The intensity of air leakage not only increases the risk of spontaneous combustion of coal. but also is the cause of coal fire disasters caused by spontaneous combustion of coal left in the goaf. Aim to find the influence of the air leakage intensity on the spontaneous combustion characteristics of the remaining coal when the fire zone is opened. the coal spontaneous combustion charac... https://homehardware4ues.shop/product-category/pulls/