煤矿巷道层状围岩松动圈范围的发育规律
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摘要
以贵州织金煤矿层状巷道围岩为研究对象,以声波速度突变判断围岩松动圈范围为手段,对直墙拱形断面和圆拱形断面分别进行多样本测试,判定巷道松动范围界限,统计分析每种类型巷道松动圈范围,揭示其发育规律。成果表明:夹角α由小变大的过程,顺倾侧壁以及拱顶的松动范围逐渐减小,而反倾侧壁松动圈范围逐渐增大,直至两侧壁松动范围近似一致。获取巷道不同部位的松动范围,并绘制松动圈在不同夹角α发育规律图,提出了针对层状巷道围岩松动圈的开挖设计以及支护的技术要点。
Taking the layered roadway surrounding rock of Zhijin Coal Mine in Guizhou Province as the research object and using acoustic velocity mutation to judge the range of the surrounding rock loosing circle, the straight wall arch section and circular arch section are tested by multiple samples, the limit of roadway loosing range is determined, and the range of loosing circle of each type of roadway is analyzed statistically, and the development law is revealed. The results show that the loosing range of the inclined side wall and the vault roof decreases gradually, while the loosing range of the anti-inclined side wall increases gradually until the loosing range of the two sides is approximately the same. The loosing range of different parts of the roadway is obtained,and the development law diagram of the loosing circle at different angles is drawn. The excavation design and the technical key points of support for the loosing circle of surrounding rock in layered roadway are proposed.
Taking the layered roadway surrounding rock of Zhijin Coal Mine in Guizhou Province as the research object and using acoustic velocity mutation to judge the range of the surrounding rock loosing circle, the straight wall arch section and circular arch section are tested by multiple samples, the limit of roadway loosing range is determined, and the range of loosing circle of each type of roadway is analyzed statistically, and the development law is revealed. The results show that the loosing range of the inclined side wall and the vault roof decreases gradually, while the loosing range of the anti-inclined side wall increases gradually until the loosing range of the two sides is approximately the same. The loosing range of different parts of the roadway is obtained,and the development law diagram of the loosing circle at different angles is drawn. The excavation design and the technical key points of support for the loosing circle of surrounding rock in layered roadway are proposed.
引文
[1]董方庭.巷道围岩松动圈支护理论及应用技术[M].北京:煤炭工业出版社,2001.
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[4]赵国彦,梁伟章,王少锋,等.基于量纲分析的巷道围岩松动圈预测模型[J].岩土力学,2016(S2):273.
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[6]曹平,陈冲,张科,等.金川矿山深部巷道围岩松动圈厚度测试与分析[J].中南大学学报(自然科学版),2014(8):2839-2844.
[7]陈亚楠,潘城.多次爆破振动下巷道围岩松动圈变化规律研究[J].煤矿安全,2016,47(3):44-47.
[8]余敏,林从谋,殷榕鹏.基于改进双剪统一强度理论的围岩松动圈分析[J].地下空间与工程学报,2018(2):379-386.
[9]吴涛,戴俊,杜美利,等.基于声波法测试技术的巷道围岩松动圈测定[J].煤矿安全,2015,46(1):169.
[10]于远祥,谷拴成.矩形巷道围岩松动范围实测及控制技术研究[J].采矿与安全工程学报,2013,30(6):828-835.
[11]张晓宇,李者,朱世安.深井软岩巷道围岩松动圈测试及支护技术[J].煤矿安全,2016,47(5):94-96.
[12]陈秋南,黄小城,谢小鱼.基于Hoek-Brown准则对围岩松动圈半径的推导及改进[J].应用力学学报,2015(2):304-310.
[13]骆建军,陈保忠,宋扬,等.碳化泥质板岩大断面隧道围岩松动圈测试研究[J].地下空间与工程学报,2017,13(4):1047-1055.
[14]赵彦钵,吴瑞祥,李政林,等.极限拉应变准则在围岩松动圈模拟中的应用[J].地下空间与工程学报,2014,10(2):315-321.
[15]肖旭峰,陈维,许润.倾斜层状巷道围岩松动圈分布及支护技术研究[J].采矿技术,2015(1):31-32.
[2]黄锋,朱合华,李秋实,等.隧道围岩松动圈的现场测试与理论分析[J].岩土力学,2016(S1):145-150.
[3]郭亮,李俊才,张志铖,等.地质雷达探测偏压隧道围岩松动圈的研究与应用[J].岩石力学与工程学报,2011(S1):3009-3015.
[4]赵国彦,梁伟章,王少锋,等.基于量纲分析的巷道围岩松动圈预测模型[J].岩土力学,2016(S2):273.
[5]孟波,靖洪文,朱谭谭.西部侏罗系软岩巷道松动圈演化机理模型试验[J].中国矿业大学学报,2014,43(6):1003-1010.
[6]曹平,陈冲,张科,等.金川矿山深部巷道围岩松动圈厚度测试与分析[J].中南大学学报(自然科学版),2014(8):2839-2844.
[7]陈亚楠,潘城.多次爆破振动下巷道围岩松动圈变化规律研究[J].煤矿安全,2016,47(3):44-47.
[8]余敏,林从谋,殷榕鹏.基于改进双剪统一强度理论的围岩松动圈分析[J].地下空间与工程学报,2018(2):379-386.
[9]吴涛,戴俊,杜美利,等.基于声波法测试技术的巷道围岩松动圈测定[J].煤矿安全,2015,46(1):169.
[10]于远祥,谷拴成.矩形巷道围岩松动范围实测及控制技术研究[J].采矿与安全工程学报,2013,30(6):828-835.
[11]张晓宇,李者,朱世安.深井软岩巷道围岩松动圈测试及支护技术[J].煤矿安全,2016,47(5):94-96.
[12]陈秋南,黄小城,谢小鱼.基于Hoek-Brown准则对围岩松动圈半径的推导及改进[J].应用力学学报,2015(2):304-310.
[13]骆建军,陈保忠,宋扬,等.碳化泥质板岩大断面隧道围岩松动圈测试研究[J].地下空间与工程学报,2017,13(4):1047-1055.
[14]赵彦钵,吴瑞祥,李政林,等.极限拉应变准则在围岩松动圈模拟中的应用[J].地下空间与工程学报,2014,10(2):315-321.
[15]肖旭峰,陈维,许润.倾斜层状巷道围岩松动圈分布及支护技术研究[J].采矿技术,2015(1):31-32.