| 松软破碎煤巷注浆加固技术与应用 |
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| 引用本文： | 李磊,柏建彪,王襄禹,闫帅,肖同强,张永杰.松软破碎煤巷注浆加固技术与应用[J].煤炭科学技术,2010(8). |
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| 作者姓名： | 李磊 柏建彪 王襄禹 闫帅 肖同强 张永杰 |
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| 作者单位： | 中国矿业大学煤炭资源与安全开采国家重点实验室,江苏,徐州,221008;中国矿业大学矿业工程学院,江苏,徐州,221116 |
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| 基金项目： | 国家自然科学基金资助项目，全国博士学位论文作者专项资金资助项目，煤炭资源与安全开采国家重点实验室自主研究课题资助项目，教育部新世纪优秀人才支持计划资助项目 |
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| 摘 要： | 为确定加固松软破碎煤巷合理的注浆参数,对不同水灰比条件下高水速凝材料单液浆和混合液浆流变曲线进行了回归分析,结果表明:各流变曲线相关系数均大于0.97,回归方程均符合宾汉体的本构方程,确定其流型为宾汉体,针对松软破碎煤巷孔隙率大、渗透系数大、有动压下表现出一定流动性特点,基于广义达西定律和球形扩散理论模型,采用注浆过程中浆液流型不变的假设,推导出宾汉体在松软破碎煤层中基于黏度时变性的有效扩散半径计算公式,进而确定注浆孔间排距和注浆压力的合理参数,与常用注浆参数计算 Maag 公式相比,因该公式没考虑浆液的屈服强度和黏度时变性,计算的注浆扩散半径偏大.该技术应用于大阳煤矿 3100 工作面回风巷注浆工程,取得了良好的维护效果.
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| 关 键 词： | 松软破碎煤巷 注浆加固 宾汉流体模型 黏度时变性 扩散半径 |
Grouting Reinforcement Technology and Application in Soft and Broken Seam Gateway |
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| LI Lei,BAI Jian-biao,WANG Xiang-yu,YAN Shuai,XIAO Tong-qiang,ZHANG Yong-jie.Grouting Reinforcement Technology and Application in Soft and Broken Seam Gateway[J].Coal Science and Technology,2010(8). |
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| Authors: | LI Lei BAI Jian-biao WANG Xiang-yu YAN Shuai XIAO Tong-qiang ZHANG Yong-jie |
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| Affiliation: | LI Lei1,2,BAI Jian-biao1,WANG Xiang-yu1,YAN Shuai1,XIAO Tong-qiang1,ZHANG Yong-jie1,2(1.State Key Lab of Coal Resources and Safety Mining,China University of Mining and Technology,Xuzhou 221008,China,2.School of Mining Engineering,Xuzhou 221116,China) |
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| Abstract: | In order to determine the rational grouting parameters to reinforce the soft and broken seam gateway,a regressive analysis was conducted on the rheological curve of the high water rapid hardening single grout and the mixed grout under different the water and cement rates.The results showed that the relative coefficient of each rheology curve would be over 0.97,the regressive equation could meet the constitutive equation of Bingham fluid.The fluid type was set as the Bingham fluid.According to the large poro... |
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| Keywords: | soft and broken seam gateway grouting reinforcement Bingham fluid model viscosity time variety diffusion radius |
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