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一、情况我队在三个矿区的石灰岩中，进行了石膏普查的钻探工作。共施工24个钻孔，完成钻探工作量13000多米，平均孔深550米左右，最深孔为693米。优质孔率1982年为82.4％，1983年为100％。该矿区地层，属于古生代寒武纪、奥陶纪及中生代石炭纪泻湖沉积的石灰岩类地层。岩石硬度平均在3—4级。由于受风化剥蚀、溶蚀、及淋滤作用的影响，地层复杂多变，溶洞极为发育，大多在孔深350米以上，要遇到大小不同的溶洞和断裂带。最大的溶洞为
First, the situation I team in the three mining limestone, gypsum survey drilling. A total of 24 holes were drilled to complete the drilling workload of more than 13,000 meters with an average depth of about 550 meters and the deepest hole was 693 meters. The high porosity was 82.4% in 1982 and 100% in 1983. The strata of this mining area belong to the limestone-type sediments deposited in the Paleozoic Cambrian, Ordovician and Mesozoic Carboniferous lagoons. Rock hardness average 3-4. Due to the influence of weathering and erosion, erosion and leaching, the strata are complex and changeable, and the karst caves are extremely developed. Most of them are over 350 meters deep and encounter different sizes of caves and faults. The largest cave is