力热耦合条件下煤岩渗透率模型研究

doi:10.16265/j.cnki.issn1003-3033.2017.06.024

中国安全科学学报 ›› 2017, Vol. 27 ›› Issue (6): 139-144.doi: 10.16265/j.cnki.issn1003-3033.2017.06.024

力热耦合条件下煤岩渗透率模型研究

李波波^1,2 讲师, 杨康¹, 徐鹏³ 副教授, 许江⁴ 教授, 张敏⁴

1 贵州大学矿业学院,贵州贵阳 550025
2 贵州省非金属矿产资源综合利用重点实验室,贵州贵阳 550025
3 中国计量大学理学院,浙江杭州 310018
4 重庆大学煤矿灾害动力学与控制国家重点实验室,重庆 400044

收稿日期:2017-03-15 修回日期:2017-05-10 发布日期:2020-10-16
作者简介:李波波 (1985—),男,贵州修文人,博士,讲师,主要从事煤层气渗流、矿井灾害防治等方面的教学与研究工作。E-mail:sbobo.0822@163.com。
基金资助:
贵州省科学技术基金资助(黔科合J字[2015]2049号);贵州省科技厅、贵州大学联合资金计划项目(黔科合LH字[2014]7654);浙江省自然科学基金资助(LY16A020002);贵州大学引进人才科研基金资助(贵大人基合字(2014)57号)。

Research on model for permeability of coal under stress and temperature coupling condition

LI Bobo^1,2, YANG Kang¹, XU Peng³, XU Jiang⁴, ZHANG Min⁴

1 College of Mining,Guizhou University,Guiyang Guizhou 550025,China
2 Guizhou Key Laboratory of Comprehensive Utilization of Non-metallic Mineral Resources,Guiyang Guizhou 550025,China
3 College of Science,China Jiliang University,Hangzhou Zhejiang 310018,China
4 State Key Laboratory of Coal Mine Disaster Dynamics and Control,Chongqing University,Chongqing 400044,China

Received:2017-03-15 Revised:2017-05-10 Published:2020-10-16

摘要/Abstract

摘要： 为研究随采深增加煤岩的渗流变化趋势,利用含瓦斯煤热-流-固耦合三轴伺服渗流装置,进行不同温度下孔隙压力改变的渗流试验,建立力热耦合作用下考虑滑脱效应的煤岩渗透率模型,采用试验数据验证模型的有效性。研究结果表明:在孔隙压力增大过程中,瓦斯流量逐渐增加,随温度升高体积应变、径向应变均呈降低趋势,轴向应变呈先降低后升高趋势;随孔隙压力增大,煤岩渗透率先逐渐减小后趋于平缓,且随温度升高,煤岩渗透率呈增大趋势;考虑力热耦合作用下煤岩渗透率模型计算出的渗透率与试验所测结果吻合较好;在低孔隙压力下滑脱效应较明显,随着孔隙压力增大,滑脱效应逐渐减弱。

关键词: 煤岩, 孔隙压力, 滑脱效应, 渗透率, 力热耦合

Abstract: In order to study the variation trend in seepage of coal with increasing depth of mining,seepage experiments were carried out by using a piece of triaxial servo-controlled seepage equipment for thermo-fluid-solid coupling of coal containing methane.A permeability model considering slippage effect under the stress and temperature coupling condition was built. The model was verified by experimental data.That there is a negative correlation between the volumetric strain and the radial strain, and the axial strain show the opposite trend of decreasing and increasing with the increase of temperature,that the permeability first decreases and then tends to be gentle with the increase of pore pressure, and it shows an increasing trend with the increase of temperature. The permeability calculated by the permeability model of coal under the coupling condition between stress and thermal conforms with the experimental results,and that under the low porosity pressure, the slippage effect is more obvious, and it is weakened with the increase of pore pressure.

Key words: coal, pore pressure, slippage effect, permeability, stress and temperature coupling

中图分类号:

X936

李波波, 杨康, 徐鹏, 许江, 张敏. 力热耦合条件下煤岩渗透率模型研究[J]. 中国安全科学学报, 2017, 27(6): 139-144.

LI Bobo, YANG Kang, XU Peng, XU Jiang, ZHANG Min. Research on model for permeability of coal under stress and temperature coupling condition[J]. China Safety Science Journal, 2017, 27(6): 139-144.

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力热耦合条件下煤岩渗透率模型研究

Research on model for permeability of coal under stress and temperature coupling condition

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