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Relationship between radiated seismic energy and explosive pressure for controlled methane and coal dust explosions in an underground mine

机译：地下矿井瓦斯，煤尘爆炸的辐射地震能与爆炸压力的关系

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Examination of seismic records during the time interval of the Sago Mine disaster in 2006 revealed a small amplitude signal possibly associated with an event in the mine. Although the epicenter of the sig nature was located in the vicinity where the explosion occurred, it could not be unequivocally attributed to the explosion. A greater understanding about the seismicity from mine explosions is required in order to properly interpret critical seismic information. A seismic monitoring system located at NIOSH's Lake Lynn Experimental Mine has monitored 16 experimental methane and coal dust-based explosions. This paper describes the research conducted to quantify a relationship between measured values of radiated seismic energy and peak explosive pressure generated. The radiated seismic energy takes into account seismic signature characteristics such as the frequency content, amplitude, and duration. On the other hand, the size of the explosion is a function of the experimental design, dependent on factors such as the presence of an explosion-containment structure, the mine geometry, and the amount of initial explo sive fuel used during the explosion. The seismic signatures from methane and coal dust explosions were analyzed using standard waveform analysis procedures. The procedures used to estimate the radiated seismic energy were conducted using self-produced programs, which are explained in this paper. The radiated seismic energy estimates were considered to be relative values for each experiment. A relation ship was derived to correlate the relative radiated seismic energy to the size of the explosion, defined as the peak pressure generated. It was also observed during this study that an explosion-containment struc ture can act as a major seismic source. Recommendations are made, based upon the findings of this study, for improved collection of seismic data in the future.
机译：对2006年Sago矿山灾难期间的地震记录进行的检查显示，一个小振幅信号可能与矿山中的事件有关。尽管信号性质的震中位于爆炸发生的附近，但不能将其明确地归因于爆炸。为了正确地解释关键的地震信息，需要对矿山爆炸的地震活动性有更多的了解。位于NIOSH的Lynn湖实验矿的地震监测系统已经监测了16处基于甲烷和煤尘的实验爆炸。本文介绍了为量化辐射地震能量的测量值与爆炸峰值压力之间的关系而进行的研究。辐射的地震能量考虑了地震特征，例如频率含量，振幅和持续时间。另一方面，爆炸的大小是实验设计的函数，取决于诸如爆炸围护结构的存在，矿井的几何形状以及爆炸期间使用的初始爆炸燃料的数量等因素。使用标准波形分析程序分析了甲烷和煤尘爆炸的地震特征。用于估计辐射地震能量的程序是使用自产程序进行的，本文对此进行了说明。辐射地震能的估计值被认为是每个实验的相对值。派生了关系船，将相对辐射的地震能量与爆炸的大小相关联，爆炸的大小定义为产生的峰值压力。在这项研究中还观察到，防爆结构可以作为主要的地震源。根据这项研究的结果，提出了一些建议，以便将来改进地震数据的收集。

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