复杂破碎矿体采矿方法研究及提产优化实践  

RESEARCH ON MINING METHOD OF COMPLEX BROKEN ORE BODY AND PRACTICE OF YIELD OPTIMIZATION

作　　者：王庆刚 王社光 连欢超 于兴社 马宁 杨志强 Wang Qinggang;Wang Sheguang;Lian Huanchao;Yu Xingshe;Ma Ning;Yang Zhiqiang(HBIS Group Shahe Zhongguan Iron Mine Co.,Ltd.,Xingtai 054100,Hebei;Hebei Provincial Technology Innovation Center for Low-Carbon,Intelligent and Iifficient Mining of Iomplex Iron Ore,Xingtai 054100,Hebei)

机构地区：[1]河北钢铁集团沙河中关铁矿有限公司,河北邢台054100 [2]河北省复杂铁矿低碳智能高效开采技术创新中心,河北邢台054100

出　　处：《河北冶金》2024年第8期41-46,54,共7页Hebei Metallurgy

摘　　要：复杂破碎矿体难以实现安全高效回采,其采矿方法的选择仍是当今采矿技术的难题。本文以某铁矿复杂破碎采场为背景,进行采场结构参数数值模拟及提产布局协同技术研究。首先进行岩体结构面调查分析和岩石试件点荷载强度测试,进行岩体稳定性分级;其次在岩体质量分级的基础上,基于Mathew稳定图表法,在综合考虑采准工程和采场顶板与侧帮稳定性的基础上,获得采场允许暴露的结构参数:当宽度为10~18 m时,采场最大允许暴露长度为30~60 m;当采场高度小于30 m时,采场最大允许暴露长度为30~50 m;当高度大于30 m时,采场最大允许暴露长度为45~60 m。在此基础上,提出25种不同开采方案,采用FLAC3D对采场结构参数进行数值模拟优化,通过采场顶板和侧帮位移、应力、塑性区对比分析等,结合开采实际,提出在南部地质条件相对较好区域推行预控顶大直径深孔采矿法,较为破碎的北部区域采用预控顶中深孔落矿分段凿岩采矿法,并不断进行提产布局及排产优化,顺利实现设计产能。It is difficult to realize safe and efficient mining of complex broken ore bodies,and the selection of mining methods is still a difficult problem in current mining technology.Based on the background of complex broken stope in an iron mine,numerical simulation of structural parameters and collaborative technology of production enhancement layout are carried out in this paper.Firstly,the rock mass structural plane investigation and analysis and rock specimen point load strength test are carried out to grade the rock mass stability.Secondly,on the basis of rock mass quality classification,based on Mathew stability chart method.Based on the comprehensive consideration of mining engineering and the stability of stope roof and side wall,it obtains the allowable exposed structural parameters of the stope.When the width is 10~18 m,the maximum allowable exposure length of the stope is 30~60 m.When the stope height is less than 30 m,the maximum allowable exposure length of the stope is 30~50 m.When the height is greater than 30 m,the maximum allowable exposure length of the stope is 45~60 m.On this basis,25 different mining schemes are proposed,and numerical simulation optimization research on stope structural parameters is carried out by using FLAC3D.Through comparative analysis of displacement of stope roof and side wall,comparative analysis of stress,comparative analysis of plastic zone,etc.,combined with mining practice,it is proposed to implement pre-controlled roof large-diameter and deep-hole mining method in the southern region with relatively good geological conditions.In the more fractured northern region,the pre-controlled top medium-deep hole mining sublevel drilling mining method is adopted,and the production lifting layout and scheduling optimization are constantly carried out to successfully achieve the designed production capacity.

关 键 词：复杂破碎矿体 岩体质量分级 数值模拟 采矿 应力 塑性区 

分 类 号：TD861.1[矿业工程—金属矿开采]