Determination of indices and critical values of gas parameters of the first gas outburst in a coal seam of the Xieqiao Mine  

作　　者：Ou Jianchun Liu Mingju Zhang Chunru Liu Yanwei Wei Jianping 

机构地区：[1]School of Safety Engineering,Chino University of Mining&Technology,Xuzhou 221008,China [2]Science and Engineering,Henan Polytechnic University,Jiaozuo 454003,China [3]Xieqiao Mine of Huainan Mining Industry Group,Huainan 232001,Chino

出　　处：《International Journal of Mining Science and Technology》2012年第1期89-93,共5页矿业科学技术学报（英文版）

基　　金：supported by the National Key Basic Research Program of China (No.2005CB 221501);the Innovation Scientists and Technicians Troop Construction Projects of Henan Province (No.084200510002);the Program for New Century Excellent Talents in University (No.NCET-07-0257)

摘　　要：Based on the important role in mine safety played by parameters of the first gas outburst, we propose a method of combining historic data, theoretical analysis and experimental research for the purpose of crit- ical values of gas parameters of the first gas outburst in a coal seam of the Xieqiao Mine. According to a characteristic analysis and a summary of the rules of coal and gas outbursts in the No.8 coal seam of a Hua- inan mine, we have investigated their effect on coal and gas outbursts in terms such as ground stress, gas, and coal structure. We have selected gas parameters and determined the critical values of each of the fol- lowing indices： gas content as 7.7 m^3/t, tectonic coal as 0.8 m thick, the absolute gas emission as 2 m3/min, the rate of change as 0.7 m3/min, the gas desorption index of a drilling chip KI as 0.26 mL/（g min^1/2） and the values of desorption indexes Ah2 as 200 Pa. From a verification of the production, the results indicate that application of each index and their critical values significantly improve the level of safety in the pro- duction process, relieve the burden upon the mine, save much labor and bring clear economic benefits.Based on the important role in mine safety played by parameters of the first gas outburst, we propose a method of combining historic data, theoretical analysis and experimental research for the purpose of critical values of gas parameters of the first gas outburst in a coal seam of the Xieqiao Mine. According to a characteristic analysis and a summary of the rules of coal and gas outbursts in the No.8 coal seam of a Huainan mine, we have investigated their effect on coal and gas outbursts in terms such as ground stress, gas, and coal structure. We have selected gas parameters and determined the critical values of each of the following indices: gas content as 7.7 m 3 /t, tectonic coal as 0.8 m thick, the absolute gas emission as 2 m 3 /min, the rate of change as 0.7 m 3 /min, the gas desorption index of a drilling chip K 1 as 0.26 mL/(g min 1/2 ) and the values of desorption indexes 4h 2 as 200 Pa. From a verification of the production, the results indicate that application of each index and their critical values significantly improve the level of safety in the production process, relieve the burden upon the mine, save much labor and bring clear economic benefits.

关 键 词：Parameters of first gas outburst Gas content Thickness of tectonic coal Critical value Coal and gas outbursts 

分 类 号：TD713[矿业工程—矿井通风与安全] TE933.102[石油与天然气工程—石油机械设备]