Locating neutral surface of fold and its application in Laohe syncline in Liupanshui area
-
摘要: 假定弯曲流动褶皱的多层岩层是由多个各向同性的弹性薄层粘合而成的非均匀板，基于弹性薄板理论，研究了褶皱岩层仅受纯弯曲作用时褶皱中和面的位置的确定问题，得出了用各岩层弹性模量、泊松比和岩层厚度表示的褶皱中和面位置公式。结合贵州六盘水煤田涝河向斜，计算了涝河向斜褶皱中和面处于龙潭组9号煤层的底板岩层细砂岩中，距茅口组底部966 m, 煤岩层距离中和面越近，褶皱构造对其瓦斯赋存影响越少，使得该处的瓦斯含量与翼部差值就越小。研究成果对煤层气开发及煤与瓦斯突出防治具有一定的指导作用。Abstract: The paper supposed that the rock formations of bending flowage fold is heterogeneous board agglutinated by many isotropic thin layers.Based on elastic thin plate theory, we 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 966m 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.Our research results have certain steering effects on coal bed methane exploitation and preventing coal and gas outburst.
-
Keywords:
- neutral surface of fold /
- pure bending /
- modulus of elasticity /
- Laohe syncline /
- gas content
-
-
期刊类型引用(9)
1. 樊振丽，曹路通，申晨辉，邵远洋. 近距离煤层垂向采空区高静储瞬态充水模式与解危技术. 能源与环保. 2024(05): 1-7 . 
百度学术
2. 张勃阳，张宇科，黄虎威，林志斌，李亚超. 基于相似模拟试验的顶板导水裂隙带高度及发育形态研究. 河南理工大学学报(自然科学版). 2024(04): 29-38 . 百度学术
3. 黄东兴，阳元中. 煤层群下煤层开采对上覆采空区积水影响程度研究. 煤炭技术. 2024(09): 68-71 . 百度学术
4. 李金华，郑承先，谷拴成，吴宝林，王雄，宋勇军. 直接顶-基本顶耦合作用下采场顶板断裂力学模型研究与应用. 煤田地质与勘探. 2023(07): 123-129 . 本站查看
5. 李星亮，黄庆享. 水体下特厚煤层综放开采导水裂隙带高度发育特征研究. 采矿与安全工程学报. 2022(01): 54-61 . 百度学术
6. 张兆宏，杨昌武，杨奋飞，王英伟. 煤矿采空塌陷区危险性预测模型构建及其防治措施. 能源与环保. 2022(12): 278-283 . 百度学术
7. 张真宁，庹云升，周诗楠，王涛. 老空区下煤炭资源开采覆岩导水裂隙发育规律数值模拟. 科技风. 2020(08): 204-205 . 百度学术
8. 杨天艺，秦洪岩. 1930煤矿河道下开采地表沉陷预计分析. 煤炭与化工. 2019(06): 48-50+53 . 百度学术
9. 田振焘，邢延团，张同俊. 大采空区强冲击地压条件下低位泄水技术与应用. 煤田地质与勘探. 2019(S1): 70-74 . 本站查看
其他类型引用(5)
计量
- 文章访问数: 57
- HTML全文浏览量: 11
- PDF下载量: 2
- 被引次数: 14
下载:
