考虑浆液黏度时变性的底板含水层注浆充填改造机制研究  

Study on the Grouting Filling Reconstruction Mechanism of Floor Aquifer Considering the Time-varying Grout Viscosity

作　　者：程帅帅 黄存捍[2] 张伟 翟明磊 王文强 曹正正 CHENG Shuaishuai;HUANG Cunhan;ZHANG Wei;ZHAI Minglei;WANG Wenqiang;CAO Zhengzheng(School of Civil Engineering,Henan Polytechnic University,Jiaozuo 454000,China;School of Resources and Environment,Henan Polytechnic University,Jiaozuo 454000,China;Zhaojiazhai Coal Mine,Henan Xinzheng Coal Electricity Co.,Ltd.,Xinzheng 451184,China)

机构地区：[1]河南理工大学土木工程学院,河南焦作454000 [2]河南理工大学资源环境学院,454000 [3]河南省新郑煤电有限责任公司赵家寨煤矿,河南新郑451184

出　　处：《绿色矿冶》2024年第6期28-34,共7页Sustainable Mining and Metallurgy

基　　金：河南省科技攻关计划项目(232102321098);河南省自然科学基金资助项目(242300421246);河南省双一流学科建设专项项目(AQ20240724)。

摘　　要：注浆是防治煤层底板含水层突水灾害的主要技术手段之一。通过注浆改造底板灰岩含水层,改变其为隔水层或弱含水层,可有效根治底板水害,实现矿井安全高效开采。本文基于宾汉体浆液,建立了恒定注浆速率下考虑浆液黏度时变性的一维渗流注浆理论模型,分析了裂隙注浆液扩散距离与注浆压力之间的定量关系,研究了水平裂隙浆液扩散规律,揭示了水平裂隙注浆浆液扩散机理。利用该模型,如果已知含水层静水压力和注浆流量,可以得到预定浆液扩散半径所需的注浆压力。最后,结合赵家寨煤矿22采区L_(1-2)灰岩含水层现场注浆改造工程,对研究成果进行验证。注浆加固改造结果显示,注浆质量均达到设计要求,L_(1-2)灰岩含水层得到有效改造。Grouting is one of the main technical means to prevent water inrush disaster of aquifer in coal seam floor.By grouting reconstruction of floor limestone aquifer,it can be changed into water barrier or weak aquifer,which can effectively cure floor water damage and realize safe and efficient mining.In this paper,based on Bingham grout,a one-dimensional seepage grouting theoretical model with time-varying slurry viscosity under constant grouting rate was established.The quantitative relationship between the diffusion distance and grouting pressure of fissure grout was analyzed.The diffusion law of horizontal fissure grout was studied,and the diffusion mechanism of horizontal fissure grout was revealed.In this model,the grouting pressure required for a predetermined grout diffusion radius can be obtained by using known aquifer hydrostatic pressure and grouting flow.Finally,combined with the field grouting reconstruction project of L_(1-2) limestone aquifer in Zhaojiazhai 22 mining area,the research results were verified.The results of grouting reinforcement and reconstruction show that the gronting quality meets the design requirements,and the L_(1-2) limestone aquifer is effectively reconstructed.

关 键 词：裂隙含水层 宾汉流体 黏度时变性 浆液扩散 注浆充填 

分 类 号：TD853[矿业工程—金属矿开采]