原煤和型煤吸附瓦斯变形规律研究详解.docVIP

中文题目：原煤和型煤吸附瓦斯变形规律研究 外文题目：RESEARCH ON DEFORMATION LAW OF ADSORPTION OF BRIQUETTES AND COAL SAMPLES 毕业设计（论文）共 73 页（其中：外文文献及译文24页）图纸共0张 完成日期 2015年6月15日 答辩日期 2015年6月22日 摘 要 研究煤体吸附瓦斯变形规律对指导矿井内瓦斯抽采，防治煤与瓦斯突出事故发生，完善煤与瓦斯共存，减缓温室效应日益加剧，开采新型清洁能源，发展煤层气开采技术等具有重要意义。 本文以原煤和型煤为研究对象，利用煤层气高压吸附解吸变形装置，采用试验研究的方法，探究煤体在抽真空阶段及0.5MPa、1.0MPa、1.5MPa吸附气体压强下的变形量与时间的关系。对比研究了在抽真空与不抽真空条件下，以及煤体在横向与纵向上变形量随时间的变化规律。 试验结果表明：（1）在抽真空阶段，原煤在横向和纵向上的变形量均小于型煤在横向和纵向上的变形量。且随着吸附气体压力的增大，两种煤体的变形量逐渐减小。（2）煤体在吸附气体产生变形时，原煤在横向和纵向上的变形量均小于型煤在横向和纵向上的变形量。（3）两种煤体吸附膨胀应变与时间曲线有相似的变化趋势，且由图像可将煤体变形量随时间的变化曲线分为快速增长、缓慢增长和平衡三个阶段。（4）吸附气体的压力越大，煤体吸附气体后产生的变形量越大。 关键词：吸附 ABSTRACT Coal gas adsorption studies to guide the deformation of mine drainage of methane, coal and gas outburst prevention of accidents, improve coal and gas coexist, slow down the greenhouse effect increasing exploitation of new clean energy, the development of coal-bed methane mining technology has important significance. In this paper, coal and coal for the study, the use of high-pressure adsorption desorption CBM deformable means, using the method of experimental study to explore coal in vacuum stage and 0.5MPa, 1.0MPa, 1.5MPa deformation under pressure of adsorbed gas and time relationship.Comparative studies in vacuum and not vacuum conditions, and coal deformation variation in the direction parallel to the bedding direction perpendicular to bedding over time. The results showed that: (1) In the vacuum stage, coal deformation in the direction parallel to the bedding and the vertical stratification were less than coal in the direction parallel to bedding and vertical bedding plane deformation. And with the increasing pressure of adsorbed gas, coal in the form of two variables decreases. (2) When the adsorbed gas coal deformed coal deformation on parallel bedding and vertical stratification direction were less than coal in a parallel direction and the vertical bedding bedding plane deformation. (3) Both coal and Swelling strain versus t