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[1]高科,刘剑,耿晓伟,等.急倾斜综放面采空区瓦斯及自燃综合防治数值模拟[J].中国安全生产科学技术,2014,10(6):58-65.[doi:10.11731/j.issn.1673-193x.2014.06.009]
　GAO Ke,LIU Jian,GENG Xiao wei,et al.Prevention and control technology and numerical simulation on gas and spontaneous combustion in gob at steep inclined fullymechanized caving face[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2014,10(6):58-65.[doi:10.11731/j.issn.1673-193x.2014.06.009]
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急倾斜综放面采空区瓦斯及自燃综合防治数值模拟
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
10
期数:
2014年6期
页码:
58-65
栏目:
学术论著
出版日期:
2014-06-30

文章信息/Info

Title:
Prevention and control technology and numerical simulation on gas and spontaneous combustion in gob at steep inclined fullymechanized caving face
文章编号:
20140609
作者:
高科1; 2; 刘剑1; 2; 耿晓伟1; 2; 刘玉姣1; 张家琪1
(1辽宁工程技术大学 安全科学与工程学院，辽宁 葫芦岛 125105；2 矿山热动力灾害与防治教育部重点实验室， 辽宁 葫芦岛 125105)
Author(s):
GAO Ke1; 2;  LIU Jian1; 2;  GENG Xiaowei1; 2;  LIU Yujiao1;  ZHANG Jiaqi1
(1.College of Safety Science and Engineering, Liaoning Technical University, Huludao Liaoning 125105, China； 2. Key Laboratory of Mine Thermomotive Disaster and Prevention, Ministry of Education, Huludao Liaoning 125105, China)
关键词:
急倾斜; 高瓦斯; 采空区; 瓦斯及自燃防治; 数值模拟
Keywords:
steep inclined;  high gascontaining;  easy spontaneous combustion;  gob;  prevention and control for gas and spontaneous combustion;  numericalsimulation
分类号:
X936
DOI:
10.11731/j.issn.1673-193x.2014.06.009
文献标志码:
A
摘要:
针对急倾斜高瓦斯易自燃厚煤层综放面缓慢推进条件下采空区瓦斯事故及火灾的严重性，提出了上隅角浮抽、上顺槽铺设预埋管路采空区抽放、钻场顺层钻孔裂隙带抽放瓦斯的综合防瓦斯措施，但抽采扩大了自燃氧化带，为保证采空区抽放条件下的自然发火控制，采用注氮技术控制缓慢推进工作面的采空区自燃三带范围，通过Fluent模拟分析了工作面风量对采空区火与瓦斯的影响，瓦斯抽放对采空区流场及自燃“三带”分布的影响及注氮效果。结果表明，供风量增大到一定程度，自燃氧化带最大宽度及瓦斯浓度超90%边界距工作面最大距离都会趋于平缓，该拐点为防火防瓦斯的最佳风量，Fluent模拟分析了采取防火防瓦斯措施后流场，验证了综合抽放配合注氮技术解决采空区瓦斯积聚及自然发火危险的有效性。
Abstract:
In order to reduce the risks of gas accident and fire in gob at steep inclined, high gascontaining, and easy spontaneous combustion coal seam at the condition of slow advance speed, the comprehensive measures were taken including floating pumping at upper corner angle, pumping by pipeline preburied in the gob near upper gateway and gas drainage with boreholes along coal seam. However, the range of oxidation zone increased. So nitrogen injection technology was adopted for controlling the extent of three zones in the gob. 〖JP2〗Some works were done by Fluent as follows: (1) the influence on fire and gas in goaf by air volume; (2)the influence on flow field and three zones in the gob due to pumping; (3)the injection technology effect . The results showed that when air volume increases to a certain level, the maximum width of oxidation zone and the maximum distance from the face where gas concentration is over 90% will both tend to be steady, and the air volume is the best for control gas and fire. The flow field in goaf after applying the measures was analyzed by Fluent, and the measures by comprehensive gas drainage and nitrogen injection technology were verified for gas accumulation and spontaneous combustion in the gob.

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备注/Memo

备注/Memo:
国家自然科学基金委员会与神华集团有限公司联合项目(51174265)；第二批市场调研暨校基金（SCDY2013028）;大学生创新创业训练计划项目（201310147030）
更新日期/Last Update: 2014-07-28