论文部分内容阅读
我队曾在大河沟矿区进行金刚石钻探.该矿区矿体产状陡,变化较大.勘探设计有直孔,也有斜孔.施工中,直孔顶角有不同程度的上漂,斜孔顶角则普遍下垂,一般每百米下垂2～3°,严重的达6～7°. 通过对该矿区地层与孔斜资料的对比分析,可以明显看出,地层情况是造成钻孔弯曲的主要原因.当钻孔与层理面成某个角度钻进时,往往垂直于层理面的方向发生弯曲. 该区地层倾向北东20～40°,倾角一般为20～40°;矿体产于断层破碎带中,断层破碎带倾向南偏西190～210°,倾角75°左右.所以斜孔设计方向为北北东,与地层倾向一致.钻孔弯曲情况如表列.金刚石直孔钻进,钻孔与层理面交角大约
My team once conducted a diamond drilling in the Dahegou mining area, which has a steep and varied ore body, with straight holes and inclined holes in the exploration design. Generally, the angle is generally drooping, usually 2 ~ 3 ° for every 100m, and 6 ~ 7 ° for serious. Comparing and analyzing the stratum and borehole inclination data in this mining area, it can be clearly seen that the formation is the main cause of the bend in the borehole The reason is that when the borehole drills at an angle to the bedding plane, it tends to bend perpendicularly to the bedding plane. The strata of this zone tend to be 20-40 ° north-easterly and the dip angle is generally 20-40 °. In the fault fracture zone, the fault fracture zone tends to be 190-210 ° south westward and about 75 ° dip angle, so the design direction of the inclined borehole is north-north east and consistent with the formation propensity. Into, drilling and bedding plane angle about