IMPACT OF PROPOSED MEASURES REGARDING MONITORING, WARNING, AND ELIMINATION OF EMERGENCY STATES OF MECHANIZED FASTENING ON THE ECONOMIC SUSTAINABILITY OF COAL MINING ENTERPRISES

Purpose. To substantiate the economic efficiency of clean coal extraction in the event of an emergency state of mechanized fastening caused by mining complications in the mine shafts of the Western Donbass, in particular in the geomechanical zones of assembly chambers of deep horizons, according to two options: an emergency state of mechanized fastening in the beds under the condition of hydraulic overload of the main roof, as well as trouble-free operation taking into account the proposed solutions. Method. The study used statistical data on emergency landings of mechanized fastening at enterprises in the region, their classification and analysis of cause-and-effect relationships were carried out. A comparative calculation of the costs and losses of the enterprise under the conditions of the occurrence of the accident and under the scenario of its prevention was performed. The cost of coal was calculated taking into account the influence of hydrostatic pressure and the application of preventive measures – in particular, pressure relief by wells and local disintegration of the rock massif. Results. The economic effect is substantiated for two scenarios. In the first scenario, the company’s profit losses as a result of the suspension of coal production were calculated, as well as the economic costs of eliminatingliquidating the accident. In the second scenario, the costs of implementing the forecast and implementing measures to prevent the accident were calculated. The difference in costs between the first and second scenarios is the economic effect of the decisions made. The calculations demonstrate the economic feasibility of implementing the technology of removing hydrostatic pressure by wells and local disintegration of the rock massif. Scientific novelty. For the first time, a methodology for calculating the economic effect of a set of measures to prevent emergency landings of fastenings «on a hard base» has been substantiated. A risk management structure has been proposed, which is based on a systematic forecast of geomechanical instability of the roof, operational monitoring of the hydraulic state of the array, and local stress reduction technology. Practical significance. The results of the study can be used to optimize technological planning and develop strategies for intensification of coal mining in the mines of Western Donbas. The calculation parameters substantiated in the work allow us to objectively assess the economic feasibility of operating mines in difficult geological conditions, as well as to determine the priority of investments in technical solutions aimed at stabilizing the mining environment. The proposed approaches can be integrated into the general system for ensuring the economic sustainability of coal mining enterprises in conditions of limited resource supply and deep development horizons.