青龙煤矿高位定向钻孔瓦斯抽采实践

孟祥军; 陈功华; 阮国强; 张彬彬; 郭英

doi:10.13272/j.issn.1671-251x.2019060073

青龙煤矿高位定向钻孔瓦斯抽采实践

1.
兖矿集团有限公司，山东邹城273500
2.
兖矿贵州能化有限公司，贵州贵阳550000
3.
贵州黔西能源开发有限公司，贵州黔西551500
4.
西安科技大学安全科学与工程学院，陕西西安710054
5.
西安科技大学教育部西部矿井开采及灾害防治重点实验室，陕西西安710054

基金项目:

国家自然科学基金资助项目（51904236）

详细信息

中图分类号: TD712
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- 文章访问数: 64
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出版历程
- 刊出日期: 2019-12-19

Practice of gas drainage by high-level directional borehole in Qinglong Coal Mine

1.
Yankuang Group Co., Ltd., Zoucheng 273500, China
2.
Yankuang Guizhou Nenghua Co., Ltd., Guiyang 550000, China
3.
Guizhou Qianxi Energy Development Co., Ltd., Qianxi 551500, China
4.
College of Safety Science and Engineering, Xi''an University of Science and Technology, Xi''an 710054, China
5.
Key Laboratory of Western Mine Exploitation and Hazard Prevention, Ministry of Education, Xi''an University of Science and Technology, Xi''an 710054, China

摘要

摘要: 针对高位钻孔瓦斯抽采存在钻孔数量多、单孔深度不足、钻孔轨迹不可控、瓦斯抽采浓度较低、抽采不连续等问题，为有效防治青龙煤矿21602工作面回采期间上隅角瓦斯浓度超限，利用高位定向钻孔技术对瓦斯进行抽采，介绍了高位定向钻孔设计施工方案，通过现场实践确定了最佳钻孔布置参数。结果表明：高位定向钻孔具有瓦斯抽采浓度高、抽采量大、抽采率高等特点，且高位定向钻孔瓦斯抽采效果随工作面回采距离的增加呈先稳定后下降的趋势；当高位定向钻孔终孔层位距离顶板39 m、距离回风巷右帮水平位移为55 m时，瓦斯抽采体积分数达30.5%，瓦斯抽采流量达18 m3/min，瓦斯抽采纯量达2.374 m3/min，瓦斯抽采效果最佳；上隅角瓦斯体积分数由抽采前的最大值0.72%降低至抽采期间的0.2%～0.4%，有效解决了上隅角瓦斯浓度超限问题。
- 煤炭开采 /
- 瓦斯抽采 /
- 高位定向钻孔 /
- 钻孔布置 /
- 回采距离 /
- 上隅角瓦期浓度超限
Abstract: Aiming at problems of gas drainage by high-level borehole such as too many boreholes, insufficient single borehole depth, uncontrollable borehole trajectory, low gas drainage concentration and discontinuous drainage, in order to effectively prevent and control gas concentration overrunning in upper corner of 21602 mining face in Qinglong Coal Mine, gas drainage was carried out by use of high-level directional borehole technology. Design and construction schemes of high-level directional borehole were introduced, and the best borehole layout parameters were determined through field practice. The results show that high-level directional borehole has the characteristics of high gas drainage concentration, large drainage volume and high drainage rate, and gas drainage effect of high-level directional borehole tends to stabilize first and then decreases with the increase of mining distance. When the final hole of high-level directional borehole is 39 m away from roof and 55 m away from right side of return airway, gas drainage effect is the best with gas drainage volume fraction reaching 30.5%, gas drainage flow reaching 18 m3/min and gas drainage pure volume reaching 2.374 m3/min. Gas volume fraction in upper corner is reduced to the range from 0.2% to 0.4%, which is up to 0.72% before extraction. It effectively solves problem of gas concentration overrunning in upper corner.
- coal mining /
- gas drainage /
- high-level directional borehole /
- borehole layout /
- mining distance /
- gas concentration overlimit in upper corner

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文章访问数: 64
HTML全文浏览量: 11
PDF下载量: 13
被引次数: 8

青龙煤矿高位定向钻孔瓦斯抽采实践

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出版历程

Practice of gas drainage by high-level directional borehole in Qinglong Coal Mine

期刊类型引用(7)

其他类型引用(1)

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