摘要
以寺河矿采空区瓦斯抽放设计为例,建立了非均质采空区渗流-扩散的有限元数值模型,直观地描绘了采空区瓦斯涌出过程、瓦斯分布规律及其在采空区回风隅角瓦斯积聚的流体力学原理。模拟结果表明,在工作面后方利用回风联络巷依次进行漏风导流和瓦斯抽放,可大幅度降低采空区回风隅角瓦斯浓度;同时漏风导流可以充分抑制采空区瓦斯涌入工作面,并能够降低抽放巷道的配风量。针对高瓦斯矿井采空区瓦斯排放问题,提出了"边采边抽边排"的综合治理采空区瓦斯的设计方案,给出了瓦斯抽放最佳位置范围、抽放流量和导流风量最低临界限。
According to the design of goaf gas discharge in Sihe mine, the authors established the finite element numerical model for infiltration flow and diffusion in heterogeneous goaf. It can visually depict the gas emission course in goaf, the gas distribution rule and the hydrodynamics principle for gas accumulation in return corner of a goaf. The simulation result shows that by using return connected lane for air leakage diversion and gas discharge in proper order, we can reduce gas concentration in return corner greatly, at the same time, if the method is used properly, we may also fully restrain the gas in the goaf from swarming into working faces and reduce distributed air quantity of drainage roadways. To the gas discharge in goaf of high gas mines, the authors bring forward a design scheme:'discharging and drawing out gas while excavating coal', which can control goaf gas synthetically, and the optimum position range of gas drainage, drainage flux, and the lowest critical limit of the indicating air quantity are also given.
出处
《中国地质灾害与防治学报》
CSCD
2003年第3期71-75,80,共6页
The Chinese Journal of Geological Hazard and Control
基金
辽宁工程技术大学校基金资助项目(编号200237)
关键词
采空区风流
瓦斯
抽排放设计
数值模拟
矿井
airflow in goaf
gas emission
gas distribution
gas drainage and discharge design
numerical simulation.
