摘要
为了防止采空区自然发火,必须了解其发生机理。依据不规则介质采场渗流理论,通过数值模拟和相似材料模拟实验,反映出真实采空区中气体的运移规律,得出采场通风时,工作面两端的压差是造成采空区漏风及遗煤自燃的主要原因。通过对上隅角瓦斯进行合理的抽放,将瓦斯浓度控制在合理的范围内,便可避免为稀释上隅角瓦斯而加大工作面风量所造成的采空区自然发火。
In order to prevent spontaneous combustion in the goaf,we must understand the mechanism of its occurrence.Based on percolation theory of irregular medium stope,through numerical simulation and similar material simulation experiments,the law of motion of gas is reflected in the actual mined-out area.We learned that the pressure difference at both sides of the face is a main reason for the air leakage and spontaneous combustion of coal which was left in the mined-out area.Through the reasonable gas drainage,the concentration of the gas can be controlled at a reasonable range,so we could avoid the spontaneous combustion which was caused by the large ventilation which was used to reduce the gas concentration in the upper corner.
出处
《辽宁工程技术大学学报（自然科学版）》
CAS
北大核心
2010年第A01期8-10,共3页
Journal of Liaoning Technical University (Natural Science)
基金
国家自然科学基金资助项目(50774041)
中国博士后科学基金资助项目(2005038253)
辽宁省教育厅计划基金资助项目(2004C034)
关键词
采空区自然发火
漏风
上隅角
数值模拟
相似材料模拟
spontaneous combustion of goaf
ventilation leakage
upper corner
numerical simulation
similar material simulation
