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SONG Jin-quan~1, WANG Xu-guang~1, JIANG Xian-qiao~2, CAO Hai-feng~1, XIONG Dai-yu~1 (1. Beijing General Research Institute of Mining and Metallurgy,Beijing 100044,China; 2. Dalian 614 Chemical Engineering Co.Ltd.,Dalian 116400,China)  
From the general program on development of industrial explosive materials in China,present situation on the safety of permitted explosives for colliery in China was analyzed.The formulation,characteristics and preparation technology of the new powdered emulsion explosives permitted for colliery were expounded.Also,its application in underground gassy colliery was summarized.Results of tests show that the new industrial explosives have good explosion and safe performances and can meet the need for blasting in the corresponding gassy colliery in China.The cost analysis indicates that the permitted powdered emulsion explosive can bring a great economic benefit for plants and enterprises in which it is produced or used.
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