Wellbore antifreeze measures

Mines located in severe cold areas should take measures to prevent ice formation in the wellbore in winter. The wellbore antifreeze usually adopts the following air preheating method:

(1) Preheating of the hot blast stove. Used in small wind shafts away from industrial sites without concentrated heat sources. The location of the hot blast stove should be such that the air entering the wellbore is not contaminated and meets fire protection requirements.

(2) The air heater is preheated.

(3) Preheating of air temperature. Using a tunnel or mine waste rock goaf temperature, the cold air into the downhole preheated air is preheated in an economical method for the non-coal mines non-uranium.

(4) Other air preheating methods. Such as the use of air compressors and other equipment to generate heat to preheat.

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