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首页> 外文期刊>Arabian journal of geosciences >Sensitivity analysis of influencing factors and control technology for coalface failure
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Sensitivity analysis of influencing factors and control technology for coalface failure

机译：影响因素的敏感性分析及煤炭衰竭控制技术

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In view of the fact that rib spalling of coalfaces seriously affects normal production in a large-cutting-height panel, the mechanical model of the "coalface-support-roof" is established to analyze the main factors affecting coalface stability, and a real panel, no. 8101, is used as an example. Using the main influence factors with different levels, orthogonal experimental design is used to determine the numerical simulation scenarios. The coalface failure conditions for different simulated scenarios are studied using DEM method. The orthogonal experiment method was used to analyze the simulation results in this study. The coalface is strengthened using the "manila+ grouting" reinforcement technique. The results show that the factors affecting coalface stability are the cutting height, support capacity, coal cohesion, coal friction, and upward-inclined angle. The larger the cutting height is, the larger the roof pressure is on the coalface. The larger the support capacity is, the smaller the roof pressure is on the coalface. The larger the coal cohesion and friction values are, the larger the roof pressure is that the coalface can bear. The sensitivities of cutting height, support capacity, coal cohesion, coal friction, and an upward-inclined angle with respect to coalface stability are 14.60, 2.29, 38.63, 1.19, and 1.95, respectively. In descending order of influence, the factors are coal cohesion > cutting height > support capacity > upward-inclined angle > coal friction. The "manila+ grouting" reinforcement technology effectively controls coalface failure, yields a 30 similar to 40% saving in costs, and reduces incidents of coalface failure by 70 similar to 80%. The research results provide new insights for the evaluation and control of coalface stability.
机译：鉴于煤焊物的肋骨剥落严重影响了大型矫正高度面板中的正常生产，建立了“煤炭 - 支撑屋顶”的机械模型，分析了影响煤炭稳定性的主要因素，以及真实面板， 不。 8101，用作示例。使用具有不同层面的主要影响因素，正交实验设计用于确定数值模拟方案。使用DEM方法研究了不同模拟场景的Coolface故障条件。正交实验方法用于分析该研究的模拟结果。采用“马尼拉+灌浆”加固技术加强了煤炭。结果表明，影响煤炭稳定性的因素是切削高度，支撑能力，煤炭粘合，煤摩擦和向上倾斜角度。切削高度越大，屋顶压在煤炭上越大。支撑能力越大，屋顶压在煤炭上越小。煤内聚力和摩擦值越大，屋顶压力越大，煤炭可以承受。切割高度，支撑能力，煤炭内聚力，煤摩擦和相对于煤炭稳定性的向上倾斜角度分别为14.60,2.29,38.63,1.19和1.95。在降下的影响阶数，因素是煤炭凝聚>切割高度>支撑能力>向上倾斜角度>煤摩擦。 “马尼拉+灌浆”加强技术有效控制煤炭衰竭，产生30％，类似于40％的成本，并减少了煤炭故障的事件70×70〜80％。研究结果为煤炭稳定性的评估和控制提供了新的见解。

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