煤层露头自燃火灾演化规律数值模拟研究

发布时间：2018-06-23 06:36

本文选题：煤层露头 + 自燃火灾　；参考：《中国安全生产科学技术》2017年03期

【摘要】：为解决煤层露头自燃所引起的资源浪费和环境污染,以新疆台勒维丘克煤层露头为研究对象,采用数值模拟方法研究煤层露头在火风压、火风压及外部风压作用下的自燃演化规律,为治理火区和保护环境提供依据。研究表明:火风压作用下,风流最大流动速度0.729 m/s,火风压最大达到170.2 Pa;火风压与外部风压联合作用下,煤层露头动力系统是负压通风系统,在漏风速度为0.2 m/s时,研究5个典型位置的温度、氧浓度、速度及压力的变化规律;并分析孔隙率、漏风速度对煤层露头自燃火灾的影响,说明大孔隙和漏风供氧为火灾大规模发展提供有利条件。研究成果对治理火区及保护生态环境奠定坚实基础。
[Abstract]:In order to solve the waste of resources and environmental pollution caused by outcrop spontaneous combustion in coal seam, the outcrop of Tilevechuk coal seam in Xinjiang is taken as the research object, and the numerical simulation method is used to study the wind pressure of coal outcrop in the fire. The evolution law of spontaneous combustion under the action of fire wind pressure and external wind pressure provides the basis for controlling fire area and protecting environment. The results show that under the action of fire pressure, the maximum velocity of air flow is 0.729 m / s, and the maximum of fire pressure is 170.2 Pa.Under the combined action of fire pressure and external wind pressure, the outcrop power system of coal seam is a negative pressure ventilation system, when the air leakage velocity is 0.2 m / s, The changes of temperature, oxygen concentration, velocity and pressure in five typical locations are studied, and the effects of porosity and air leakage velocity on spontaneous combustion of outcrop in coal seam are analyzed. The results show that macroporosity and air leakage provide favorable conditions for the large-scale development of fire. The research results lay a solid foundation for the management of fire areas and the protection of the ecological environment.
【作者单位】：辽宁工程技术大学矿业学院;辽宁工程技术大学安全科学与工程学院;北京科技大学土木与资源工程学院;大同煤矿集团有限责任公司;
【基金】：国家自然科学基金项目(51574143,51404127)
【分类号】：TD752.2

【相似文献】