Studies On Application Of Three Dimensional Laser Scanning In Information Extraction Of Jointed Rock Masses

Rock mass structural plane is planar geological interface developed in the rock mass with different directions, sizes and forms. Structure plane can play a key role for the strength, deformation, seepage and stability of the rock mass in mining engineering and slope engineering.Therefore, the geometric parameter statistics of structural plane is an important geological survey work in the rock mass engineering. Traditional human method of measurement is time consuming, laborious and dangerous to the safety of the surveyors. Drilling method needs high quality on pore-forming. This method, that does not reflect the occurrence information of large structural plane and also cannot guarantee accuracy of interpretation. Close-range photogrammetric method won the attention of many scholars at home and abroad. This method collects information of structural planes does not need to reach the targets, and it also can get structure information of rock mass all sidedly. Close-range photogrammetric method uses complex mathematical formulas and it has the characteristics of high precision. But there are many factors influencing the measurement accuracy, such as the stability errors of digital cameras, image distortion, exterior orientation errors of the camera and factors in working environment.Starting collecting and solving problem after providing3D laser scanning technology to investigate joint. First of all, to clear the data type of3D laser scanning is point cloud coordinates. Secondly, identifying joint planes, extracting joint information in the form of point coordinates. Next, we write software to calculate and organize information of the point cloud to translate3D coordinates information into inclination and dip angle information. Writing stored functions, then to store the results. Finally, the connection between data of point cloud and the written program enables one-click import and export data to improve efficiency. After the data processing has been completed, we turn to compare and analysis the experimental results. Then apply the Dips software to research manual measurements and Z+F measurements. Finally confirming scheme is advanced, feasible and reasonable, and providing a basis for further promotion of the new technologies in the future.In the modern large engineering, the traditional structural planes measuring method often gets into trouble. Measurement of3D laser scanning technology is different from traditional methods, it can get a lot of spacial point cloud data without touching the target, fast, high-precision in the rock surface, and enables the automatic identification of structural plane and statistics of the structural planes parameters possible. Article based on3D laser scanning data studies on identification methods of rock mass structural planes and the achievements are as follows:(1) Using the Z+F produced by Germany Zoller Frhlich company to collect the field data, and processing point cloud data by coordinate transformation, cloud stitching, noise reduction, etc.(2) Developing calculation program of rock mass structural planes by Java, and realizing the capabilities of extracting structural planes, compute and storage.(3) Liaoning Fushun HongTouShan copper mine is our experimental field, practice has proved that the system is useful, convenient and efficient.(4) Measurement of three dimensional laser scanning technology to replace traditional human measurement, enabling automatic non-contact quick measurement, reducing the work time and workload greatly.