摘要
为解决双柳矿大断面巷道受掘进、采动等影响围岩变形量大、变形速度快等问题,采用井下调研、机理分析、数值模拟等综合方法,对大断面回采巷相关支护技术进行了研究,提出了适用于双柳矿深部大断面巷道的支护设计方案。结果表明:采用高强锚杆和高预应力锚索形成巷道支护结构的主体是提高支护强度的主要途径;拱形托盘有利于提升锚杆、锚索预应力的扩散,同时可提高锚杆索的综合承载力,用拱形托盘代替平托盘可实现锚杆索协同支护,从而提升巷道整体支护强度。
Affected by excav ation and mining,large and fast deformation of surrounding rock occurs in the large section road way in Shuangliu Mine.A series of compre hen sive methods,such as underground investigation,mechanism analysis,and numerical simulation,were used to study the relevant support technology.And a support design for the deep large-section roadway was proposed.Studies have shown that high-strength anchors and high-prestressed cables can con-struct the main support structures,which could be the main ways to improve the support strength.Arched tray is conducive to the spread of the prestress of the anchors and cables,and.increases their bearing capacity.The arched tray replaces the flat tray to realize the cooperative support of the anchor cable,thereby improving the overall support strength of the roadway.
作者
王建军
WANG Jianjun(Shangliu Mine,Fenxi Mining Group.Shanxi Coking Coal(Group)Co.,Ltd.,Liulin 033300,China)
出处
《山西煤炭》
2020年第2期38-41,共4页
Shanxi Coal
关键词
大断面
锚杆锚索
支护设计
拱形托盘
large section
anchor and cable
support design
arched tray
