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| Optimization design of roadway support under goaf of close distance coal seam |
| Zhou Yang, Ma Xiaolong |
| Ningxia Coal Industry Co., Ltd. of CHN Energy, Yinchuan 750000, China |
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Abstract Aiming at the serious problem of deformation and failure of No.12201 transportation roadway, combined with the actual occurrence environment of No.11 and No.12 close distance coal seams in Shuangma No.1 Mine, FLAC3D software was used to analyze the stress evolution law of surrounding rock in roadway excavation and face mining. The simulation results showed that during the roadway excavation, the two sides had asymmetric stress increase area. After the mining of No.12201 Face was stable, the goaf side of the transportation roadway was converted into a stress reduction area, and the lateral abutment pressure of the solid coal side was significantly increased under the action of multiple disturbances. According to the simulation results, the roadway support was optimized. Full anchor cable support was adopted in roadway side and increased the support density. The field measurement showed that the deformation of the surrounding rock of the two sides was stable at 300 mm for one hundred days, and the deformation of the roof was stable at 200 mm. The optimized support scheme obviously reduced the deformation of the surrounding rock of the roadway, the anchorage ring of the roadway was stable, and the deformation of the surrounding rock was effectively controlled.
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| [ 1 ] 鞠金峰，许家林. 浅埋近距离煤层出煤柱开采压架防治对策[ J ]. 采矿与安全工程学报，2013，30（ 3 ）：323 - 330.
[ 2 ] 程健新. 近距离煤层块体结构顶板破断规律研究[ J ]. 煤矿现代化，2023，32（ 1 ）：38 - 43.
[ 3 ] 刘福平，李泳臻. 近距离煤层采动影响下巷道支护设计研究[ J ]. 采矿技术，2023，23（ 1 ）：12 - 16.
[ 4 ] 郑光辉，刘宇飞，吉格买提·吉布森.东沟煤矿浅埋煤层群采空区下巷道最佳布置[ J ]. 煤矿安全，2022，53（ 12 ）：192 - 200.
[ 5 ] 冯 刚，田王健.近距离煤层回采巷道支护设计[ J ]. 机械管理开发，2022，37（ 11 ）：110 - 114.
[ 6 ] 谭永新. 采空区下顶板失稳因素与控制技术[ J ]. 煤炭技术，2022，41（ 12 ）：59 - 62.
[ 7 ] 朱利军. 近距离煤层采空区下孤岛工作面运输巷支护优化设计[ J ]. 煤炭与化工，2022，45（ 11 ）：24 - 27.
[ 8 ] 任玉龙，侯兰涛，商 伐. 近距离煤层采空区下回采巷道布局研究[ J ]. 陕西煤炭，2023，42（ 1 ）：35 - 40.
[ 9 ] 兰 红，郑禄林，荣 鹏，等. 近距离煤层开采底板应力演化规律及围岩稳定性研究[ J ]. 煤炭技术，2023，42（ 1 ）：6 - 10.
[ 10 ] 王泓博，张 勇，庞义辉. 近距离煤层下行跨煤柱开采巷道的合理布局[ J ]. 东北大学学报（自然科学版），2023，44（ 1 ）：100 - 109. |
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