封闭式支架对松软围岩作用的数值分析及应用

Numerical analysis on the function of enclosed supports on the soft surrounds rock and its application

针对极难维护放顶煤回采巷道的变形特点,依据FLAC程序对不同支架形式的巷道围岩应力场和位移场进行了数值模拟。综合比较来看,封闭式支架要优于不封闭支架;马蹄形或方环形支架要比半圆拱等支护形式好。应用数值模拟的结论,在现场进行了方环形支架与半圆拱支架的对比试验,取得了较好的效果。

Aiming at the characteristic of the distortion of the extremely hard maintained roadway, the numerical analysises were made on surrounding rock stress and displacement in roadway with FLAC program. Compared comprehensively, enclosed supports are better than non-enclosed supports; supports of square annular shape or 'U' shape are better than supports of semicircle arch. When applied in the contrast experiment to square annular supports and semicircle arch supports, the conclusion of numerical simulation is coherent with the result of the experiment.