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摘 要：为进一步了解新集一矿煤层孔隙结构特征，通过压汞法和低温氮等温吸附法实验手段对新集一矿主采煤层孔隙发育特征进行研究。发现新集一矿主采煤层孔隙度较比两淮矿区其他地区高。其中以8煤层 8XJ5号样为代表孔隙分布以小孔最发育，大孔较发育，中孔少见为特征和以13-1煤层13XJ10号样为代表孔隙分布以小孔最发育为特征的基质孔，孔隙之间的连通差，不利于瓦斯的抽排；以11-2煤层11XJ3号样和6-1煤层6XJ15号样为代表中孔发育，孔隙以裂隙性为主，孔隙之间的连通较好，有利于瓦斯的运移。
关键词：孔隙结构；压汞法；低温氮等温吸附
中图分类号：P618.11文献标识码：A文章编号：1672-1098(2012)01-0007-06
收稿日期：2011-12-06
基金项目：国家自然科学基金资助项目（40872103）；国家“十一•五”科技支撑计划资助项目（2007BAK28B02）
作者简介：姚晋宝（1986-），男，山西长治人，在读硕士，研究方向：矿井瓦斯地质。
Rearch on Pore Structure Features of Xinji No.1 Coal Mine
YAO Jin-bao, DENG Rong-rong, HU Bao-lin
(School of Earth Science and Enviromental Engineering， Anhui University of Science and Technology, Huainan Anhui 232001,
China)
Abstract:In order to further understand pore structure in coal seams of Xinji No.1 Coal Mine, the features of pore structure development in mayor coal seams were investigated with mercury intrusion method and cryogenic nitrogen adsorption method. It is found that porosity in the mayor coal seams of Xinji No.1 Coal Mine is bigger than in the other regions of Huainan and Huaibei Mining Areas. In sample No. 8XJ5 from coal seam No.8 micropores are the best developed, macropores well developed, and mesopores rarely developed. In sample No. 13XJ10 from coal seam No.13-1 micropores are the best developed, connection among pores is poor, which is unfavorable for gas drainage. In sample No. 11XJ3 from coal seam No. 11-2 and in sample No. 6XJ15 from coal seam No. 6-1 mesopores are well developed, in which fissures are predominated, and connection among fissures are good, which is good for gas migration.
Key words:pore structure；mercury intrusion method；cryogenic nitrogen adsorption method
新集一矿位于凤台县城西约17km处，该矿井年实际生产能力超过310万吨。新集一矿主要含煤地层为二叠系山西组及上、下石盒子组，共含煤45层，累计厚度42.53m，可采煤层11层，可采煤层厚度27.53m，矿井主采煤层为13-1煤层、11-2煤层、8煤层和6-1煤层，主采煤层分布较稳定，以中——富灰、富焦油以及中高发热量的气煤为主，次之为1／3焦煤。近年来人们已逐步认识到煤的孔隙性直接关系到煤的吸附、解吸以及瓦斯在煤中的流动性，同时也是关系到突出的重要因素。煤的孔隙结构特征不仅与孔隙中气体的赋存状态有关，而且也极大影响到孔隙与气液分子间的相互作用。因此，正确认识煤的孔隙结构特征，是研究煤储层孔隙性、空间结构、渗流特征和煤层气可采性的重要基础［1-5］。本次采用压汞法及低温液氮法进行了分析研究。
关键词：孔隙结构；压汞法；低温氮等温吸附
中图分类号：P618.11文献标识码：A文章编号：1672-1098(2012)01-0007-06
收稿日期：2011-12-06
基金项目：国家自然科学基金资助项目（40872103）；国家“十一•五”科技支撑计划资助项目（2007BAK28B02）
作者简介：姚晋宝（1986-），男，山西长治人，在读硕士，研究方向：矿井瓦斯地质。
Rearch on Pore Structure Features of Xinji No.1 Coal Mine
YAO Jin-bao, DENG Rong-rong, HU Bao-lin
(School of Earth Science and Enviromental Engineering， Anhui University of Science and Technology, Huainan Anhui 232001,
China)
Abstract:In order to further understand pore structure in coal seams of Xinji No.1 Coal Mine, the features of pore structure development in mayor coal seams were investigated with mercury intrusion method and cryogenic nitrogen adsorption method. It is found that porosity in the mayor coal seams of Xinji No.1 Coal Mine is bigger than in the other regions of Huainan and Huaibei Mining Areas. In sample No. 8XJ5 from coal seam No.8 micropores are the best developed, macropores well developed, and mesopores rarely developed. In sample No. 13XJ10 from coal seam No.13-1 micropores are the best developed, connection among pores is poor, which is unfavorable for gas drainage. In sample No. 11XJ3 from coal seam No. 11-2 and in sample No. 6XJ15 from coal seam No. 6-1 mesopores are well developed, in which fissures are predominated, and connection among fissures are good, which is good for gas migration.
Key words:pore structure；mercury intrusion method；cryogenic nitrogen adsorption method
新集一矿位于凤台县城西约17km处，该矿井年实际生产能力超过310万吨。新集一矿主要含煤地层为二叠系山西组及上、下石盒子组，共含煤45层，累计厚度42.53m，可采煤层11层，可采煤层厚度27.53m，矿井主采煤层为13-1煤层、11-2煤层、8煤层和6-1煤层，主采煤层分布较稳定，以中——富灰、富焦油以及中高发热量的气煤为主，次之为1／3焦煤。近年来人们已逐步认识到煤的孔隙性直接关系到煤的吸附、解吸以及瓦斯在煤中的流动性，同时也是关系到突出的重要因素。煤的孔隙结构特征不仅与孔隙中气体的赋存状态有关，而且也极大影响到孔隙与气液分子间的相互作用。因此，正确认识煤的孔隙结构特征，是研究煤储层孔隙性、空间结构、渗流特征和煤层气可采性的重要基础［1-5］。本次采用压汞法及低温液氮法进行了分析研究。