综放面采空区遗煤自然发火特点及环境分析

Analyzing on Surroundings and Characteristics of Coal Self-Ignition in Goaf in a Fully Mechanized Top-Coal Caving Face

根据综采放顶煤开采技术的开采特点及现场调查和观测,总结出综采放顶煤工作面采空区自然发火的主要特点。在分析综放开采条件下采空区煤体所处环境的基础上,通过对采空区浮煤厚度、松散煤体空隙率、采空区漏风强度、工作面推进速度、采空区围岩原始温度等关键因素的分析研究,指出采空区遗煤所处环境的变化将会引起浮煤自燃过程的动态变化。

The goaf in a fully mechanized top - coal caving face was one of the areas in which coal self - ignited in mine easily. According the characteristics of fully mechanized top - coal technique and investigation and observation, the main characteristics of coal selfignition in goaf in a fully mechanized top - coal caving face was summarized. Based on analyzing the environment of goaf, though analyzing the key factors, such as float coal thickness, intensity of air leakage, temperature, the theory that dynamic changes of coal selfignition process caused by surroundings of goaf was pointed out. Along with working face pushing, the factors which influent coal self - ignition would change, such as float coal thickness, intensity of air leakage, etc. Thereby thermal storage and heat production would change. Parts of conclusion were fulfilled for further perfecting spontaneous combustion theory and control technology, and the conclusion has provided new ways and means for fire forecasting in goafs.