A mine support is an artificial structure which is erected to prevent the possibility of collapse of surrounding rocks in mine workings as well as in the construction of mines, tunnels and subways and other underground objects. The structure of the support depends on the area and shape of the cross section of the mine workings, the magnitude and nature of the rock pressure, service life and other factors.
Tight metal grating ZMR.000 is designed to support the enclosing rocks of mine workings of coal mines fixed with frame, anchor and mixed supports.
The tightening is made of low-alloy thermally untreated wire with a diameter of 5.5 mm in accordance with GOST 3282 or from round wire according to TU 14-15-212-89, GOST 2590 with contact spot welding.
The tightening has rectangular cells no more than 50х50 mm along the axes of the wire. Carrying capacity not less than 20 kN / m².
Tightening weight is 17,19 kg.
Asynchronous motors of ADVR and ADVRP types are designed for operation from a 50 Hz alternating current network as a drive for various mechanisms in mines that are dangerous for the content of mine gas (methane) and (or) coal dust in accordance with the "Safety Rules for Coal Mines" NPAOP 10.1-1.01-05. Engines ADVR-M are designed for driving fans of local airing.
Type of climatic design of engines which are manufactured for the domestic market is U2, 5 and for delivery to the CIS countries - U2.5; UHL2.5 in accordance with GOST 15150.
The engines satisfy the requirements of GOST 183, GOST 22782.0, GOST 22782.5, GOST 22782.6, GOST 24719, GOST R 51330.0, GOST R 51330.1, GOST R 51330.10, GOST R 51330.20.
The motors are manufactured for voltage 1140, 660, 380 V.
Method of cooling of engines - IСА0141 according to GOST 20459.
The level of protection of motors and terminal boxes is IP54 according to GOST 17494, GOST 14254, external fan (if any) on the side of the air inlet - IP20.
The motors have thermal protection of stator windings of type TP111 in accordance with GOST 27888 and GOST 27917. The electric circuit of thermal protection is intrinsically safe according to GOST 22782.5 (ia according to GOST R 51330.10). The temperature is 160-165 ° C for the insulating class H and 140-145 ° C for the insulation class F.
Type and level of explosion protection of engines:
RV 3VIa - for deliveries to the domestic market;
РВ ЕхdіаI - for export to the CIS countries.