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| Stability control strategy analysis of broken roadway in affected area of reverse fault |
| Received:November 30, 2021 Revised:December 30, 2021 |
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| DOI： |
| KeyWord:Reverse fault; Loose circle; Numerical simulation; Support plan |
| Author | Institution |
| WANG Zhixiu |
BGRMM Technology Group;China;National Center for International Joint Research on Green Metal Mining;China; |
| Yuan YeYU |
BGRMM Technology Group |
| Shibo |
BGRMM Technology Group |
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| 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. |
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