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我矿五一掘进队,于1982年4月在我矿-260大巷,创全岩平巷光爆锚喷施工月成巷199米的好成绩。折算月进尺231米,掘进工效为0.24米/工,喷射工效为2.2米~3/工,眼痕率为82.4％,工程质量优良,各种消耗均降到了计划定额以下。 -260大巷断面8.14米~2,为中细粒硬砂质长石、石英砂岩,f=9。此巷已掘进1800米。四月份迎头正接近F_(17)号断层,平均涌水量为0.25米~3/分。巷道采用长1.5米金属倒楔式锚杆、喷水泥砂浆支护,喷厚为7厘米。该巷设计有正规的水沟(图1)。采用钻爆法破岩,用ZY-24型风钻凿岩。改制的P-30B耙斗机装岩,耙斗容量为0.3米~3,两
I mine 51 Maying team, in April 1982 in mine mine -260 Lane, creating a rock Yanbian Bolt blasting construction into a lane 199 meters good results. Converted into a monthly footage of 231 meters, tunneling efficiency of 0.24 m / worker, jetting efficiency of 2.2 m ~ 3 / workers, eye marks rate of 82.4%, the project of good quality, all kinds of consumption have dropped below the planned quota. -260 Lane section of 8.14 m ~ 2, for the fine grained hard feldspar, quartz sandstone, f = 9. This lane has been dug 1800 meters. April is approaching the F_ (17) fault, the average water inflow of 0.25 m ~ 3 / min. Roadway with a long 1.5 m metal inverted wedge anchor, spray grouting mortar support, spray thickness of 7 cm. The lane is designed with regular ditches (Figure 1). Drilling and blasting method using rock breaking, with ZY-24-type wind drilling. Reconstruction of the P-30B rake bucket machine rock, bucket capacity of 0.3 m ~ 3, two