Abstract:
In Xinyang Colliery,serious deformation and difficult supporting occurred in advanced supporting section of rail roadway of new 102 full-mechanized caving mining face influenced by multi-time abutment pressures and new 102 face mining.On the basis of analyzing deformation and damage mechanism of the roadway,a combined supporting of“anchored mesh+W steel strip+anchored cable+ U-style steel”scheme was put forward.Within 30m of advanced supporting,ZT2×3200/18/35 advanced powered support was applied to reinforcing supporting.At the range of advanced 30-100m,reinforcement supporting of“single prop+π-style steel beam,1 beam+3 props”was applied.On-the-spot observation showed that roof subsidence reduced from 27mm/d to 8mm/d.This technology increased mining speed and improved economic profit in safety.