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(一)硫化矿石的氧化自燃 自燃火灾是开采某些硫化矿床时的重大灾害之一。关于硫化矿石的氧化自燃,当前主要倾向于“矿石氧化——升温聚热——发火自燃”的观点。氧化过程中,随着氧化作用的持续,热积聚不断增强;反过来又加快矿石的氧化速度。据对铜官山铜矿所作实验证明,硫化矿石的氧化速度是随温度的升高而加快的;硫化矿物不同,其氧化速度也不相同。
(I) Oxidized spontaneous combustion of sulphide ores is one of the major disasters when mining certain sulphide deposits. With regard to the oxidized spontaneous combustion of sulphide ores, the current tendencies are mainly toward the point of view of “ore oxidation - thermal heating and pyrolysis - pyrophoric spontaneous combustion”. Oxidation process, with the continued oxidation, heat accumulation continues to increase; in turn, speed up the oxidation rate of ore. According to experiments conducted at the Tongguanshan Copper Mine, the oxidation rate of sulphide ores is accelerated with increasing temperature; the sulphide minerals are different and their oxidation rates are not the same.