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DOI:
矿冶:2022,31(4):-
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逆断层影响区域破碎巷道稳定性控制对策分析
(1.矿冶科技集团有限公司;2.国家金属矿绿色开采国际联合研究中心)
Stability control strategy analysis of broken roadway in affected area of reverse fault
WANG Zhixiu1,2,3,2, Yuan YeYU1, Shibo1
(1.BGRMM Technology Group;2.China;3.National Center for International Joint Research on Green Metal Mining)
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投稿时间:2021-11-30    修订日期:2021-12-30
中文摘要: 福建马坑铁矿中矿段区域矿体受到贯穿逆断层影响,近断层区域岩体稳定性较差,从而导致巷道支护难度大、多次返修等问题。针对该问题,通过采用现场超声波测试,利用波速梯度最大数值作为松动圈范围判别准则,确定该巷道的松动圈范围1.6m~1.8m;结合现场踏勘、岩体质量分级与理论计算结果,提出近断层区域巷道支护方案,即树脂锚杆+金属网+喷射混凝土+钢拱架联合支护方式,树脂锚杆长2.5 m,锚杆间排据均为1.2 m,喷射混凝土厚度为100 mm,采用数值模拟方法,进行支护参数优化方案与现场支护方案对比,模拟结果显示,优化的支护方案可控制围岩变形,提高围岩自稳能力,具有良好的支护效果。
中文关键词: 逆断层  松动圈  数值模拟  支护方案
Abstract:The regional ore body in the middle section of Makeng Iron Mine in Fujian province is affected by the through-thrust fault, and the stability of rock mass near the fault area is poor, which leads to the problems of roadway support difficulty and repeated repair. To solve this problem, the maximum value of wave velocity gradient was used as the criterion to determine the range of loose ring by field ultrasonic test, and the range of loose ring was determined from 1.6m to 1.8m. Combined with the site survey, rock mass quality classification and theoretical calculation results, a supporting scheme of roadway near fault area is proposed, that is, resin bolt + metal mesh + shotcrete + steel arch combined support mode. The length of resin bolt is 2.5m, the data between bolts are 1.2m, and the thickness of shotcrete is 100 mm. Numerical simulation method is adopted. The simulation results show that the optimized supporting scheme can control the deformation of surrounding rock, improve the self-stability of surrounding rock, and has good supporting effect.
文章编号:     中图分类号:TD353    文献标志码:
基金项目:国家重点研发计划项目(编号:2020YFE0202800)第一
引用文本:
王志修,原野,于世波.逆断层影响区域破碎巷道稳定性控制对策分析[J].矿冶,2022,31(4):.

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