韦四井田太原组沉积特征及煤岩层对比分析  

Taiyuan Formation sedimentary characteristics and coal correlation of Weisi mine field

作　　者：魏向成 何伟 谢变宁 闫丽佳 

机构地区：[1]宁夏回族自治区矿产地质调查院,宁夏银川750021

出　　处：《洁净煤技术》2016年第2期119-123,共5页Clean Coal Technology

基　　金：宁夏自然科学基金资助项目(NZ13251)

摘　　要：为综合分析韦州矿区韦四井田煤层赋存展布特征,为计算资源量及后期开发提供依据,在井田勘查过程中,通过各层段砂岩及沉积层系特征、煤层层间距、煤层组合特征结合标志层以及测井曲线对比等方法进行煤层综合对比,确定了井田太原组13层可采煤层,煤层对比可靠性较高。研究表明,太原组在本区表现为早期海退、中期海进、晚期海退的沉积过程,煤层多形成于早期海退阶段和晚期海退阶段,成煤环境以近滨三角洲平原沼泽为主,早期海退过程的滨海三角洲平原沼泽形成主要可采煤层;海湾泻湖沼泽形成一些煤线和薄煤层。In order to comprehensively master the seams distribution characteristics of Weisi mine field,the seams were compared from the aspects of sandstone and sedimentary series characteristics,interlamellar spacing,combination characteristic of coal seams and logging curve comparison. The No. 13 coal seam of Taiyuan Formation was determined as minable coal seam. The deposition of Taiyuan Formation exhibited a process of early regression,transgression and late regression. Most of coal seams formed in the two regression stages,and the main coal-forming environment was nearshore deltaic plain swamp which formed the main minable coal seams in the early regression. The largoon swamp formed coal streaks and thin seams.

关 键 词：韦四井田 太原组 煤层 沉积特征 煤层对比 

分 类 号：TD15[矿业工程—矿山地质测量]