【摘要】 采用数值模拟计算与物理模型相似试验,并与正交设计相结合,分析了锚杆"导轨作用"效应受各影响因素的影响程度以及影响趋势规律。结果表明:对锚杆轴力影响最大的是岩性,随着节理错动,锚杆直径和节理性质的影响增大;直径和锚固角是分离量的主要影响因素,剪切位移最大时,岩性成为最大影响因素,交角与分离量呈负增长,其他因素均为正相关;对岩体剪切强度影响最大的因素是岩性,节理性质次之,除锚固角外,其他因素均与剪切力呈正增长。在影响规律基础上,分析了各因素对锚杆导轨效应影响的内在机理,并通过室内试验做了进一步验证。研究成果对煤炭开采等工程载荷下裂隙岩体稳定性的锚杆加固控制以及保证工程安全具有积极意义。更多还原

【Abstract】 By doing numerical analysis and physical tests, combined with orthogonal design, influence extent and law of various factors on transverse railway effect of bolt have been achieved. The result has shown that lithology is the biggest factor on axial stress of bolt, and effects of bolt diameter and friction coefficient increase with the shear shift. Diameter and anchorage angle are major factors on separation, and lithology is the most important factor when the shift is the biggest. Among the factors on strength of jointed rock, lithology comes first, and joint comes second. Other factors are positively correlated with shear force, except for anchorage angle. Based on the influence rules, internal mechanisms have been derived. Advanced laboratory test has shown that the results are in reasonable agreement with those acquired from experiment and the simulation model is suitable for modeling transverse effect. The research achievement has a positive significance on the jointed rock mass stability controlling by bolt and engineering security under the coal mining load.更多还原