三山岛金矿海边地下开采矿山稳定性的数值模拟分析  

NUMERICAL SIMULATION OF THE MINING AREA STABILITY OF SANSHANDAO GOLD MINE

作　　者：刘竹华[1] 盛祝平 姚宝魁 杨家录 

机构地区：[1]中国科学院地质研究所,华北水电学院

出　　处：《工程地质学报》1996年第2期24-30,共7页Journal of Engineering Geology

摘　　要：本文用数值模拟的分析方法，评价了三山岛金矿地下开采引起的开采效应及地表下沉盆地的变形特征。结果表明，矿山地表是稳定的，上部一期工程开采引起的地表最大下沉量不超过７００ｍｍ，深部开挖时不超过９９５ｍｍ左右；在采场充填的情况下，地表下沉值将降低５５％左右；由于矿山地表变形较小，加之覆盖层第四纪中存在着两层总厚度８～１２ｍ的隔水粘水层，因此不致沟通地表水与井下的直接联系而危及矿山的安全。In this paper the mining effect caused by undergroud mining and deformation characteristics of the land subsidence basin are evaluated by using numerical simulation method. The maximum land subsidence caused by the first-term excavation is less than 700 mm, the maximum subsidence caused by the second-term deep excavation will not be larger than 995mm. If back-filling in the stopes is used, the maximum subsidence will be reduced by 55%. Because the relative defferential subsidence deformation of the land surface is less than 1mm. m-1, and there exist two overlying impermeable clay layers (thickness from 3～5 m to 5～7 m, respectively), such deformation of the land surface will not destroy the continuity of clay layers and not provide any path for surface water (seawater) to harm the safety of the mine.

关 键 词：金矿 采矿 数值模拟 开采效应 地表变形 稳定性 

分 类 号：TD325.1[矿业工程—矿井建设] TD863