论文部分内容阅读
矿山最初采用锚杆支护是于本世纪初开始的,而正式推广应用可说是在1950年.初期使用的是前端带有楔铁、用机械锚固的楔缝式锚杆,到60年代出现了可靠性能高的粘结式锚杆,现在日本几乎都用此种类型的锚杆.关于锚杆支护的作用和效果可举出悬吊效果、合成梁效果、拱型压缩带和挤压连接效果等例.它不仅不比常规支护、钢质拱型支护效果差而且还具有如下一些优点:(1)由于它体积小不需专用保管场所,搬运方
The mine was initially supported by bolting at the beginning of this century, but the formal application was 1950. The initial use was wedge-type, mechanically anchored, wedge-type anchor with a front end that appeared in the 1960s Nowadays, almost all types of anchors are used in Japan, which have high reliability and reliability.Because the effect and effect of bolt support can be described as suspension effect, synthetic beam effect, arch compression band and extrusion Connection effect, etc .. It not only does not than conventional support, steel arched support effect is poor but also has some of the following advantages: (1) Because of its small size without special storage place, the carrier