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一、封孔（一）概述封孔是钻孔施工的最后一项工序，即钻孔峻工以后，为了封闭和隔离所遇到的含水层及透水岩层而进行的封闭止水工作。固体矿产勘探钻孔的封孔目的是：①隔离矿体顶、底板的含水层，防止矿山开采时因地下水流入造成水淹事故；②防止地面水沿钻孔流入矿内，造成采矿的困难；③防止地表水和地下水对矿床的溶蚀和氧化，影响矿石的开采和利用。由此看出，封孔质量的好坏既影响着地下资源能否经济有效的开采和利用，
I. Sealing hole (1) Overview Sealing hole is the last process of drilling construction, that is, sealing and sealing work for closing and isolating the encountered aquifer and permeable rock formation after completion of drilling. The purpose of sealing the hole in the solid mineral exploration drilling is to: 1 isolate the aquifer at the top and bottom of the ore body, prevent the flooding accident caused by the inflow of groundwater during mining, and 2 prevent the surface water from flowing into the mine along the borehole, causing mining difficulties; 3 Prevention of corrosion and oxidation of ore deposits by surface water and groundwater, affecting the mining and utilization of ores. From this, it can be seen that the quality of the sealing hole not only affects the economical and effective exploitation and utilization of underground resources,