Abstract: Since 2011,Dongming opencast coal mine has carried on the research and exploration to the mining technology of the steep side coal in the process of production practice step by step.In order to explore the effective application of the control mining technology of the steep slope in Dongming open pit coal mine,an in-depth study has been carried out in 2017 in all-round way.In this paper,the geological conditions,exposure time and safety factor of the southern slope are analyzed,monitored and calculated on the spot.Only 2018 more than three hundred and sixty two thousand five hundred and ninety nine tons of coal production,creating a direct economic value of 54.39 million yuan.The successful application of the control mining technology in Dongming opencast coal mine has greatly improved the economic benefit and comprehensive mining level of coal resources.

Key words: Opencast coal mine, Southern end side, Steep slope control mining technology, Economic benefit, Mining level