王家山煤矿急倾斜煤层综放设备选型及回采工艺

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

为了确定急倾斜煤层走向长壁综放开采"三机"(液压支架、采煤机和刮板输送机)配套选型及安全可靠的回采工艺,针对王家山煤矿急倾斜煤层赋存条件及开采技术特点,采用三维数值模拟,分析了采场围岩与支架受力过程,顶板及顶煤破坏变形特征,结合工作面设备防倒防滑需要,初步确定"三机"选型。通过现场实践,确定了ZF4800/16/30型2柱支撑掩护式支架为主体的"三机"配套,总结出了由上向下割煤、由下向上推刮板输送机并移架、由下向上放顶煤的回采工艺。

In order to determine the matched equipment selection of the hydraulic powered support,coal shearer and face conveyor and the safety reliable mining technique 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 technical 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 coal 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 equipment 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.