摘要
在矿山开采过程中,地压易导致巷道发生变形及破坏,合理有效的巷道支护可以极大程度地减少地压对生产活动的影响。以山东黄金某金矿为研究背景,基于巷道支护理论,依托矿山现有支护方式,借助FLAC3D数值软件对不同支护参数下1780m水平巷道位移及塑性区变形情况进行分析,同时采用灰色关联分析法,对支护参数进行优选。研究结果表明:针对Ⅲ级围岩,设计C30喷射混凝土厚度70mm,管缝式锚杆直径40mm、长度1.8m,锚杆网度2m×2m为最优支护设计;针对Ⅴ级围岩,采用喷射混凝土+锚杆+钢支架进行支护,钢支架间距为1.5 m,实现了对巷道变形的有效控制。
In the mining process,ground pressure is prone to cause deformation and failure of the roadway,reasonable and effective supporting of roadway can significantly reduce the influence of ground pressure on production activities.Taking agold mine in Shandong Gold Group as the background,based on the roadway support theory and the existing mine support methods,FLAC3 Dnumerical software was used to conduct analysis on the displacement and plastic zone deformation of 1780 mhorizontal roadway under different support parameters.Meanwhile,the grey correlation analysis method was used to optimize the support parameters.The research results show that,forⅢlevel of surrounding rock,the optimal supporting parameters are designed as the C30 shotcrete thickness of 70 mm,the pipe joint bolt diameter of 40 mm,length of 1.8 m,and anchor net degree of 2 m×2 m.ForⅤlevel of surrounding rock,shotcrete,bolt and steel support can achieve the effective control of roadway deformation,with steel support spacing of 1.5 m.
作者
康明超
李腾
王乃伟
唐文平
唐老虎
KANG Mingchao;LI Teng;WANG Naiwei;TANG Wenping;TANG Laohu(Civil and Resource Engineering School,University of Science and Technology Beijing,Beijing 100083,China;Gansu Longnan Xihe County Zhongbao Mining Co.,L td,Longnan,Gansu 746511,China)
出处
《矿业研究与开发》
CAS
北大核心
2021年第1期21-27,共7页
Mining Research and Development
基金
中央高校基本科研业务费项目(FRF-TP-15-042A1)
国家自然科学基金项目(51804016)。
关键词
分级围岩
巷道支护
参数优化
灰色关联
数值模拟
Graded surrounding rock
Roadway support
Parameter optimization
Gray association
Numerical simulation
