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我队先后三次参加石门东山峰磷矿勘探。前两次在矿区南翼施工。系一般硬、脆、碎磷矿地层。去年转移至北翼大成湾矿区勘探，钻孔大多穿过溶洞、裂隙或岩溶裂隙群，因而孔内情况复杂，不仅施工难度大，同时亦给钻探技术提出了许多新的课题。由于及时总结施工经验教训，摸清岩溶规律，改革工艺，采用大、小口径分层钻进，取得了良好效果。在不足十个月的施工期内，完工钻孔46个，累计进尺19.861米。优质孔占81.3％，台效平均284米，单位成本38.19元/米，钻进效率和工程进度逐月提高。全队提前59天超额完成生产计划。现将该矿区岩溶地层钻探施工技术措施总结如下：
Our team has participated in the phosphate rock exploration in Shimen East Mountain Peak three times in succession. The first two times in the mining area south wing construction. Department of general hard, brittle, broken phosphate strata. Last year, it was transferred to the Dachengwan mining area in the north wing for exploration. Most of the boreholes were drilled through karst caves, fissures or karst fissures. As a result, the situation in the borehole was complicated and not only difficult to construct, but also raised many new topics for drilling technology. Due to the timely summary of construction experience and lessons, find out the law of karst, reforming the process, using large and small diameter stratified drilling, and achieved good results. During the construction period of less than 10 months, a total of 46 holes have been completed with a total footage of 19.861 meters. 81.3% high-quality holes, Taiwan average 284 meters, the unit cost of 38.19 yuan / m, drilling efficiency and progress of the project increased month by month. Team 59 days ahead of schedule to complete the production. Now the mining karst stratum drilling construction technology measures are summarized as follows: