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介绍开滦生产的三级煤矿许用乳化炸药的技术性能、安全性和在高沼气、有煤与沼气突出矿井的应用情况。
Describe the technical performance, safety and application of emulsified explosives permitted by three coal mines produced in Kailuan, and the application of coal and biogas in outburst mines in high biogas.