华亭煤矿综放工作面合理采高及放煤工艺分析  

Determination on Reasonable Mining Height and Top Coal Caving Technology in Huating Coal Mine

作　　者：乔中栋 屈英[1] 杨国宏 刘彪 QIAO Zhongdong;QU Ying;YANG Guohong;LIU Biao(Huating Coal Mine of Huating Coal Industry Group,Huating 744100,China;Xiashijie Coal Mine,Tongchuan Mining of Shaanxi Coal and Chemical Industry Group Co.,Ltd.,Tongchuan 727101,China)

机构地区：[1]华亭煤业集团华亭煤矿,甘肃华亭744100 [2]陕煤铜川矿业有限公司下石节煤矿,陕西铜川727101

出　　处：《煤矿安全》2020年第11期161-164,共4页Safety in Coal Mines

摘　　要：针对华亭煤矿250107-1综放工作面现阶段面临的煤壁片帮、冒顶及顶煤回收率低等问题,通过FLAC3D数值分析与理论计算相结合的方法,综合分析采高、放煤步距及放煤方式对综放工作面煤壁稳定性与顶煤回收率的影响。结果表明:当采高为3.5 m,采放比为1∶2.66时,可以较好的利用煤体自身的承载能力,有效缓解煤壁片帮灾害;通过放煤步距与放煤方式的相互配合,当选取放煤步距为0.8 m且采用多轮间隔放煤方式时,华亭煤矿250107-1综放工作面可实现最优配置,顶煤回收率可以达到81.9%。In view of the problems, such as coal wall spalling, roof caving and low recovery rate of top coal in 250107-1 fully mechanized caving face of Huating Coal Mine at present, the method of combining FLAC3Dnumerical analysis and theoretical calculation was used to comprehensively analyze the mining height, coal mining step, and the effect of coal mining method on the stability of coal wall and the recovery rate of top coal in fully mechanized top coal caving face. The results show that when the mining height is 3.5 m and the mining to caving ratio is 1 ∶2.66, the bearing capacity of the coal body can be better used to effectively alleviate the disaster of the coal wall;through the coordination of the caving step and the caving method, the best configuration can be achieved in 250107-1 fully mechanized caving face of Huating Coal Mine when the selected caving step is0.8 m and the multi-interval caving is adopted, and the top coal recovery rate can reach 81.9%.

关 键 词：综放开采 采高确定 应力分布 放煤工艺 顶煤回收率 

分 类 号：TD823.49[矿业工程—煤矿开采]