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[1]耿晓伟,刘雨,郭晓阳,等.基于“O”型冒落的Y型通风采空区气体分布特征[J].中国安全生产科学技术,2017,13(1):71-76.[doi:10.11731/j.issn.1673-193x.2017.01.012]
　GENG Xiaowei,LIU Yu,GUO Xiaoyang,et al.Laws of gas distribution in goaf with Y-type ventilation based on O-type caving[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2017,13(1):71-76.[doi:10.11731/j.issn.1673-193x.2017.01.012]
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基于“O”型冒落的Y型通风采空区气体分布特征
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
13
期数:
2017年1期
页码:
71-76
栏目:
现代职业安全卫生管理与技术
出版日期:
2017-01-31

文章信息/Info

Title:
Laws of gas distribution in goaf with Y-type ventilation based on O-type caving
文章编号:
1673-193X(2017)-01-0071-06
作者:
耿晓伟; 刘雨; 郭晓阳; 杨姗姗
辽宁工程技术大学 安全科学与工程学院，辽宁 阜新 123000
Author(s):
GENG Xiaowei;  LIU Yu;  GUO Xiaoyang;  YANG Shanshan
School of Safety Science and Engineering, Liaoning Technical University, Fuxin Liaoning 123000, China
关键词:
Y型通风; 非均质采空区; “O”型圈; 气体渗流; 数值模拟
Keywords:
Y-type ventilation;  heterogeneous goaf;  O-type ring;  gas seepage;  numerical simulation
分类号:
X936
DOI:
10.11731/j.issn.1673-193x.2017.01.012
文献标志码:
A
摘要:
为了掌握Y型通风采空区气体的分布规律，进一步为采空区瓦斯及火灾防治工作提供理论依据，基于采空区“O”型冒落压实和遗煤耗氧的非均匀性，针对Y型通风系统建立非均质采空区内气体渗流数值模型，采用Fluent数值模拟软件对采空区漏风流场和各组分气体浓度场进行模拟分析。结果显示：瓦斯和氧气浓度场在Y型通风采空区内大致呈“L”形分布；风流集中由工作面上、下隅角进入采空区；沿空留巷侧的瓦斯浓度高于运输巷侧，而氧气浓度却恰恰相反；两进一回的Y型通风方式能有效解决瓦斯在工作面上隅角积聚的问题；在采空区深部靠沿空留巷侧存在一个扇形的高瓦斯浓度区域，而该区域氧气浓度较低；采空区自燃危险区域在运输巷侧分布更广，应适当采取防火措施。
Abstract:
In order to master the laws of gas distribution in goaf with Y-type ventilation, and further provide theoretical basis for the gas and fire prevention work in goaf, a numerical model of gads seepage in heterogeneous goaf aiming at the Y-type ventilation system was established based on the O-type caving compaction and the heterogeneity of oxygen consumption by residual coal in goaf. The simulation analysis was conducted on the air leakage flow field and the gas concentration field of each component in goaf by using Fluent. The results showed that the gas and oxygen concentration fields in goaf with Y-type ventilation present the L-shaped distribution roughly. The air flow enters the goaf concentratedly from the upper corner and lower corner of working face. The gas concentration on the side of gob-side entry retaining is higher than that on the side of conveyor gateway, while the oxygen concentration is on the contrary. The Y-type ventilation mode with two intake and one return can effectively solve the problem of gas accumulation at the upper corner of working face. There exists a fan-shaped area with high gas concentration on the side of gob-side entry retaining in deep goaf, while the oxygen concentration is low in this area. The spontaneous combustion hazardous zone distributes more widely on the side of conveyor gateway in goaf, and the fire prevention measures should be adopted appropriately.

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备注/Memo

备注/Memo:
国家自然科学基金项目(51404128)
更新日期/Last Update: 2017-03-02