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支护与维护技术方面针对软岩巷道成巷及使用期间巷道围岩将出现的两种变形问题,即在成巷初期以碎胀变形和弹塑性变形为主,巷道受动压影响期间以蠕变流变为主,本文提出同时采用松动圈理论和流变理论进行围岩失稳机理研究。基于松动圈理论的“锚网索喷”初次支护与基于流变理论的“U型钢支架”二次大刚度高强度支护相结合的联合支护方案(技术实验曲线如图1和图2所示),实现了初次支护充分让压并调动围岩承载力及二次大刚度高
In terms of support and maintenance technologies, two deformation problems that occur in the surrounding rock of soft rock roadway and its surrounding during use are as follows: initial deformation and elasto-plastic deformation in the initial laneway, In this paper, the theory of loose ring and rheological theory are used to study the instability of surrounding rock. Based on the loose ring theory of “anchor net spray ” primary support and based on the rheological theory “U-steel stent ” second large stiffness and high strength support the combination of joint support program (technical experimental curve shown in Figure 1 and Figure 2), to achieve full support for the initial support and mobilization of surrounding rock bearing capacity and secondary high stiffness