摘要
在煤岩注热水过程中,煤岩注热水存在现场不稳定和注热效果不佳的问题,其根本原因是流体在煤层中运移包含多个理论学科交叉的复杂性问题,造成了含不同孔裂隙类型煤岩注热水增采瓦斯技术应用效果差异大的瓶颈。因此,为了提高注水工艺,优化注水参数。本文拟综合运用CT扫描、热流固耦合机理等领域相关理论和技术,采用数值模拟的方法,分析煤岩注热水后煤岩温度分布规律、流体运移规律。最后得出结论:煤中孔裂隙结构对水的迁移和流体在煤中传热影响重大,尤其是在狭窄的喉道处,其结构加速水的运移,随着注热时间的持续,煤岩表面温度以注热孔为中心呈环状分布。
Coal During the process of hot water injection into coal and rock,there are problems such as on-site instability and poor heat injection effect.The fundamental reason is that the migration of fluid in coal seams involves the complexity of multiple theoretical disciplines,which has caused a bottleneck where the application effect of hot water injection for gas extraction in coal and rock with different types of pores and fissures varies greatly.Therefore,in order to improve the water injection process and optimize the water injection parameters.This project intends to comprehensively apply relevant theories and technologies from fields such as CT scanning and the mechanism of thermofluidsolid interaction,and adopt numerical simulation methods to study the temperature distribution law and fluid migration law of coal and rock after hot water injection.Finally,it is concluded that the pore and fissure structure in coal has a significant impact on the migration of water and the heat transfer of fluid in coal,especially at the narrow throat,where the structure accelerates the migration of water.With the continuation of the heat injection time,the surface temperature of the coal rock is distributed in a ring pattern centered on the heat injection holes.
作者
周亮
王福生
ZHOU Liang;WANG Fusheng(School of Emergency Management and Safety Engineering,North China University of Science and Technology,Tangshan Hebei 063210,China;Key Laboratory of Mine Development and Safety Technology of Hebei Province,Tangshan Hebei 063210,China)
出处
《华北理工大学学报(自然科学版)》
2025年第4期87-95,124,共10页
Journal of North China University of Science and Technology(Natural Science Edition)
基金
教育部“春晖计划”国际合作项目(HZKY20220236)。
关键词
煤岩注水传热
孔裂隙渗流
两相流
热流固
coal rock water injection heat transfer
Pore and fissure seepage
Two-phase flow
Hot fluid solidification
