Stability Analysis of-410 m Horizontal Main Return Air Roadway in Jinshandian Iron Mine
Jinshandian Iron Mine is currently recovering-410 m horizontal residual ore body.In the process of tunneling blasting,the main return air roadway will be affected by blasting vibration,and there are safety risks.In order to carry out mining activities safely and reasonably and reduce the influence on the return air roadway,three field test tests of blasting vibration are carried out.The attenuation law of blasting vibration of Jinshandian Iron Mine is obtained by linear fitting with the least square method,and it is deter-mined that the influence of mining blasting on the stability of the surrounding rock of the return air roadway is small.On this basis,LS-DYNA numerical simulation software is used to simulate the stress,displace-ment and vibration velocity attenuation laws of the surrounding rock of the return air roadway under different blast source distances,and determine the influence degree of the blast source distance on the stability of the surrounding rock of the return air roadway,which is conducive to ensuring the stable operation of the mine and sustainable economic development.
recovery of residual ore bodyblasting vibrationroadway stabilitynumerical simulation
NETL
NSTL
万方数据
