Study On Inflow Temperature Change Of Intake Shaft According To Liangbei Coal Mine Xinlong Coal Xuchang Henan

With the further development of the mine, as well as the enhancement of the mechanized degree, the hot evil problem of the mine becomes more and more serious. The ventilation has a limited effect on the temperature decrease of the mine, especially the deep mine with a high temperature. Thus it needs to adjust the hot environment of the mine by using the mine air conditioning. The forecast of the airflow temperature is the premise and the guarantee of designing the air-conditioning system in the mine, and it relates to the scientific nature and the efficiency of the design of the air-conditioning system used in the mine. And the intake shift is the beginning of the hot environment of the entire mine. It plays a pivotal role in the forecast of the hot environment of the whole mine.In this article we divide an intake shift into two parts by the permanent temperate zone. The first part is from the earth surface to the permanent temperate zone, while from the permanent temperate zone to the bottom of the well is the second part. According to the measured data, we make the first part an equation of motion formula; we divide the second part of the well chamber into certain sections with each section approximately a hundred meter, and then use the method of difference to carry on the relay computation from the permanent temperate zone to the bottom of the well. In this way we can combine the returning analytic method and the method of difference effectively, and can make up for the deficiency caused by using only one method. It is a new practical method to study the law of the airflow temperature change in an intake shift. It has been proved by the resolving computation that this method conforms to the project precision although the computed result shows a relative error limit in a slightly big degree. And it further proves the method combining the returning analytic method and the method of difference has its existent value. It can be used to forecast the law of the airflow temperature change in an intake shift, and can provide the basic data in theory for the forecast of the hot environment in the entire mine.