采矿与安全工程学报2011，Vol.28Issue(3)：456-461,467,7.
煤实验最短自然发火期定量测定方法研究
The Quantitative Method for Measuring the Shortest Spontaneous Combustion Period
摘要
Abstract
The forecast of the shortest spontaneous combustion period for prevention and control of spontaneous combustion of coal is quite necessary. Based on the physical model of adia-batic cylindrical coal pillar, an experimental prediction model of coal spontaneous combustion is established. Using the measured parameters of coal spontaneous combustion, we calculate the model and accurately and test the shortest spontaneous combustion period in six different coal mines through analyzing the distribution of the factors affecting the air leakage rate and the size of coal on spontaneous combustion period. The results show that 1) the coal spontaneous combustion period decreases at first and then increases with the increase of the air leakage rate; 2) the air leakage rate for the shortest spontaneous combustion period increases linearly with the decrease of the size of coal; 3) the shortest spontaneous combustion period decreases at first and then increases with the increase on the size of coal; and 4) the greater the spontaneous combustion tendency of coal is, the shorter the spontaneous combustion period will be. Taking the Zhangji fat coal for instance, the size of coal for the shortest spontaneous combustion period is 1~3 mm, the air leakage rate for the shortest spontaneous combustion period is 0. 001 1 m/ s, and the experimental shortest spontaneous combustion period is 26 d.关键词
煤自然发火/最短自然发火期/最佳风速/最佳粒度/氧化放热强度Key words
spontaneous combustion of coal/ the shortest spontaneous combustion period/ the air leakage rate for the shortest spontaneous combustion period/ the size of coal for the shortest spontaneous combustion period/ oxidation heat release intensity of coal分类
矿业与冶金引用本文复制引用
杨永良,李增华,高思源,唐一博,刘震..煤实验最短自然发火期定量测定方法研究[J].采矿与安全工程学报,2011,28(3):456-461,467,7.基金项目
中国矿业大学青年科研基金项目(2009A006) （2009A006）
国家自然科学基金项目(50474067) （50474067）
