煤矿井下硬岩层高效成孔方法研究与应用

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英文篇名：Study and Application of Efficient Pore-forming in Hard Rock Formations of Coal Mine 作者：魏宏超 英文作者：WEI Hongchao;China Coal Technology and Engineering Group Xi'an Research Institute; 关键词：冲击钻进 ; 弧角钻头 ; 超高压冲击器 ; 硬岩层 ; 穿层钻孔 英文关键词：percussion drilling;;arc angle bit;;high pressure hydraulic impactor;;hard rock;;through beds hole 中文刊名：MKAQ 英文刊名：Safety in Coal Mines 机构：中煤科工集团西安研究院有限公司; 出版日期：2016-11-20 出版单位：煤矿安全 年：2016 期：v.47;No.507 语种：中文; 页：MKAQ201611032 页数：3 CN：11 ISSN：21-1232/TD 分类号：119-121

摘要

针对安徽淮南、河南义马等矿区在施工穿层钻孔钻硬岩时钻进效率低、钻头消耗量大等问题,通过优化钻头结构、引进超高压液动冲击器等方法,对弧角式钻头回转钻进、低压液动回转冲击钻进及超高压液动冲击回转钻进等3种钻进工艺进行了研究,分4类钻具组合共进行了7组工程试验。试验表明,对不同硬度级别的岩石,3种钻进工艺钻进效率差别较大,其中超高压液动冲击钻进和圆弧式钻头回转钻进是2种较为高效的途径。在坚固性系数f=15的岩层中钻进时,超高压液动冲击器钻进效率达到气动冲击器钻进效率的7倍左右。
        At the coal mining areas of Anhui Huainan and Henan Yima,the drilling efficiency was low and the consumption of the bit was big when drilling was in hard rock. By optimizing bit structure,introducing ultra- high pressure hydraulic impactor method,the arc angle bit rotary drilling,low pressure hydraulic rotary percussion drilling and super high pressure hydraulic impact rotary drilling and other three kinds of drilling process are studied,and four kinds of assembly and seven groups of engineering test were conducted.Tests show that for different levels of rock hardness,the difference of drilling efficiency by three kinds of drilling technology is bigger,the super high pressure hydraulic impact rotary drilling and arc type bit rotary drilling are two more efficient ways; when drilling is in the rock with consistence coefficient f = 15,the drilling efficiency of super high pressure hydraulic impactor is about seven times of that of pneumatic impactor.

引文

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