What Is a Hot Stick?

In the Hoh Xil region, many "iron rods" can be seen on both sides of the railway and highway. This is actually a highly efficient thermal conductivity device called a "hot rod". Hot rod is an effective measure to deal with frozen soil diseases and protect frozen soil during the operation of Qinghai-Tibet Railway. Hot rods have strong heat transfer capabilities in passive cooling systems. In the field of mine safety, hot rods are used to accelerate the heat dissipation rate of coal piles, damage the thermal storage environment, and perform deep heat transfer methods to prevent coal piles () from spontaneous combustion .

Hot rod

It is understood that the hot rod is a seamless

Chinese people s own frozen soil treatment technology, low temperature hot rod, successfully solved the problem that has been plagued by China for more than 40 years

Thawing Settlement of Frozen Subgrade in Qinghai-Tibet Railway

In order to study the cooling effect of the hot rod on the subgrade in permafrost regions, according to the design information of the subgrade of the Qinghai-Tibet Railway test section and the climatic conditions of the Qinghai-Tibet Plateau, the hot rod road bases with a distance of 3, 4, 5, and 6 m from the hot rod The temperature distribution of the temperature field along the roadbed in the horizontal direction and vertical direction of the roadbed in October of the 1st, 10th and 30th years after completion. The hot rod has a significant cooling effect on the roadbed, and the long-term operation of the hot rod can ensure the stability of the roadbed. As the distance between the hot rods increases, the overall cooling effect of the hot rods on the surrounding soil gradually weakens. The geological and climatic conditions and the type of hot rods in China have an effective cooling radius of about 2.0 m, and the reasonable distance between the hot rods should not exceed 4.0 m ^[4] .

Application of hot rod in the field of coal spontaneous combustion prevention

The problem of spontaneous combustion of ground coal piles and gangue mountains is one of the many problems encountered in the process of coal mining, storage and transportation. Hot rods have strong heat transfer capabilities in passive cooling systems. The use of hot rods to accelerate the heat dissipation rate of coal piles ^[2] , destroy the thermal storage environment, and perform deep heat transfer methods to prevent coal piles () from spontaneously burning ^{[3] ]} . The hot rod has a significant effect on suppressing the cooling process of coal spontaneous combustion. The closer the distance between the coal body and the hot rod, the more obvious the cooling effect; the cumulative heat transfer and cooling capacity of the hot rod increases with time ^[2] .