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为了准确获取采空区空间体积,以采空区三维激光扫描系统探测到的原始数据为依据,提出采空区体积的三角网模型微积分算法.算法首先确定模型剖切的主轴方向,用一组等间距平行面对模型进行相切并获得剖面的无序点集,运用所提出的凸包压入法生成采空区剖面的初始边缘轮廓线;再将初始边缘轮廓线内的其他交点添加到剖面中,形成完整的采空区剖面形态;最后利用平面三角形有向面积叠加计算剖面面积,将剖面面积与微小间距进行积分获取采空区的体积.工程应用表明,所研究的采空区体积算法稳定性好,精度高,可实现对复杂采空区体积的有效计算.
In order to obtain the space volume of goaf accurately, the triangular mesh model calculus algorithm of goaf volume is proposed based on the original data detected by the three-dimensional laser scanning system of goaf. The algorithm first determines the principal axis direction of the cut, Group of equidistant parallel planes are tangent to the model and the disorder point set of the profile is obtained, and the initial edge contour of the gob section profile is generated by using the proposed convex hull penetration method. Other intersection points in the initial edge contour are added Finally, the sectional area is calculated by superposing the directed area of the plane triangles, and the sectional area and the small space are integrated to obtain the volume of the goaf. Engineering applications show that the mined-out area Volume algorithm has good stability and high precision, which can effectively calculate the volume of complex goaf.