摘要
本文借助Rhino建模软件对柿树底金矿区域三维地质建模,利用FLAC3D对柿树底金矿拟开采矿体进行了多中段开采方案的可行性研究,依据《河南中矿能源有限公司嵩县柿树底金矿地下开采扩建项目初步设计》中的生产规模,设计了两个多中段开采方案进行开挖→充填模拟,经数值模拟分析发现,方案一、方案二开采充填过程对地表产生的沉降扰动非常微弱,几乎不受影响;两个中段同时开挖结束后,充填体顶板围岩竖直方向产生的最大位移量为-2.85×10^(-2)m;三个中段同时开挖结束后,充填体顶板围岩竖直方向产生的最大位移量为-4.35×10^(-2)m。开挖→充填结束后,应力重新达到新的平衡,充填体顶板围岩的最大主应力主要受拉张应力,其最大值未超过围岩的拉张屈服强度,最小主应力以压应力为主,作用于充填体,致使其产生剪切塑性应变区域,其余部位仅产生局部的剪切、拉张塑性应变区,并未形成大面积且贯穿性的塑性应变区域,故而在充填法开采的前提下,充填体围岩基本稳定,方案一、方案二所设计的开采方案基本可行,但从位移角度来看,方案一更有利于地表稳定和采场安全。
In this paper,three-dimensional geological modeling was carried out in the Shizhu bottom gold mine area with the help of Rhino modeling software,and feasibility study of multi-section mining scheme was carried out in the Shizhu bottom gold mine with FLAC3D.Two multi-section mining schemes were designed for excavationfilling simulation according to the production scale in the Preliminary Design of Shizhu Bottom.The settlement disturbance caused by the mining and filling process of the first and second schemes is very weak and almost unaffected.After the excavation of two middle sections at the same time,the maximum displacement in the vertical direction of the backfill roof surrounding rock is-2.85×10^(-2)m.After the excavation of three middle sections at the same time,the maximum displacement in the vertical direction of the surrounding rock of the backfill roof is-4.35×10^(-2)m.After excavation→filling,the stress reaches a new balance again.The maximum principal stress of the surrounding rock of the backfill roof is mainly affected by the tensile stress,and its maximum value does not exceed the tensile yield strength of the surrounding rock.The minimum principal stress is mainly compressive stress,which acts on the backfill body,resulting in shear-plastic strain zone,while the remaining parts only produce local shear-plastic strain zone.No large and penetrating plastic strain area has been formed,so under the premise of filling mining,the surrounding rock of the filling body is basically stable,and the mining schemes designed in Scheme 1 and Scheme 2 are basically feasible,However,from the perspective of displacement,scheme I is more conducive to surface stability and stope safety.
作者
王雄雄
马冰洁
张红伟
WANG Xiongxiong;MA Bingjie;ZHANG Hongwei
出处
《中国矿山工程》
2024年第4期26-31,82,共7页
China Mine Engineering
关键词
RHINO
三维建模
开挖
充填法
rhino
three-dimensional modeling
excavation
filling method
numerical simulation
