<p>Accurate mining stress monitoring is key for mine layout optimization, roadway support structure design and impact ground pressure prevention and control. However, the plastic and fracture zones generated during the drilling and installation of borehole stress gauges lead to inaccurate or even ineffective results of traditional mining stress monitoring. To address this problem, this study aimed to systematically reveal the failure mechanism of traditional borehole stress gauges for monitoring mining stress in coal seams and to propose a new stress monitoring method based on grout curing pretreatment, including reshaping the integrity of the surrounding rock of the borehole through grout curing and constructing a stable medium for stress transfer. And the new method of monitoring mining stress in coal seam by borehole stress gauge is studied by laboratory test, numerical simulation, and field application. Both laboratory test and numerical simulation verify the feasibility of the new method of mining stress test in improving the monitoring accuracy of borehole stress gauge, and the larger the range of plastic and fracture zone, the more significant the improvement effect of monitoring accuracy. The new method was applied in the field. The monitoring results show that the traditional monitoring method of borehole stress gauge easily failed, and the value was low, while the monitoring accuracy of borehole stress gauge is significantly improved after grouting solidification. The field monitoring results are basically consistent with the laboratory test and numerical simulation results. This method can significantly enhance the measurement accuracy of borehole stress gauges. The results can promote the optimization of mine development layouts, the design of roadway support structures and the prevention and control of rock bursts.</p>