TN1205 : Outburst prediction in coal mines by seismic method. (Case study: Tabas Parvadeh No 1 coal mine)
Thesis > Central Library of Shahrood University > Mining, Petroleum & Geophysics Engineering > MSc > 2024
Authors:
Seyyed Ali Seyyedalangi [Author], Farhang Sereshki[Supervisor], Amin Roshandel Kahoo[Supervisor], [Advisor]
Abstarct: Coal and Gas Outburst seriously threaten the safety of coal mines. As the coal mines deepen and the stress and gas content of the coal laxyer increase, the need for a more efficient and accurate method to predict and deal with this phenomenon increases. Mine No. 1 of Tabas Parvadeh Coal Company, due to the deepening of mine, is faced with Coal and Gas Outburst in development and production faces and Each time, only seconds before the occurrence of this phenomenon, the mining personnel present there have noticed its occurrence through signs such as an increase in temperature and concentration of methane gas and the throwing of coal. So far, there have been more than 70 cases of Coal and Gas Outburstd in this mine, which in most cases led to work stoppage and equipment damage and only one case resulted in the death of a miner. According to the mentioned cases, foreign companies and the technical office of Tabas Parvadeh Coal Company have tried to predict and prevent this dangerous and fatal phenomenon, but they have not achieved much success. In this research, first the phenomenon of Coal and Gas Outburst and the difficulty of prediction and prevention of it were introduced. Then the solutions of various companies that have been invited to cooperate in this mine to overcome this issue were examined and the reasons for the ineffectiveness of each proposed method were stated. One of the methods of monitoring and predicting mine instabilities and the Coal and Gas Outburst is Microseismic monitoring method. According to the conducted research, the microseismic method is able to perform real time monitoring of the instabilities of the mine and the Coal and Gas outburst. In this method, seismic sensors are placed in the area according to a specific and pre-designed pattern and the data of the characteristics of obtained waves from these sensors are compared with the data of characteristics of the Coal and Gas Outburst waves and if there is a match, an alarm of Coal and Gas Outburst will be announced. Considering the ineffectiveness of the previously presented methods, the microseismic monitoring method is recommended to predict the Coal and Gas Outburst in the mine No. 1.
Keywords:
#Coal #Gas content #Coal and Gas Outburst #Microseismic #Stress. Keeping place: Central Library of Shahrood University
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