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1996年8月,陕西省核工业地质局二一四大队所属的二一四石膏矿686坑道1号采矿工作面顶板出现大范围渗水珠现象。经测试分析,该工作面板以上4米处。极有可能是高压透水区,一旦透水,将直接威胁686坑道的作业人员。更为严重的是,在二一四石膏矿下部还有4个乡镇矿点,3个斜井,后果不堪设想。矿领导当即决定,采用“阶梯导坑、固口疏导、超流截水、预裂成缝”的方案进行处理。
In August 1996, a large-scale water seepage phenomenon occurred at the roof of the No. 1 mining face of No.268 Gypsum Mine, which belongs to No. 214 Group of Nuclear Industry Geology Bureau of Shaanxi Province. After testing and analysis, the work of the panel above 4 meters. Most likely, the high-pressure water-permeable zone, once permeable, will directly threaten workers in tunnel 686. What is more serious is that there are also 4 townships and mines in the lower part of February 14 gypsum mine and 3 inclined shafts, which would have disastrous consequences. Immediate decision of the mine leadership, the use of “ladder pit, Gu mouth dredging, super-flow water, pre-cracking into the seam” program for processing.