基于FLAC3D的石灰岩矿区岩溶塌陷数值模拟研究  

Numerical Simulation of Karst Collapse in Limestone Mining Areas Based on FLAC3D

作　　者：杨泽宇 林丽萍 李碧海[1] Yang Zeyu;Lin Liping;Li Bihai(Hunan Urban Construction College,Xiangtan,China)

机构地区：[1]湖南城建职业技术学院,湖南湘潭

出　　处：《科学技术创新》2024年第22期33-36,共4页Scientific and Technological Innovation

基　　金：湖南省教育厅科学研究项目“基于FLAC3D和GIS技术的岩溶塌陷机理与防治研究”(22C0767)。

摘　　要：矿区为露天凹陷式开采的石灰岩建材矿山,随着矿山开采以及地下水抽排,导致矿坑周边岩溶塌陷大量产生,严重影响矿山安全生产和周边群众生产生活。利用FLAC3D技术、天然电场选频法勘探和地质综合分析掌握岩溶塌陷发生机理和分布规律,研究结果表明矿坑东侧、北侧和南侧断裂构造发育;矿山生产抽排地下水以及采矿爆破引起真空吸蚀、流水潜蚀导致矿坑周边岩溶塌陷;基于FLAC3D技术矿区岩溶塌陷数值模拟分析,数值模拟结果与地质分析、物探结论和塌陷现状基本一致。研究结果为后期岩溶塌陷的防治提供了科学依据。The mining area is a limestone building materials mine with open-pit depression mining.With the mining and groundwater pumping,a large number of karst collapses are generated around the mine,seriously affecting the safety production of the mine and the production and life of the surrounding residents.Using FLAC3D technology,natural electric field frequency selection method exploration,and geological comprehensive analysis to grasp the mechanism and distribution law of karst collapse,the research results show that fault structures are developed on the east,north,and south sides of the mine pit;Mining production drainage of groundwater and mining blasting causing vacuum suction and water seepage leading to karst collapse around the mine pit;Based on FLAC3D technology,numerical simulation analysis of karst collapse in mining areas is conducted,and the numerical simulation results are basically consistent with geological analysis,geophysical exploration conclusions,and the current situation of collapse.The research results provide scientific basis for the prevention and control of karst collapse in the later stage.

关 键 词：FLAC3D技术 岩溶塌陷 天然电场选频法勘探 石灰岩建材矿山 

分 类 号：P642.25[天文地球—工程地质学]