煤基固废充填料浆长距离输送悬浮态稳定性研究  

Study on suspension state stability of coal-based solid waste filling slurry of long-distance pipeline transportation

作　　者：李涛[1,2] 杨涛[1,2] 刘金成 刘子健 杨天阳 LI Tao;YANG Tao;LIU Jincheng;LIU Zijian;YANG Tianyang(School of Mine Safety,North China Institute of Science and Technology,Sanhe 065201,China;Key Laboratory of Mine Filling and Safe Mining of National Mine Safety Administration,North China Institute of Science and Technology,Sanhe 065201,China;Tangshan Mining Company,Kailuan(Group)Limited Liability Corporation,Tangshan 063000,China)

机构地区：[1]华北科技学院矿山安全学院,河北三河065201 [2]华北科技学院矿山充填安全开采国家矿山安全监察局重点实验室,河北三河065201 [3]开滦(集团)有限责任公司唐山矿业分公司,河北唐山063000

出　　处：《煤炭科学技术》2025年第2期444-456,共13页Coal Science and Technology

基　　金：河北省自然科学基金杰出青年科学基金资助项目(E2023508019);河北省高等学校科学研究资助项目(QN2025231);中央高校基本科研业务费资助项目(3142023007)。

摘　　要：煤矿煤基固废充填开采技术是实现煤炭绿色低碳开采的重要代表性技术,煤基固废料浆充填采空区可有效控制顶板岩层运移,防止衍生灾害发生。针对煤矿智能化大型化发展趋势下,煤基固废充填料浆长距离管道输送中颗粒悬浮态敏感性强易导致浆体浓度不稳定而堵爆管的问题,开展浆体悬浮态稳定性方面的研究,旨在减少煤基固废长距离充填开采中堵爆管事故的发生。首先,应用正交试验、极差分析、方差分析与显著性检验法,评价影响煤基固废充填料浆流变特性的主次因素与影响显著性,得出主次影响因素的排序为料浆>水泥掺量>粉煤灰掺量,各因素影响显著性的排序为料浆浓度>水泥掺量>粉煤灰掺量。确定煤基固废充填料浆的质量分数为75.2%,各因素的最优配比为水泥∶粉煤灰∶煤矸石∶水质量比为12∶19.5∶43.7∶24.8。其次,建立煤基固废充填料浆长距离管道输送基于固液二相载体悬浮液的固体颗粒沉降模型,通过临界不沉粒径力学模型计算、粒度筛分试验、流变特征参数测试,确定固液二相载体悬浮液的密度为1 626.82 kg/m^(3),判别煤基固废充填料浆为非稳定浆体,不具备长距离管道输送的经时悬浮态稳定性。最后,确定使煤基固废充填料浆转变为悬浮态稳定浆体的悬浮临界屈服应力与悬浮临界塑性黏度分别为172.87 Pa、2.39 Pa·s,提出通过添加悬浮剂建立煤基固废充填料浆长距离管道输送稳定浆体体系的方法,以期解决煤矿煤基固废长距离充填开采工程实践问题。The coal-based solid waste filling mining technology is a significant representative technology for achieving green and low-car-bon coal mining.Filling the goaf with coal-based solid waste slurry can effectively control the movement of roof strata and prevent de-rived disasters.The research is conducted on the stability of slurry suspending state,in response to the issue of strong sensitivity of particle suspension in long-distance pipeline transportation of coal-based solid waste filling slurry,which can easily lead to unstable slurry concen-tration then pipeline blockage or bursts,under the developing trend of intelligent and large-scale coal mining.The aim is to reduce pipe blockage and burst accidents of long-distance filling mining of coal-based solid waste.Firstly,by applying orthogonal experiments,range analysis,variance analysis,and significance tests,the primary and secondary factors influencing the rheological properties of coal-based solid waste filling slurry and their significance are evaluated.The order of primary and secondary influencing factors is determined as slurry concentration>cement addition>fly ash addition,and the order of effect significance is slurry concentration>cement addition>fly ash addition.The mass concentration of coal-based solid waste filling slurry is determined to be 75.2%,with the optimal ratio of ce-ment∶fly ash∶coal gangue∶water as 12∶19.5∶43.7∶24.8.Secondly,a model for solid particle sedimentation based on the solid-li-quid two-phase carrier suspension fluid is established for long-distance pipeline transportation of coal-based solid waste filling slurry.The density of the solid-liquid two-phase carrier suspension fluid is determined to be 1626.82 kg/m^(3),through the calculation of critical non-set-tling particle diameter mechanical model,granularity screening experiment,and rheological characteristic parameter test.The coal-based solid waste filling slurry is identified as an unstable slurry,lacking long-term suspension stability for long-distance pipeline

关 键 词：长距离输送 悬浮态稳定性 沉降模型 固液二相载体悬浮液 悬浮临界值 

分 类 号：TD823[矿业工程—煤矿开采]