综放采空区特性与氧浓度分布关系研究  

Research on Relations between Goaf Characteristic of Fully Mechanized Sublevel Caving Mining and Distribution of Oxygen Concentration

作　　者：郝朝瑜[1] 王继仁[1] 廉振山[1] 任仲久[1] 邓存宝[1] 

机构地区：[1]辽宁工程技术大学安全工程技术研究院,辽宁阜新123000

出　　处：《防灾减灾工程学报》2011年第3期323-328,共6页Journal of Disaster Prevention and Mitigation Engineering

基　　金：国家自然基金重点项目(50834002)资助

摘　　要：在现场束管监测实验的基础上,分析总结了综放采空区特性。根据计算流体力学原理,采用FLUENT数值模拟计算软件,针对综放采空区的不同特性,分别对采空区氧化带和窒息带的关键划分指标"氧浓度"进行数值模拟。将模拟结果与实测结果进行比较,讨论了在考虑综放采空区不同特性情况下的数值模拟结果对采空区自燃"三带",即"散热带"、"氧化带"和"窒息带"划分的影响。结果表明,综放采空区特性对于氧浓度分布起着非常重要的作用,在数值模拟过程中必须予以考虑;忽略采空区特性的数值模拟结果与实测结果存在较大差异;模拟结果的精确与否取决于对问题的了解程度和边界条件的设定精度。By use of the experiment of bundle tube monitoring on site,the characteristics of fully mechanized sublevel caving mining goaf were analyzed and summarized.Based on the principle of computational fluid dynamics and numerical simulation software FLUENT,the oxygen concentration field,i.e.the key delimiting index of oxidation zone and suffocative zone,was simulated for the different characteristics of fully mechanized sublevel caving mining goaf.The simulation results were compared with experimental results. Considering the different characteristics of goaf,the influence of numerical simulation results on division of＂Three Zones＂（heat dissipation zone,oxidation zone and suffocative zone）of goaf was discussed. Results show that the characteristics of fully mechanized sublevel caving mining goaf play a very important role in concentration distribution of oxygen and must be considered in the numerical simulation process. Numerical simulation,which ignores the characteristics of goaf,is quite different from experimental results. Whether or not the simulation results are accurate depends on understanding of the problem and setting precision of boundary conditions.

关 键 词：综放开采 采空区特性 数值模拟 自燃“三带” 

分 类 号：TD822[矿业工程—煤矿开采]