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一、概述锡铁山矿区在50年代就进行过勘探，该区属变质火山岩地层，层理、片理极为发育，岩层软硬不均，产状陡，换层频繁，有明显的各向异性，由于地质情况复杂，钻孔顶角易下垂或上漂，方位很难控制，多数钻孔存在着偏离勘探线的问题。从1985年起，连续两年在该区采用连续造斜器、取出式偏心楔、普通稳斜式促斜钻具等综合治理手段施工定向孔，但均不理想。为此决定采用螺杆钻定向钻探新技术施工ZK3202
First, an overview Xitianshan mining area in the 1950s on exploration, the area is a metamorphic volcanic rock strata, bedding, very well-developed, hard and soft rock uneven, steep appearance, frequent layer changes, there is significant anisotropy Due to the complex geological conditions, the top corner of the drilling is apt to sag or drift, and the bearing is difficult to control. Most drilling holes deviate from the exploration line. Since 1985, two consecutive years in the area using a continuous whipstock, remove the eccentric wedge, the general steady oblique impelling oblique drilling tools and other comprehensive means of construction directional holes, but are not ideal. To this end decided to use screw drilling directional drilling new technology construction ZK3202