Sustainability evaluation model of geothermal resources in abandoned coal mine

被引：36

作者：

Guo, Pingye ^{[1
,2
]}

Zheng, Liange ^{[3
]}

Sun, Xiaoming ^{[1
]}

He, Manchao ^{[1
]}

Wang, Yanwei ^{[4
]}

Shang, Jingshi ^{[4
]}

机构：

[1] State Key Lab Geomech & Deep Underground Engn, Beijing 100083, Peoples R China

[2] China Univ Min & Technol, Sch Mech Architecture & Civil Engn, Beijing 100083, Peoples R China

[3] Lawrence Berkeley Natl Lab, Earth Sci Div, 1 Cyclotron Rd,Mail Stop 90-1116, Berkeley, CA 94709 USA

[4] China Inst Water Resources & Hydropower Res, Beijing 100038, Peoples R China

来源：

APPLIED THERMAL ENGINEERING | 2018年 / 144卷

关键词：

Geothermal energy; Abandoned mine; Stope; Sustainability; ENERGY; HEAT; FLUID; OVERBURDEN; ZONES; FLOW;

D O I：

10.1016/j.applthermaleng.2018.06.070

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The evaluation of geothermal resource is important for abandoned coal mine reservoir. In this paper, we assessed the geothermal potential of abandoned coal mines using numerical model with key parameters calculated by empirical formula. The volume and spatial distribution of fractures were calculated based on the volume of open space in the abandon mine and strength of roof rock; a 3D model was developed using the MINC method of TOUGH2 simulator. Calculation results show that the geothermal potential of abandoned mine reservoirs depends on not only the permeability of fracture but also the height of fractured zone. Because of the height of fractured zone, the abandoned mine with the strong roof has more geothermal potential than in other cases. Furthermore, sensitivity analyses of key parameters model results indicated that the heat extraction rate is closely related to not only the flow rate but also the injection temperature and lifetime.

引用

页码：804 / 811

页数：8

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