山脚树煤矿强采动巷道围岩加固关键技术研究
TD322%TD353; 为解决强采动巷道围岩变形破坏、难以维护的问题,以山脚树煤矿 1200 运输平巷为研究对象,采用数值模拟、钻孔窥视和现场工业性试验等研究方法,分析了强采动巷道围岩内部裂隙发育特征、巷道围岩塑性区分布与演化特征、巷道表面位移的变化情况,并结合现场实际条件提出了"二次强力锚注"支护方案.研究结果表明,受工作面多次采动影响,巷道围岩裂隙扩展,形成了较大的塑性区,范围在3.00 m左右;当工作面回采至巷道正上方时,采动应力将加剧巷道围岩破坏,导致顶板、左帮及右帮的变形量急剧增大.现场试验表明,采用该巷道支护优化方案后,巷道平均宽度为 5.07 m,与未优化段...
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| Published in | 矿业安全与环保 Vol. 50; no. 2; pp. 7 - 20 |
|---|---|
| Main Authors | , , |
| Format | Journal Article |
| Language | Chinese |
| Published |
贵州大学 矿业学院,贵州 贵阳 550025
01.04.2023
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1008-4495 |
| DOI | 10.19835/j.issn.1008-4495.2023.02.002 |
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| Abstract | TD322%TD353; 为解决强采动巷道围岩变形破坏、难以维护的问题,以山脚树煤矿 1200 运输平巷为研究对象,采用数值模拟、钻孔窥视和现场工业性试验等研究方法,分析了强采动巷道围岩内部裂隙发育特征、巷道围岩塑性区分布与演化特征、巷道表面位移的变化情况,并结合现场实际条件提出了"二次强力锚注"支护方案.研究结果表明,受工作面多次采动影响,巷道围岩裂隙扩展,形成了较大的塑性区,范围在3.00 m左右;当工作面回采至巷道正上方时,采动应力将加剧巷道围岩破坏,导致顶板、左帮及右帮的变形量急剧增大.现场试验表明,采用该巷道支护优化方案后,巷道平均宽度为 5.07 m,与未优化段相比,收缩了2.5％;顶底板平均距离为3.40 m,与未优化段相比,收缩了3％.该支护方案能够有效控制巷道变形. |
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| AbstractList | TD322%TD353; 为解决强采动巷道围岩变形破坏、难以维护的问题,以山脚树煤矿 1200 运输平巷为研究对象,采用数值模拟、钻孔窥视和现场工业性试验等研究方法,分析了强采动巷道围岩内部裂隙发育特征、巷道围岩塑性区分布与演化特征、巷道表面位移的变化情况,并结合现场实际条件提出了"二次强力锚注"支护方案.研究结果表明,受工作面多次采动影响,巷道围岩裂隙扩展,形成了较大的塑性区,范围在3.00 m左右;当工作面回采至巷道正上方时,采动应力将加剧巷道围岩破坏,导致顶板、左帮及右帮的变形量急剧增大.现场试验表明,采用该巷道支护优化方案后,巷道平均宽度为 5.07 m,与未优化段相比,收缩了2.5％;顶底板平均距离为3.40 m,与未优化段相比,收缩了3％.该支护方案能够有效控制巷道变形. |
| Author | 梁旭超 郑行行 马振乾 |
| AuthorAffiliation | 贵州大学 矿业学院,贵州 贵阳 550025 |
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| Author_FL | ZHENG Hanghang MA Zhenqian LIANG Xuchao |
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| Author_xml | – sequence: 1 fullname: 郑行行 – sequence: 2 fullname: 马振乾 – sequence: 3 fullname: 梁旭超 |
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| Keywords | 钻孔窥视 支护方案 变形量 数值模拟 现场试验 强采动巷道 |
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| Title | 山脚树煤矿强采动巷道围岩加固关键技术研究 |
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