超千米深井巷道围岩变形破坏时空演化规律实验研究  

Time-space evolution pattern simulation experiment of surrounding rock deformation and destruction for super kilometer deep shaft roadway

作　　者：张辉[1,2,3] 李国盛 蒋帅旗[1] ZHANG Hui;LI Guo-sheng;JIANG Shuai-qi(School of Energy Science and Engineering,Henan Polytechnic University,Jiaozuo 454000,Henan,China;Collaborative Innovation Center of Coal Work Safety,Henan Province,Jiaozuo 454000,Henan,China;Henan Key Laboratoryfor Green and Efficient Mining &Comprehensive Utilization of MineralResourees,Henan Polytechnic University,Jiaozuo 454000,Henan,China)

机构地区：[1]河南理工大学能源科学与工程学院,河南焦作454000 [2]煤炭安全生产河南省协同创新中心,河南焦作454000 [3]河南省矿产资源绿色高效开采与综合利用重点实验室,河南焦作454000

出　　处：《实验力学》2018年第6期979-986,共8页Journal of Experimental Mechanics

基　　金：河南省科技厅科技攻关项目(182102310005);河南省教育厅科技攻关项目(15B440002)

摘　　要：针对超千米深井巷道围岩大变形破坏的难题,通过相似模拟实验,分析了巷道周围的应力应变演化规律和倾角对巷道稳定性的影响,揭示了超千米深井巷道变形破坏时空演化规律。实验结果表明:由于岩层倾角的存在,巷道底板两角出现应力集中现象。随外界载荷的增大,巷道拱部左上角与底板右下角首先发生破坏,随后向围岩深部扩展,且出现大范围变形破坏,巷道左帮和右帮应力集中现象加剧;巷道围岩各位置处产生的位移量差别较大,巷道拱部与底板产生位移量较大,两帮位移量相对较小,巷道变形量最大的位置达到30mm以上;超千米深井巷道围岩变形破坏特征分为3个阶段:缓慢变形阶段、剧烈变形阶段和严重变形破坏阶段,巷道围岩产生大变形非对称性破坏,且破坏范围较大,顶底板最大破坏深度达到34mm,巷道围岩失去承载能力,巷道空间完全封闭。将上述实验结果应用于工程实践,提出华丰煤矿超千米深井巷道全断面高强预应力锚网支护,特殊部位加强支护的方案,达到了理想的效果。Aiming at the difficult problem of large deformation and destruction of surrounding rock in super-kilometer deep shaft roadway,the influence of surrounding rock stress and strain evolution and rock dip angle on roadway stability was analyzed by similar simulation experiment.The time-space evolution pattern of deformation and destruction in super-kilometer deep shaft roadway is revealed. Experimental results indicate that due to the existence of rock dip angle,stress concentration appears at the two corners of roadway bottom floor.With the increase of external load,the upper left corner of arch and roadway bottom right corner are destroyed at first,and then extend to deep surrounding rock.Large scale deformation and destruction appear in surrounding rock of roadway.The stress concentration on both left and right sides of roadway intensifies.The displacement quantity of roadway surrounding rock at each position is quite different,the displacement quantity of both arch and roadway floor is larger,the displacement quantity at both sides is.relatively small,the maximum deformation quantity is more than 30mm.The deformation and destruction characteristics of surrounding rock in super-kilometer deep shaft roadway can be divided into three stages:slow deformation stage,severe deformation stage and severe deformation and destruction stage.The surrounding rock of roadway produces large deformation and asymmetric destruction,and the destruction range is large.The maximum damage depth of roof and floor is up to 34mm,the surrounding rock of roadway loses its bearing capacity,and roadway space is completely closed.By applying above experimental results to engineering practice,the scheme of full section high strength prestressed bolting net support and strengthening support in special part of super-kilometer deep shaft roadway in Huafeng Coal Mine was put forward,which has achieved an ideal effect.

关 键 词：超千米深井巷道 大变形 相似模拟 时空关系 

分 类 号：TD76[矿业工程—矿井通风与安全]