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320铀矿在地下水位以下126.1米的一条巷道掘进中必须穿过一段裂隙发育的石英岩层,预计出水量每小时约为300～350米~3,水温约47℃,水压为11大气压;而当时尚未建设永久性泵房和水仓,若大量出水势将造成淹井事故。针对这个情况,采取了打探水孔进行超前注浆的措施,将岩层的导水裂隙堵死,从而消除了淹井的危险,使开拓工程顺利进行,并且改善了作业条件,节省了排水费用。
The 320 uranium must pass through a section of quartz rock formation with fractures during tunneling of 126.1 meters below the groundwater level. It is estimated that the water output will be about 300-350 m 3 per hour, the water temperature will be about 47 ° C and the water pressure will be 11 atm. At that time, a permanent pumping station and water storage tank had not been constructed yet. If a large amount of water was discharged, it would cause an accident of flooding. In response to this situation, taking measures to advance water injection hole grouting measures, blocking rock fissures, thereby eliminating the danger of flooding wells, so that the smooth development of pioneering works, and improve the working conditions, saving the cost of drainage.