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在地质勘探工作中,为了探明不同形状的矿体、盲矿体、断层部位等,必须保证钻探施工质量,满足设计要求.设计上规定终孔方位偏差值不超过正负20°,每百米倾角变化在2°范围内.当孔深500米以上,岩层倾角大于45°,在地质情况比较复杂时,钻进中方位和倾角的变化,导致钻孔很难达到预计的终点位置.为了不降低设计要求,施工时必须采取多方面的预防措施,据我们体会,在处理钻孔方位偏差过大方面,自动导斜是有成效的方法之一.
In the geological exploration work, in order to ascertain the different shapes of ore body, blind ore body, fault site, etc., we must ensure the quality of drilling construction to meet the design requirements.Design the final hole orientation deviation does not exceed the positive and negative 20 °, each hundred When the hole depth is more than 500 meters and the rock dip angle is more than 45 °, the change of the azimuth and inclination during the drilling will make it difficult to reach the predicted end position when the geological conditions are complicated. Do not reduce the design requirements, the construction must take a wide range of preventive measures, we understand that in dealing with the drilling deviation is too large, automatic guide inclined is one of the effective methods.