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大量实践表明,锚杆喷混凝土是地下工程有效的支护形式,但是它的支护原理还在探讨中。 一个稳定的支护体应该具有一定的结构形式和必要的强度。为了探讨这个问题,我们选择了测定巷道围岩松动圈和锚固体强度的方法,去研究锚杆喷混凝土是怎样满足了上述两个条件。 朱仙庄矿的观测结果表明,围岩松动圈的大小随着围岩的不同而变化,通过分析进一步
A large number of practices show that the shotcrete is an effective supporting form of underground engineering, but its supporting principle is still under discussion. A stable support body should have a certain structure and the necessary strength. In order to explore this problem, we have chosen a method of determining the strength of rock loosening ring and anchor in surrounding rock of tunnel to study how the shotcrete concretes meet the above two conditions. The observation results of Zhuxianzhuang Mine show that the size of the surrounding rock loose ring varies with the surrounding rock.