煤岩组合体力学特性与瓦斯渗流规律试验研究  

Experimental Study on Mechanical Properties and Permeability Evolution Law of Coal-rock Combination

作　　者：常悦[1] 张雅萍[2] 栗继祖[2] 王向玲[1] 马利云[1] 李燕[1] 

机构地区：[1]吕梁学院矿业工程系,山西吕梁033000 [2]太原理工大学矿业工程学院,山西太原030024

出　　处：《煤矿安全》2017年第6期28-31,39,共4页Safety in Coal Mines

基　　金：国家自然科学基金优秀青年科学基金资助项目(51422404);山西省高校哲学社会科学研究资助项目(2015310);吕梁市科技局资助项目(GG2015050)

摘　　要：利用三轴渗流测试系统,模拟不同厚度的顶板、煤层和底板条件,进行了不同岩煤高度比条件下煤岩组合试件的力学特性与渗流规律的试验研究。结果表明:对于不同岩煤高度比的煤岩组合试件,失稳破坏的峰值强度存在差异,且峰值强度随岩煤高度比的增加呈增大趋势;组合煤岩体的失稳破坏呈现宏观剪切破裂面,且破裂面贯穿顶、底部岩石;组合煤岩体的渗透率随轴向应变的升高呈现先减小到最小值后迅速增加的"V"型变化趋势;且随着岩煤高度比的增加,渗透率曲线反弹点对应的轴向应变呈增大趋势。Based on triaxial permeability test system, the strength characteristics and permeability evolution law of coal-roek specimens of different height ratios of rock to coal under the condition of simulating different thicknesses of roof-coal-floor are studied. The results show that the peak strength values for eoal-roek speeimens are different due to the different height ratios of rock to coal, and the peak stress increases with the height ratio. The broken and failure models of the coal-rock combination specimens show a macroscopic shear fraeture surface, and the fracture surface runs through the top and bottom rocks. With the increase of the axial strain, the permeability evolution law of the coal-rock combination specimen shows the ＂V＂ shape, which deereases to the lowest point first and then increases rapidly. And the corresponding axial strain of the permeability curve increases with the inerease of the height ratio of rock to coal.

关 键 词：煤与瓦斯共采 煤岩组合体 力学特性 渗透率 渗流规律 

分 类 号：TD712[矿业工程—矿井通风与安全]