反底拱在软弱破碎围岩巷道底板控制中的应用  

Application of Inverse Bottom Arch in Floor Control of Roadway with Weak and Fractured Surrounding Rock

作　　者：陈盼 CHEN Pan(Xi'an Research Institute Co.,Ltd.,China Coal Technology and Engineering Group Corp.,Xi'an 710077,China)

机构地区：[1]中煤科工集团西安研究院有限公司,西安710077

出　　处：《煤炭技术》2020年第3期34-36,共3页Coal Technology

摘　　要：针对软弱破碎围岩巷道易发生底鼓的问题,分析认为软弱破碎围岩巷道由于围岩强度低,裂隙发育且可能受水的影响,不易在浅部形成承载结构,在"强顶强帮弱底"支护条件下,易发生底鼓。提出此类巷道支护应该把底板支护上升到和帮顶支护同等重要的位置,且要尽可能地使底板支护和帮顶支护协调统一起来,形成一个完整的承载体,从弥补巷道围岩承载力短板的角度出发,把反底拱应用到软弱破碎围岩巷道底板控制中,并通过工程实例,详细说明了反底拱的构建过程。Aiming at the problem of floor heave in weak and fractured surrounding rock roadway, the analysis shows that the floor heave is easy to occur in weak and fractured surrounding rock roadway because of the low strength of surrounding rock, the development of cracks and the possible influence of water, and it is not easy to form a bearing structure in shallow part. Under the condition of "strong roof, strong side and weak bottom" support, the floor heave is easy to occur. It is pointed out that the floor support should be raised to the same important position as the roof support, and the floor support and roof support should be coordinated as far as possible to form a complete bearing body. From the angle of making up the short slab of the bearing capacity of the surrounding rock of the roadway, the reverse floor arch should be applied to the floor control of the roadway with weak and fractured surrounding rock, and it is explained in detail through an engineering example. The construction process of inverted arch is discussed.

关 键 词：巷道支护 底板 底鼓 软弱破碎围岩 反底拱 

分 类 号：TD353[矿业工程—矿井建设]