欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
以组成不同的3种煤样为研究对象,采用密度计算法、扫描电镜等对其内部结构进行了研究,并采用自行研制的三轴瓦斯渗流仪对其内部的瓦斯流动特性进行了试验研究。结果表明：相同条件下由不同煤粉制备的型煤试件内部结构不同,但煤粉颗粒直径对煤样内部结构影响并非线性;煤样全应力应变过程中瓦斯流动特性复杂,总体呈先减小后增加趋势,且煤样初始瓦斯流动速度小于煤样破坏后的流动速度,瓦斯流动特性表现出明显的滞后性;煤样内部结构对其内的瓦斯流动特性影响呈非线性;煤样组成对其内瓦斯流动影响的应力状态的敏感性很强,煤样初始结构越复杂,对轴向载荷敏感性越差,而对围压的敏感性越强。
英文摘要：
Three kinds of coal samples with different components are chosen as study objects.Density calculation and SEM are adopted to study their internal structures,and a self-made triaxial gas seepage instrument is used to study their internal gas flow characteristics.The results show that internal structures of coal samples made of different particle size coal powders under identical external conditions are various,and nonlinearity is presented on the influence caused by fabric.Gas flow characteristic is complex in complete stress-strain process,generally it firstly increases and then decreases,initial gas flow velocity is lower than the one after the failure of coal sample,and obvious hysteretic nature of gas flow characteristic is showed.The influence of gas flow characteristic caused by initial-internal structure of coal sample is nonlinear and the stress-sensitivity is high on the influence of gas flow characteristic caused by initial-internal structure.The more complex the initial-internal structure of the coal sample is,the lower the axial tress-sensitivity is,and the higher the confining pressure-sensitivity is.
同期刊论文项目
同项目期刊论文
Test analysis of deformation characteristics and compressive strengths of two types of coal specimen
Photo-elastic experimental and field measurement study of ground pressure of surrounding rock of lar
Test study of gas seepage characteristics of gas-bearing coal specimen during process of deformation
Experimental study of gas permeability of outburst coal briquettes in complete stress-strain process
In-situ experimental study on the relation of drilling cuttings weight to ground pressure and gas pr
Test study on coupling relationship between permeability characteristics and stress of outburst coal
Experimental study of influence of confining pressure unloading speed on mechanical properties and g
Experiment of deformation property and gas permeation of containing-gas coal under confining pressur
An experimental study of gas permeabilities of outburst and nonoutburst coals under complete stress-
Experimental study on properties of transverse strain and gas flow of coal containing gas in process
Experimental study on evolution of mechanical parameters of coal containing gas under unloading conf
期刊信息
位置：