Response of coal reservoir porosity to magma intrusion in the Shandong Qiwu Mine,China

Qiwu 矿位于山东省的十块 Xian 煤地。它经历了重复暴烈的活动，在形成的煤床以后，在岩浆侵入是重要的的地方。在岩浆侵入以后的煤水库孔的效果被分析学习地区性并且矿结构和 magmatic 活动。包括在显微镜和水银 porosimetry 下面的 maceral 测量的试验性的方法被用于测试毛孔结构。作者相信进低等级的沥青的煤的那岩浆侵入引起水库孔逐渐地增加：到 magmatic 岩石，一件样品越靠近，越不孔。毛孔尺寸分发也变化。在自然的煤床上，毛孔尺寸主要在及物、中间的毛孔范围。然而，煤改变到白煤，靠着 magmatic，岩石和更大的毛孔统治。热进化近引起了煤到要烤的 magmatic 岩石的地区性的岩浆，减少了不稳定的事，开发了更大的洞，并且破坏了植物织物洞。为在 magmatic 岩石的附近的孔减少的主要原因是源于烤的 Bituminite 充满开始是在场的洞。

The Qiwu Mine is located in the Ten Xian coal field of Shandong province.It experienced repeated volcanic activity,after the coal beds formed,where magma intrusion was significant The effect of coal reservoir porosity after magma intrusion was studied by analysis of regional and mine structure and magmatic activity.Experimental methods including maceral measurement under the microscope and mercury porosimetry were used for testing the pore structure.The authors believe that magma intrusion into low-rank bituminous coal causes reservoir porosity to gradually increase：the closer to the magmatic rock a sample is,the less the porosity.The pore size distribution also changes.In the natural coal bed the pore size is mainly in the transitive and middle pore range.However,the coal changes to anthracite next to the magmatic rock and larger pores dominate.Regional magma thermal evolution caused coal close to magmatic rock to be roasted,which reduced the volatile matter,developed larger holes,and destroyed plant tissue holes.The primary reason for a porosity decrease in the vicinity of magmatic rock is that Bituminite resulting from the roasting fills the holes that were present initially.