3D laser scanning technology

with its high precision

non-contact

and efficient data collection capabilities

has become one of the important tools for engineering geological investigations.In complex geological environments such as mines and hydraulic engineering

this technology relies on point cloud data to construct 3D models

significantly enhancing the efficiency and safety of tasks such as detecting mining voids and monitoring dam cracks.This paper systematically analyzes the application process of 3D laser scanning technology

including data collection

preprocessing

model construction

and accuracy validation

and demonstrates its practical application effects in scenarios such as modeling of voids and monitoring of dam deformation through case studies.However

this technology still faces three core challenges:low data processing efficiency

insufficient environmental adaptability of equipment

and lack of standardized implementation in engineering.In the future

research and development should focus on algorithm innovation

multi-sensor fusion

upgrading underground navigation systems

and the construction of industry standards to promote its comprehensive application in engineering geological investigations.