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    calculation (1)
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    Coal is the main fossil fuels used in power generation. International and local experience shows that traditional coal mining in areas of geological fracturing is unviable because of the high cost of coal produced, low labor safety of miners and gas-dynamic phenomena that occur near the affected zones. The existing technologies of in-situ coal gasification process in the area of small-amplitude geological faults not sufficiently reflect the latest achievements of science and technology. Based on the problems associated with cross the disjunctive geological faults, it is clear that the study of new methods for the coal seams extraction in difficult geological conditions is now an urgent task not only for Ukraine but other countries around the world. Breakthrough over the last decades in the field of underground coal gasification were obtained thanks to the strong interest in the development of alternative technologies of coal mining, due to the ever increasing demand and fuel price. The dissertation solved the problem with the current study of borehole underground coal gasification technology in the faulting zone of massif. Based on analytical, computer and laboratory experimental studies, dependences of changes in preparation and operation of underground gasifier are established depending of the geological faulting of massif. Established that the bypass zone of increased vertical strain has logarithmic dependence on changes in the displacement amplitude lengthways of faulting. Technological parameters of crossing geological faults with underground gasifier are substantiated based on determination the bypass zone of increased vertical strain depending on the borehole inclination angle and displacement amplitude of the faulting. The investigations on the laboratory model explain the need for a thorough examination of possible transition disjunctive geological dislocation without full coal seam fracturing at different values of displacement amplitude and also to receipt the initial data for development the methods for coal seam gasification in natural conditions. Reduce the percentage concentration of combustible generator gases appear ahead of disjunctive fault, plane of geological fault, because break down altogether chemical zone in coal seam perpendicular to the reaction channel. Time at which underground gasifier reach the regime of stabilization, that are determined by the total output of generator gases and the heating value of generator gases crossing disjunctive geologic fault with the amplitude up to 0.9 of coal seam thickness at an exponential dependence depends on the displacement amplitude and the speed of combustion face advance. The enhancement of total process of carbon gasification theoretically depend both the rate of chemical reactions and the enhancement of injected air supply and extraction of gasification product. The role of these heterogenous factors depends on specific conditions of gasification process. The enhancements of the geological fault crossing zones depend on balanced supply of injected reagents, respectively, take into account heterogenic geometry of coal seam. That is why it was necessary to conduct additional calculation of material and heat balance and make manual mode of gasification process. After enhancement of coal seam gasification we have an opportunity for a shorter time reach the regime of stabilization. However these actions require additional technical implementations in the gasifier operation. Based on conducted researches the recommendations for coal seams gasification in the faulting zone with borehole underground coal gasification was developed for the mine “Velykomostivska” SE “Lvivvugillia”. Economic evaluation that was made based on the calculation of economic efficiency justifies the use of borehole underground coal gasification technology during coal seams gasification in the faulting zones. (1)
    convergence (1)
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    excavation mine working (1)
    faulting (1)
    geomechanical factors (1)
    in-situ gasifier (1)