低含量超强开采工作面瓦斯异常涌出防治技术

doi:10.16265/j.cnki.issn1003-3033.2017.01.013

中国安全科学学报 ›› 2017, Vol. 27 ›› Issue (1): 71-76.doi: 10.16265/j.cnki.issn1003-3033.2017.01.013

低含量超强开采工作面瓦斯异常涌出防治技术

王春光^1,2,3 副研究员

1 河南理工大学安全科学与工程学院,河南焦作 454000
2 煤矿安全技术国家重点实验室,辽宁抚顺 113122
3 煤科集团沈阳研究院有限公司,辽宁抚顺 113122

收稿日期:2016-11-01 修回日期:2016-12-18 发布日期:2020-11-23
作者简介:王春光 (1978—),男,河北承德人,在读博士研究生,副研究员,主要从事瓦斯灾害防治科研工作。E-mail:38138488@qq.com。
基金资助:
国家“十三五”大型油气田及煤层气开发科技重大专项项目(2016ZX05045-004-001)。

Study on technique for controlling gas abnormal effusing of working face for coal seam poor in gas under extremely intensive mining condition

WANG Chunguang^1,2,3

1 School of Safety Science & Engineering, Henan Polytechnic University, Jiaozuo Henan 454000, China
2 State Key Laboratory of Coal Mine Safety Technology, Fushun Liaoning 113122, China
3 Shenyang Research Institute, China Coal Technology & Engineering Group Fushun Liaoning 113122, China

Received:2016-11-01 Revised:2016-12-18 Published:2020-11-23

摘要/Abstract

摘要： 为解决低瓦斯含量煤层在超高强度开采工艺下,U型通风回采面割煤期间瓦斯涌出量突增、采空区持续高瓦斯涌出以及上隅角瓦斯频繁超限等问题,在确认瓦斯异常涌出原因基础上,以塔山煤矿为例,研究煤层注水抑制落煤瓦斯涌出和专用巷分期排抽采空区瓦斯联合防治技术。结果表明,煤层注水消除了割煤期间瓦斯突增现象——回风流中最大瓦斯体积分数仅0.58%;在开采初期瓦斯专用巷自然引排使回采面形成U+I型通风方式,分担风排瓦斯量约30 m³/min,在开采中、后期的密闭负压抽采,瓦斯排放量提升至40 m³/min。采用该技术,已将回采期间的工作面瓦斯体积分数有效控制在0.6%以下,实现安全高效开采。

关键词: 低瓦斯含量, 超高强度开采, 煤层注水, 瓦斯专用巷, 密闭抽采

Abstract: In order to solve the problems of sudden increase in gas emission during coal cutting, the amount of gas emission continues to increase in goaf, and gas exceeding seriously at the upper corner under "U" type ventilation in the working face for coal seam poor in gas under extremely intensive mining condition. Tashan coal mine was taken as an example, and experiments were carried out to study the inhibition effect of coal seam water injection on gas emission during the fall of coal. A combined control technique for tnm-staging evacuation in the dedicated gas roadway of goaf was developed. The results show that the sudden increase of gas emission can be controlled by using the technology of coal seam water injection during mining, that the maximum volume fraction of gas in return air can be lowered to 0.58%, that U+I-type ventilation of natural evacuation is established during incipient mining in dedicated gas roadway, and the share of windblown gas reaches 30 m³/min, and that the gas emission is raised to 40 m³/min through inclosed vacuum drainage during the middle and later periods of mining.The technology controlled gas density of working face under critical value 0.6% during mining time, which protected mining face with high efficiency and safety.

Key words: low content, ultrahigh strength, water injection technology for coal seam, gas roadway, closed drain

中图分类号:

X936

王春光. 低含量超强开采工作面瓦斯异常涌出防治技术[J]. 中国安全科学学报, 2017, 27(1): 71-76.

WANG Chunguang. Study on technique for controlling gas abnormal effusing of working face for coal seam poor in gas under extremely intensive mining condition[J]. China Safety Science Journal, 2017, 27(1): 71-76.

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低含量超强开采工作面瓦斯异常涌出防治技术

Study on technique for controlling gas abnormal effusing of working face for coal seam poor in gas under extremely intensive mining condition

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