注浆压力对孔隙介质注浆改造效果影响的试验研究  

Experimental study on the influence of grouting pressure on the grouting transformation effect of porous media

作　　者：易四海 仲锐 景胜强 王越 朱伟 YI Sihai;ZHONG Rui;JING Shengqiang;WANG Yue;ZHU Wei(School of Safety Engineering,North China Institute of Science and Technology,Yanjiao 065201,China;School of Emergency Technology and Management,Institute of Disaster Prevention,Yanjiao 65201,China;CCTEG Ecological Environment Technology Co.,Ltd.,Tianjin 300450,China)

机构地区：[1]华北科技学院安全工程学院,北京东燕郊065201 [2]防灾科技学院应急管理学院,北京东燕郊065201 [3]中煤科工生态环境科技有限公司,天津300450

出　　处：《华北科技学院学报》2024年第6期1-6,共6页Journal of North China Institute of Science and Technology

基　　金：国家自然科学基金面上项目(52274165)。

摘　　要：为了分析注浆压力对松散层注浆改造效果的影响,采用室内试验的方法,围绕不同注浆压力对浆液在孔隙介质中的渗透效果和扩散规律展开研究。试验研究表明,浆液在孔隙介质中的渗透扩散半径与注浆压力有关,当注浆压力低于0.08 MPa时,浆液扩散半径会迅速减小;当注浆压力高于0.08 MPa时,浆液扩散半径缓慢增大;注浆改造能够显著提高孔隙介质的防渗能力,距注浆孔越近的被注介质的渗透系数越小,防渗能力越强,防渗能力最高可提升约99%;在无水环境下对孔隙介质进行注浆改造时,结石体形态多为圆台型,浆液扩散半径上窄下宽。该研究成果可为松散层注浆防渗改造提供理论支持。In order to analyze the influence of grouting pressure on the grouting transformation effect of loose layers,the indoor experiments are conducted to study the permeability and diffusion law of grout in porous media under different grouting pressures.The experimental studies have shown that the diffusion radius of grout in porous media is related to the grouting pressure.When the grouting pressure is below 0.08 MPa,the diffusion radius of grout will rapidly decrease;When the grouting pressure is higher than 0.08 MPa,the diffusion radius of the slurry slowly increases;Grouting transformation can significantly improve the anti-seepage ability of porous media.The closer the injection hole is,the smaller the permeability coefficient of the injected medium,the stronger the anti-seepage ability,and the highest anti-seepage ability can be increased by about 99%;When grouting and transforming porous media in an anhydrous environment,the shape of the stone body is mostly a circular cone shape,with a narrow diffusion radius of the slurry.This research achievement can provide theoretical support for the anti-seepage transformation of loose layer grouting.

关 键 词：注浆改造 注浆压力 渗透系数 扩散半径 结石体形态 

分 类 号：TD745.2[矿业工程—矿井通风与安全]