1. Key laboralory of Western Mine Exploration and Hacard Prevention, Ministry of Education, Xi' an Uninersity gf Science and Technlogy, Xi' an 710054, China:2. School of Safdy Science and Engineering, Xi' an Unitersity of Science and Technology, Xi' an 710054, China:3. Sichuan Prorincial Coal Industry Group Corporation Limited, Chengdu 610091, China

为得到煤仓自燃过程中高温点运移规律,预防煤仓自然发火事故的发生,运用漏风场和结构相似的大型煤低温自然发火试验台测试了松散煤体升温过程中高温点移动规律,并提出了"定期清理、降温减氧、监测监控"的综合防治措施。结果表明:高温点首先出现在煤仓高度3/5处,然后逐步在中心轴向着煤仓下部进风侧移动,同时沿着垂直中心轴朝东南向转变,最终停留在距进风侧较近的煤仓下部并向着煤仓边缘空隙率更大的位置发展。在低温阶段(100℃以内)、风量小于0.6 m3/h时,高温点在中心轴方向下降幅度更大;在高温阶段,高温点未随着风量的增大发生移动。

In onder to get the migration law of the high temperature point during the coal spontaneous combustion in the coal bunker and to prevent the coal spontaneous combustion accident occurred in the coal bunker, the large coal low temperature spontaneous combustion test rig with similar air leakage field and structure was applied to test the location migration law of the high temperature point during the temperature rising process of the bulk coal.A comprehensive prevention and control measures with "a periodic cleaning, temperature reduction and oxy-gen reduction, monitoring and control"were provided. The results showed that the high temperature point was at 3/5 of coal bunker height, then high temperature point would steadily move to the air income side at the coal bunker bottom along the central shaft of bunker. Mean-while, the high temperature point would change to the south east direction along the vertical central shaft, finally, it would be stayed at bottom of coal bunker near the air income side and would then develop to the location with higher edge space rate in the coal bunker. At the low tem-perature(within 100℃) stage, when the air volume was less than 0.6 m2/h, the high temperature point would be highly reduced along the central shaft. At the high temperature stage, the high temperature point would not migrate with the air volume increased.

国家自然科学基金资助项目(51404195)；中国博士后基金资助项目(2014M552466,2016M592820)；