Locating Neutral Surface of Fold and Its Application in Laohe Syncline in Liupanshui Area
详细信息
- 责任者：Gu Hongxing (The School of Resource and Earth Science ; China University of Mining and Technology ; Xuzhou 221008 ; China) ; Fu Xuehai
- 刊名：Coal Geology & Exploration
- 出版年：2011
- 卷期：39(5)
- 关键词：煤层 ; coal seam ; 泊松比 ; Poisson’s ration ; 煤岩 ; coal rocks ; 六盘山 ; Liupan Mountains
- 页码：p.11-14
- 图表：2 illus., 3 tables, 8 refs.
- 分类号：1004
- 出版序号：1847
- issnNo：ISSN1001-1986
- isbnNo：CN61-1155/P
摘要
Based on elastic thin plate theory, the authors have studied the questions about locating neutral surface of fold when the rock formation of fold is under pure buckling only,and obtained the location formula of neutral surface of fold with main parameters of modulus of elasticity,Poisson’s ratio,and thickness of each rock formation.Combined with Laohe syncline of Liupanshui coalfield in Guizhou Province,the neutral surface of Laohe syncline was located in the fine sandstone of coal seam 9# floor of Longtan Formation,as far as 966 m from the bottom of Maokou Formation.The nearer the distance of coal seam to neutral surface was,the less the fold structure influence on gas occurrence was,resulting in less difference between the gas content of coal seam near neutral surface and that of wing of syncline.
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