千米深井煤巷桁架与锚杆支护效果的数值模拟研究

本文根据国内外有关研究成果,综合分析了桁架锚杆支护的作用机理及突出优势。采用有限元数值模拟研究方法,对煤巷桁架锚杆支护与锚杆的支护的作用效果进行了对比分析研究。表明桁架锚杆支护在改善巷道围岩应力状态、控制围岩塑性破坏区发育与围岩的变形方面的作用效果显著优于锚杆支护,为我国研究、试验及摧广煤巷桁架锚杆技术提供了初步的理论依据。

Research on coal roadway truss and numerical simulation of bolting support effect in km deep mine

According to the research results at home and abroad,the paper comprehensively analyzed and gave a demonstration of mechanism of single-truss and its stressing advantage.Comparison and analysis effect are given to single-truss and bolting supporting.by the way of element simulation.The paper shows that single truss supporting have better effect to bolting supporting to improving the stress condition of surrounding rocks,controlling the surrounding rocks plastic failure development zone and deformation effect of surrounding rocks,which provided the elementary theory basis to the research、experiment and expanding the single-truss bolting technology in colliery.