采空区遗煤残余瓦斯含量及解吸规律与遗煤粒径的关系  

Relation of Residual Gas Content and Desorption Rule of Coal Left in Gob with Coal Particle Size

作　　者：马代辉[1,2] MA Daihui(State Key Laboratory of Gas Disaster Monitoring and Emergency Technology,Chongqing 400037,China;China Coal Technology and Engineering Group Chongqing Research Institute, Chongqing 400037, China)

机构地区：[1]瓦斯灾害监控与应急技术国家重点实验室,重庆400037 [2]中煤科工集团重庆研究院有限公司,重庆400037

出　　处：《矿业安全与环保》2017年第2期16-20,共5页Mining Safety & Environmental Protection

基　　金："十三五"国家科技重大专项(2016ZX05045001-006)

摘　　要：为提高煤矿采空区遗煤可抽采瓦斯量评估的准确性,利用自主研制的采空区遗煤残余瓦斯解吸模拟实验装置,模拟密闭采空区条件下的不同粒径煤样瓦斯解吸过程,拟合并推导出遗煤残余瓦斯解吸速度与时间、粒径的函数关系式,以及遗煤累计瓦斯解吸量经验计算公式。验证表明,所推导的遗煤瓦斯解吸公式能够较好地描述粒径对实验煤样瓦斯解吸规律的影响,能较好地体现粒径对煤样累计瓦斯解吸量变化的影响。In order to improve the assessment accuracy of gas drainage volume from the residual coal in coal mine gob,a self-developed simulation testing device for gas desorption from residual coal in the gob was used to simulate the gas desorption process from coal samples with different particle sizes under the condition of a simulated air-sealed gob,the functional relation expression of the gas desorption velocity from residual coal with the time and particle size and the empirical calculating formula for the cumulative gas desorption volume of the residual coal were fitted and derived.It was verified that the derived formula for the gas desorption from residual coal could better describe the influence of the particle size on the gas desorption rule of the coal sample and also better reflect the influence of the particle size on the cumulative gas desorption volume.

关 键 词：采空区 遗煤 残余瓦斯含量 粒径 模拟实验 

分 类 号：TD712.67[矿业工程—矿井通风与安全]