The warmth weakened or fractured the rock due to thermal expansion or other processes, dependant upon the form of rock and ore. Crude air flow and pumping units were being used wherever necessary. Hoisting up shafts and inclines was accomplished by using a windlass; haulage was in “vehicles” and wheelbarrows. https://deanxhnqs.blogstival.com/57933014/facts-about-central-bank-policy-revealed