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[1]刘勇,梁博臣,何岸,等.自进式旋转钻头钻孔修复理论及关键参数研究[J].中国安全生产科学技术,2016,12(2):39-44.[doi:10.11731/j.issn.1673-193X.2016.02.007]
　LIU Yong,LIANG Bochen,HE An,et al.Research on theory and technical parameter of borehole restoration for self-propelling and rotating drill[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2016,12(2):39-44.[doi:10.11731/j.issn.1673-193X.2016.02.007]
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自进式旋转钻头钻孔修复理论及关键参数研究
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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2期
页码:
39-44
栏目:
学术论著
出版日期:
2016-02-29

文章信息/Info

Title:
Research on theory and technical parameter of borehole restoration for self-propelling and rotating drill
文章编号:
1673-193X(2016)-02-0039-06
作者:
刘勇1; 2; 梁博臣1; 2; 何岸1; 2; 魏建平1; 2; 3
1．河南省瓦斯地质与瓦斯治理重点实验室省部共建国家重点实验室培育基地， 河南 焦作 454000；
2.河南理工大学 安全科学与工程学院，河南 焦作 454000；
3.煤炭安全生产河南省协同创新中心，河南 焦作 454000
Author(s):
LIU Yong1; 2; LIANG Bochen1; 2;  HE An1; 2;  WEI Jianping1; 2; 3
1. State Key Laboratory Cultivation Base for Gas Geology and Gas Control, Jiaozuo Henan 454000, China;
2. School of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo Henan 454000, China;
3. Coal Production Safety Collaborative Innovation Center in Henan Province, Jiaozuo Henan 454000, China
关键词:
水射流; 钻孔修复; 自进式旋转钻头; 瓦斯抽采
Keywords:
water jet;  borehole restoration;  self-propelling and rotating drill;  gas drainage
分类号:
X936
DOI:
10.11731/j.issn.1673-193X.2016.02.007
文献标志码:
A
摘要:
瓦斯预抽钻孔在抽放过程中经常出现塌孔、堵孔等现象。针对这一问题，提出采用自进式旋转钻头修复失效钻孔的新方法。其利用自进式旋转钻头后置喷嘴的喷射反冲力作为动力，自行至钻孔堵塞段处，前置喷嘴形成的高压水射流对堵孔煤渣进行破碎，将其与水混合返出孔外，实现清孔排渣、钻孔修复的目的。对自进式旋转钻头钻孔破煤清渣的临界射流压力及流量进行分析，基于摩擦动力学计算钻头自驱的临界射流压力，在此基础上设计钻头结构及优化喷嘴布置，数值分析不同喷嘴组合情况下射流速度分布，得出最优喷嘴布置方式。并应用于鹤煤八矿-655轨道石门揭煤瓦斯预抽，实验结果表明：该方法能够实现失效钻孔的修复，并有效的提高了瓦斯抽采效果，缩短了瓦斯抽放时间。
Abstract:
The phenomena of hole collapse and plugging have always occur for gas pre-drainage borehole in the drainage process. Aiming at this problem, a new method of failed borehole restoration by using the self-propelling and rotating drill was put forward. It uses the recoil force of jet flow from the rear nozzles of self-propelling and rotating drill as power to reach the plugging position of borehole by itself. The high pressure water jet from the front nozzles is applied to break the coal cinder plugging the borehole and make it flow out the borehole after mixing with water, so as to realize the goals of borehole cleaning, cinder discharge and borehole restoration. The critical jet pressure and critical flow for coal breaking and cinder discharge of borehole by self-propelling and rotating drill were analyzed, and the critical jet pressure of drill self-propelling was calculated based on the friction dynamics. On this basis, the structure of drill was designed, and the nozzle collocation was optimized. The distribution of jet velocity under different nozzle combinations were analyzed with numerical simulation, and the optimal mode of nozzle collocation was obtained. The method was applied in gas pre-drainage of the -655 horizontal roadway rock cross-cut coal uncovering in the 8th Mine of Hebi. The results showed that it can realize the restoration of failed borehole, enhance the gas drainage effect efficiently and shorten the time of gas drainage.

参考文献/References:

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备注/Memo

备注/Memo:
河南理工大学高校基本科研业务费专项项目(自然科学类)（NSFRF140102）；国家自然科学基金项目（51574112）；教育部科学技术项目（213022A）；教育部“创新团队发展计划”（IRT1235）
更新日期/Last Update: 2016-03-11