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| Application of roof cutting pressure relief and composite support system in gob-side entry retaining |
| Liu Chunji |
| Linfen Hongda Mining Co., Ltd.,Jinneng Holding Coal Industry Group, Linfen 041000, China |
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Abstract In order to solve the serious problems of mine pressure and roadway deformation caused by the combination of thick hard roof and plastic floor in No.W3305 fully mechanized working face, the geological conditions of the working face were analyzed, and the bidirectional directional blasting method was adopted to cut off the cantilever beam structure of the open side roof of the working face and reduce the revolving stress of the key layer of the roof. The roof and floor of the roadway along the empty side were supported steadily by casting the flexible mold wall and strengthening the bottom plate by grouting. Through the new integrated support of anchor cable, the failure of anchor cable and broken roof cable were solved. The results showed that the strategy of bidirectional shaped blasting, roof cutting and pressure relief, flexible mold wall support, new anchor cable support and floor soft rock reinforcement can effectively solve the problem of roadway deformation and instability, and save about 5 million yuan.
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| [ 1 ] 李春元，张 勇，左建平，等. 深部开采砌体梁失稳扰动底板破坏力学行为及分区特征[ J ]. 煤炭学报，2019，44（ 5 ）：1 508 - 1 520.
[ 2 ] 杨路林，刘 倩，吴士良，等. 大采高综放面直接顶悬臂梁结构形成机理研究[ J ]. 中国矿业，2021，30（ S1 ）：305 - 310.
[ 3 ] 徐军见. 大断面二次动压巷道变形特征与支护对策[ J ]. 煤矿安全，2018，49（ 10 ）：159 - 162.
[ 4 ] 何满潮，武毅艺，高玉兵，等. 深部采矿岩石力学进展[ J ]. 煤炭学报，2024，49（ 1 ）：75 - 99.
[ 5 ] 何满潮. 无煤柱自成巷开采理论与110工法[ J ]. 采矿与安全工程学报，2023，40（ 5 ）：869 - 881.
[ 6 ] 邓晓刚，栾恒杰，刘建荣. 切顶卸压沿空留巷围岩控制效果数值模拟研究[ J ]. 煤矿安全，2021，52（ 9 ）：239 - 244.
[ 7 ] 郭海军，杜怀龙. 厚煤层沿空留巷柔模混凝土充填体合理宽度确定[ J ]. 煤炭科学技术，2022，50（ S2 ）：105 - 112.
[ 8 ] 钱志良，杨宏伟，高 宏. 变厚煤层沿空留巷支护技术[ J ]. 煤矿安全，2019，50（ 7 ）：124 - 129. |
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