采空区高温点液态CO2处理后瓦斯解吸能量变化特性

doi:10.16265/j.cnki.issn1003-3033.2024.11.0678

中国安全科学学报 ›› 2024, Vol. 34 ›› Issue (11): 73-80.doi: 10.16265/j.cnki.issn1003-3033.2024.11.0678

采空区高温点液态CO₂处理后瓦斯解吸能量变化特性

鲁义¹(), 颜晴琼¹, 王俏¹, 丁仰卫², 史正景³, 谷旺鑫¹

¹ 湖南科技大学资源环境与安全工程学院,湖南湘潭 411201
² 山东鲁泰控股集团有限公司鹿洼煤矿,山东济宁 272004
³ 中煤新集能源股份有限公司技术中心,安徽淮南 232000

收稿日期:2024-06-09 修回日期:2024-08-14 出版日期:2024-11-28
作者简介:
鲁义(1986—),男,江西新干人,博士,教授,博士生导师,主要从事火灾科学与技术方面的研究。E-mail:luyijx@163.com。
王俏, 讲师
基金资助:
国家自然科学基金(52174180); 湖南省杰出青年科学基金(2022JJ10026); 国家重大人才工程青年项目(2022QB06801)

Characteristics of gas desorption energy change after liquid CO₂treatment at high temperature point in goaf

LU Yi¹(), YAN Qingqiong¹, WANG Qiao¹, DING Yangwei², SHI Zhengjing³, GU Wangxin¹

¹ School of Resource & Environment and Safety Engineering, Hunan University of Science and Technology, Xiangtan Hunan 411100, China
² Luwa Coal Mine, Shangdong Lutai Hold Group Co., Ltd., Jining Shandong 272004, China
³ Technical Center,China Coal Xinji Energy Co., Ltd., Huainan Anhui 232000, China

Received:2024-06-09 Revised:2024-08-14 Published:2024-11-28

摘要/Abstract

摘要：

为研究在高瓦斯易自燃煤层采空区内注入液态CO₂后,其对抑制煤自燃产热和瓦斯释放的效果,利用自制的变温腔体、解吸仪器等装置组成瓦斯解吸测试系统,模拟液态CO₂注入采空区高温点后对煤样温度和煤瓦斯解吸量的影响,分析降-升温变化过程中煤样在相应煤体瓦斯压力及不同温度下的瓦斯解吸能量变化特性。结果表明:煤样在注入液态CO₂后的60~100 min内温度会降至稳定,瓦斯也停止解吸;100 min后冷量逐渐耗尽,煤继续氧化升温,煤瓦斯也恢复解吸,且解吸量以较快速度上升;液态CO₂气化释放的冷量和CO₂气体对煤体降温和瓦斯解吸具有良好抑制作用;当煤样温度处于10~30 ℃时,煤呈现低能量状态,且在该温度区间内进行解吸,煤内部更易使吸附热值趋向于平衡,煤体表面自由能降低值也会呈现平稳态势。

关键词: 采空区, 高温点, 液态CO₂, 瓦斯解吸, 吸附热, 表面自由能

Abstract:

In order to study the effect of liquid CO₂ injection on coal spontaneous combustion heat production and gas release in the gob with high gas content and easy spontaneous combustion, the gas desorption test system was composed of a self-made variable temperature chamber and desorption instrument to simulate the influence of liquid CO₂ injected into a high-temperature point of gob on coal sample temperature and coal gas desorption amount and analyze the change of gas desorption energy of coal sample under corresponding coal body gas pressure and different temperature during the process of "falling to rising" temperature change. The results show that the temperature of the coal sample will stabilize at a lower level, and the gas will stop desorbing within 60 minutes to 100 minutes after the liquid CO₂ is injected. After 100 minutes, the cold energy gradually runs out, and the coal continues to oxidize and heat up, and the gas resumes desorbing with an increasing desorption rate. The cold energy released by the liquefied CO₂ gasification and the CO₂ gas has an excellent inhibitory effect on reducing coal temperature and gas desorption. When the coal sample temperature is between 10 and 30 ℃, the coal is in a low energy state. In this temperature range, the internal coal is more likely to cause the adsorption heat value to stabilize. The decrease in the surface free energy of the coal body will also present a stable trend.

Key words: goaf, high temperature point, liquid CO₂, gas desorption, heat of adsorption, surface free energy

中图分类号:

X936
TD752.2

鲁义, 颜晴琼, 王俏, 丁仰卫, 史正景, 谷旺鑫. 采空区高温点液态CO₂处理后瓦斯解吸能量变化特性[J]. 中国安全科学学报, 2024, 34(11): 73-80.

LU Yi, YAN Qingqiong, WANG Qiao, DING Yangwei, SHI Zhengjing, GU Wangxin. Characteristics of gas desorption energy change after liquid CO₂treatment at high temperature point in goaf[J]. China Safety Science Journal, 2024, 34(11): 73-80.

