深井大断面煤巷双锚索桁架控制系统的研究与实践  

STUDY OF DOUBLE-CABLE-TRUSS CONTROLLING SYSTEM FOR LARGE SECTION COAL ROADWAY OF DEEP MINE AND ITS PRACTICE

作　　者：严红[1] 何富连[1] 徐腾飞[1] 

机构地区：[1]中国矿业大学资源与安全工程学院,北京100083

出　　处：《岩石力学与工程学报》2012年第11期2248-2257,共10页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家重点基础研究发展计划(973)项目(2010CB226802);中央高校基本科研业务费专项资金资助(2010YZ02)

摘　　要：针对深井大断面煤巷围岩支护过程中出现的顶帮大变形控制难题,综合现场调研、数值模拟、理论分析、井下试验及现场实测,分析围岩变形破坏特征,提出高应力大断面巷道围岩控制系统——双锚索桁架,并对其组成结构、控制机制、支护优越性、应力场分布特征、关键支护参数等进行系统化研究,得出:(1)深井大断面煤巷围岩变形特征为:移近量大、敏感系数高、变形具有持续性及破坏针对性强;(2)新型双锚索桁架控制系统在巷道围岩中形成厚承载层和梯次锚固体结构,提高锚固岩层抗拉(剪)强度,保障巷道围岩和支护结构的稳定性;(3)模拟得出双锚索桁架在岩层中形成垂直顶板(帮)均匀预应力带,预应力分散度低,影响范围集中于锚索锚固点区域3～5 m处;(4)详细介绍井下运用双锚索桁架控制系统的一典型深井大断面煤巷成功实例。研究成果在邢东矿区获得全面应用,对类似条件工程的支护技术具有一定的理论意义和实用价值。Aiming at the controlling problem of the large deformations in the roof and coal sides in the process of surrounding rock support in large section coal roadways of deep mine,combining with the field investigation,numerical simulation,theoretical analysis,field test and field monitoring,the deformation failure characteristics of surrounding rock are analyzed.Then,a surrounding rock controlling system for large section roadway called double-cable-truss（DCT） is put forward.The composition structure,controlling mechanism and supporting superiority of DCT,stress field distribution characteristics of surrounding rock and key supporting parameters,etc.are researched systematically.The research results are as follows：（1） The deformation characteristics of large section coal roadways of deep mine are of large displacement,high sensitivity coefficient,continuous deformation and strong pertinence of failure.（2） Thick load bearing layer and rundle anchor structure in the surrounding rock of roadway are formed when using the new double-cable-truss controlling system.It could improve tensile and shear strength and ensure the surrounding rock and supporting structure to be stable.（3） The simulation results show that the vertical and uniform prestressed belts to the roof or two sides can be formed by the DCT.The stress dispersion degree is low and the effect range is 3–5 m.（4） A typical successful case of DCT application to large section coal roadway of deep mine is introduced in detail.The research achievements are applied to Xingdong mining area,which have great theoretical and practical values to similar roadway supports.

关 键 词：采矿工程 深井 双锚索桁架控制系统 煤巷 

分 类 号：TD35[矿业工程—矿井建设]