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对于小规格的井筒,如果要进行两井间相向水平贯通,就提出了高精度的竖井定向问题。我矿多年来实践证明,小竖深井高精度定向,只要采用严格的延伸形三角形,尽管c边较短仍能满足要求。以2.5×3.5米规格井筒为例,当采用连接三角形时,c边为1.7～1.9米;若采用连接四边形,c边只能是2～2.5米,因为梯子间、电缆线、风水管、平衡锤等要占去1/4的井筒空间。计算证明,若小竖深井布置连接四边形,连接误
For small-sized wellbores, high-precision shaft orientation problems are put forward if the horizontal crossings between the two wells are to be carried out. Practice has proved that mine for many years, high-precision small vertical wells, as long as the use of a strict extension of the triangular shape, despite the short side of the c can still meet the requirements. Take 2.5 × 3.5m specification wellbores as an example. When connecting the triangle, the c-side is 1.7-1.9m. If the connecting quadrangle is used, the c-side can only be 2 ~ 2.5m because the ladder, cable, flue pipe, balance Hammer, etc. to account for 1/4 of the wellbore space. Calculations show that if the small vertical wells arranged to connect the quadrilateral, the connection error