摘要
一、“三小锚杆”推广使用概况为了改变回采巷道因支护方式落后、地压大,变形严重,影响生产等状况,从1990年10月以来,推广试用了对岩层类别适应性强,粘结锚固安全可靠的“三小锚杆”(小钻头、小孔径、小药卷锚杆)。1.地质条件概况。
The paper discussed the extensive usage of slender bolt hole and also analysed its practically applied effect. In light of the bolt arrangement the anchor force has still a certain safety factor. Such bolts are mainly applied to relative solid roof strata. In order to spread the application of this technique, such problems as drilling machine, drill rod, bit, resin cartridge,etc. used for slender bolt hole should besolved.
出处
《矿山压力与顶板管理》
1992年第3期31-34,81,共4页
Ground Pressure and Strata Control
