THE EFFECT OF THE CARBON CONTENT IN STEEL ON PARAMETERS OF BORON DIFFUSION AND THICKNESS OF DIFFUSION COATING DURING BORATION

At the current level of mining intensification , various geomechanical and gas- dynamic processes occur in the massif with uneven movement of the treatment face , which have a significant impact on the gas situation of the coal mine excavation site . As a result of the impact of rock pressure on the rocks of the roof and the soil of the formation , these processes often lead to dangerous phenomena ( rock impacts , collapses , sudden emissions , etc . ) . When the roof rocks hang in the domes of the collapse zone , sufficiently large volumes of the gas mixture can accumulate . In the future , when the stress - strain state of the array changes , the accumulated gas can be squeezed out into the bottomhole space with maximum intensity . Such incidents often lead to gas contamination of existing workings , shutdowns of mining equipment , etc .To prevent the occurrence of accidents and, consequently, to increase the safety of mining operations in high-gas-bearing formations, it is an urgent task to forecast the geomechanical and gas-dynamic conditions during cleaning operations.