| 低温氮吸附法判识构造煤的实验研究 |
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| 引用本文： | 李建楼.低温氮吸附法判识构造煤的实验研究[J].地质与勘探,2020,56(4):838-844. |
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| 作者姓名： | 李建楼 |
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| 作者单位： | 宿州学院资源与土木工程学院，安徽宿州； 安徽省煤矿勘探工程技术研究中心，安徽宿州； 国家煤矿水害防治工程技术研究中心，安徽宿州; 淮北矿业股份有限公司桃园煤矿地测科，安徽宿州 |
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| 基金项目： | 国家自然科学基金项目（编号 41502057）、安徽省煤矿勘探工程技术研究中心平台项目（编号 2014YKF02）和宿州学院博士科研启动基金（编号 2011jb05）联合资助 |
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| 摘 要： | 煤体结构是煤与瓦斯突出防治和煤与瓦斯共采的重要地质因素之一。为了区分煤体结构在地应力作用下的破坏程度,采集了淮北矿业股份有限公司桃园煤矿8283采煤工作面煤样,基于自相似原理和实验室内对煤样的加压模拟实验,通过煤基质纳米级孔隙在低温氮吸附-解吸曲线上的响应对比分析,建立了低温氮吸附法判识煤体结构的方法,并对淮北矿业股份有限公司桃园煤矿10号煤层内1026和1035工作面煤体宏观结构及微观孔隙发育特征进行了对比研究。结果表明,煤体微观孔隙结构变化与构造煤发育程度密切相关;随着煤体破坏程度的提高,在吸附-解吸曲线上表现为吸附量明显增大,纳米级孔隙的比表面积和比孔容明显增加,平均孔径略有增加;构造煤解吸曲线上有明显的陡降点,而原生结构煤的解吸曲线不具有这个特征。
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| 关 键 词： | 构造煤 低温氮吸附 纳米级孔隙 |
| 收稿时间： | 2019/6/13 0:00:00 |
| 修稿时间： | 2020/4/12 0:00:00 |
Experimental study on identification of structural coal using the low-temperature nitrogen adsorption method |
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| Li Jianlou.Experimental study on identification of structural coal using the low-temperature nitrogen adsorption method[J].Geology and Prospecting,2020,56(4):838-844. |
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| Authors: | Li Jianlou |
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| Abstract: | Coal structure is one of the important geological factors for coal and gas co-mining and prevention of coal-gas outburst. In order to distinguish the damage degree of coal structure under the action of in-situ stress, coal samples were collected from the 8283 working face of the Taoyuan Coal Mine, Huaibei Mining Co., LTD. Based on the principle of self-similarity and the simulation experiment of pressurizing coal samples in the laboratory, a low-temperature nitrogen adsorption method is established to determine the structure of the coal body through the comparative analysis of the response of nanoscale pores of coal matrix in the low-temperature nitrogen sorption-desorption curve, and the macro structure and micro pore development characteristics of 1026 and 1035 working faces in No. 10 coal seam of the Taoyuan coal mine of Huaibei mining Co., LTD. The results show that the change of micro pore structure in the coal body is closely related to the development degree of structural coal. With the increase of the destruction degree of the coal body, the adsorption capacity increases significantly in the adsorption - desorption curve, the specific surface area and specific pore volume of nanoscale pores increase significantly, and the average pore diameter increases slightly. The curve of structural coal desorption has an obvious steep drop point, while the primary structural coal desorption curve does not have this characteristic. |
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| Keywords: | structural coal low temperature nitrogen adsorption nanoscale pore |
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