Purpose. The main purpose is to identify underground coal mining risks as well as approaches for their reasonable and efficient management taking into consideration internal production reserves in order to improve technological processes' efficiency and operational efficiency. Methods.In order to achieve a target goal, the paper highlights and analyzes production processes involving the highest risk level. Methods of analogous risk characteristics, systematic approach towards developing a system of coal mining risk management as well as methods of distributed control have been applied to develop risk management innovative methods.Findings. The reasons stipulating coal mining risks based upon geologic, technologic, and economic aspects of mining practice as well as imperfection of human psychology, have been defined. Attention is drawn to the necessity to involve efficient counterweights relying upon additional bonuses for detecting violations, innovative trainings, and training of personnel to prevent safety inhibitions. A matrix structure has been demonstrated as the optimum structure for risk management, which should implement the idea of distributed control. Combination of effective operative information support with a system of open communication helps to develop conditions to change attitude of participants of underground coal mining towards risks to ensure safety. Originality.For the first time, the reasonability of combining matrix structure with distributed risk management has been demonstrated as well as substitution of unifactor discrete cumulative characteristic of explosion probability or methane ignition for analogous characteristic, dependent on several factors. Practical implications.Performance assessment throughout coal mines' operations improves reliability and safety of production processes and mining practices as well as provides for proactive risk management.
Purpose. To experimentally prove the fact of distant interaction between rock clusters during the irreversible displacements of rock mass. Disintegration of the rock mass does not necessarily imply loss in underground working stability. Methods.Telltales were used to monitor rock mass around the underground development working in conditions of intensive rock pressure manifestation.Findings. This experiment has demonstrated that the boundary of the rock mass failure expands asynchronously by spatially and temporally discrete increments. Such mechanism of the rock failure zone development is the consequence of the minimum entropy production principle according to which dissipative structures can occur in open thermodynamic systems.Originality. Distant interaction of rock clusters has been experimentally detected for the first time, which is important for geomechanics because it reveals the mechanism of the rock mass self-organization. Practical implications.The most efficient special technologies have been selected and quantitatively assessed for the control of rock mass state in conditions of severe rock pressure manifestation.
INCREASING OF DRAINAGE BOREHOLES STABILITY THAT DRILLED FROM SURFACE AND UNDERMINED BY LONGWALLS Mechanism of drainage boreholes destruction that drilled from surface and undermined by longwalls is determined. Method of stability providing and labor ability of boreholes is developed. ВВЕДЕНИЕТекущая дегазация угольных месторо-ждений скважинами, пробуренными с по-верхности, является перспективным на-правлением при их комплексном освоении [1]. Применение указанного способа дега-зации позволяет решить комплекс про-блем, связанный с повышением безопасно-сти ведения подземных горных работ, снижением выбросов парниковых газов в атмосферу, возможностью полезного ис-пользования метановоздушной смеси в ка-честве энергоносителя. Также необходимо учитывать возможность выполнения буро-вых работ с земной поверхности. Ключе-вая особенность способов текущей дегаза-ции -обязательная подработка дегазируе-мого массива горных пород длинными очистными забоями. В связи с этим дега-зационные скважины, находящиеся в ак-тивной фазе извлечения метана, испыты-вают негативное влияние процессов в под-работанном массиве, выражающееся в их частичном или полном разрушении [2], что существенно снижает эффективность дега-зации [3]. ПРИМЕНЕНИЕ ДЕГАЗАЦИОННЫХ СКВАЖИН В ПАО «ШАХТОУПРАВЛЕНИЕ «ПОКРОВСКОЕ»Сбор данных по работе и состоянию дегазационных скважин выполнялся в ПАО «Шахтоуправление «Покровское», которое отрабатывает угольный пласт 4 d на глубине 700 -900 м в сложных горно-геологических условиях, характеризуе-
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