<p>Microseismic (MS) monitoring can be valuable for mine safety, offering improved understanding of mine geomechanics. By introducing the MTfit and MSATSI inversion methods to study the focal mechanisms of microseismic events and the stress field in coal mines, we applied these techniques to the 63_upper06 working face in the Dongtan Coal Mine. We selected 282 high-quality microseismic events during the mining process and used MTfit to invert their focal mechanisms. We then used MSATSI to determine the direction of the maximum horizontal principal compressive stress in the region. This allowed us to establish a connection between mining activities, focal mechanisms, and rock strata fractures. Results show the predominance of normal and reverse faulting with significant CLVD components, underlining tensile and compressive failures as dominant in the mine’s seismicity. Further, the study divides the research area into three regions for detailed stress analysis: region ① is located below the working face with a maximum principal stress of 20.3&#xa0;MPa, oriented at N60° E; region ② is above the working face and exhibits more complex stress conditions with a maximum principal stress of 30.1&#xa0;MPa; and region ③ is situated at the roof’s right side of the working face, with a maximum principal stress of 20.3&#xa0;MPa, oriented at 15° northwest. These results provide an important reference for seismic risk assessment and disaster prevention and control during mining.</p>