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参考文献 14

[1]	CHEN Jian, LU Yi, TANG Guoxin, et al. Research and prevention of upper remaining coal spontaneous combustion induced by air leakage in multi-inclination regenerated roof: a case study in the Luwa coal mine, China[J]. Energy, 2023, 275: DOI:10.1016/j.energy.2023.127484.
[2]	李志勇, 刘星乐, 辛民, 等. 综放工作面煤自燃的特征温度点分析及影响规律实验研究[J]. 煤矿现代化, 2023, 32(1):49-53.
	LI Zhiyong, LIU Xingle, XIN Min, et al. Characteristic temperature point analysis and experimental study on influence law of coal spontaneous combustion in fully mechanized top coal caving face[J]. Coal Mine Modernization, 2023, 32(1):49-53.
[3]	林柏泉, 李庆钊, 周延. 煤矿采空区瓦斯与煤自燃复合热动力灾害多场演化研究进展[J]. 煤炭学报, 2021, 46(6):1 715-1 726.
	LIN Baiquan, LI Qingzhao, ZHOU Yan. Research advances about multi-field evolution of coupled thermodynamic disasters in coal mine goaf[J]. Journal of China Coal Society, 2021, 46(6):1 715-1 726.
[4]	张巨峰, 施式亮, 鲁义, 等. 矿井瓦斯与煤自燃共生灾害:耦合关系、致灾机制、防控技术[J]. 中国安全科学学报, 2020, 30(10):149-155. doi: 10.16265/j.cnki.issn 1003-3033.2020.10.021
	ZHANG Jufeng, SHI Shiliang, LU Yi, et al. Symbiotic disasters of mine gas and coal spontaneous combustion:coupling relationship, disaster mechanism, prevention and control technology[J]. China Safety Science Journal, 2020, 30(10):149-155. doi: 10.16265/j.cnki.issn 1003-3033.2020.10.021
[5]	LU Yi. Laboratory study on the rising temperature of spontaneous combustion in coal stockpiles and a paste foam suppression technique[J]. Energy & Fuels, 2017, 31(7):7 290-7 298.
[6]	LI Manhou, XU Jingchao, WANG Changjian, et al. Thermal and kinetics mechanism of explosion mitigation of methane-air mixture by N₂/CO₂ in a closed compartment[J]. Fuel, 2019, 255: DOI:10.1016/j.fuel.2019.115747.
[7]	SHAO Zhuangzhuang, TAN Bo, LI Tianze, et al. Study on oxidation and pyrolysis characteristics of lignite damaged by liquid CO₂ at low-temperature[J]. Fuel, 2022, 323: DOI:10.1016/j.fuel.2022.124371.
[8]	CAO Naifu, LIANG Yuntao. Mechanism of fire prevention with liquid carbon dioxide and application of long-distance pressure-holding transportation technology based on shallow buried and near-horizontal goaf geological conditions[J]. Journal of Chemistry, 2021, 2021(1): DOI:10.1155/2021/5572963.
[9]	BENEDTTO A, SARLI V, SALZANO E, et al. Explosion behavior of CH₄/O₂/N₂/CO₂ and H₂/O₂/N₂/CO₂ mixtures[J]. International Journal of Hydrogen Energy, 2009, 34(16): 6 970-6 978.
[10]	RAMIREA-PASTOR A J, BULNES F. Differential heat of adsorption in the presence of an order-disorder phase transition[J]. Physica A, 2000, 283(1/2): 198-203.
[11]	ZHOU Li, ZHOU Yaping. Determination of compressibility factor and fugacity coefficient of hydrogen in studies of adsorptive storage[J]. International Journal of Hydrogen Energy, 2001, 26: 597-601.
[12]	马东民, 王传涛, 杨甫, 等. 大佛寺煤储层甲烷解吸的传质过程研究[J]. 煤炭学报, 2018, 43(增1):219-228.
	MA Dongmin, WANG Chuantao, YANG Fu, et al. Mass transfer process of desorption of CBM in Dafosi coal reservoir[J]. Journal of China Coal Society, 2018, 43(S1):219-228.
[13]	刘珊珊, 孟召平. 等温吸附过程中不同煤体结构煤能量变化规律[J]. 煤炭学报, 2015, 40(6): 1 422-1 427.
	LIU Shanshan, MENG Zhaoping. Study on energy variation of different coal-body structure coals in the process of isothermal adsorption[J]. Journal of China Coal Society, 2015, 40(6): 1 422-1 427.
[14]	邓军, 习红军, 翟小伟, 等. 煤矿采空区液态CO₂灌注防灭火关键参数研究[J]. 西安科技大学学报, 2017, 37(5):605-609.
	DENG Jun, XI Hongjun, ZHAI Xiaowei, et al. Key parameters of liquid CO₂perfusion for fire control in coal mine goaf[J]. Journal of Xi'an University of Science and Technology, 2017, 37(5):605-609.

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采空区高温点液态CO₂处理后瓦斯解吸能量变化特性

Characteristics of gas desorption energy change after liquid CO₂treatment at high temperature point in goaf

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