. Machinery for metalliferous mines : a practical treatise for mining engineers, metallurgists and managers of mines. king face before all the debris has been removed, thereby economisingtime. In cases where timbering is necessary, and the stretcher barshave to be lowered to clean up, arrangement is made whereby these,with their machines can be turned back down on to the carriage. The i86 MACHINERY FOR METALLIFEROUS MINES. small receiver shown on top of the carriage is for the distribution ofair, and it has two inlets and four outlets, corresponding to the numberof drills. The tanks shown on e
. Machinery for metalliferous mines : a practical treatise for mining engineers, metallurgists and managers of mines. king face before all the debris has been removed, thereby economisingtime. In cases where timbering is necessary, and the stretcher barshave to be lowered to clean up, arrangement is made whereby these,with their machines can be turned back down on to the carriage. The i86 MACHINERY FOR METALLIFEROUS MINES. small receiver shown on top of the carriage is for the distribution ofair, and it has two inlets and four outlets, corresponding to the numberof drills. The tanks shown on each side are the water injectors, theinjection being effected by admitting air under pressure above the surfaceof the water. The tunnel for which the machines are designed willbe driven not only from each end, but by sinking a shaft midway twoadditional working faces will be provided, making four points of four sets of tunnelling plant required were all supplied byMessrs. Schram, amounting, in toto, to eight locomotive type boilers,four air compressors, with their receivers, four carriages of the type. Fig. 130.—Schrams Rock Drill Carriage. just described, and thirty-two rock-boring machines, with the accessoriesnecessary for opening out the tunnel. In mining proper, a tunnel of such large dimensions would rarely, ifever, be undertaken ; but I illustrate the method adopted in such casesbecause men accustomed to the use of rock drills are often drafted fromtheir legitimate sphere to conduct works coming under the designationof civil engineering. The drill hole, when the machine is at work, must be kept constantlyfull of water, not only in order to remove the chippings, but also tokeep the point of drill cool, A water tank of iron mounted on a truck,and brought as near the working face as possible, is therefore a fig. 130 this water tank is shown fi.\ed in the carriage support, andsurmounted by a funnel. The pressure of the air drives out the waterthroug
Size: 1839px × 1358px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyo, bookyear1902
