Study on the Technique to Control Heat-harm and Utilize Geothermal Energy in Deep Mine

摘要

With the increasing of exploitation scope and intensity, the shallow resources would be exhausted in the future, as a result, the deep mining becomes the essential choice. In the deep tunnel engineering, the heat-harm of high temperature becomes one of the main barriers of deep mining, which is harmful for the deep resources mining. Taking the Zhangshuanglou Coal Mine for example, through the analysis of thermal damage feature of the Zhangshuanglou coal mine, we use the cooling technology that puts the mine discharge as the cold source to heat harm control. By disposing three main workstations, this technology can accomplish its operations and corresponding functions in different exploitation level. These functions include the extraction of the refrigerating output by refrigeration equipment, the transportation of the chilled water by closed circulation line, the decompression of the circulation line and equipment by pressure transformation machine, and the heat exchange and cooling of workplace by heat exchange between wind stream and the chilled water. Particularly, the exchanged heat source from the workplace is taken to ground heating by the circulating water which acts as a carrier. It shows that the design concept of this technology includes protecting the environment and reducing the emission of deleterious air. The results of the project illustrate that the technology to control the heat-harm is efficient. The temperature of the workplace is brought down to 26 - 29 centigrade, and is 4 - 6 centigrade lower than the original, and the relative humidity is 5%-15% lower than before. It greatly improves the working environment of the workplace where the heat-harm of high temperature and high humidity lasts for a quite long time. In addition, it extracts deep geothermal energy successful replacing ground fired boiler for heating, further reducing environmental pollution.