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[1]王成,洪紫杰,熊祖强.基于瓦斯抽采关键封孔参数及新型封孔材料应用研究[J].中国安全生产科学技术,2016,12(9):65-70.[doi:10.11731/j.issn.1673-193x.2016.09.012]
 WANG Cheng,HONG Zijie,XIONG Zuqiang.Study on key sealing parameters of gas drainage and application of new sealing material[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2016,12(9):65-70.[doi:10.11731/j.issn.1673-193x.2016.09.012]
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基于瓦斯抽采关键封孔参数及新型封孔材料应用研究
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
12
期数:
2016年9期
页码:
65-70
栏目:
现代职业安全卫生管理与技术
出版日期:
2016-09-30

文章信息/Info

Title:
Study on key sealing parameters of gas drainage and application of new sealing material
文章编号:
1673-193X(2016)-09-0065-06
作者:
王成12洪紫杰1熊祖强12
(1.河南理工大学 能源科学与工程学院,河南 焦作 454003;2.煤炭安全生产河南省协同创新中心,河南 焦作 454003)
Author(s):
WANG Cheng12 HONG Zijie1 XIONG Zuqiang12
(1. School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo Henan 454003, China;2. Collaborative Innovation Center of Coal Work Safety of Henan Province, Jiaozuo Henan 454003, China)
关键词:
封孔方式封孔时效性正交试验塑性变形抽采浓度
Keywords:
sealing method sealing timeliness orthogonal test plastic deformation drainage concentration
分类号:
X936
DOI:
10.11731/j.issn.1673-193x.2016.09.012
文献标志码:
A
摘要:
针对煤层瓦斯抽采封孔参数选取不合理,传统封孔材料封堵钻孔周边裂隙效果差等主要问题,采用数值模拟、实验室试验及工程实践等多种手段,分析不同封孔方式的漏气效果,研究封孔时效性对瓦斯抽采的影响,完成最优实验配比及性能测试,验证了现场瓦斯抽采效果。结果表明:全封孔方式抽采效果优于半封孔,合理控制封孔时效性,钻孔周边围岩破坏减少,封孔效果提高;正交试验确定材料最优配比即复合早强剂0.3%、复合缓凝剂0.5%、膨胀剂0.03%、水灰比1.2;试样周围充斥着交叉、贯通的“网状结构”钙矾石,且呈现多而密的粗棒状结构;材料具备塑性变形特性,持续变形量大;与矿方原封孔材料相比,新型封孔材料封孔后瓦斯抽采浓度提高193.3%,抽采周期明显延长,抽采效果显著提高。
Abstract:
Aiming at the problems that the sealing parameters of gas drainage in coal seam have been selected unreasonably, and the effect of sealing the surrounding cracks around the borehole by the traditional sealing material is poor, through applying multiple ways including numerical simulation, laboratory test and engineering practice, the leakage effect of different sealing methods were analyzed, and the influence of sealing timeliness on gas drainage was studied. The optimum experiment ratio and performance test were completed, and the effect of field gas drainage was verified. The results showed that the effect of full sealing method was better than that of half sealing. When the sealing timeliness was controlled reasonably, the damage on surrounding rock of borehole was reduced, and the sealing effect was improved. The optimal ratio of material was determined by the orthogonal test, namely the complex accelerator was 0.3%, the composite retarders was 0.5%, the swelling agent was 0.03%, and the water cement ratio was 1.2. The crossing and linking "network structure" ettringite filled around the test specimen, and presented many and dense coarse rod structure. The material had the characteristic of plastic deformation, with a large continuous deformation. Compared with the former sealing material of the mine, the gas drainage concentration increased by 193.3% after sealing by the new sealing material, the drainage cycle prolonged obviously, and the drainage effect increased significantly.

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备注/Memo

备注/Memo:
国家自然科学基金项目(51304065,51274088,50908076);河南理工大学青年骨干项目
更新日期/Last Update: 2016-12-08