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石门掘进长度600米,是在深度1500米左右的夹层为辉绿岩的变质白云母-黑云母页岩中进行的。岩石硬度系数f=12～14,岩温56～57℃。 掘进工作由综合掘进队承担,其组成人员中包括有爆破工和电机车司机。三班作业,每周有两个休息日。每班出勤5名掘进工。石门支护用锚喷,喷厚40～50毫米,喷浆在工作面后20～30米进行。 打眼用两台CBKHC-2型钻车,使用一字型钻头,直径36毫米。一个循环中打200米左右的眼,其中13.5米(9个眼)是为安装锚杆支架用。用两台
Shimen excavation length of 600 meters, is in the depth of 1500 meters interlayer of diabase diablastic metamorphic - biotite shale. Rock hardness coefficient f = 12 ~ 14, rock temperature 56 ~ 57 ℃. The excavation work is undertaken by the Integrated Driving Team and its composition includes blasting workers and motor-driven drivers. Three shifts, two rest days each week. Attendance of five diggers in each class. Shimen support anchor spray, spray thickness 40 ~ 50 mm, shotcrete in the face after 20 to 30 meters. Hit with two CBKHC-2-type drilling vehicles, the use of a type drill, a diameter of 36 mm. A loop of playing about 200 meters eye, of which 13.5 meters (9 eyes) is used to install the anchor bracket. With two