Research and Application of Active Advance Support Technology for Mining Roadways in Longfeng Coal Mine
DOI:
https://doi.org/10.29227/IM-2026-01-01-033Keywords:
active advance support, surrounding rock deformation control, numerical simulation, field monitoringAbstract
Aiming at the problems of roof crack propagation, side bulging and difficult surrounding rock control of the 120902 transportation roadway in Longfeng Coal Mine subjected to advance abutment pressure, an active advance support system with coordinated bearing capacity consisting of cable bolts, W steel strips and resin anchoring agents is established based on the suspension theory and Mohr - Coulomb strength criterion. Verification of support parameters, FLAC3D numerical simulation and field monitoring are carried out. The results show that key parameters including cable bolt anchorage length, suspended load and quantity of resin cartridges meet the safe bearing requirements. A single cable bolt can effectively bear the load of fractured rock strata, and the support system possesses sufficient coordinated bearing capacity. Numerical simulation results reveal that the maximum convergence of roadway sides and roof - floor under active support decreases to 376 mm and 334 mm respectively, representing a reduction of more than 30% compared with the unsupported condition. Field monitoring indicates that the maximum roof - floor convergence and side convergence are only 34 mm and 31 mm, the surrounding rock loose circle is controlled within 1.78 m, the qualification rate of rock bolts reaches 81.6%, and the stress of support structures remains stable. This technology can effectively control the deformation of mining - induced surrounding rock and guarantee roadway stability and safe mining of the working face. It can provide references for the support of mining roadways in mines with similar geological conditions.
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