地质三维建模技术及其在抽水蓄能电站的应用

Application of 3D Geological Modeling in Pumped Storage Power Station

地质三维建模是实现地质工作数字化的关键环节,地质三维建模技术的优劣直接影响地质三维成果质量和工程应用深度。本文系统研究国内外地质三维建模技术发展历程及地质建模核心算法DSI的特点,总结基于DSI插值算法的三维地质建模软件CnGIM在桐城抽水蓄能电站工程的应用经验。在此基础上,分析探讨CnGIM在抽水蓄能电站的深化应用前景。结论为:DSI插值算法是最适合地质三维建模的底层算法,能够真正实现任意复杂地质体建模;CnGIM软件具备复杂地质条件下的三维建模能力,并可用于电站围岩质量分级和块体稳定性评价等工作,提升电站勘察设计阶段数字化应用水平;施工期,采用云、互联网等技术,快速完成新揭露地质信息的编录、传输和处理,在地质三维模型平台上快速实现勘察数据更新和再加工,以此开展施工期围岩动态失稳预测,有助于提高施工期地下工程块体稳定性分析的可靠性和准确性,减少施工期安全事故。

Geological 3D modeling is a key link to realize the digitization of geological work.The quality of geological 3D modeling technology directly affects the quality of geological 3D results and the depth of engineering application.This paper systematically studies the development history of geological 3D modeling technology at home and abroad and the characteristics of the core algorithm of geological modeling DSI,and summarizes the application experience of the 3D geological modeling technology CnGIM based on the DSI algorithm in the Tongcheng pumped storage power station project.On this basis,the application prospect of CnGIM in pumped storage power station is discussed.The conclusions are as follows:(1)DSI algorithm is the most suitable underlying algorithm for 3D geological modeling,and can truly realize the modeling of any complex geological body;(2)CnGIM software has the ability of 3D modeling under complex geological conditions,and can be used for analysis and evaluation work such as rock quality classification and block stability evaluation,which will improve the level of digital application in the survey and design stage of the power station;(3)During the construction period,the cloud,Internet and other technologies are used to quickly complete the cataloguing,transmission and processing of newly revealed geological information,and quickly realize the update and reprocessing of survey data on the geological three-dimensional model platform,so as to carry out the dynamic instability prediction of the surrounding rock during the construction period,which helps to improve the reliability and accuracy of the stability analysis of the underground engineering block during the construction period and reduce the safety accidents during the construction period.