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我队矿区地层大都为大理岩、矿层及闪长岩。大理岩和闪长岩节理发育，裂隙及溶洞极多，除钻孔漏失冲洗液现象极为严重外，大理岩中有几百分厘至十几公尺深度不等的黄泥夹层，钻进时有缩径现象，另外因岩层较破碎，孔壁亦有不同程度的掉块现象，部分地段矿层及闪长岩顶板风化严重，钻进中有岩矿粉坍塌现象。在上述复杂地层中钻进，有些钻孔使用粘度30秒左右的泥浆，虽能解决部分问题，但因地层特殊，单纯使用泥浆还不能完全保全孔壁。为保证顺利钻进，部分钻孔必须下入套管护孔。由于地层复杂，套管下入后难以起拔，给工作带来损失，因此在建队初期，
Most of the mine strata in my team are marble, ore and diorite. There are many joints and fractures in marble and diorite. In addition to the extremely serious loss of drilling fluid due to leakage of drilling fluid, the marble has a yellow mud interlayer ranging from several hundred centimeters to tens of meters in depth. In addition, due to the crushing of the rock formation, the wall of the pore wall also has different degrees of falling-off phenomenon. Some sections of the coal seam and the diorite roof are heavily weathered, and rock and mineral powder collapses during drilling. Drilling in these complicated formations, some drilling mud with a viscosity of about 30 seconds, although part of the problem can be solved, but due to the formation of special, simple use of mud can not completely protect the hole wall. In order to ensure smooth drilling, some drilling holes must be under casing protection. Due to the complexity of strata, it is difficult to pull up after the casing is intruded, which brings losses to the work. Therefore, in the initial stage of establishing a team,