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潘三矿11—2煤层瓦斯赋存主控因素分析

2015-07-21周鑫隆柏发松石必明穆朝民

周鑫隆 ++柏发松++石必明 ++穆朝民

摘要:为了研究淮南潘三矿11-2煤层的瓦斯赋存规律和主控因素,运用瓦斯地质理论和线性回归的方法,结合潘三矿地质勘探期间瓦斯地质资料和现场实测瓦斯数据,分析了11-2煤层瓦斯赋存特征,探讨了煤层瓦斯赋存与埋藏深度、地质构造、顶底板岩性、煤厚和煤体结构之间的关系。结果表明:煤层埋深、地质构造和顶板岩性是影响11-2煤层瓦斯赋存的主要控制因素,煤厚增加使得瓦斯含量也相应增大,构造软煤的不均匀分布在一定程度上增大了瓦斯突出危险性,从而为潘三矿煤与瓦斯突出危险性预测提供了依据。

关键词:瓦斯赋存;瓦斯含量;瓦斯压力;主控因素;回归分析

中图分类号:TD712.2文献标志码:A

[WT]文章编号:1672-1098(2015)01-0050-05

收稿日期:2014-07-31

作者简介:周鑫隆(1989-),男,湖北襄阳人,在读硕士,研究方向:安全科学与工程。

[JZ(〗[WT3BZ]Analysis of Main Influencing Factors of Gas Occurrence in 11-2 Coal Seam in Pansan Coal Mine

ZHOU Xin-long1,BO Fa-song2,SHI Bi-ming1,MU Chao-min1

(1. School of Energy and Safety, Anhui University of Science and Technology, Huainan Anhui 232001, China; 2. Pansan Coal Mine, Huainan Mining Group Co., Ltd., Huainan Anhui 232001, China)

Abstract:In order to study gas occurrence regularity in 11-2 coal seam in Pansan Coal Mine and the main influencing factors, the features of gas occurrence in 11-2 coal seam was analyzed and the gas occurrence in dependence on coal seam depth, geological structure, roof and floor lithology, coal body structure was discussed. The results showed that coal seam depth, geological structure and roof lithology are the main influencing factors of gas occurrence in 11-2 coal seam. With the coal seam thickness increasing, gas content rises, and the inhomogeneous distribution of tectonic soft coal induces gas outburst hazard rising to some extent. The study results provide a basic reference to prediction of coal and gas outburst in Pansan Coal Mine.

Key words:gas occurrence; gas content; gas pressure; main influencing factors; regression analysis

瓦斯是煤的形成过程中受各种地质因素综合作用的产物,其赋存规律与复杂的煤层地质条件及煤体自身的性质有着密切的关系[1]。国内外研究表明:区域地质构造、围岩透气性、埋藏深度、煤层厚度、煤体自身性质等是影响瓦斯生成、运移、赋存的几个主要因素[2-4]。运用瓦斯地质理论对瓦斯基础参数进行分析研究,理清煤层瓦斯赋存规律及其主要控制因素,对科学指导瓦斯防治、预测瓦斯突出危险性具有重要意义[5]。

1地质概况

11区域地质构造

淮南煤田位于华北板块南缘,秦岭造山带北缘,东为郯庐断裂带,北与蚌埠隆起南带相接,总体上呈东西向展布,煤田含煤地层为二叠系上、下石盒子组和山西组,且煤层赋存呈现西部浅、东部深的特征。……

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