Release laws of CO produced by coal structure destruction under mechanical force and modification method of the index for predicting coal spontaneous combustion
YU Minggao
XIE Junjie
JIA Hailin
Abstract：In order to make clear the release laws and release amount of CO which is produced by the coal structure destruction under mechanical force,a self-designed crushing experimental equipment was used to conduct the coal crushing experiment,and three factors were concerned:the quality of coal sample,the speed of motor and the crushing atmosphere.The experimental results show that the rise rate and occurrence time and absolute amount of CO concentration all increase with the increasing of the quality of coal sample and the speed of motor.The average rise rate of CO concentration in air atmosphere is higher than it in nitrogen atmosphere.In 4 minutes' crush,the absolute amount of CO produced by the coal structure destruction under mechanical force has a linear relation with the quality of coal sample.Based on the experimental results,a working face model was established and a calculation formula of CO produced by the coal structure destruction under mechanical force during the drop process was derived.The calculation result can be used to modify the forecast index of coal spontaneous combustion.
Keywords：secondary COcoal structuremechanical disruptionrelease lawsmodification method
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 762-768 )