Abstract:During the process of estimating the resource reserves by using vertically longitudinal projection map, when the ore body is oblique crossing to the boundary of the mining right, it is difficult to determine the right position of the boundary of the mining right on the vertically longitudinal projection map. In this paper, the method for determining the projection position of the mining right boundary in the vertical position of the resource reserves by using different section plane graphs and calculation formula has been introduced. It has certain reference value to solve this kind of problem.