摘要
采用自主研发的温控三轴瓦斯渗透实验装置,以深部高地温矿井煤样为对象,研究了温度、围压和瓦斯压力等参数对煤体渗透特性的影响。采用控制变量法分析了不同条件下渗透率随孔隙压力、围压和温度的变化。实验温度范围30℃~50℃,应力3~5 MPa,瓦斯压力1~4.5 MPa。研究结果表明：在相同围压条件下,煤样渗透率随孔隙压力增大先减小后增大,变化曲线呈二次函数关系;实验温度范围内,煤样渗透率随着温度升高逐渐下降;渗透率随围压增大逐渐减小。
The paper studied the influence of parameters on the permeability of coal characteristics, such as temperature, confining pressure and gas pressure. The tests carried out by means of a triaxial permeability test equipment that developed independently. Specimens were taken from deep coal seam. The experiment adopted control variable method to analyze the permeability changes in different pore pressure, confining pressure and temperature. Experimental temperature ranges from 30℃ to 50℃, stress 3 - 5 MPa, and gas pressure 1 -4. 5 MPa. The results show that under the same confining pressure conditions, with the increase of pore pressure, the permeability of coal samples first decreases and then increases ; with the decrease of temperature, the permeability of coal sample reduces; with the increase of confining pressure , the permeability of coal sample gradually reduces.
出处
《世界科技研究与发展》
CSCD
2015年第4期364-367,共4页
World Sci-Tech R&D
基金
国家自然科学基金(51204088)资助
关键词
渗透率
温度
围压
瓦斯压力
裂隙
permeability
temperature
confining pressure
gas pressure
fracture
