What are the requirements for the required air volume in the underground working face?
The minimum wind speed of the 1 ç¡ chamber type stope shall not be less than 0.15m/s;
2 roadway type stope should not be less than 0.25m/s;
3 The electric ramp and the secondary crushing roadway shall not be less than 0.5m/s;
4 The working surface of the trackless loading equipment shall not be less than 0.4m/s.
2. The calculation of the required air volume for the standby working surface shall comply with the following provisions:
1 The spare working face that is difficult to be sealed shall be the same as the required air volume of the mining face;
2 The spare working face that can be temporarily sealed should be calculated according to 1/2 of the required air volume of the working face .
3. The calculation of the required air volume for the driving face should meet the following requirements:
1 When calculating according to the dust removal wind speed, the wind speed of the roadway should not be less than 0.25m/s ;
2 The required air volume for digging the working face can be selected according to Table 1 .
4. The calculation of the required air volume for an independent ventilation chamber shall comply with the following provisions:
1 The working space of the underground explosives warehouse, the broken chamber, the main shaft discharge chamber, and the bucket loading chamber shall be calculated separately;
2 The diverticulum with large heat dissipation of electromechanical equipment shall be calculated according to the calorific value of the operation of electromechanical equipment;
3 The charging chamber should be calculated according to the hydrogen concentration in the return air stream being less than 0.5 %.
LED underwater light, is mounted on the bottom, a simple means is installed under the bottom of the lamp, small and exquisite, elegant appearance, appearance is similar to some buried lights, more than just a installation chassis, the chassis is screwed.
Because LED underwater light is used below the bottom, need to absorb a certain amount of pressure, so usually adopt stainless steel material, 8-10 mm toughened glass, high quality waterproof connector, silicon rubber sealing ring, arc angles of refraction strengthened glass, waterproof, dustproof, prevent leakage and corrosion.
LED underwater light for LED light source, commonly known as the fourth generation of lighting source or green light source, energy saving, environmental protection, long life, small volume, etc.Electricity, it can send out a variety of colors, colorful, usually in a park or fountain pool.
Led Underwater Light,Waterproof Led Underwater Light,Led Mini Underwater Pool Light,Mini Led Underwater Light
NINGBO ZHENHAI BOLANG METAL PRODUCT FACTORY , https://www.diecastingdie.com