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世界地质 2024, 43(1) 118-127 DOI: ISSN: 1004-5589 CN: 22-1111/P

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	浅层测温法
	岩溶管道构造
	数值模型
	地层温度场变化
	本文作者相关文章
	邱俊豪
	张延军
	张庆2
	张通
	于子望
	PubMed
	Article by Qiu J
	Article by Zhang Y
	Article by Zhang Q
	Article by Zhang T
	Article by Yu Z

岩溶管道构造影响下浅部地层温度数值模拟研究

邱俊豪1 , 张延军1 , 张庆2 , 张通1 , 于子望1

1. 吉林大学建设工程学院, 长春 130026;

2. 中国地质调查局南京地质调查中心, 南京 210007

摘要：当含水岩溶构造体存在时, 浅部地层温度场会产生变化? 浅层测温法可以简单快速地获得浅层地温数据, 通过温度差异反演出岩溶构造的分布? 为了研究以贵州省盘州市某场地及其周围场地为对象时, 浅层测温技术探测岩溶管道构造体的可行性, 笔者采用数值模拟方法? 结果表明: 构造体不同的埋深会显著改变浅部地层的温度, 对于单个岩溶构造体 (等效直径为 0. 5 m, 水温 12 ℃ ), 可探测深度极限约为 66 m; 在管道内流体的温度为 12 ℃时, 岩溶管道构造体有效流动截面积的增大会降低浅部地层温度, 等效直径在 0. 1 ~ 1. 0 m 区间内改变时, 2. 0 m 处地层温度的变化在 0. 02 ℃ 以内, 这使得利用浅层测温法识别岩溶构造体的有效流动截面积变得困难; 流体温度在一定范围内 (12 ~ 18 ℃ ) 的变化会改变浅部地层温度, 尤其是低温流体的影响更为明显?

关键词：浅层测温法岩溶管道构造数值模型地层温度场变化

Numerical simulation study of shallow strata temperatures under the influence of karst conduit structures

QIU Junhao 1 , ZHANG Yanjun 1 , ZHANG Qing 2 , ZHANG Tong 1 , YU Ziwang 1

1. College of Construction Engineering, Jilin University, Changchun 130026, China;

2. Nanjing Geological Survey Center, China Geological Survey, Nanjing 210007, China

Abstract: When a water?bearing karst structure exists, the temperature field of shallow strata will change. The shallow temperature measurement method can quickly and easily obtain shallow geothermal data, and the distri? bution of karst structures can be inferred through temperature differences. To study the feasibility of detecting karst conduit structures using shallow temperature measurement technology in a site in Panzhou City, Guizhou Province, and its surrounding areas, the numerical simulation methods were used. The results show that different burial depths of the structure significantly change the temperatures of shallow strata. For a single karst conduit structure (with an equivalent diameter of 0. 5 m and water temperature of 12 ℃ ), the maximum detectable depth is approxi? mately 66 m. When the fluid temperature inside the conduit is 12 ℃ , an increase in the effective flow cross?sec? tional area of the karst conduit structure will lower the temperature of the shallow strata. When the equivalent diam? eter changes within the range of 0. 1 to 1. 0 m, the change in the temperature of the strata at 2. 0 m is within0. 02 ℃ , making it difficult to identify changes in the effective flow cross?sectional area of karst structures using shallow temperature measurement. The change in fluid temperatures within a certain range (12 to 18 ℃ ) will alter the temperatures of the shallow strata, especially the impact of low?temperature fluids.

Keywords: shallow temperature measurement method karst conduit structure numerical simulation strata temperature field change

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