龙固井田3煤层顶底板沉积环境及演化  

Sedimentary Environment and Evolution of Coal No.3 Roof and Floor in Longgu Minefield

作　　者：徐栓祥 Xu Shuanxiang(Shandong Energy Xinwen Group Xin Julong Co.Ltd.,Heze,Shandong 274918)

机构地区：[1]山东新巨龙能源有限责任公司,山东菏泽274918

出　　处：《中国煤炭地质》2018年第10期20-25,共6页Coal Geology of China

摘　　要：在深部煤层开采过程中,煤层顶底板安全受到很大影响。在开采煤层巷道设置、预测煤层分布等工作上容易造成很大误差,甚至引起地质灾害,使原有设计目标落空,以龙固井田为例,从煤层顶底板入手,采用沉积学与矿井地质学方法,来开展煤层顶底板沉积旋回研究,将顶底板划分为三个沉积旋回(底板cycle1、顶板cycle2、cycle3),着重阐述了不同沉积旋回和沉积相的特点,其中底板cycle1旋回为三角洲前缘-三角洲平原的沉积特征,具有分流河道处砂体较厚,分流间湾处砂体薄的特点;顶板cycle2为典型的三角洲平原沉积,具有分流河道处砂体较厚,分流间湾处砂体薄的特点;顶板cycle3为曲流河沉积,具有河道处砂体较厚,泛滥盆地处砂体薄的特点。本研究成果对深部矿井煤层顶底板稳定性和动力分区研究有一定的指导作用。During the deep part coal extraction process, coal seam roof and floor will be subjected to great impact. On coal extraction roadway set up, coal seam distribution prediction etc. can easily cause major errors even lead to geological hazard, make original de- signed target frustrated. Taking the Longgn minefield as example, start from coal roof and floor, through sedimentological and mine ge- ological methods carried out coal roof and floor sedimentary cycle study, partitioned them into 3 sedimentary cycles （floor cycle 1, roof cycles 2 and 3 ）. The emphasis is on the features of different sedimentary cycles and sedimentary facies. In which, floor cycle 1 is delta front - delta plain sedimentation with distributary channel thick sand mass and interdistributory bay thin sand mass features ; roof cycle 2 is typical delta plain sedimentation with distribntary channel thick sand mass and interdistribntory bay thin sand mass features; roof cycle 3 is meandering stream sedimentation with channel thick sand mass and flood basin thin sand mass features. The studied result has certain guiding significance on deep part mine coal roof and floor stability and dynamic zoning research.

关 键 词：煤层顶底板 砂体分布 沉积相 沉积旋回 

分 类 号：P618.11[天文地球—矿床学]