关键词: 采空区, 三维激光扫描系统, 多站扫描, 地理坐标定位

Abstract: In view of the problems such as difficulty in equipment moving，high requirements for measuring environment and the complicated process of the equipment installment and remove that exist in the process of georeferenced coordinate setting of goaf by using the existing three-dimensional scanning system，the georeferenced coordinate positioning principle and coordinate positioning method of the three-dimensional scanning system under the complicated environment of mine goaf are researched.A portable，concise and efficient coordinate positioning method based on tripod support is introduced.A field test plan is designed so as to verify the data processing precision of the method，besides that，the new coordinated positioning method is adopted to conduct field accurate detection on mine goaf.The research results show that:①the spatial locations of the data model obtained by the new coordinate positioning method have good alignment with that by the existed coordinate positioning method.The volume differences between both models is very small，which can be neglected within the scope of engineering precision；The engineering precision of the new coordinate positioning method based on the tripod support is basically identical to that of the existed coordinate positioning method；②based on the detection data obtained by using the new coordinate positioning method，the accurate three-dimensional model of goaf is established，which can provide valuable reference data for mine goaf governance.The above research further show that，the new georeferenced coordinate positioning method based on tripod support has the advantages of easily handling，assembly and disassembly，and it is good for solving the existing problems of coordinate positioning method and improving the efficiency of the three-dimensional scanning on cavity.

Key words: Goaf, Three-dimensional laser scanning system, Multi-station scanning, Georeferenced coordinate positioning