Equipment Selection and Mining Technique of Fully Mechanized Top Coal Caving Mining in Steep Inclined Seam of Wangjiashan Mine

In order to determine the matched equipment selection of the hydraulic powered support, coal shearer and face conveyor and the safety reliable mining t echnique for the fully mechanized strike top coal caving mining in the steep inclined seam, according to the steep inclined seam deposit conditions and the mining tech nical features in Wangjiashan Mine, a 3D numerical simulation was applied to analyze the stressed process of the surrounding rock and the powered supports in the Co al mining face and analyze the failure deformation features of the roof and top coal.In combination with the anti falling down and anti sliding requirements of the equipm ent applied in the coal mining face, the selection of the hydraulic powered support, coal shearer and face conveyor was preliminarily determined.With the site practices, the ZF4800/16/30 two leg chock-shield powered support was determined as the main part of the above three machine matched equipment.A mining technique including coal cutting from the upward to downward, the conveyor and powered support moving from downward to upward and the top coal caving from the downward to upward was summarized.