软弱破碎煤岩体封注一体机理与新型封注装置设计  

Integrated grouting and sealing mechanism of soft broken coal and rock mass and design of novel sealing and grouting devic

作　　者：刘少伟[1,2] 马保平 张英 付孟雄 贾连鑫 彭博 卢运海 姜彦军 LIU Shaowei;MA Baoping;ZHANG Ying;FU Mengxiong;JIA Lianxin;PENG Bo;LU Yunhai;JIANG Yanjun(School of Energy Science and Engineering,Henan Polytechnic University,Jiaozuo,Henan 454000,China;State Collaborative Innovation Center of Coal Work Safety and Clean-efficiency Utilization,Jiaozuo,Henan 454000,China;Shanxi Sanyuan Fuda Coal Industry Co Ltd,Changzhi,Shanxi 046300,China;Zhongyun International Engineering Co Ltd,Zhengzhou,Henan 450007,China;China Shenhua Energy Co Ltd Shendong Coal Branch Company,Shenmu,Shaanxi 719315,China;Sichuan Coal Industry Group Limited Liability Company,Chengdu,Sichuan 610031,China;Xinzheng Coal Electricity Zhengzhou Coal Industry Group,Xinzheng,Henan 451100,China)

机构地区：[1]河南理工大学能源科学与工程学院,河南焦作454000 [2]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454000 [3]山西三元福达煤业有限公司,山西长治046300 [4]中赟国际工程有限公司,河南郑州450007 [5]中国神华能源股份有限公司神东煤炭分公司,陕西神木719315 [6]四川省煤炭产业集团公司,四川成都610031 [7]河南省新郑煤电有限责任公司,河南新郑451100

出　　处：《采矿与安全工程学报》2022年第1期94-106,共13页Journal of Mining & Safety Engineering

基　　金：国家自然科学基金项目(52074102);河南省自然科学杰出青年基金项目(212300410006);河南省高校创新人才资助项目(19HASTIT048)。

摘　　要：传统的封注装置及方法在软弱破碎煤岩体巷道的应用中存在操作烦琐、封孔效果差、注浆压力低等问题。设计一种新型封孔注浆装置,通过分析其封孔与注浆工作机理,分别建立新型封注装置及注浆孔受力力学模型,得到注浆压力及封孔长度的合理范围;采用理论分析与数值模拟相结合的方法,以封孔胶套受力、变形特征为主线,依据封孔胶套与孔壁接触特征,确定装置封孔段胶套几何尺寸与注浆孔径间的最佳匹配关系。结合工程实际,根据新型封注装置工作参数,模拟再现巷道帮部煤体注浆加固过程,揭示浆液流动规律及煤体应力、孔隙率变化规律,优化注浆孔孔深,形成一套较为具体的封孔注浆加固方案,在现场取得良好的应用,为类似条件下巷道围岩注浆加固提供了一定依据。In traditional sealing and grouting devices and methods exist such problems in the application of soft and broken coal and rock mass roadways as cumbersome operation,poor sealing effect,and low grouting pressure.In the present study,a novel sealing and grouting device was designed,working mechanism of sealing and grouting was analyzed,mechanical models of novel sealing and grouting device and grouting hole were established respectively,and reasonable ranges of grouting pressure and sealing length were obtained.Through theoretical analysis and numerical simulation,the best matching relationship between geometric size of rubber sleeve of the device and grouting hole diameter was determined according to touching characteristics of sealing sleeve and borehole wall with force and deformation characteristics of sealing rubber sleeve as the main line.Combined with an actual project,according to working parameters of novel sealing and grouting device,the coal mass grouting reinforcement process of coal roadway side was simulated and reproduced.Meanwhile slurry flow characteristic and evolution characteristic of coal mass stress and porosity were revealed,and grouting hole depth was optimized.A set of more concrete sealing and grouting reinforcement schemes has achieved good application in the field,which provides evidence for grouting reinforcement of surrounding rock of the roadway under similar conditions.

关 键 词：软弱破碎煤岩体 封孔机理 封孔段优化 新型封注装置 

分 类 号：TD265[矿业工程—矿井建设]