超高水原位充填浆体流动性参数研究与应用  

Study on flowability parameters and on-site application of in-situ filling ultra-high water slurry

作　　者：马秋峰 刘国磊[1] 董晓勇 李庆国 何国志 崔嵛[1] 田静 MA Qiufeng;LIU Guolei;DONG Xiaoyong;LI Guoqing;HE Guozhi;CUI Yu;TIAN Jing(School of Resources and Environmental Engineering,Shandong University of Technology,Zibo 255000,China;Tianchen Coal Mine,Zaozhuang Mining Group Co.,Ltd.,Zaozhuang 277519,China;Shandong Coal Technology College,Shandong Energy Group,Zibo 255120,China)

机构地区：[1]山东理工大学资源与环境工程学院,山东淄博255000 [2]枣庄矿业(集团)有限责任公司田陈煤矿,山东枣庄277519 [3]山东能源集团山东煤炭技术学院,山东淄博255120

出　　处：《煤炭工程》2024年第11期61-67,共7页Coal Engineering

基　　金：国家自然科学基金(51904178,52474104);山东省自然科学基金博士基金项目(ZR2018BEE009)。

摘　　要：为了探究超高水材料原位充填管路系统设计中水力坡度和临界流速两个关键参数,对现有模型进行修正,以甲料为研究对象,利用室内水力实验探究不同倾角、质量浓度条件下甲料浆的实际水力坡度和临界流速,利用最小二乘法进行参数估计并对模型的准确性进行探究,并以鲁西南地区田陈煤矿7105老巷原位充填为背景进行工程检验,研究结果表明:随着倾角的增大水力坡度逐渐增大,倾角影响系数α与管路倾角近似满足线性关系,临近流速修正系数β同时受到倾角和浓度的影响,浓度越大、倾角越大,临界流速越大;利用实验数据得到α、β拟合公式并带入修正模型,水力坡度模型预测结果误差在10%以内,临界流速模型预测结果误差在5%以内;基于两个关键参数设计的现场充填管路系统通畅,未出现淤积堵管现象和管路磨损现象,证明了水力坡度修正模型和临界流速修正模型在实践应用中的可行性。In order to explore the two key parameters of hydraulic gradient and critical flow rate in the design of in-situ filling pipeline system,the existing hydraulic gradient and critical flow rate models were modified.Taking material A as the research object,indoor hydraulic tests were conducted to investigate the actual hydraulic gradient and critical flow rate of material A slurry under different inclinations and mass concentrations.The parameters were estimated,and the accuracy of the model was explored.The engineering inspection was conducted based on the in-situ filling of No.7105 abandoned roadway in Tianchen Coal Mine in southwestern area of Shandong Province.The research results indicate that:as the inclination angle increases,the hydraulic gradient gradually increases,and the inclination angle influence coefficientαhas approximate linear relationship with the inclination angle of the pipeline.The near flow velocity is influenced by both the inclination angle and concentration,and the higher the concentration and inclination angle,the greater the critical flow velocity.α、βfitting formula,obtained from experimental data,is incorporated into the correction model.The error of the hydraulic gradient model results is within 10%,and the error of the critical flow velocity is within 5%.The on-site filling pipeline system designed based on two key parameters is unobstructed,and there is no siltation or severe wear of the pipeline,proving the feasibility of hydraulic gradient and critical flow rate in practical applications.

关 键 词：原位充填 水力坡度 临界流速 老空区治理 超高水材料 

分 类 号：TD823[矿业工程—煤矿开采]