温度对含瓦斯煤力学特性影响试验研究  

Experimental Research on Influence of Temperature on Mechanical Properties of Coal Containing Gas

作　　者：袁梅[1,2,3,4] 李波波[1,2,3,4] 杜育芹[5] 孟庆浩[1] 许石青[1,2,3,4] 

机构地区：[1]贵州大学矿业学院,贵州贵阳550025 [2]贵州省非金属矿产资源综合利用重点实验室,贵州贵阳550025 [3]贵州省优势矿产资源高效利用工程实验室,贵州贵阳550025 [4]复杂地质矿山开采安全技术工程中心,贵州贵阳550025 [5]中国矿业大学银川学院,宁夏银川750011

出　　处：《煤矿安全》2015年第11期6-9,共4页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(51264004;51574093);贵州省高校工程技术研究中心建设资助项目(黔教合KY字[2013]112);贵州省科技厅;贵州大学联合资金计划资助项目(黔科合LH字[2014]7654)

摘　　要：借助自主研发的三轴渗流装置,以贵州玉舍1#煤层250~380μm的型煤试件为研究对象,开展了不同温度条件下含瓦斯煤的三轴压缩试验,研究表明：不同温度条件下含瓦斯煤的全应力-应变曲线大体可以分为压密、线弹性、屈服和峰值及应变软化4个阶段;温度增加时含瓦斯煤的三轴抗压强度呈减小趋势;含瓦斯煤的刚度和强度均随温度升高而降低;升温过程含瓦斯煤的径向变形速度大于轴向变形速度,出现泊松比增大现象。Based on 250 to 380 μm briquette specimens of No. 1 seam of Yushe Coal Mine in Guizhou as study object,we carry out triaxial compression of coal containing methane under different temperatures with independent triaxial seepage device. The research indicates that the complete stress-strain curves of coal containing gas can be roughly divided into four phases that are compaction phase,linear elastic phase,yield phase,peak value phase; the triaxial compression strength of coal containing gas shows decreasing trend when the temperature increases; the inflexibility and intensity of coal containing gas decreases with increasing temperature; during the increasing process of temperature,the velocity of radial deformation is larger than the velocity of axial deformation,resulting in the phenomenon of Poisson’s ratio increasing.

关 键 词：温度 含瓦斯煤 三轴压缩 全应力应变 力学特性 

分 类 号：TD713[矿业工程—矿井通风与安全]