采动影响下最大下沉角与煤层倾角关系的模拟研究

Simulation study on relationship between the max subsidence angle and seam inclination under mining influences

从大量实测数据表明最大下沉角与煤层倾角并不是简单的线性关系,为了掌握最大下沉角随煤层倾角改变的变化规律,依据芦沟煤矿32101工作面的具体地质采矿条件,通过建立数值模型分析研究了煤层倾角在0°~45°时,最大下沉角与煤层倾角之间的关系。研究结果表明:当煤层倾角小于15°时,最大下沉角与煤层倾角呈线性关系;当煤层倾角大于15°时,得出最大下沉角与煤层倾角呈二次函数关系式,并通过南票矿区的实测数据验证了结论的正确性。利用此关系式有助于提高倾斜煤层开采沉陷预计的精确度。

Great site measured data showed that there would not be a simple linear relationship between the max subsidence angle and the seam inclination. In order to master the variation law of the max subsidence angle with the seam inclination changed, according to the cer- tain geological and mining condition of No. 32101 coal mining face in Lugou Mine, the numerical model established was applied to analyze and study the relationship between the max subsidence angle and seam inclination when the seam angle was 0°- 45°. The study results showed that when the seam angle was less than 15°, the max subsidence angle and the seam angle would be in a linear relationship. When the seam angle was higher than 15° ,the obtained max subsidence angle and the seam angle would be in a quadratic function relational ex pression. And the site measured data from Nanpiao Mining Area approved the correction of the conclusion and could stimulate to improve the prediction accuracy of the mining subsidence in the inclined seam.