岩土力学2012，Vol.33Issue(5)：1347-1351,5.
线弹性阶段卸轴压煤样内瓦斯流动特性试验研究
Experimental study of gas flow characteristics of coal sample under unloading axial stress in linear elastic stage
摘要
Abstract
Taking briquette as studied objects, taking gas flow speed of briquette as studied parameters, the gas flow characteristics of coal sample is studied under the complete stress-strain and unloading axial stress in linear elastic stage; the comparative analysis is done by comparing the gas flow characteristics of loading stage and unloading stage. The results show: the special stress point which makes the gas flow speed minimum appeared in gas flow curve of loading stage, and it belongs to the late of linear elastic stage. In the process of unloading axial stress in linear elastic stage, the reverse trend is shown between stress-stain curve and gas flow characteristical curve; the positive trend is shown between gas flow speed and initial gas flow speed of coal sample; the variation law of gas flow speed is more complex as the addition of strength, only the part of gas flow law is reproduction in the process of unloading axial stress. The laws of gas flow are different in the process of loading stage and unloading stage; the former is uniform change of two stages, the latter is hyperbolic. The influence caused by stress change on gas flow law is more sensitive; it is more obvious in local part of unloading stage.关键词
卸轴压/线弹性阶段/瓦斯流动/双曲线Key words
unloading axial stress/ linear elastic stage/ gas flow/ hyperbola分类
矿业与冶金引用本文复制引用
赵洪宝,汪昕,张鹏..线弹性阶段卸轴压煤样内瓦斯流动特性试验研究[J].岩土力学,2012,33(5):1347-1351,5.基金项目
国家自然科学基金项目(No.51004110) （No.51004110）
国家自然科学基金重点项目(No.50834005) （No.50834005）
中国矿业大学深部岩土力学与地下工程国家重点实验室开放基金项目(No.SKLGDUEK1114). （No.SKLGDUEK1114）
