董红娟;张金山;姚贺瑜;辛亚军;董帅;

• 1:内蒙古科技大学矿业研究院
• 2:河南理工大学能源科学与工程学院
• 3:煤炭安全生产河南省协同创新中心

摘要(Abstract)：

通过对3组18个大尺度注浆体试件进行单轴压缩力学试验与X射线衍射分析,研究了破碎岩块粒径、注浆液水灰质量比与注浆压力对注浆体试件抗压强度、轴向变形与横向变形的影响机制,分析了岩浆界面过渡区矿物成分,探讨了不同注浆体试件基本失稳模式.结果表明:随着粒径范围增大,注浆体强度、轴向应变呈"凸"形状态,横向应变相反,粒径从1～2 cm增加到3～4 cm,注浆体强度提高了48.32%;随着水灰质量比增加,注浆体强度、轴向应变呈指数衰减形态,横向应变呈"凸"形趋势,水灰质量比从0.67增加到1.00,注浆体强度衰减了30.09%;随着注浆压力增大,注浆体强度、轴向应变与横向应变均呈微小增加趋势,轴向应变增幅小于1%;注浆压力从0.5 MPa增加到1.5 MPa,强度提高了10.78%;不同注浆压力与水灰质量比促进了岩浆界面矿物成分发生化学变化,增强了界面胶结强度与整体承载强度;3组注浆体试件呈5种基本破坏形态分布,表现为3种失稳模式.

关键词(KeyWords)： 破碎岩块;注浆强化;强度特征;变形机制;失稳模式

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(51374091);; 内蒙古自治区科技重大专项(NMZDZX2017019; NMZDZX2018022)

作者(Author): 董红娟;张金山;姚贺瑜;辛亚军;董帅;

Email:

DOI: 10.13247/j.cnki.jcumt.001233

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