大巷穿采空区时锚网喷与组合框架联合支护技术  

The combined support technology of bolt-mesh-shotcrete and composite frame during main roadway crossing goaf

作　　者：谢生荣[1,2] 郜明明[1] 陈冬冬[1] 宋宝华[1] 黄瑜[1] 王志坤[1] XIE Shengrong GAO Mingming CHEN Dongdong SONG Baohua HUANG Yu WANG Zhikun(Faculty of Resource and Safety Engineering, China University of Mining ＆ Technology （Beijing）, Beijing 100083, China Beijing Key Laboratory of Precise Mining oflntergrown Energy and Resources, China University of Mining ＆ Technology （Beijing）, Beijing 100083, China)

机构地区：[1]中国矿业大学(北京)资源与安全工程学院,北京100083 [2]中国矿业大学(北京)共伴生能源精准开采北京市重点实验室,北京100083

出　　处：《采矿与安全工程学报》2017年第4期698-706,共9页Journal of Mining & Safety Engineering

基　　金：国家自然科学基金项目(51234005;51504259);中央高校基本科研业务费专项资金项目(2010QZ06)

摘　　要：针对资源整合矿井改扩建过程中面临大巷穿采空区时的围岩控制难题,提出在采空区顶板采用强力锚网喷支护系统和在采空区内采用钢筋混凝土-钢梁组合框架系统进行围岩控制与空间构建,并阐明裂隙发育区锚杆(索)控制与钢筋混凝土立柱减跨支撑的联合支护机理。研发的钢筋混凝土-钢梁组合框架系统是以H型钢筋混凝土立柱与纵梁以及顶板横钢梁组成的空间框架结构为主体,辅以经纬网、水泥板、缓冲材料、砖墙以及混凝土喷层等形成,具有立柱强支撑、顶板抗冲击、巷道隔绝空间构建等功能,并采用力学方法计算了立柱支撑前后顶板梁弯矩变化、立柱支撑能力以及立柱所受弯矩与支撑能力的关系。结合现场地质生产条件与工程经验,确定了大巷过采空区时锚网喷与组合框架联合支护方案与工艺流程以及相应安全技术措施,实践效果良好。In view of the surrounding rock control problems during main roadway crossing goaf period in the process of resource integration and mine transformation and expansion,an intensive support system of bolt-mesh-shotcrete on goaf roof and a reinforced composite frame system of concrete-steel beam in goaf were proposed to control surrounding rock and build roadway space,and the combined supporting mechanism of anchor cable and reinforced concrete pillar in the fracture zone was fully explained.The composite frame system of reinforced concrete and steel beam developed takes the space frame structure of H-shaped reinforced concrete pillar,stringer and horizontal steel beam in the roof as the main body,with the complement of anchor graticule,concrete panel,cushion material,brick wall and concrete spray layer.The composite frame system has main functions of strong support of pillars,impact resistance in the roof,isolated space construction in the roadway,etc.Also,a mechanical calculation method was employed to work out the changes in the roof beam bending moment before and after pillar support,the supporting ability of reinforced concrete pillar,and the relationship between bending moment and support capacity of the pillar.Combining the geological production conditions on site and engineering experience,the scheme and process flow of the combined support of bolt-mesh-shotcrete and composite frame during main roadway crossing goaf with corresponding safety technological measures were determined and achieved good results in practice.

关 键 词：裂隙岩体强力控制 钢筋混凝土-钢梁框架系统 立柱减跨支撑 巷道空间构建 

分 类 号：TD266[矿业工程—矿井建设]