Маркшейдерський моніторинг стану гірничих виробок в умовах розробки зближених вугільних пластів як важливий елемент забезпечення безпеки праці та захисту шахтарів

Increasing the profitability of mining enterprises and ensuring the safety of mining works largely depend on the choice of rational and economically viable option of mining works. The search for such options, their comparison and justification have their own peculiarities in the mining of reservoir deposits. Namely, it is necessary to take into account the difference in the geometric dimensions of mine workings and the thickness of the worked seam, the influence of pillars and edge parts of adjacent seams, the presence of tectonic disturbances. These features for effective mining works require a quantitative assessment of the stressed state of the rock massif. The purpose of this work is to study the behavior of the massif in the zones of increased mining pressure, to evaluate its stress-strain state for justification of the optimal parameters of pillars, which is a very urgent scientific task in the conditions of the adjacent seams of the Western Donbass. Modeling of the stress-strain state of the rock massif was performed by the finite element method in Solid Works software. Tensions in the rock massif were determined at different pillar parameters from 25 to 40 meters with an interval of 2 meters. It was found that at the pillar size of 37 meters, the stresses along the contour of the preparatory workings will be comparable to the tension from the influence of the moving face only. At the pillar size of 25 meters, equal to the size of the actually pillar, the tension is 4 times higher than in the absence of the longwall face influence. The tension is critical for the sections of preparatory drifts that fall into the zone of increased mining pressure, which will inevitably lead to significant deformations of preparatory workings and the need to reinforce them. The work contains the results of monitoring the condition of mine workings as the longwall is approaching up to its stoppage. The analysis of conformity of modeling results with surveyor measurements of mine workings convergence and analysis of actual mine workings condition is performed.