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| Research on graded support technology for coal seam bifurcation area in Jintong Mine |
| Wang Junfeng, Liu Yitao, Hao Xiaowei, Yao Wei |
| Erdos Jintong Mining Co., Ltd., Erdos 010499, China |
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Abstract In view of the production situation that the coal seam was stratified when the 51111 return air roadway was driven to 310m in Jintong Mine, and the coal seam became two layers of 5-1 coal and 5-1 coal after stratification, and the coal seam hardness was higher than the roof rock, the hierarchical support principle and key technology were proposed, and the anchor rod, short anchor cable and long anchor cable were respectively anchored to the stable 5-1 upper coal. Combined with FLAC3D numerical simulation software to simulate the prestressed field of the graded support, the support scheme was given. After the completion of roadway support, the deformation of roadway surrounding rock was monitored. The monitoring results showed that the deformation of surrounding rock showed a trend of ' rapidly increasing first and then gradually stabilizing '. The convergence of roof and floor was less than 20 mm, and the convergence of two sides was less than 16 mm. The support scheme could effectively control the roof.
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| [ 1 ] 王建辉，王树明，彭 伟. 深井强采动软岩巷道围岩变形影响因素及监测分析[ J ]. 陕西煤炭，2021，40（ S1 ）：59 - 63.
[ 2 ] 左建平，刘海雁，徐丞谊，等. 深部煤矿巷道等强支护力学理论与技术[ J ]. 中国矿业大学学报，2023，52（ 4 ）：625 - 647.
[ 3 ] 陈 程. 矿井软岩巷道锚杆支护技术的研究[ J ]. 机械管理开发，2023，38（ 4 ）：258 - 260.
[ 4 ] 李 季，冯吉成，张胜凯，等. 软岩巷道长短锚杆协调支护技术研究[ J ]. 煤炭科学技术，2015，43（ 3 ）：17 - 21，25.
[ 5 ] 刘保民，李怀珍，张 和. 软岩巷道中网壳锚喷结构受力监测分析[ J ]. 煤田地质与勘探，2007（ 5 ）：58 - 61.
[ 6 ] 李学华，杨宏敏，刘汉喜，等. 动压软岩巷道锚注加固机理与应用研究[ J ]. 采矿与安全工程学报，2006（ 2 ）：159 -
163.
[ 7 ] 权春阳. 含软弱夹层极近距离特厚煤层巷道位置与支护方案研究[ J ]. 同煤科技，2022（ 3 ）：21 - 25，28. |
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