Regional gas drainage techniques in Chinese coal mines

作     者：Wang Haifeng Cheng Yuanping Wang Lei 

作者机构：National Engineering Research Center of Coal Gas ControlChina University of Mining & Technology 

出 版 物：《International Journal of Mining Science and Technology》 (矿业科学技术学报（英文版）)

年 卷 期：2012年第22卷第6期

页      面：873-878页

核心收录：

学科分类：0709[理学-地质学] 0819[工学-矿业工程] 0808[工学-电气工程] 081903[工学-安全技术及工程] 08[工学] 0818[工学-地质资源与地质工程] 0708[理学-地球物理学] 0807[工学-动力工程及工程热物理] 0815[工学-水利工程] 0813[工学-建筑学] 0814[工学-土木工程] 

基　　金：the State Key Basic Research Program of China(No.2011CB201204) the National Natural Science Foundation of China(Nos.51074160 and 50904068) 

主　　题：Coal and gas outburst Gas drainage Protective seam Pressure-relief gas Dense borehole 

摘      要：China s rapid economic development has increased the demand for *** results in Chinese coal mines being extended to deeper *** eastern Chinese,more economical developed,regions have a long history of coal mining and many coal mines have now started deep mining at a depth from 800 to 1500 *** increase in mining depth,geostresses,pressures,and gas content of the coal seam complicates geologic construction *** permeability and softer coal contribute to increasing numbers of coal and gas outburst,and gas explosion,disasters.A search on effective methods of preventing gas disasters has been provided funds from the Chinese government since *** National Engineering Research Center of Coal Gas Control and the Huainan and Huaibei Mining Group have conducted theoretical and experimental research on a regional gas extraction *** results included two important ***,grouped coal seams allow adoption of a method where a first,key protective layer is mined to protect upper and lower coal seams by increasing permeability from 400 to 3000 *** of gas and gas extraction in the protected coal seam of up to 60%,or more,may be achieved in this ***,a single seam may be protected by using a dense network of extraction boreholes consisting of cross and along-bed *** with this is increased use of water that increases extraction of coal seam gas by up to 50%.Engineering practice showed that regional gas drainage technology eliminates regional coal and gas outburst and also enables mining under low gas *** research results have been adopted into the national safety codes of production *** paper systematically introduces the principles of the technology,the engineering methods and techniques,and the parameters of regional gas *** applications are discussed.