基于精细地质模型的起伏煤层少矸化回采参数优化研究

Mining Parameters Optimization on Undulating Coal Seams with Less Gangue Based on Refined Geological Model

研究工作面煤和矸石采出量的变化规律,对矿井智能精准开采合理规划工作面回采方案具有参考价值。使用起伏煤层精细化地质建模方法,构建起伏煤层精细化地质模型,通过使用网格法/三角法,求解起伏煤层少矸化回采模型;并以起伏煤层少矸化回采参数中的采高作为变量,研究模型中增加煤体体积量与采出矸石体积量关系。结果表明:三角法更适用于求解模型;求解数学模型过程中,随着采高不断变化,数学模型函数值将到达拐点。根据实例模型求解结果,采高为5.2 m,增加煤体体积量与采出矸石体积量比值大于24.52时,少矸化回采参数轨迹达到最优;相较于现场采高,产矸量可减少3.5万t以上。

The study on the variation law of coal and gangue extraction in the working face has a reference value for the intelligent and accurate mining of the mine and the rational planning of the mining scheme of the working face. The fine geological modeling method was used to construct the fine geological model of undulating coal seam, and the recovery model of undulating coal seam with less gangue was solved by grid method or triangle method. Taking the mining height in the mining parameters of undulating coal seams with less gangue as a variable, the relationship between the coal volume and the gangue volume in the model was studied. The results show that the triangle method is more suitable for solving the model. In the process of solving the mathematical model, with the continuous change of mining height, the function value of the mathematical model will reach the inflection point. According to the solution results of the example model, when the mining height is 5.2 m and the ratio of coal volume to gangue volume is greater than 24.52, the track of mining parameter with less gangue is optimized. Compared with the on-site mining height, the gangue production can be reduced by more than 35 000 tons.