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我队在某石膏矿施工，钻进的是第三系和第四系的地层，可钻性2～4级。上第三系为半胶结的松散砂砾层、夹砂粘土层等未成岩体系，此层渗漏，易于塌塌；下第三系为砂质泥岩和泥质砂岩互层，间夹石膏层，此层遇水膨胀缩径。开始施工的两个钻孔经常出现坍塌、缩径、卡埋钻具等孔内事故。通过学习兄弟队的经验和我们反复实践，摸索了一些规律，采取了一些有效措施，较顺利地结束了该矿区的钻探工作。现将我们的工作体会总结如下：
My team in a gypsum mine construction, drilling is the Tertiary and Quaternary formations, drillability of 2 to 4. On the Tertiary for the semi-cemented loose gravel layer, sand folder clayey layer of diagenetic system, this layer seepage, easy to collapse; the next Tertiary sandstone and mudstone interbedded sandstone, sandwiched between gypsum layer, This layer expands with water shrinking diameter. The two boreholes that started construction often suffered holes such as collapsing, shrinking, and stuck drill holes. Through studying the experience of Brother Brigade and our repeated practice, we have explored some laws and taken some effective measures to end the drilling of the mine area more smoothly. Now our work experience summarized as follows: