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The influence of mining factors on seismic activity during longwall mining of a coal seam
International Journal of Mining Science and Technology ( IF 11.8 ) Pub Date : 2021-02-19 , DOI: 10.1016/j.ijmst.2021.01.010
Łukasz Wojtecki , Joanna Kurzeja , Małgorzata Knopik

In this article an attempt to determine the influence of mining factors on the seismic activity during the longwall mining of the upper layer of coal seam no. 405/2 in one of the Polish hard coal mines in the Upper Silesian Coal Basin was conducted. Two longwall panels were mined in analogous geological conditions and based on the same mining system and technology. However, there was significant difference with regards to the mining factors, which was reflected in the observed seismic activity. Some tools used in mining seismology were applied to illustrate the aforementioned influence of mining factors, e.g. the frequency-energy distribution, the frequency-magnitude distribution, the 2D distribution of released seismic energy, the relationship between released seismic energy and the volume of mined coal, the Benioff strain release, and the Gutenberg-Richter (GR) b coefficient distribution (b is the proportion between high and low energy tremors). Concerning the Benioff strain release, a new solution, based on the slope of a fitted line in a moving time window, is proposed.



中文翻译:

煤层长壁开采过程中开采因素对地震活动的影响

在本文中,试图确定开采因素对1号煤层上层长壁开采过程中地震活动的影响。在上西里西亚煤盆地的一个波兰硬煤矿中进行了405/2。在相同的地质条件下,基于相同的采矿系统和技术,开采了两块长壁板。但是,在采矿因素方面存在显着差异,这在观察到的地震活动中得到了反映。利用采矿地震学中的一些工具来说明开采因素的上述影响,例如频率-能量分布,频率-幅度分布,释放的地震能量的二维分布,释放的地震能量与采煤量之间的关系。 ,贝尼奥夫菌株释放,b系数分布(b是高能量震颤与低能量震颤之间的比例)。关于贝尼奥夫应变的释放,提出了一种新的解决方案,其基于移动时间窗口中拟合线的斜率。

更新日期:2021-02-19
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