大采高超长工作面底板破坏深度数值模拟分析
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摘要
工作面采后底板破坏深度是煤矿带压开采问题中重要的研究课题。为了研究大采高超长工作面采后底板破坏深度,选取寺河矿3#煤回采工作面为研究对象,采用FLAC3D数值模拟软件,将影响工作面采后底板破坏深度的采宽、采高和采深3个因素做为主控因素,分析其对采后底板破坏深度的影响,结合多元非线性回归分析理论,建立采高、采深和采宽底板破坏深度预测模型。结果表明,3个主控因素对底板破坏深度的影响表现为非线性的;影响程度大小依次为采宽>采深>采高。
The floor failure depth after mining is an important research topic in the mining under safe water pressure of aquifer. In order to study the floor failure depth of large mining height and super-long working face, this paper selects No.3 coal mining face in Sihe Mine as the research object, and the main factors affecting the floor failure depth are three factors: width, height and depth. FLAC~(3D) numerical simulation software is used to analyze the influence of three main factors on the floor failure depth.Based on the theory of multivariate nonlinear regression analysis, the prediction model of floor failure depth for mining height,depth and width is established. The results show that the influence of the three main factors on the floor failure depth is nonlinear,the order of influence is width>depth>height.
The floor failure depth after mining is an important research topic in the mining under safe water pressure of aquifer. In order to study the floor failure depth of large mining height and super-long working face, this paper selects No.3 coal mining face in Sihe Mine as the research object, and the main factors affecting the floor failure depth are three factors: width, height and depth. FLAC~(3D) numerical simulation software is used to analyze the influence of three main factors on the floor failure depth.Based on the theory of multivariate nonlinear regression analysis, the prediction model of floor failure depth for mining height,depth and width is established. The results show that the influence of the three main factors on the floor failure depth is nonlinear,the order of influence is width>depth>height.
引文
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[2]武强,贾秀,曹丁涛,等.华北型煤田中奥陶统碳酸盐岩古风化壳天然隔水性能评价方法与应用[J].煤炭学报,2014,39(8):1735-1741.
[3]代革联,杨韬,郭国强,等.带压开采首采工作面底板破坏深度研究[J].煤炭科学技术,2016,44(8):56.
[4]刘新民.沿空留巷采煤对底板扰动破坏深度影响[J].煤田地质与勘探,2016,44(2):79-84.
[5]段宏飞.采动过程中煤层底板破坏特征及破坏深度分析[J].煤炭科学技术,2014,42(5):17-20.
[6]张蕊,姜振泉,李秀晗,等.大采深厚煤层底板采动破坏深度[J].煤炭学报,2013,38(1):67-72.
[7]李海龙,白海波.不连沟煤矿底板采动破坏深度规律研究[J].煤炭工程,2016,48(1):99-102.
[8]马功社,孙四清,郑凯歌,等.采动效应下煤层底板变形破坏数值模拟[J].煤矿安全,2016,47(9):202.
[9]施龙青,徐东晶,邱梅,等.采场底板破坏深度计算公式的改进[J].煤炭学报,2013,38(S2):299-303.
[10]宋文成,梁正召,赵春波.承压水上开采沿工作面倾向底板力学破坏特征[J].岩石力学与工程学报,2018,37(9):2131-2143.
[11]马国龙,张庆华,赵彬.寺河煤矿煤与瓦斯突出主控因素分析及防治对策[J].煤炭科学技术,2014,42(3):49-52.
[12]边凯,杨志斌.煤层底板承压水导升带影响因素正交模拟试验[J].煤田地质与勘探,2016,44(1):74-78.
[13]刘伟韬,穆殿瑞,杨利,等.倾斜煤层底板破坏深度计算方法及主控因素敏感性分析[J].煤炭学报,2017,42(4):849-859.
[14]段鸿飞.底板破坏深度六因素线性预测模型[J].岩土力学,2014,35(11):3323-3330.
[15]李江华,许延春,谢小锋,等.采高对煤层底板破坏深度的影响[J].煤炭学报,2015,40(S2):303-310.