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 share of deep vertical mine shafts in the mining industry and the corresponding increase in the speed of hoisting vessels and their load capacity, guides began to be subjected to dangerous impact loads associated with the interaction of the hoisting vessel with the shaft reinforcement. ...

The presence of people on a cargo **hoisting** vessel moving at high speed, especially on **the** skip, is prohibited by safety regulations. **A** circuit for automatically switching the measuring and recording equipment on and off based on magnetically controlled contacts has been developed at the Gipronickel Institute.