Method for analyzing blank zone in extraction drilling control range based on three-dimensional space

The invention belongs to the technical field of coal mine gas disaster prevention and control, and particularly relates to an extraction drilling control range blank zone analysis method based on a three-dimensional space. Comprising the following steps: acquiring position information of all drill hole coal seeing points and coal stopping points in an evaluation unit; a three-dimensional coal seam is constructed according to the position information, three-dimensional extraction range models of coal sections are constructed according to the drilling extraction radius, and the sum of the three-dimensional extraction range models of all the coal sections serves as a drilling control range; a coal section is formed between a single-drill-hole coal seeing point and a coal stopping point, and a blank zone of a drill hole control range is determined by processing a three-dimensional coal seam and the drill hole control range. Compared with the traditional manual planar graph analysis, the method for determining the