焦作矿区煤炭安全生产最高允许含气量分析  

Analysis on Permissive Highest Coal-bed Gas Content for Safe Coal Mining in Jiaozuo Coal Mining Area

作　　者：杨兆彪[1] 秦勇[1] 吴财芳[1] 

机构地区：[1]中国矿业大学资源与地球科学学院,江苏徐州221008

出　　处：《矿业安全与环保》2008年第5期15-17,21,共4页Mining Safety & Environmental Protection

基　　金：国家973计划项目(2002CB211704);国家自然科学基金项目(40572095)

摘　　要：利用建立的最高允许含气量求算模型,以焦作矿区4个采煤工作面为实例,求算了煤层最高允许含气量的分布特征,并分析了相关因素对煤层最高允许含气量的影响。测算结果表明:4个工作面煤层气平均最高允许解吸量为3.99 m3/t,最高允许含气量为12.32 m3/t,保障回风流瓦斯浓度不超限难度不大,不需要对煤层气进行预抽采。煤层含气性是决定煤矿安全生产最高允许含气量的地质基础,巷道通风能力、单位时间煤炭产量、煤炭回采率等开采因素是决定最高允许含气量的外在条件。This paper calculated the distribution characteristics of the permissive coalbed-gas content (PCBGC) and analyzed the effect of relative factors on PCBGC by using the mathematical model of PCBGC established in early period and taking four coal faces in Jiaozuo Coal-mining Area as example. The results showed that the desorbed quantity of the average permissive coal-bed gas in four working faces is 3.99m3/t, PCBGC is 12.32m3/t, so it is easy to safeguard the gas concentration if in return air in the allowed gas concentration range, and the coal-bed gas need not to be pre-drained and pre-extracted. The factor analysis indicated that the occurrence feature of coal-bed gas is the geological basis deciding the PCBGC of safe coal mining, and the mining factors such as the mine ventilation capacity of roadways, coal output per unit time and coal recovery rate are the external conditions deciding PCBGC.

关 键 词：安全生产 最高允许含气量 最高允许解吸量 影响因素 

分 类 号：TD712[矿业工程—矿井通风与安全]