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以贵州矿区玉舍煤矿1#煤层3种不同粒径的型煤试件为研究对象,借助MTS815岩石力学伺服系统及自主研发的三轴渗流设备分别开展单轴压缩试验和三轴渗流试验,研究表明:含瓦斯型煤单轴抗压强度随粒径变化呈反相关关系,含瓦斯型煤抗破坏能力随粒径减小而增大;含瓦斯型煤弹性模量随粒径变化亦呈反相关关系;若有效应力恒定,3种粒径含瓦斯型煤渗透率均随温度升高而降低。若温度不变,3种粒径含瓦斯型煤渗透率随有效应力增加而减少;若温度和有效应力均恒定,300~450μm粒径含瓦斯型煤渗透率最高。相同粒径含瓦斯型煤渗透率随有效应力升高而降低。
Taking the 3 coal samples with different grain sizes of coal seam # 1 in Yushe Coal Mine of Guizhou Mining Area as the research object, uniaxial compression tests and triaxial seepage tests were carried out by using the MTS815 rock mechanics servo system and self-developed three-axis seepage equipment respectively It shows that the uniaxial compressive strength of gas containing coal varies inversely with the change of particle size, and the destructive capacity of gas containing coal increases with the decrease of particle size. The elastic modulus of gas containing coal briquette also changes inversely with the particle size If the effective stress is constant, the permeability of three kinds of coal briquette containing coal gas decreases with the increase of temperature. If the temperature is unchanged, the permeability of three types of coal containing gas decreases with the increase of effective stress. If the temperature and effective stress are constant, the permeability of gas containing 300 ~ 450μm coal is the highest. The permeability of gas coal with the same particle size decreases with the increase of effective stress.