MOE Key Lab of Mining and Disaster Prevention and Control in Western Mine of China,Xi'an University of Science and Technology Yankuang Group Corporation Limited

为了掌握高地温环境对煤自燃的影响规律,基于程序升温试验,测试分析了恒温40℃处理后升温煤样和常温条件下升温煤样的自燃特性参数,并利用CO浓度随温度变化求解煤体表观活化能的计算模型,对比分析了2组煤样在不同温度阶段的表观活化能变化规律。试验结果表明:高温处理后升温的煤样耗氧速率、CO产生率、CO2产生率和极限放热强度均高于常温条件下升温的煤样,且随着温度的升高该趋势越发明显,同时,其表观活化能均低于常温条件下升温煤样,尤其在低温阶段差异较大,表观活化能更低,说明高温环境导致煤体氧化放热性增强,氧化反应所需能量更低,同等条件下氧化反应速度更快,更容易氧化升温发生自燃,自燃危险性增大。

in order to understand the infuence law of high geo- temperature environment to coal spontaneous combustion.based on programmed temperature rising fest.the paper ha a test and analysis on the spontaneous combustion features and parameters of temperatre risen coal samples afer 40 ‘C constant temperature treatment or normal temperature cond tton.wih the appication of calculation model of Co density varied with temperature to sowve coal mass apparent acivaton energy,the apparent acivation energy varation law of the two group coal samples under diferent temperature stage were compared and analyze .the test resultshowed that oxygen consumpton rate,CO production rate,CO2 production rale and linit heat reasing strengh of the temperature risen coal samples aer igh temperature re atment would be higher t han the temperature risen coal samples under normal temperature and withthe temperature rsing,the tendeney would be more obvious Meanwhile the apparent activation energy would be lower than temperatre rsen coal samples under ormal emperaure and espeially hedfference would be hig her at low temperature stage,the apparent acivation energy woult be lowe,.which showed that igh temperature nvironment would cause high oxidization heat reasing from coalmass. The energy required to the oxidized reaction would be lowe. Akt the same condtion,oxidzation reacion speed would be fast would be easly oxidized and temoperature risen to cause spontaneous combustion,thus the spontaneous combustion danger would be increased.

国家自然科学基金青年基金资助项目(51204135)；中国博士后基金资助项目(2015M570625)；