煤矸石粉-煤泥覆岩离层注浆充填材料性能研究
Study on Overburden Rock Layer Separation Grouting and Filling Material Performance of Coal Gangue Powder-Coal Slime
韩磊 1许起 2张逸群1
作者信息
- 1. 山煤国际能源集团股份有限公司,山西 太原 030000
- 2. 山西霍尔辛赫煤业有限责任公司,山西 长治 046602
- 折叠
摘要
为确保注采比和保障地表减沉效果,霍尔辛赫煤业拟采用煤矸石粉-煤泥混合浆液进行覆岩离层注浆充填开采,通过正交实验获得了煤矸石粉-煤泥覆岩离层注浆充填材料的浆液密度、流动度、黏度、自由析水率和压实析水率等工作性能,研究煤矸石粉-煤泥质量比、水灰比对其浆液工作性能的影响,确定了其浆液最优配比.结果表明:水灰比一定时,随着煤矸石粉-煤泥质量比增大,浆液密度、黏度增大,流动度收缩,自由析水率和压实析水率降低;煤矸石粉-煤泥质量比一定时,随着水灰比增大,浆液密度、黏度减小,流动度延展,自由析水率和压实析水率提高;质量比 70:12、水灰比 0.8 以及质量比 65:12、水灰比 0.7 的煤矸石粉-煤泥浆液适用于覆岩离层注浆充填.
Abstract
In order to ensure the injection production ratio and guarantee the surface subsidence re-duction effect,Huoerxinhe Coal Industry plans to use a mixed slurry liquid of coal gangue pow-der-coal slime for oveburden rock layer separation grouting and filling mining.Through orthogonal experiments,the working performance such as the slurry liquid density,fluidity,viscosity,free water separation rate,compacted water separation rate and others of the coal gangue powder-coal slime overburden rock layer separation grouting and filling material are obtained.The influence of the coal gangue powder-coal slime mass ratio and water cement ratio on the working performance of its slurry liquid is studied,and its slurry liquid optimal ratio is determined.The results show that when the water cement ratio is constant,as the coal gangue powder-coal slime mass ratio increases,the density and viscosity of the slurry liquid increase,the fluidity shrinks,and the free water separation rate and compacted water separation rate decrease;When the coal gangue powder-coal slime mass ratio is constant,as the water cement ratio increases,the density and viscosity of the slurry liquid decrease,the fluidity extends,and the free water separation rate and compacted water separation rate increase;Coal gangue powder-coal slime slurry liquid with a mass ratio of 70:12,a water cement ratio of 0.8,and a mass ratio of 65:12,a water cement ratio of 0.7 are suitable for overbur-den rock layer separation grouting and filling.
关键词
离层注浆材料/煤基固废/浆液性能/充填治理/适用配比Key words
layer separation grouting material/coal based solid waste/slurry liquid performance/filling governance/applicable ratio引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据