三维激光扫描技术在沉陷监测中应用问题探讨

Discussion on application of 3D laser scanning technology to ground subsidence monitoring

为了研究三维激光扫描在沉陷监测中应用的可行性、监测精度以及参与求参点的密度,采用三维激光扫描仪对开采引起的地表沉陷进行了观测,得到了整个区域的下沉值,通过设置部分固定测点,得到水平移动值。对这些数据,基于概率积分模型,使用非线性最优化方法求取了参数。研究结果表明:三维激光扫描可以应用于沉陷监测,获取沉陷盆地;监测精度可以达到毫米级,满足沉陷监测的要求;当采样间隔与采深之比达到2%时,即可求得稳定的与下沉值相关的参数,通过在工作面4个角点分别设置2~3个固定测点可获得水平移动系数。

In order to study the feasibility,the monitoring and measuring accuracy and the density of points used for the getting parameters of the 3D laser scanning applied to the subsidence monitoring and measurement,the surface ground subsidence occurred by the coal mining were observed and measured with the 3D laser scanner.The subsidence values of the completed area were obtained.With the partial fixed measuring points setting,the horizontal displacement values were obtained.Base on the probability integral model...