 杨亚平 雒焕祯 张席芝 史铭 王刚 陈勋 Li Hongye;Yang Yaping;Luo Huanzhen;Zhang Xizhi;Shi Ming;Wang Gang;Chen Xun(Mining Engineering Branch of Jinchuan Group Engineering Construction Co.,Ltd.;School of Resources and Environmental Engineering,Shandong University of Technology)

机构地区：[1]金川集团工程建设有限公司矿山工程分公司 [2]山东理工大学资源与环境工程学院

出　　处：《黄金》2025年第1期75-81,共7页Gold

基　　金：国家自然科学基金项目(52004152,52274108)。

摘　　要：为解决深部大断面硐室开挖稳定性问题,采用数值模拟的方式开展深部大断面硐室开挖顺序及支护参数优化研究。建立了大断面硐室分布开挖模型,依据“先顶后帮”“先帮后顶”“帮顶同掘”的原则并参照工程现场中综掘机截割方式,设计16种模拟开挖方案。分别针对5种不同支护类型进行效果分析,并依据模拟结果对支护参数进行优化。结果表明:综合考虑塑性区变化、围岩收敛及开挖器具等因素,认为采用“先顶后帮”的断面开挖方式具有较小的扰动,并确认了最佳的开挖顺序。锚杆锚索和混凝土砌碹可以有效增加硐室的稳定性和承载能力,但硐室帮部、中间部位及底板中间部位仍存在变形,需要适当提高锚杆锚索的支护密度,并辅以注浆加强。To address the stability challenges when large-section chambers are excavated in deep mining,this study employed numerical simulations to investigate excavation sequences and optimize support parameters for largesection chambers.A distribution and excavation model for large-section chambers was established,and 16 excavation schemes were designed based on principles such as"roof first,then walls""walls first,then roof"and"simultaneous walls and roof"as well as the cutting approach of integrated excavator on mine site.The study analyzed the effects of 5 dfferent support types and optimized support parameters based on the simulation results.The findings indicate that the"roof first,then walls"excavation sequence results in minimal disturbances when considering factors like plastic zone changes,surrounding rock convergence,and excavation equipment.Bolts,cables,and concrete lining significantly enhance chamber stability and load-bearing capacity;however,deformation persists in the wall,middle,and middle areas of floors of the chamber.It is recommended to increase the density of bolts and cables and supplement with grouting for reinforcement.

关 键 词：深部开采 大断面 硐室 稳定性 数值模拟 开挖顺序 支护 

分 类 号：TD354[矿业工程—矿井建设]