Investigation of immediate roof’s GSI variations effects on periodic roof weighting interval of underground coal mines By Numerical method
Subject Areas :اصغر Nourozi 1 , کاظم Ouroei 2 , مهرداد Javadi 3 , کامران Goshtasbi 4
1 - دانشجوی دکترای تخصصی مهندسی معدن، دانشگاه آزاد اسلامی، واحد علوم و تحقیقات، تهران
2 - عضو هیئت علمی دانشگاه تربیت مدرس، گروه مهندسی معدن ،تهران
3 - عضو هیئت علمی دانشگاه آزاد اسلامی، گروه مهندسی مکانیک واحد تهران جنوب، تهران
4 - عضو هیئت علمی گروه مهندسی معدن دانشگاه تربیت مدرس، تهران
Keywords: Finite Element, Longwall mining, Immediate roof, Roof weighting Interval, GSI,
Abstract :
Nowadays, the longwall mining method is one of the most usage methods in coal mining. Estimating of periodic roof weighting interval in longwall methods is one of the most importantparameters in safety and success of coal mines production. Because, selecting of a lengths lessthan real size can hazard the miners’ life by electing a weak support system and also selectingthe lengths more than real size constrain further costs to mine. In other hand, discontinuitiesof roof have negative effects to stability of immediate roof. In this research, equation betweenperiodic roof weighting interval and GSI variations is extracted by numerical modeling. Toevaluating this equation, the roof weighting interval of ten coal mines of India is considered.The results show that, the roof weighting interval of India’s coal mines and the results of thisequation are properly same together.
