山阳井田构造煤与原生结构煤的孔隙特征差异  

Differences of Pore Characteristics Between Deformed Coal and Undeformed Coal in Shanyang Mine Field

作　　者：严康[1] 韦乐乐[2] 马东民[3] 

机构地区：[1]甘肃省地矿局第三地质矿产勘查院,甘肃兰州730050 [2]西北大学地质学系大陆动力学国家重点实验室,陕西西安710069 [3]西安科技大学地质与环境学院,陕西西安710054

出　　处：《煤矿安全》2015年第6期26-28,共3页Safety in Coal Mines

摘　　要：为了研究山阳井田构造煤与原生结构煤的孔隙特征差异,对山阳井田构造煤与原生结构煤样品分别进行压汞、低温液氮吸附、扫描电镜等实验,结果表明与原生结构煤相比,构造煤的孔隙度、孔容、比表面积增大,其中大孔孔容、比表面积减少,中孔、小孔及微孔孔容、比表面积增大;构造作用促使构造煤中的惰质组破裂产生角砾,外形多呈不规则,尖角直棱,角砾之间没有位移或位移量很小,角砾孔多为大孔级孔隙,角砾孔大小以2μm左右居多,且连通性较好,相对有利于煤层气资源勘探开发。To study the difference of pore characteristics between deformed and undeformed coal in Shanyang mine field,the research was carried out for samples of deformed and undeformed coal by mercury injection,low-temperature nitrogen adsorption and scanning electron microscopy experiments. The results showed that the porosity,pore volume and specific surface area of deformed coal enlarged compared with undeformed coal. The pore volume and specific surface area of big pores decreased,while these of medium pores,little pores and micropores increased. Tectonism made inertinite break in deformed coal,and produced breccia. The appearance of breccia was irregular with sharp corner and straight edge,and there was no or little displacement between the breccia. Pores of the breccia were mainly about 2 μm and belonged to macroporous pores with better connectivity,which was relatively beneficial to the exploration and development of coal bed methane.

关 键 词：山阳井田 构造煤 原生结构煤 孔容 比表面积 孔隙特征 

分 类 号：TD163[矿业工程—矿山地质测量]