工作面顶板弧三角形悬板结构的形成机理与控制技术  

Formation mechanism and control technology of arc triangle hanging plate with curve side structure of coal mining face roof

作　　者：陈永斌[1] 袁超 Chen Yongbin;Yuan Chao(Guqiao Coal Mine,Huainan Mining Group,Huainan 232131,China;School of Resource Environment& Safety Engineering,Hunan University of Science&Technology,Xiangtan 411201,China)

机构地区：[1]淮南矿业集团顾桥矿,安徽淮南232131 [2]湖南科技大学资源环境与安全工程学院,湖南湘潭411201

出　　处：《黑龙江科技大学学报》2018年第2期142-147,180,共7页Journal of Heilongjiang University of Science And Technology

基　　金：煤矿安全开采技术湖南省重点试验室开发基金项目(201401)

摘　　要：为获得非固支或简支状态下采场基本顶的变形及断裂结构形态,建立两临边固支、两临边自由的弹性薄板力学模型,推导挠度解析式,并分析基本顶上下板面应力分布特征、断裂线发展轨迹及弧三角形悬板结构的形成机理。结合顾桥矿1125(1)工作面现场情况,提出预应力桁架锚索为主、锚杆+钢筋网等支护为辅的综合控制技术。结果表明,两临边固支、两临边自由采场工作面上端头实体煤侧边界处的断裂线呈弧形分布,形成上弧三角形悬板结构,在该结构的掩护下,工作面上端头顶板易形成下弧三角形悬板结构。应用新控制技术,1125(1)工作面上端头区域顶板形成的下弧三角形悬板结构可为人员及机械设备提供所需的安全空间。This paper is driven by the need for a deeper insight into the deformation and fracture morphology of the basic roof with non support or simple support.The research involves creating a mechanical model of elastic thin plate with two edges clamped and two limb free edges,deducing the analytic formula for deflection of the model,and analyzing the stress distribution characteristics of the basic top and lower plate surface and fracture mechanism line trajectory and the formation mechanism of arc triangle hanging plate with curve side structure;combined with the site conditions of the 1125(1)working face of Guqiao mine,developing the comprehensive control technology using truss and anchor rope as main body and bolt and steel mesh as a subsidiary part.The results show that the fracture line occurs with arc-shaped distribution at the side boundary of the upper end coal body of the two edges clamped and two limb free edges-namely an occurrence of an upper arc triangle hanging plate with curve side structure in such a way that a lower arc triangular suspension structure is more likely to take shape on the upper end roof of the working face.It follows that the lower arc triangle suspension structure benefiting from the application of the new control technology on the top end area of 1125(1)working face could provide the required safety space for personnel and mechanical equipment.

关 键 词：巷道压力 工作面上端头 弧三角形悬板 形成机理 控制技术 

分 类 号：TD325[矿业工程—矿井建设]