摘要
以福建某离子型稀土矿为研究对象,通过现场取原状矿样分析了矿体干密度的空间变异性。运用GEO软件建立模型,分析了矿体干密度对临界注液强度的影响。结果表明:矿体干密度在不同深度均具有中等以上的空间相关性,当取样深度由2m增加到11m时[1],等效干密度先快速增大后趋于稳定;矿体干密度由1.35g/cm^3增加到1.59g/cm^3时,临界注液强度由2m^3/m^2d下降到0.38m^3/m^2d;考虑矿体干密度空间变异性的临界注液强度为0.2m^3/m^2d,与实际临界注液强度的差值为0.05m^3/m^2d,不考虑矿体干密度空间变异性的临界注液强度为0.38m^3/m^2d,与实际临界注液强度的差值为0.13m^3/m^2d,说明在进行临界注液强度计算时必须考虑矿体干密度的空间变异性。
It’s of great significance to determine the critical injection strength of ionic-type rare earth ore for controlling geological disasters such as mine landslides.Taking an ionic-type rare earth ore in Fujian Province as the research object,the spatial variability of the dry density of the ore body was studied by the way of on-site sampling.The mine model was established by GEO software,and the influence of the dry density of the ore body on the critical injection strength was analyzed.Moreover,the necessity to take the spatial variability of the dry density of the ore body to consideration was specified when calculating the critical injection strength.The results showed that the dry density of ore body at different depths had spatial correlation higher than medium grade.When the sampling depth was increased from 2 mto 11 m,the equivalent dry density firstly increased and then stabilized.When the dry density of ore body was increased from1.35 g/cm^3 to 1.59 g/cm^3,the critical injection strength was reduced from 2 m^3/m^2 d to 0.38 m^3/m^2 d.Considering the spatial variability of the dry density of the ore,the critical injection strength was 0.2 m^3/m^2 d and the difference with the actual injection strength was 0.05 m^3/m^2 d.The critical injection strength was 0.38 m^3/m^2 d without the consideration of the spatial variability of the dry density of the ore body,and the difference was 0.13 m^3/m^2 d,compared with the actual injection strength.Thus,it verified the necessity to consider the spatial variability of the dry density of the ore body in the calculation of the critical injection strength.
作者
南亚
胡世丽
洪本根
王钰霖
姚康
NAN Ya;HU Shili;HONG Ben’gen;WANG Yulin;YAO Kang(School of Architectural and Surveying Mapping Engineering,Jiangxi University of Science and Technology,Ganzhou,Jiangxi 341000,China;School of Resources and Environmental Engineering,Jiangxi University of Science and Technology,Ganzhou,Jiangxi 341000,China)
出处
《矿业研究与开发》
CAS
北大核心
2020年第4期67-73,共7页
Mining Research and Development
基金
国家自然科学基金资助项目(41602311,51874147,51664015)
江西理工大学清江人才项目(JXUSTQJBJ2016007)。
关键词
离子型稀土矿
干密度
空间变异性
等效干密度
临界注液强度
Ionic-type rare earth ore
Dry density
Spatial variability
Quivalentdry density
Critical injection strength
