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我队在丹东风化残余型高岭土矿区的钻探施工中，初期采用双层双动钻具钻进。一个月施工了两个浅孔，孔深均为20米左右，因工程质量差而报废。随后根据高岭土矿层特点，确定选用冲击钻进方法，来解决钻探施工取心问题。经过两年多施工七个矿段，共打了963个钻孔，完成了13267米工作量，平均台效1720米，每米材料成本5.24元，优质孔率达98.2％，矿层采取率达98％以上。生产效果表明，冲击钻进优于回转钻进，现将使用情况介绍如下。
My team in Dandong weathered residual kaolin mining construction, the initial double-action drilling with double drilling. One month construction of two shallow holes, hole depths are about 20 meters, due to poor quality and scrapped. Then according to the characteristics of kaolin strata, determine the choice of impact drilling method to solve drilling coring problem. After more than two years of construction, seven mines were drilled and a total of 963 holes were drilled. The workload of 13,267 meters was completed, with an average efficiency of 1,720 meters and a material cost of 5.24 yuan per meter. The rate of high-quality holes reached 98.2% and that of the mines reached 98 %the above. Production results show that the impact drilling better than rotary drilling, the use of the situation are described below.