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.
出处
《煤田地质与勘探》
CAS
CSCD
北大核心
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
关键词
砂岩
砂体演化
分流河道沉积
煤层厚度
淮南煤田
sandstone
sand-body evolvement
distributary channel sediment
coal-seam thickness
Huainan coal field
