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Study on the Comprehensive Technology of Presupporting of Roof and Walls in Tailings Back-fill Mining

Mao Shilong Yang Peng Cai Sijing Zhao Haiyun(University of Science and Technolgy Beijing)  
To increase the mining capacity of Hedong Gold Mine,study was made on a new mining method at the mine,that was tailings back fill mining with roof presupporting and sublevel open stoping.The new method adopted roof presupporting,deep and medium hole blasting,LHD ore removal and tailings filling.One time blasting of deep and medium holes was applied for the cut through raise and smooth surface blasting was used for the stope periphery and upper wall to ensure the stope safety.To ensure a smooth test,comprehensive technical measures for roof and wall supporting were taken.
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