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《Coal Science and Technology》 2014-07
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Study on Causes of Gas Abnormal Emission from Limestone Cracking Development Zone

CAO Zhao-qi;Zhengzhou Design and Research Institute Company Limited of Coal Industry;  
In order to solve gas disasters frequently occurred in coal mines with low gas emission,with the analysis conducted on gas control status of Yitang Coal Industry,the gas geological theory was applied to study the causes of the gas abnormal emission from local seam. The study held that the geological structure role could make the strata affected with crumpled broken,thus could make cracking development of the roof limestone and could make a large amount of free state gas stored in the cracks. In the cracking development zone of the limestone affected by the mining and excavation activities,a centralized emission of free state gas would cause a local gas abnormal emission. Therefore,the paper analyzed the gas generation condition,gas storage condition and gas cap rock condition affected to the gas emission quantity.The advance exploration borehole,gas drainage borehole drilled at the seam and seam with roof jointed location,pressure balancing ventilation,increased ventilation of the coal mining face,enhanced management of the mine electric and mechanical equipment and others measures were applied to prevent the coal and gas accident occurred.
【Fund】: 国家自然科学基金资助项目(50904024)
【CateGory Index】: TD712
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