Partitioning characteristics of gas channel of coal-rock mass in mining space and gas orientation method

作     者：Zhao Zhiqiang Ma Nianjie Jia Housheng Cheng Yuanping 

作者机构：School of Resource and Safety EngineeringChina University of Mining&Technology National Engineering Research Center for 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：2013年第23卷第6期

页      面：873-877页

核心收录：

学科分类：0819[工学-矿业工程] 081903[工学-安全技术及工程] 08[工学] 

基　　金：Financial supports for this work provided by the State Key Basic Research Program of China(No.2011CB201204) 

主　　题：Gas channel Partitioning characteristics Gas flow regime Gas orientation method 

摘      要：In order to research the influence of coal-rock mass morphology of mining space on the flow law of gas,the laboratory physical model and numerical computation methods were adopted to simulate coal mining *** simulation results indicate that,after coal seam mining,the loose rock accumulation body of free caving,ordered rock arrangement body of plate damage rich in longitudinal and transverse fractures and horizontal fissure body formed by rock mass deformation imbalance are formed from bottom to top in the mining *** these three types of accumulation bodies,there are essential differences in the accumulation state,rock size and gas breakover *** to this,the coal-rock mass in the mining space is classified into gas turbulence channel area,gas transitional flow channel area and gas seepage channel *** the turbulence channel area,the gas is distributed transversely and longitudinally and gas diffuses in the form of convection with Reynolds number R_e more than100;in the transitional flow channel area,one-way or two-way gas channels are crisscross and gas is of transitional flow regime with R,.between 10 and *** the seepage channel area,there are a few vertical gas channels with R,.less than *** this paper,the researches on the gas orientation method in different partitions were further carried out,gas orientation methods of low-level pipe burying,middle-level interception and high-level extraction were determined and an on-site industrial test was conducted,achieving the effective diversion of gas and verifying the reasonableness of gas channel partition.