矸石粉替代粉煤灰膏体充填材料性能研究  

Performance of paste filling material with gangue powder replacing fly ash

作　　者：李新旺 温学君[1] 程立朝 张学栋 王汉青[1] LI Xin-wang;WEN Xue-jun;CHENG Li-chao;ZHANG Xue-dong;WANG Han-qing(School of Mining Geomatics Engineering,Hebei University of Engineering,Handan 056038,China;Coal Resources Development and Construction Application Technology Research Center of Universities in Hebei Province,HebeiUniversity of Engineering,Handan056038,China)

机构地区：[1]河北工程大学矿业与测绘工程学院,河北邯郸056038 [2]河北工程大学河北省高校煤炭资源开发与建设应用技术研发中心,河北邯郸056038

出　　处：《煤炭工程》2023年第1期136-142,共7页Coal Engineering

基　　金：河北省自然科学基金资助项目(生态智慧矿山联合基金项目)(E2020402075);河北省自然科学基金项目(E2022402014);河北省高等学校科学技术研究项目(ZD2022074)。

摘　　要：针对传统煤矿膏体充填材料对粉煤灰的需求量较大、成本较高的问题,研究矸石粉替代粉煤灰作为辅料时的膏体充填材料性能,采用正交试验方法以及MATLAB进行线性回归预测和3D可视化模型的建立,分析水掺量和水泥掺量对膏体充填材料流动性和力学性能的影响规律。试验结果表明:随着水泥掺量的增加,充填料浆流动性缓慢下降,同龄期抗压强度也持续缓慢增加,且1~3d变化较明显,3~28d变化较小;水掺量是影响流动性的主要因素,尤其是对充填料浆的扩展度的影响最为明显,随着水掺量的增加,同龄期抗压强度在显著减少,且龄期越长,结果越为明显。综合分析得出最优配比为15%水泥掺量,23%水掺量的充填材料,既满足充填强度要求也满足膏体的流动性要求。Aiming at the problem of large demand for fly ash and high cost of traditional coal mine paste filling materials, the performance of paste filling materials is studied when gangue powder replaces fly ash as auxiliary materials. Orthogonal test method and MATLAB are used to carry out linear regression prediction and 3D visualization curve modelling. The influence of water content and cement content on the fluidity and mechanical properties of paste filling materials is analyzed. The test results show that with the increase of cement content, the fluidity of filling slurry decreases slowly, the compressive strength at the same age also increases slowly, and the change is obvious from 1d to 3d, while it is small from 3d to 28d. Water content is the main factor affecting fluidity, especially the expansion degree of filling slurry. With the increase of water content, the compressive strength at the same age is significantly reduced, and the longer the age, the more obvious the result. It’s concluded through comprehensive analysis that, the optimal ratio is 15% cement, 23% water in the filling material, which can meet both the requirements of filling strength and paste liquidity.

关 键 词：膏体充填 矸石粉 正交试验 线性回归 3D可视化模型 

分 类 号：TD823.7[矿业工程—煤矿开采]