胶结充填体与矿石的能量匹配关系及固化时间的确定  

Energy matching relationship between cemented backfill body and ore and determination of curing time

作　　者：李长洪[1] 魏晓明[1] 张立新[2] 周小龙[1] 王晓南[2] 徐敏[2] 

机构地区：[1]北京科技大学土木与资源工程学院,北京100083 [2]五矿邯邢安徽开发矿业有限公司,安徽六安237426

出　　处：《采矿与安全工程学报》2017年第6期1116-1121,共6页Journal of Mining & Safety Engineering

基　　金：国家"十二五"科技支撑计划项目(2013BAB02B08);北京市重点学科共建项目

摘　　要：通过对不同灰砂比和料浆浓度的胶结充填体的单轴抗压强度与养护时间的分析,分别建立了胶结充填体固化强度与养护龄期之间的正相关数学表达式。在空场采矿嗣后充填法中,引入能量匹配系数K表征胶结充填体的变形比能与矿石回采释放比能的关系,获得了K值与矿石的弹性模量、垂直应力与充填体固结强度的关系,以及K值与胶结充填体固化时间的关系。据此,定量分析二步骤矿石回采的开挖时间。针对李楼铁矿实例,确定了料浆浓度为75%,灰砂配比为1∶8的充填体,固化时间42 d,比原设计提前18 d。Through analyses of the uniaxial compressive strength and the curing time of cemented backfill body for various cement-tailing ratios and slurry concentrations, positive correlation mathemat-ical expressions between the strength of cemented backfill body and the curing age are established. The energy matching coefficient K is introduced to show the energy density relationship between the backfill body deformation and the ore excavation at the open stope with the subsequent filling method, which obtain relationships between the K coefficient and elastic modulus of ore, the vertical stress, the curing strength of cemented backfill and the curing time of cemented backfill body. Based on that, the exca-vated time in the second step is quantitatively analyzed. The slurry concentration of 75% and ce-ment-tailing ratio of 1：8 and 42 days curing time are selected for the engineering application of Lilou iron mine, which shorts the curing age by 18 d than original design.

关 键 词：胶结充填体 固化强度 矿岩回采 能量匹配分析 

分 类 号：TU45[建筑科学—岩土工程]