深埋煤层覆岩结构与支架工作阻力研究  

Study on overburden structure and working resistance of supports in deep buried coal seam

作　　者：刘洪涛[1] 韩洲 韩子俊 杨志华 何维胜 王斯晨 罗紫龙 LIU Hongtao;HAN Zhou;HAN Zijun;YANG Zhihua;HE Weisheng;WANG Sichen;LUO Zilong(School of Energy and Mining Engineering,China University of Mining and Technology(Beijing),Bejing 100083,China;Ningxia Institute of Coal Science and Technology Co.,Ltd.,Yinchuan 750000,China;Yangchangwan Coal Mine of Ningxia Coal Industry Co.,Ltd.,State Energy Group,Yinchuan 750011,China)

机构地区：[1]中国矿业大学(北京)能源与矿业学院,北京100083 [2]宁夏煤炭科学技术研究所有限公司,宁夏银川750000 [3]国家能源集团宁夏煤业有限责任公司羊场湾煤矿,宁夏银川750011

出　　处：《煤矿安全》2023年第7期171-177,共7页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(51774288,52004289)。

摘　　要：针对深埋煤层大采高工作面覆岩结构复杂,矿压现象强烈的特点,以羊场湾煤矿为工程背景,采用理论分析、相似模拟、现场实测等方法,建立羊场湾矿大采高覆岩结构力学模型,对大采高综放工作面覆岩结构的断裂和液压支架工作阻力进行综合性研究。研究表明:正常回采期间,基本顶未达到极限垮落距之前,直接顶和部分基本顶破断并不能充填采空区,以至工作面上方形成倒台阶式的“悬臂梁”结构,液压支架主要作用于防止悬臂梁结构发生回转失稳;来压期间,基本顶连同上部两岩层破断垮落充填采空区,工作面上方形成“砌体梁-悬臂梁”结构,液压支架一是提供防止直接顶“悬臂梁”结构发生回转失稳的压力,二是提供防止基本顶“砌体梁”结构回转的压力。In view of the characteristics of complex overburden structure and strong mining pressure in deep coal seam working face with large mining height,taking Yangchangwan Coal Mine as the engineering background,the mechanical model of overburden rock structure in Yangchangwan Mine with large mining height is established by using theoretical analysis,similarity simulation and field measurement,and the comprehensive research is carried out on the fracture of overburden rock structure and the working resistance of hydraulic support in fully mechanized caving face with large mining height.The results show that during the normal mining period,before the basic roof reaches the limit caving distance,the direct roof and part of the basic roof break cannot fll the goaf,so that the inverted step"cantilever beam"structure is formed above the working face,and the hydraulic support is mainly used to prevent the cantilever beam structure from rotary instability;during the period of pressure,the basic roof and the upper two rock strata break and collapse to fill the goaf,and a"masonry beam-cantilever beam"structure is formed above the working face.The hydraulic support provides the pressure to prevent the rotary instabilty of the direct roof"cantilever beam'structure,and the pressure to prevent the rotation of the basic roof"masonry beam"structure.

关 键 词：深埋煤层 大采高工作面 覆岩结构 支架工作阻力 矿压显现 

分 类 号：TD323[矿业工程—矿井建设]