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《Natural Gas Industry》 2008-07
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STATUS AND PROBLEMS OF DRAINAGE AND UTILIZATION OF DOWNHOLE COALBED METHANE IN COAL MINES IN CHINA

ZHAI Cheng1,2,LIN Bo-quan1,2,WANG Li1,2(1 School of Safety Engineering,China University of Mining & Technology;2 National Engineering and Research Center of Coal Gas Control).  
In order to better utilize downhole coalbed methane,statistical analysis is performed on drainage of downhole coalbed methane over the years in China.It is revealed that the total volume of drainage is growing year by year in China,but the drainage rate is relatively low and the effect is poor.Downhole drainage of coalbed methane is still at the initial stage,the amount of coalbed methane gas utilized is relatively small,the utilization ratio is relatively low,and the utilization projects are concentrated in some big state-owned coal mines with relatively large volume of drainage coalbed methane,especially in the 45 focal enterprises for safety monitoring.Finally,the causes of low drainage rate are analyzed in objective and subjective aspects,and solutions of these problems are proposed based on the latest research results both at home and abroad:①to test and deploy integrated gas drainage methods on highly-productive and highly-efficient faces;②to change the conception of gas drainage;③to carry out research on gas drainage technologies to enhance gas drainage;④to strengthen study on techniques such as gas concentration,storage and transportation,and eliminate the adverse factors such as instability of gas volume and concentration,as well as high cost of storage and long distance transportation;⑤to develop new approaches of gas utilization adaptable to the scale and concentration of gas drainage,reach a compromise between safe production and maximization of gas utilization,and ensure the full utilization of gas resources.
【Fund】: 国家科技支撑计划项目(编号:2007BAK29B01);; 国家自然科学基金项目(编号:50534090、50574093);; 国家重点基础研究发展计划(973计划)项目(编号:2005CB221506)的联合资助
【CateGory Index】: F426.2
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