深部软岩巷道支护原理及应用

针对深部软岩巷道四周来压、整体收敛、变形强烈的特点,研究深部软岩巷道支护原理,提出了主动有控卸压的方法,释放围岩膨胀变形能,将高应力向围岩深部转移,减小浅部围岩应力。针对古汉山矿西大巷地质条件确定了合理的释放变形空间;提出应用高水速凝材料注浆加固遇水弱化、膨胀的泥岩;研究得到确定合理二次支护时间的方法;该成果成功地应用于工程实践,有效控制了深部软岩巷道大变形。

Theory and application of supporting in deep soft roadways

Based on the surrounding pressure,shrinkage of whole body,strong deformation characteristics of soft rock in deep roadways,a stress-relief method of active control was established.It was put forward that the expansive deformation energy of surrounding rock would be released,the high stress be transferred to the deeper surrounding rock,and the stress in shallow rock be reduced.Considering the geological conditions of the west tunnel in Guhanshan Mine,the rational space for deformation release was determined.Using high-water rapid hardening materials to reinforce the mudstone easily weakened and expanded by water,the rational time of the secondary support was obtained.The obtained results were successfully applied in the coal mining,and the large deformation of soft rock in deep roadways could be controlled effectively.