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[1]王继仁,郝晋伟,武德全,等.本煤层固液耦合流体壁式密封技术开发及应用[J].中国安全生产科学技术,2015,11(4):33-39.[doi:10.11731/j.issn.1673-193X.2015.04.005]
　WANG Ji-ren,HAO Jin-wei,WU De-quan,et al.Development and application of fluid wall sealing technology by solid-liquid coupling in mining-coal bed[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2015,11(4):33-39.[doi:10.11731/j.issn.1673-193X.2015.04.005]
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本煤层固液耦合流体壁式密封技术开发及应用
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
11
期数:
2015年4期
页码:
33-39
栏目:
学术论著
出版日期:
2015-04-30

文章信息/Info

Title:
Development and application of fluid wall sealing technology by solid-liquid coupling in mining-coal bed
作者:
王继仁1; 郝晋伟1; 武德全 2; 张春华3; 吴海进4
（1.辽宁工程技术大学 安全科学与工程学院，辽宁 阜新 123000；2.辽宁工程技术大学 矿业学院，辽宁 阜新 123000； 3.辽宁工程技术大学 矿业技术学院，辽宁 葫芦岛 125105；4.中国矿业大学 安全工程学院，江苏 徐州 221008）
Author(s):
WANG Ji-ren1;  HAO Jin-wei1;  WU De-quan2;  ZHANG Chun-hua3;  WU Hai-jin4
(1.College of Safety Science and Engineering, Liaoning Technical University, Fuxin Liaoning 123000, China; 2.College of Mining Engineering, Liaoning Technical University, Fuxin Liaoning 123000, China; 3.College of Ming industry Technology, Liaoning Technical University, Huludao Liaoning 125105，China; 4.Faculty of Safety Engineering，China University of Mining & Technology, Xuzhou Jiangsu 221008,China)
关键词:
本煤层; 固液耦合; 流体壁式密封; 瓦斯浓度
Keywords:
:mining-coal bed;  solid-liquid coupling;  fluid wall sealing;  gas concentration
分类号:
X936
DOI:
10.11731/j.issn.1673-193X.2015.04.005
文献标志码:
A
摘要:
针对本煤层瓦斯抽采钻孔密封性差、封孔长度不够、钻孔形变较大、钻孔及周围煤体漏风严重等造成抽采瓦斯浓度偏低、衰减速度较快及稳定性差等技术难题，基于“固封液-液封气”,受限空间膨胀、渗流力学等理论，进行了钻孔及煤体密封技术的实验模拟与现场验证，研究并开发了固液耦合流体壁式密封新技术及设备。研究表明，采用固液耦合流体壁式密封技术可对抽采钻孔及周围煤体裂隙实施动态密封，最终形成粘液、裂隙及钻孔周围煤体相互耦合的立体封面，有效阻止了因抽采负压增大而导致的巷道空气通过钻孔及周围煤体裂隙向抽采钻孔的漏入，使得瓦斯抽采过程浓度稳定，单孔平均浓度提高4~5倍，显著地提高了本煤层瓦斯的抽采效率。
Abstract:
Considering the technical problems such as poor sealing effect, insufficient sealing length, large borehole deformation and the serious air leakage in borehole and surrounding coal body during gas drainage process in mining-coal bed, which have caused the lower gas concentration, the faster decay rate and poor stability, based on the theories of "sealing liquid by solid and sealing air by liquid", limited space expansion and seepage mechanics, the experimental simulation and site validation for sealing technology of borehole and coal body were conducted, and the new technology and equipment of fluid wall sealing by solid-liquid coupling were studied and developed. The results showed that applying the fluid wall sealing technology can implement dynamic sealing for drainage borehole and coal body fractures around it, and eventually form the coupled stereoscopic covers by mucus, fractures and coal body around borehole. It effectively prevented the air leakage from roadway to drainage borehole through borehole and surrounding coal body fractures caused by increasing of drainage negative pressure, and kept the constant concentration in process of gas drainage. The average concentration of single hole was improved by 4~5 times, and the gas drainage efficiency in mining-coal bed was evidently improved.

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备注/Memo

备注/Memo:
国家自然科学基金资助项目（51304112）
更新日期/Last Update: 2015-04-30