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坑探作业中,打眼用水一般都采取小水桶分散供应,所用水之压力,因受到风压的限制,不能任意增大。一些利用天井进行集中供水的,也往往由于天井高度有限,水压也很小,特别是在高天井作业中,10公尺高的水柱,就相当于一个大气压。如天井送高40公尺,由于水柱本身重量所产生的压力,就已达到4公斤/平方公分。如果水的初压为5~6公斤/平方公分,那么到工作面水的終压就只剩下1~2公斤/平方公分(凿岩机用水的压力应不低于压縮空气压力0.5~1.0大气压——編者註)。由于压力小,水量也
In pit exploration operations, drilling water is generally distributed in small buckets, and the pressure of water used cannot be arbitrarily increased due to the limitation of wind pressure. Some of the centralized water supply using the patio is often due to the limited height of the patio and the water pressure is also very small. Especially in the high-pit operation, a water column of 10 meters in height is equivalent to an atmospheric pressure. If the patio is sent 40 meters high, it will have reached 4 kilograms per square centimeter because of the pressure of the water column itself. If the initial pressure of water is 5-6 kg/cm2, then the final pressure on the working surface water will only be 1-2 kg/cm2 (The pressure of the rock drill should not be lower than the compressed air pressure by 0.5-1.0 atmospheres. - editor’s note). Because of the small pressure, the amount of water is also