瓦斯抽采钻孔磁性密封浆液配合比试验研究

doi:10.16265/j.cnki.issn1003-3033.2019.07.014

中国安全科学学报 ›› 2019, Vol. 29 ›› Issue (7): 84-89.doi: 10.16265/j.cnki.issn1003-3033.2019.07.014

瓦斯抽采钻孔磁性密封浆液配合比试验研究

刘超^1,2 教授, 杨铭扬¹, 苏俊凯¹, 赵亚婕¹

1 西安科技大学安全科学与工程学院,陕西西安 710054;
2 深部煤炭开采与环境保护国家重点实验室,安徽淮南 232001

收稿日期:2018-03-08 修回日期:2019-05-29 出版日期:2019-07-28
作者简介:刘超 (1981—),男,河南焦作人,博士,教授,博士生导师,主要从事采动煤岩体动力灾害理论、监测预警及防治方法等方面的研究工作。E-mail:liuchao2001@xust.edu.cn。

Experimental study on mix proportion of magnetic sealing slurry for gas drainage borehole

LIU Chao^1,2, YANG Mingyang¹, SU Junkai¹, ZHAO Yajie¹

1 College of Safety Science and Engineering, Xi'an University of Science and Technology, Xi'an Shaanxi 710054, China;
2 State Key Laboratory of Deep Coal Mining & Environment Protection, Huainan Anhui 232001, China

Received:2018-03-08 Revised:2019-05-29 Published:2019-07-28

摘要/Abstract

摘要： 为探究一种具有磁性特性的瓦斯抽采钻孔密封浆液配合比,选取微米粒度(3 μm)下的羰基铁粉和纳米粒度(200 nm)下的四氧化三铁(Fe₃O₄)为磁性粒子,以一定比例聚乙烯醇和水作为密封浆液主要基液,按照磁性粒子在浆液中不同质量分数、不同磁性粒子种类以及不同磁性粒子粒度,进行多水平多因素下的浆液配合比试验,并借助三维磁性成像系统作相似材料模拟,验证浆液的磁性示踪效果。结果表明:在以羰基铁粉为主要溶质的浆液中加入一定量Fe₃O₄,可大幅度降低密封浆液沉降率;在相似材料密封胶结后,浆液中的磁性粒子可较好地表征出相似材料内密封浆液的填充胶结位置,且在相似材料中,磁性强度越大的区域,内部破裂越明显。

关键词: 密封浆液流动轨迹, 磁性成像, 磁性粒子, 密封浆液, 瓦斯抽采钻孔

Abstract: In order to explore the mix proportion of sealing slurry with the character of magnet for gas drainage borehole, carbonyl iron powder with micron size (3 μm) and ferro-ferric oxide (Fe₃O₄) with nanoparticle size (200 nm) were selected as magnetic particles, and polyvinyl alcohol and water in a certain proportion were taken as the main base liquor of sealing slurry. Then the slurry mixing ratio experiments under multi-level and multi-factor conditions were carried out according to different mass fractions of magnetic particles in the slurry and different types and particle sizes of magnetic particles. Similar material simulation experiments were conducted by means of three-dimensional magnetic imaging system. Magnetic tracking effect of the slurry was verified. The results show that adding a certain amount of Fe₃O₄ into the slurry with carbonyl iron powder as the main solute can greatly reduce the sedimentation rate of the sealing slurry, that after the sealing of similar materials, the magnetic properties in the slurry can better characterize the filling and bonding cementing position of the sealing slurry in similar materials, and that in similar materials,the internal cracking will be more obvious in areas with larger magnetic strength.

Key words: sealing slurry flow trajectory, magnetic imaging, magnetic particles, sealing slurry, gas drainage borehole

中图分类号:

X936

刘超, 杨铭扬, 苏俊凯, 赵亚婕. 瓦斯抽采钻孔磁性密封浆液配合比试验研究[J]. 中国安全科学学报, 2019, 29(7): 84-89.

LIU Chao, YANG Mingyang, SU Junkai, ZHAO Yajie. Experimental study on mix proportion of magnetic sealing slurry for gas drainage borehole[J]. China Safety Science Journal, 2019, 29(7): 84-89.

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瓦斯抽采钻孔磁性密封浆液配合比试验研究

Experimental study on mix proportion of magnetic sealing slurry for gas drainage borehole

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