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我队于82年初经试验采用了Φ46绳索取心钻进技术施工了直孔,近几年来已经在三个石灰岩矿区完成绳索取心钻进尺6139.25米,孔深最浅50多米,最深230多米。在取得直孔绳索取心经验基础上,根据英德龙尾山石灰岩矿区的地质设计,针对该矿区地形峻峭、矿体产状陡的特点,布置了75°斜孔九个并配合水平孔四个,以了解深部矿层特征、
At the beginning of 82, our team adopted the Φ46 rope coring drilling technology to construct the straight hole. In recent years, the team has completed 6139.25 meters of rope coring drilling in the three limestone mines, with the shallowest depth of more than 50 meters and the deepest 230 meters. On the basis of obtaining the coring experience of straight-hole ropes and according to the geological design of limestone mine in Anglo-East Mountain, in view of the steep terrain and steep orebodies, there are nine 75 ° inclined holes and four horizontal holes , To understand the characteristics of deep ore,