Research on Surrounding Rock Control Technology for Compound Roof Tunnels in Deshun Coal Industry
In order to solve the problems of difficult roof support and poor support effect in the mining process,based on the compound roof rock layer and anchor cable support situation of the 11106 working face of Deshun Coal Industry,FLAC3D numerical simulation software is used to establish a compound roof rock layer and anchor rod support model,simulating the strength,stability,integrity and other conditions of the compound roof rock layer when different pre tightening forces are applied to the anchor rods;The simulation results show that the high prestressed anchor rod has a strong support effect and enhances the self bearing capacity of the surrounding rock.Based on the simulation results,the long and short anchor cable support method was adopted to support the roof of the 11106 working face.Monitoring found that the stability of the roof was good,and good results were achieved in on-site practice.
Compound roofRoof supportLong and short anchor cableHigh prestressed stress
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NSTL
万方数据
