摘要
岩体稳定性一直是矿山开采的重点关注问题,对岩体工程质量和稳定性做出正确评价,是岩体开挖、支护设计、回采设计及保障生产安全必不可少的前提条件。以某铁矿工程地质条件为背景,首先采用结构面数字识别系统ShapeMetriX 3D对井下岩体进行结构面调查分析,包括结构面倾向、倾角、线密度、结构面条数、体密度等;再对岩石试件进行力学实验测试,得出单轴饱和抗压强度、弹性模量、泊松比、黏聚力、内摩擦角等;在此基础上采用BQ分级标准,对矿岩质量进行分级和稳定性评价。结果表明,该铁矿首采区矿岩稳定性级别以Ⅴ级为主,其次是Ⅳ级,整体稳定性较差。研究结果可为矿山采矿方法选择及采场结构参数优化提供基础数据,为矿山安全开采提供保障。
Rock mass stability has always been a key concern in mining.Correct evaluation of rock mass engineering quality and stability is an indispensable prerequisite for rock mass excavation,support design,mining design and production safety.Taking the engineering geological conditions of an iron ore as the background,the structural plane digital identification system ShapeMetriX 3D is used to investigate and analyze the structural plane of the underground rock mass,including the structural plane inclination,dip angle,linear density,number of structural planes,and volume density.The rock specimens were then tested by mechanical experiments,and the uniaxial saturated compressive strength,elastic modulus,Pois⁃son's ratio,cohesion,and internal friction angle were obtained.On this basis,the BQ grading standard is used to classify the rock quality and evaluate the stability.The results show that the stability of the ore rock in the first mining area of the iron ore is mainly V,followed by IV,and the overall stability is poor.The re⁃search result can provide basic data for mine mining method selection and stope structure parameter optimi⁃zation,and provide guarantee for mine safety mining.
作者
郭斌
王立杰
王福全
张素娜
杨金光
GUO Bin;WANG Lijie;WANG Fuquan;ZHANG Suna;YANG Jinguang(Shahe Zhongguan Iron Mine Co.,Ltd.,Hebei Iron and Steel Group)
出处
《现代矿业》
CAS
2022年第4期207-210,共4页
Modern Mining
关键词
节理裂隙
BQ分级标准
岩体质量分级
joint fissure
BQ classification standard
rock mass quality classification
