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深部大断面硐室开挖顺序及支护参数优化
- 作者：
- 李宏业|杨亚平|雒焕祯|张席芝|史铭|王刚|陈勋
- 作者单位：
- 金川集团工程建设有限公司矿山工程分公司|金川集团工程建设有限公司矿山工程分公司|金川集团工程建设有限公司矿山工程分公司|金川集团工程建设有限公司矿山工程分公司|金川集团工程建设有限公司矿山工程分公司|金川集团工程建设有限公司矿山工程分公司|山东理工大学资源与环境工程学院
基金项目：
- 国家自然科学基金项目(52004152，52274108)
详细信息：
- 作者简介：
- 李宏业（1969—），男，高级工程师，硕士，从事采矿技术及矿山工程建设管理等方面的工作；E-mail：2712553912@qq.com
- 通讯作者：
- 陈勋（1992—），男，讲师，博士，从事金属矿高效开采及矿山充填等方面的研究工作；E-mail：ckchenxun@163.com
- PDF下载
Excavation sequence and support parameter optimization for large-section chambers in deep mining
- English Author：
- Mining Engineering Branch of Jinchuan Group Engineering Construction Co.,Ltd.|Mining Engineering Branch of Jinchuan Group Engineering Construction Co.,Ltd.|Mining Engineering Branch of Jinchuan Group Engineering Construction Co.,Ltd.|Mining Engineering Branch of Jinchuan Group Engineering Construction Co.,Ltd.|Mining Engineering Branch of Jinchuan Group Engineering Construction Co.,Ltd.|Mining Engineering Branch of Jinchuan Group Engineering Construction Co.,Ltd.|School of Resources and Environmental Engineering,Shandong University of Technology
- Unit：
- 摘要
- 在线预览
- 参考文献
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。
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
Abstract:
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 large-section 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 different 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.
Keywords:
deep mining;large-section;chamber;stability;numerical simulation;excavation sequence;support