U型通风下采空区发火过程模拟研究与模型改进
发布时间：2018-11-05 18:16
【摘要】：为了解U型通风下采空区遗煤层自然发火过程中,不同时间的温度和升温区的变化,提出使用颗粒流理论为基础的模型。解决氧的等效、流动和与煤反应的3个基本问题,并用FISH予以实现。根据实际工况模拟得升温过程可分为3个阶段,并分析了6个发展时间的升温特征,得遗煤发火自燃过程中升温区的变化与氧气流动有很大关系。采集这6个时间的实际遗煤层温度,分析与模拟结果的差别,得到模型还应考虑割煤时在遗煤层内部产生裂隙。改进后模型结果虽与实际升温区变化仍存在一定差异,但在升温时间与温度的关系方面更为准确,升温区扩散程度也更为接近事实。
[Abstract]:A model based on particle flow theory is proposed to understand the change of temperature and temperature in different time during the spontaneous combustion of coal seams in goaf under U-type ventilation. Three basic problems of oxygen equivalence, flow and reaction with coal were solved and realized by FISH. According to the actual conditions, the heating process can be divided into three stages, and the characteristics of the six development time are analyzed. It is concluded that the variation of the heating zone in the spontaneous combustion process of the residual coal has a great relationship with the oxygen flow. After collecting the actual residual coal seam temperature for 6 hours and analyzing the difference between the results and the simulation results, it is concluded that the fracture in the residual coal seam should also be considered in the model. Although the results of the improved model are still different from the actual temperature range, the relationship between the heating time and the temperature is more accurate, and the diffusion degree of the temperature region is closer to the fact.
【作者单位】： 辽宁工程技术大学安全科学与工程学院;矿山热动力灾害与防治教育部重点实验室;大连交通大学辽宁省隧道与地下结构工程技术研究中心;辽宁工程技术大学力学与工程学院;
【基金】：国家自然科学基金(51274110,51474121,51274113);国家自然科学基金煤炭联合基金项目(U1261121)
【分类号】：TD752.2
[Abstract]:A model based on particle flow theory is proposed to understand the change of temperature and temperature in different time during the spontaneous combustion of coal seams in goaf under U-type ventilation. Three basic problems of oxygen equivalence, flow and reaction with coal were solved and realized by FISH. According to the actual conditions, the heating process can be divided into three stages, and the characteristics of the six development time are analyzed. It is concluded that the variation of the heating zone in the spontaneous combustion process of the residual coal has a great relationship with the oxygen flow. After collecting the actual residual coal seam temperature for 6 hours and analyzing the difference between the results and the simulation results, it is concluded that the fracture in the residual coal seam should also be considered in the model. Although the results of the improved model are still different from the actual temperature range, the relationship between the heating time and the temperature is more accurate, and the diffusion degree of the temperature region is closer to the fact.
【作者单位】： 辽宁工程技术大学安全科学与工程学院;矿山热动力灾害与防治教育部重点实验室;大连交通大学辽宁省隧道与地下结构工程技术研究中心;辽宁工程技术大学力学与工程学院;
【基金】：国家自然科学基金(51274110,51474121,51274113);国家自然科学基金煤炭联合基金项目(U1261121)
【分类号】：TD752.2
【参考文献】
相关期刊论文 前3条
1 刘伟;秦跃平;郝永江;桂天柱;;“Y”型通风下采空区自然发火数值模拟[J];辽宁工程技术大学学报(自然科学版);2013年07期
2 李林;姜德义;B.B. Beamish;;基于绝热实验活化能解算煤自然发火期[J];煤炭学报;2010年05期
3 崔铁军;马云东;王来贵;;基于PFC3D的露天矿边坡爆破过程模拟及稳定性研究[J];应用数学和力学;2014年07期
相关博士学位论文 前1条
1 杨永良;煤最短自然发火期测试及煤堆自燃防治技术研究[D];中国矿业大学;2009年
【共引文献】
相关期刊论文 前10条
1 朱红青;王海燕;和超楠;杨成轶;;氧体积分数影响煤低温氧化动力学参数实验[J];辽宁工程技术大学学报(自然科学版);2013年09期
2 吴宪;齐庆杰;董子文;周新华;;古山矿采空区危险区域划分方法比较[J];辽宁工程技术大学学报(自然科学版);2014年12期
3 黄优;王洪波;陈善乐;崔铁军;;基于颗粒流的U型通风下采空区发火过程模拟研究[J];矿业安全与环保;2015年01期
4 张辛亥;李青蔚;肖e，
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