Seismicity related to industrial mining activities needs to be understood and quantified in order to ensure safe mining operations. It is of great important to determine if the sources of such events follow the common models and theories, and determine the source rupture property and scale of such events. Moreover, the location of the source is very important to obtain the source parameters. For this purpose, we analyze 103 events recorded in the Laohutai coal mine that are related to fault structure and mining activities to determine their source properties based on relocation. Firstly, the 103 micro-earthquakes were relocated based on double difference algorithm. Then, the source parameters of seismic moment M₀, source radius R, corner frequency f₀, seismic attenuation Q, energy E, stress drop △σ and apparent stress σ_a are computed based on relocation, Brune model and grid-search method. The relationship between the other source parameters and seismic moment, the relationship between M_L and M_w, and the influence of location on source parameters and magnitude are further analyzed. Finally, the difference of the source parameters between Laohutai coal mine, Qianqiu coal mine and natural earthquakes are analyzed. We find that the source location can be effectively corrected based on double difference algorithm; ω² model is well suited to estimate source parameters of micro-earthquakes in the Laohutai coal mine. The source spectra show strong directivity effects. Stations in the rupture direction have higher corner frequencies, while stations away from rupture direction have lower corner frequencies. With the increase of M₀, the source parameters of R, E and △σ basically show a linear increase, the source parameter f₀ basically show a linear decrease and the apparent stress fluctuate up and down around a certain value as a whole. After relocation, the location of the source has a significant effect on the quality attenuation factor Q and has no obvious effect on other source parameters. The influence of relocation on moment magnitude and local magnitude is not obvious. The moment magnitude is linear with the local magnitude. Considering M_w, M_L1 can relatively well be used to evaluate the magnitude of the earthquakes in Laohutai coal mine; For the micro-earthquakes with the same magnitude, the values of corner frequency, stress drop, apparent stress and energy in Qianqiu coal mine are greater than those in Laohutai coal mine, the value of source radius in Laohutai coal mine is greater than those in Qianqiu coal mine. For the events with the same magnitude, the corner frequency and the stress drop value of micro-earthquakes are smaller than those of natural earthquake. These indicate that the rupture properties and scales of micro-earthquakes in Laohutai coal mine are different from those of the micro-earthquakes in Qianqiu coal mine and natural earthquakes. The results help us to effectively evaluate the property and magnitude of microseismic source, and better understand causes and consequences of microseismicity in coal mine.

需要了解和量化与工业采矿活动有关的地震，以确保安全的采矿作业。确定此类事件的来源是否遵循通用模型和理论，并确定此类事件的来源破裂性质和规模，这一点非常重要。而且，源的位置对于获得源参数非常重要。为此，我们分析了记录在老虎台煤矿的103个与断层构造和采矿活动有关的事件，以便根据搬迁确定其源属性。首先，利用双差分算法对103个微震进行了定位。然后，震源参数M ₀，震源半径R，转角频率f₀，地震衰减Q，能量ê，应力降△σ和表观应力σ_一个基于搬迁，布伦模型和网格搜索方法来计算。另一源参数和地震矩之间的关系之间的关系中号_大号和中号_瓦特，和位置对源参数和大小的影响，进一步分析。最后，分析了老虎台煤矿，千秋煤矿与自然地震震源参数的差异。我们发现基于双差算法可以有效地校正源位置。ω ²该模型非常适合估算老虎台煤矿微地震的震源参数。源光谱显示出强烈的方向性效应。沿破裂方向的测站具有较高的转折频率，而远离破裂方向的测站具有较低的转折频率。随着M ₀的增加，R，E和△ σ的源参数基本上呈现线性增加，源参数f ₀基本上呈现线性下降，并且视在应力总体上围绕某个值上下波动。搬迁后，光源的位置对质量衰减因子Q有重要影响并且对其他来源参数没有明显影响。重定位对力矩大小和局部大小的影响不明显。力矩大小与局部大小成线性关系。考虑M _w，M _L1可以较好地用于评估老虎台煤矿的地震烈度；对于同等大小的微震，千秋煤矿的转角频率，应力降，表观应力和能量的值均大于老虎台煤矿的角震度，应力降，表观应力和能量值，老虎台煤矿的源半径值大于千秋煤矿。对于同等大小的事件，微震的转折频率和应力降值要小于自然地震的转折频率和应力降值。这说明老虎台煤矿微地震的破裂性质和规模与千秋煤矿和自然地震的破裂性质和规模不同。结果有助于我们有效评估微震源的性质和大小，