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在爆力崩矿的空场采矿法和分段崩落法中,拉槽、底柱回采等采矿工艺都需用倾斜扇形深孔。倾斜扇形深孔的倾斜面与水平面成某一交角∠A＇(图1),深孔必须根据∠A＇和它的伪倾角∠B＇换算成真方位和真倾角后才能给点施工。同样,现场实测的真方位和真倾角要反算出∠B＇和∠A＇才能制图和检查深孔施工质量。图1中的倾斜平面P与水平面相交,1为P面上的设计深孔。
In the open-pit mining of the open-field mining and subsidence caving method, the trough, bottom-pillar mining and other mining processes require the use of inclined fan-shaped deep hole. The tilted face of the inclined fan-shaped deep hole makes an angle of intersection ∠A ’with the horizontal plane (Fig. 1). The deep hole must be converted to true azimuth and true inclination according to ∠A’ and its pseudo-dip’B ’. Similarly, the actual azimuth and true inclination of field measurements are to be calculated back to ∠B ’and ∠A’ in order to map and inspect the quality of deep hole construction. The inclined plane P in Figure 1 intersects the horizontal plane, with 1 design deep hole on the P-plane.