| 复杂应力下巷道底鼓控制关键技术研究 |
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| 引用本文： | 王 祥1,谭维佳2. 复杂应力下巷道底鼓控制关键技术研究[J]. 中州煤炭, 2021, 0(11): 299-304，310. DOI: 10.19389/j.cnki.1003-0506.2021.11.050 |
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| 作者姓名： | 王 祥1 谭维佳2 |
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| 作者单位： | （1.川藏铁路有限公司，四川 成都 610094； 2.长安大学 地质工程与测绘学院，陕西 西安 710054） |
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| 摘 要： | 针对回坡底煤矿1021软岩巷道底板变形失稳问题，旨在研究其底鼓变形机理，并提出合理的底鼓控制方案。采用了理论分析、现场监测、数值模拟、井下应用等研究手段，详细研究了巷道底板围岩非对称受力分布状态、底鼓非对称变形分布状态及底鼓控制技术。研究结果表明:1021巷道处于上部采空区遗留煤柱底板破坏范围内，距离煤柱远的一侧位移速度更快；底板围岩受力非对称性，导致非对称性变形，巷道底板近煤柱侧水平变形量为近胶带侧1.2倍，近胶带侧底板垂直变形量为近煤柱侧的1.5倍；靠近煤柱侧采用卸压法改善应力环境，近胶带侧采用加固法控制围岩变形，因此提出了卸压孔和加固孔相结合的底鼓控制方案，并确定了相关孔位的具体技术参数。将该方案应用于井下巷道现场，防治段底板变形量与未防治段相比大幅减小，20 d后变形趋于稳定，底鼓控制效果显著。
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| 关 键 词： | 复杂应力 巷道 底鼓 非对称变形 底板破坏 应力分布 |
Research on key technology of floor heave control in roadway under complex stress |
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| Wang Xiang1,Tan Weijia2. Research on key technology of floor heave control in roadway under complex stress[J]. Zhongzhou Coal, 2021, 0(11): 299-304，310. DOI: 10.19389/j.cnki.1003-0506.2021.11.050 |
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| Authors: | Wang Xiang1 Tan Weijia2 |
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| Affiliation: | （1.Sichuan-Tibet Railway Co.，Ltd.，Chengdu 610094，China；2.College of Geological Engineering and Survey，Chang′an University，Xi′an 710054，China） |
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| Abstract: | Aiming at the problem of floor deformation and instability of 1021 soft rock roadway in Huipodi Coal Mine，this paper aims to study its floor heave deformation mechanism and put forward a reasonable floor heave control scheme.By means of theoretical analysis，field monitoring，numerical simulation and underground application，the asymmetric stress distribution state of roadway floor surrounding rock，asymmetric deformation distribution state of floor heave and floor heave control technology are studied in detail.The research results show that:1021 roadway is in the upper gob left coal pillar floor damage range，the displacement speed of the side far from the coal pillar is faster；the stress asymmetry of floor surrounding rock leads to asymmetric deformation，the horizontal deformation of roadway floor near the coal pillar side is 1.2 times of that near the belt side，and the vertical deformation of roadway floor near the belt side is 1.5 times of that near the coal pillar side；the pressure relief method is adopted for the side near the coal pillar In order to improve the stress environment，the reinforcement method is used to control the surrounding rock deformation near the belt side.Therefore，the floor heave control scheme combining the pressure relief hole and reinforcement hole is proposed，and the specific technical parameters of the relevant hole position are determined.By using this scheme，the floor deformation of the prevention section is greatly reduced compared with that of the non prevention section，and the deformation tends to be stable after 20 days.The effect of surgical control of tympanic floor is remarkable. |
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| Keywords: | complex stress roadway floor heave asymmetric deformation floor failure stress distribution |
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