淮南煤田第四含煤段砂体的演化特征及对煤层厚度的控制  

Evolvement characteristic of sand bodies in the fourth coal-bearing interval and its control on coal thickness, Huainan coalfield

作　　者：刘衡秋[1] 刘钦甫[1] 彭苏萍[1] 谭儒蛟[2] 付正[1] 

机构地区：[1]中国矿业大学煤炭资源教育部重点实验室,北京100083 [2]中国科学院地质与地球物理研究所,北京100029

出　　处：《煤田地质与勘探》2005年第1期7-10,共4页Coal Geology & Exploration

基　　金：国家计委高新技术产业化项目和教育部TRAPOYT项目资助

摘　　要：讨论了淮南煤田第四含煤段砂体的演化特征及其对 13- 1煤层厚度的影响。研究表明 ,煤层底板砂体展布型式变化较大 ,继承性较差 ,反映出网状三角洲平原上分流河道发育特点 ;顶板分流河道沉积作用以垂向加积作用为主 ,岩体演化具有较好的继承性 ;在靠近煤层发育的时期内 ,底板砂岩和煤层空间分布呈现互为消长的关系 ,而在顶板砂体发育的早期 。This paper discussed the evolvement characteristics of sand bodies of the fourth coal bearing interval and its influence on No.13-1 coal-seam thickness in Huainan coal field.The distribution type of sand-mass of coal-seam floor varied greatly and its continuity is worse, which reflected the development characteristics of distributary channel in braid delta-plane. In coal-seam roof,distributary channel sedimentations mostly are vertical accretion, and the continuity of sand body evolvement is well.Closing to the period of coal-seam growth,the space distribution types of sandstones of floor and coal seam are adverse each other;however,in the early time of sand bodies growth, sand bodies flushed and influenced the nether coal-seam obviously.

关 键 词：砂岩 砂体演化 分流河道沉积 煤层厚度 淮南煤田 

分 类 号：P618.11[天文地球—矿床学]