穿层钻孔帷幕注浆一体化技术的实践研究  

Practical Research on Integrated Technology of Curtain Grouting in Through Layer Boreholes

作　　者：马广兴 王东杰 陈立伟[2,3,4] 边乐 MA Guangxing;WANG Dongjie;CHEN Liwei;BIAN Le(Yongcheng Yongan Mine Safety Technology Engineering Co.,Ltd.,Yongcheng,Henan 476600,China;College of Safety Science and Engineering,Henan Polytechnic University,Jiaozuo,Henan 454000,China;Collaborative Innovation Center of Coal Work Safety and Clean High Efficiency Utilization,Jiaozuo,Henan 454000,China;Engineering Research Center of Ministry of Education for Coal Mine Disaster Prevention and Emergency Relief,Jiaozuo,Henan 454000,China)

机构地区：[1]永城永安矿山安全技术工程有限公司,河南永城市476600 [2]河南理工大学安全科学与工程学院,河南焦作市454000 [3]煤炭安全生产与清洁高效利用省部共建协同创新中心,河南焦作市454000 [4]煤矿灾害预防与抢险救灾教育部工程研究中心,河南焦作市454000

出　　处：《矿业研究与开发》2024年第4期144-151,共8页Mining Research and Development

基　　金：国家自然科学基金资助项目(52074104);河南省科技攻关计划项目(222102320142)。

摘　　要：车集煤矿底抽巷经过多轮瓦斯抽采穿层钻孔后,巷道围岩产生了较多的裂隙,导致钻孔封堵不严密,影响瓦斯抽采效果。针对此问题,选择帷幕注浆技术对巷道进行加固。首先,通过COMSOL Multiphysics软件建立实体煤岩钻孔注浆数值模型;然后,根据数值模拟结果分析注浆浆液在裂隙岩体中的扩散规律,并设计出适宜的注浆方案;最后,在现场开展钻帷一体化帷幕注浆和注帷一体化封孔注浆工艺的试验研究。结果表明:采取帷幕注浆措施能够有效封堵裂隙,提升瓦斯抽采浓度。相较于非帷幕注浆钻孔,试验钻孔单孔平均始抽浓度提高了9.4个百分点,单孔平均再抽浓度提高了14.5个百分点。该技术为类似矿山帷幕注浆工程提供了技术借鉴。After many rounds of gas extraction and through layer boreholes in the bottom pumping roadway of Cheji coal mine,the surrounding rocks of the roadway produces more cracks leading to poor sealing of the drilling holes,which affects the effect of gas extraction.In view of the problem,curtain grouting technology was selected to reinforce the roadway.Firstly,a numerical model of solid coal rock borehole grouting was established by COMSOL Multiphysics software.Then,according to the numerical simulation results,the diffusion law of the grouting slurry in the crack rock was analyzed,and the suitable grouting scheme was designed.Finally,the experimental research of the drilling integrated curtain grouting and grouting integrated sealing grouting process was carried out in the field.The results show that curtain grouting measures can effectively seal the cracks and increase the gas extraction concentration.Compared with the non-curtain grouting drilling holes,the average initial pumping concentration of a single hole in the test borehole increases by 9.4 percentage points,and the average re-pumping concentration of a single hole increases by 14.5 percentage points.This technology provides a technical reference for curtain grouting projects in similar mines.

关 键 词：帷幕注浆 穿层钻孔 瓦斯抽采 封堵裂隙 数值模拟 

分 类 号：TD712[矿业工程—矿井通风与安全]