深部高应力富水软岩巷道底鼓机理及控制技术  

Floor heave mechanism and control technology of deep high stress water-rich clay soft rock roadway

作　　者：王文利 孙亮明[2] WANG Wenli;SUN Liangming(School of Transportation Engineering,Wuhan Transportation Vocational College,Wuhan 430065,China;School of Civil Engineering and Architecture,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]武汉交通职业学院交通工程学院,湖北武汉430065 [2]武汉理工大学土木工程与建筑学院,湖北武汉430070

出　　处：《矿业安全与环保》2021年第4期55-59,67,共6页Mining Safety & Environmental Protection

基　　金：国家自然科学基金项目(51608410)。

摘　　要：针对深部高应力富水软岩巷道底鼓问题,以胡底矿盘区水泵房为工程背景,分析了盘区水泵房底板变形特征及影响因素,采用UDEC离散元模拟软件对硐室掘进期间的围岩应力状态、位移模式及破坏形式进行分析,研发了适合在富水环境中使用的锚杆(索)新型防水锚固剂FS2350,该锚固剂具有良好的锚固效果。研究结果表明:水泵房在高应力和富水环境下呈现挤压流动性和膨胀性底鼓,底鼓呈全区域、持续性和连锁性等变形特征。底板锚注支护可有效提高煤岩体的物理力学特性,抑制底板岩层剪切破坏,控制破碎区进一步向深部转移,减小底板岩层破坏范围,改善了底板围岩的受力状态。锚注支护后,底板支护系统处于稳定状态,90 d后底板最大变形量为23 mm,有效解决了深部高应力硐室底鼓问题。Aiming at the problem of floor heave in deep soft rock roadway with high stress and rich water,taking the water pump house in the panel area of Hudi Mine as the engineering background,this paper analyzes the deformation characteristics and influencing factors of the water pump house in the panel area,UDEC discrete element simulation software is used to analyze the stress state,displacement mode and damage mode of the surrounding rock during chamber excavation,a new type waterproof anchoring agent FS2350 of rockbolt(anchor cable)suitable for use in water rich environment has been developed,this anchoring agent has good anchoring effect.The results show that:the pump house under high stress and rich water environment presents extrusion fluidity and expansibility floor heave,and the floor heave presents the deformation characteristics of whole region,continuity and chain.The floor bolting and grouting support can effectively improve the mechanical properties of the coal and rock mass,inhibit the shear failure of the floor strata,control the further transfer of the broken zone to the deep,reduce the damage range of floor strata,and improve the stress state of the floor surrounding rock.After bolting and grouting support,the floor support system is in a stable state,and the maximum deformation of the floor is 23 mm after 90 d,which effectively solves the problem of floor heave in deep high stress chamber.

关 键 词：深部巷道 强烈底鼓 锚注支护 富水软岩 巷道支护 

分 类 号：TD322[矿业工程—矿井建设]