论文中文题名: | 渭北煤田地质构造发育规律研究 |
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学号: | 201111512 |
保密级别: | 公开 |
学科代码: | 081803 |
学科名称: | 地质工程 |
学生类型: | 硕士 |
学位年度: | 2014 |
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专业: | |
研究方向: | 煤田地质 |
第一导师姓名: | |
论文外文题名: | The Research of Development Regularities of Geological Stucture in Weibei Coalfield |
论文中文关键词: | |
论文外文关键词: | structure law ; structural control of coal ; Weibei P-C coalfield |
论文中文摘要: |
随着煤炭资源开采速度的加快,渭北石炭-二叠纪煤田面临资源枯竭,开采地质条件恶化的局面;为满足高效生产,需深入研究构造特征及赋煤规律。
本文在详细分析渭北煤田地质构造发育特征和煤层赋存规律的基础上,分别对聚煤前古构造、同沉积构造及聚煤后期构造运动进行研究,得出渭北煤田构造发育特征,同时分析不同时期构造运动对煤层赋存规律的影响,得出以下结论:
(1)古构造及古植物条件,决定了晚石炭世才形成良好的聚煤环境。
(2)中央古隆起及38°构造带从古构造延续到同沉积构造,使鄂尔多斯盆地晚古生代煤层聚集规律具有东西分带、南北分区的现象。
(3)受中央古隆起的影响,渭北煤田基底总体沉降幅度及含煤性皆以韩城矿区最好,澄合矿区次之,蒲白和铜川矿区最差。
(4)渭北煤田中部以断裂构造为主,东西两侧以褶皱构造为主。由4个NE向和3 个近EW向断层密集带互相交织并向煤田中部收敛,形成渭北煤田构造格局。
(5)构造的组合形式有 “入”字型、雁列式、阶梯状、地垒、地堑及叠瓦式逆断层等。构造对煤层的埋深、产状、煤质等均有影响;常使煤层发生断失、拉伸变薄,影响煤矿安全生产。
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论文外文摘要: |
With the speeding up of the coal resources mining speed, Weibei P-C coalfield facing resource depletion and deterioration of mining geological conditions; To achieve efficient production, it is necessary to further study of tectonic characteristics and law of coal.
This paper analyses the basic characteristics and law of coal of geological structural development on Weibei coalfield,study on palaeostructure, syndepositional structures and the late tectonic movement,work out the structure development characteristics of Weibei coalfield ,and analysis of different periods tectonic movement influence on coal seam occurrence regularity, the following conclusions:
(1) Ancient structures and plant conditions, determine the late carboniferous epoch to form a good coal accumulating environment.
(2) The central paleo uplift and 38°N structural bet from paleostructural continue to syndepositional structures, make the ordos basin in the late palaeozoic coal accumulation zoning, the phenomenon of the north.south partition.
(3) Influenced by the ancient uplift, Weibei coalfield base overall settlement amplitude and coal.bearing properties are best mining area in Seoul, chengcheng close second mining area, the Pope and tongchuan mining area is the worst.
(4) In Weibei coalfield in the middle part of the main faults,things on both sides to fold.By 4 NE.trending fault concentrated bet and 3 EW. trending fault concentrated bet interweave each other and to the coal field in central convergence, form a pattern of coalfield structure of weihe river.
(5) The combination of structure form are "λ" shaped structure, echelon structure, ladder shaped structure, horst, graben and imbricated thrust, etc. Construction of buried depth, the occurrence of the coal seam and coal quality have influence; make coal seam breakage, stretched thin, impact of coal mine safety production.
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中图分类号: | P618.11 |
开放日期: | 2014-06-06 |