Spark-explosion-proof control systems of water dust suppressing curtains are not produced by the domestic industry. Existing semi-automatic systems such as PB-1, developed by the institute “VNIItsvetmet”, and similar to them work on the photoelectric principle, powered from the AC network ...
At the Mukulansky open pit of Tyrnyauz Mining and Metallurgical Combine bulldozers are often forced to work in dangerous areas above the excavated space and on unstable areas of rock from the shafts during their leveling. Very dangerous is the presence of people and machines on the so-called collapse prism - a part of the shaft surface, which even with a slight additional load can lose its grip on the main mass of rock of the moldboard and under the action of its own weight collapse downwards together with the bulldozer and people ...
With the increase in the specific weight of deep vertical shafts in the mining industry and the corresponding increase in the speed of movement of lifting vessels and their load capacity, conductors became subjected to dangerous shock loads associated with the interaction of the lifting vessel with the shaft reinforcement. ...
The presence of people on a cargo lifting vessel moving at high speed, especially on the skip, is prohibited by safety regulations. ...
