淮北袁店8煤岩浆热蚀变的微组构响应
发布时间：2018-07-15 18:37
【摘要】：选取袁店8煤层内碎裂煤、焦油煤、天然焦和火夹焦为研究对象,研究其显微图像和拉曼光谱特征,揭示不同变质程度煤微组构特征及其对岩浆蚀变的响应。结果显示,碎裂煤以均质镜质体为主,微裂隙网脉发育,ID=3 500~7 300,IG=5 000~12 000;焦油煤由碎裂镜质体和少量煤焦油组构,ID和IG均介于1 000~3 500;天然焦由碳质中间相及其内部所包裹的气泡和焦油液滴组成,ID=430~700,IG=380~650;火夹焦由焦化基质及较小气泡和少量矿物微球组成,ID=920~1 560,IG=640~910。分析显示,趋近岩体,碳质组分由干燥破裂、挤压破碎向中间相和熔融态转变;碳质组分拉曼光谱IG/ID值逐渐降低。这表明,趋近岩体,煤层遭受破坏和变质程度逐渐增强,煤分子片层持续解聚,层间缺陷不断增加,碳质组分的结构有序度逐渐降低。
[Abstract]:The microscopic images and Raman spectra of broken coal, tar coal, natural coke and fire coke in Yuandian 8 coal seam were studied, and the characteristics of micro-fabric of coal with different metamorphic degrees and its response to magmatic alteration were revealed. The results showed that the fragmentation coal was mainly homogeneous vitrinite. Microfissure network vein development: ID3 500 7 300 GG 5 000 12 000; tar coal composed of clastic vitrinite and a small amount of coal tar fabric ID and IG are between 1 000 and 3 500; natural coke consists of bubbles and tar droplets encapsulated in the mesophase of carbonaceous substance. The chemical matrix, small bubbles and a small amount of mineral microspheres make up of ID-920 ~ (1 560) IGT 640 ~ (910). The analysis shows that the carbonaceous component changes from dry rupture to mesophase and melt state, and the IGP ID value of carbon component Raman spectra decreases gradually. This indicates that as the rock mass approaches, the coal seam is destroyed and metamorphosed gradually, the coal molecular lamellar is continuously deaggregated, the interlayer defects increase continuously, and the structural order degree of the carbonaceous component decreases gradually.
【作者单位】： 安徽大学资源与环境工程学院;安徽省煤田地质局第三勘探队;
【基金】：国家自然科学基金资助项目(41602173,41373108) 安徽大学博士科研启动经费联合资助项目(J10113190091)
【分类号】：TD315
本文编号：2125017
[Abstract]:The microscopic images and Raman spectra of broken coal, tar coal, natural coke and fire coke in Yuandian 8 coal seam were studied, and the characteristics of micro-fabric of coal with different metamorphic degrees and its response to magmatic alteration were revealed. The results showed that the fragmentation coal was mainly homogeneous vitrinite. Microfissure network vein development: ID3 500 7 300 GG 5 000 12 000; tar coal composed of clastic vitrinite and a small amount of coal tar fabric ID and IG are between 1 000 and 3 500; natural coke consists of bubbles and tar droplets encapsulated in the mesophase of carbonaceous substance. The chemical matrix, small bubbles and a small amount of mineral microspheres make up of ID-920 ~ (1 560) IGT 640 ~ (910). The analysis shows that the carbonaceous component changes from dry rupture to mesophase and melt state, and the IGP ID value of carbon component Raman spectra decreases gradually. This indicates that as the rock mass approaches, the coal seam is destroyed and metamorphosed gradually, the coal molecular lamellar is continuously deaggregated, the interlayer defects increase continuously, and the structural order degree of the carbonaceous component decreases gradually.
【作者单位】： 安徽大学资源与环境工程学院;安徽省煤田地质局第三勘探队;
【基金】：国家自然科学基金资助项目(41602173,41373108) 安徽大学博士科研启动经费联合资助项目(J10113190091)
【分类号】：TD315
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