联排反底拱-底板桩底鼓控制技术数值分析  

Numerical analysis of floor heave control technology of combined inverted arch-floor pile

作　　者：郭东明[1] 王泽天 亢鑫超 陈麒宇 颜浩 张思博 郝文倩 GUO Dongming;WANG Zetian;KANG Xinchao;CHEN Qiyu;YAN Hao;ZHANG Sibo;HAO Wenqian(School of Mechanics and Civil Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China)

机构地区：[1]中国矿业大学(北京)力学与建筑工程学院,北京100083

出　　处：《煤矿安全》2022年第12期210-217,共8页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(51974315)。

摘　　要：为解决深部软岩巷道的底鼓控制问题,以兴安矿四水平南18层轨道巷为工程背景,提出了1种新型底鼓控制技术——联排反底拱-底板桩;运用ABAQUS软件对联排反底拱-底板桩进行数值分析,研究了其承载能力和变形情况;运用FLAC^(3D)软件对联排反底拱-底板桩的底鼓控制效果进行分析,探讨了联排反底拱-底板桩的底鼓控制机理,揭示了矢跨比对联排反底拱-底板桩底鼓控制效果影响的规律。结果表明:在均布载荷作用下,联排反底拱应该适当增加跨中部位的连杆数量和强度;联排底板桩应该适当增加嵌固端的长度和强度;联排反底拱-底板桩中底脚套管十分关键,应该适当增强底脚套管的强度;联排反底拱-底板桩矢跨比的合理范围为0.225~0.250。In order to solve the problem of floor heave control in deep soft rock roadway,based on the engineering background of the 18th floor track roadway in the south of the fourth level of Xing’an Mine,a new type of bottom heave control technology,that is combined inverted arch-floor pile.The numerical analysis of combined inverted arch-floor pile was carried out by ABAQUS software,and its bearing capacity and deformation were studied.Through the FLAC^(3D)software,the floor heave control effect of the combined inverted arch-floor pile is analyzed,the bottom heave control mechanism of the combined inverted arch-floor pile is discussed,and the influence of the rise-span ratio on the floor heave control effect of the combined inverted arch-floor pile is revealed.The result shows that under the action of uniform load,the number and strength of connecting rods at the mid-span should be appropriately increased in the combined inverted arch.The length and strength of the embedded end should be appropriately increased.The bottom casing in the combined inverted arch-bottom pile is very important,and the strength of the bottom casing should be appropriately increased.The reasonable range of the rise-span ratio of the combined inverted arch-floor pile is 0.225-0.250.

关 键 词：底鼓控制 联排反底拱-底板桩 支护机理 数值分析 钢管混凝土 

分 类 号：TD327.3[矿业工程—矿井建设]