三维激光扫描监测开采沉陷的精度分析

Precision Analysis of 3D Laser Scanning to Monitor Mining Subsidence

为了克服传统地表沉陷观测时间长、工作量大、观测费用高、测点难以保护等缺点,采用三维激光扫描现代化测绘新技术,对高强度长壁综采放顶煤开采引起的地表沉陷盆地进行了现场三维激光扫描观测。通过对三维激光扫描观测数据的处理,并与传统地表移动观测站的结果进行对比分析,建立了高强度开采地表下沉陷盆地的三维数字高程模型。结果表明:三维激光扫描技术能够快速高效地获取整个下沉盆地的沉陷数据,所测的中误差为0.012 7 m,应用于煤矿地表沉陷的观测是可行的。同时在开采沉陷数据采集效率、速度等方面具有明显的优势,具有较好的推广应用前景。

In order to overcome the disadvantages such as long time surveying,large workload,high cost and difficulties in surveying points protection of the conventional surface movement surveying method,the surface subsidence basin due to high-intensity longwall caving min-ing was scanned and studied by use of 3D laser scanning technology. According to the data analysis of 3D laser scanning and comparison with the conventional surface movement surveying method,the 3D digital elevation model of the surface subsidence basin due to high-in-tensity coal mining was set up.The results showed that the 3D laser scanning technology could obtain the whole surface subsidence basin data high efficiently and rapidly and the root mean square error was 0.012 7 m,it was feasible to monitor the surface subsidence basin.With the efficient data collection velocity of this technology,it has preferable application and generalization prospects in mining subsidence data monitoring.