【摘要】 根据龙口矿区极软岩巷道不同支护形式的矿压观测和变形曲线分析,认为锚杆长度的增加恶化了支护效果,大大小于松动圈的围岩注浆其效果与大范围注浆效果基本等同或更优越。为此,在理论、数值模拟与现场实践基础上提出了提高支护体强度、减小支护范围、选择合理的支护时机以提高支护效果的强壳-体支护结构的概念、支护机理、支护特点与要求以及支护的几种基本型式。更多还原

【Abstract】 According to the analysis on observed pressure and deformation curves of different support types in very soft rock roadway,it can be obtained that the increase of bolt length deteriorates the support effect,and that the grouting effect in surrounding rocks whose range is much smaller than broken zone is no less than that in large range.Therefore,based on theory,numerical simulation and in-situ practice,the concept of the reinforced-crust support structure,support mechanism,characteristics,requirement and several types are brought out by increasing support strength,reducing support range and choosing suitable time.更多还原