Key points of safety inspection training for mine gas First, the safety inspection of gas detection and management 1. Establish a system of establishment, clarify responsibilities, improve management organization and team, and have adequate management and inspection personnel and strict management. 2,. The mine manager, technical leader, blaster, district captain, engineering and technical personnel, squad leader, and mobile electric fitter must carry portable methane detection instruments when they go down. 3. All mining face, cavern, electromechanical equipment location, and manned location should be included in the inspection scope of gas and carbon dioxide. 4. The number of inspections must comply with the regulations. Low-gas mines should be inspected at least twice per shift; high-gas mines should be inspected at least three times per shift; mines with coal and gas outburst must be inspected by special personnel and installed with methane power-off devices. 5. The concentration of carbon dioxide in the mining face should be checked at least twice per shift. 6. Gas inspectors must implement the gas inspection system and the reporting system, and carefully fill in the class manual and record board. 7. Mines with a natural fire hazard must regularly check the concentration of carbon monoxide and the change in gas temperature. 8. The gas in the wind outside the fence at the downhole stop site is checked at least once a day. The gas concentration outside the windshield is checked at least once a week. 9. The ventilation duty personnel must review the gas station report, master the gas change situation, find the problem in time, and report to the mine dispatching room. Second, the safety inspection to prevent gas accident measures 1. The mine must strengthen the management of one pass and three defenses, strengthen leadership, clarify responsibilities, improve management system, strictly manage, and effectively prevent gas accidents as the top priority of the entire management work, implement them in a hurry, strive for practical results, and resolutely eliminate gas accidents. happened. 2. Strengthen ventilation management to prevent gas accumulation. The gas is inspected strictly according to regulations. 3. When the gas or carbon dioxide concentration in the total return airway or one-wing return airway of the mine exceeds 0.75%, the cause must be ascertained and disposed of. 4. When the gas concentration in the return airway of the mining area and the return airway of the mining face exceeds 1.0% or the carbon dioxide concentration exceeds 1.5%, the work must be stopped, the personnel should be withdrawn, and measures should be taken for treatment. 5. When the gas concentration in the airflow of the mining face and other working sites reaches 1.0%, it is necessary to stop using the electric coal drill to drill the eye; when the gas in the wind flow reaches 1.0% within 20m near the blasting site, blasting is strictly prohibited. When the gas concentration in the mining working face and other working places is less than 20% within 20m near the motor and its switch, the work must be stopped, the power supply must be cut off, and the personnel should be evacuated for disposal. At the vicinity of 20m near the local gas accumulation site, work must be stopped, the power supply must be cut off, and personnel should be evacuated for disposal. For electrical equipment that has been de-energized due to over-limits, the gas concentration must be reduced to 1.0% or less before it can be energized. 6. When the concentration of carbon dioxide reaches 1.5%, work must be stopped, personnel should be withdrawn, the cause should be identified, and measures should be taken to deal with it. 7. Mines must take measures from production management to prevent gas accumulation. 8. It is strictly forbidden to work in areas where wind or gas is out of limits. 9. Explosion-proof measures should be installed in the coal mining face of high gas mine. 10. Eliminate the ignition of the fire source and eliminate the explosion of electrical equipment. 11. Strengthen the management of belt conveyors and complete protection. 12, the hydraulic coupler should use a flame retardant, and keep the fusible plug good and effective. 13. The power supply system insists on the use of power-off protection. All cables are not allowed to be mopped. There is no sheep tail or clear joint on the cable. 14. Strengthen the management of the goaf and close it in time to prevent air leakage to the goaf. 15. Strengthen blasting management to prevent the firing of gas. 16. It is strictly forbidden to open the miner's lamp underground. It is strictly forbidden to move electrical equipment with electricity. Expanded metal - Light and Small Meshes
From border fencing to rail yards and logistics depots, expanded metal is the product of choice for today`s more robust security requirements. It is impossible to scale, can not be easily cut, and has superior impact and tensile strength. See large and heavy mesh tables for options and available gauges.
Standard Expanded Metal,Expanded Metal Mesh,Standard Expanded Metal Mesh,Expanded Metal Grating Hebei Fangyu Trade Co., Ltd. , https://www.laderytrading.com
Light and small meshes are used in applications such as air filtration, ceiling panels, and machine guards. Small mesh is typically 3/16" to ½" SWD pattern. Available materials include cold rolled steel, galvanized steel, stainless, aluminum, and copper.
Expanded metal - INTERMEDIATE MESH
Intermediate patterns are used for applications such as lockers, chimney caps, vents, patio furniture and grilles. Typical patterns include ½" to ¾" SWD. Available materials include cold rolled steel, galvanized steel, stainless, aluminum, and copper..
EXPANDED METAL - LARGE, HEAVY & GRATING MESHES
Large and heavy patterns are used in applications such as park and recreation, security fencing, machine guards, shelving, cat walks, and automotive racks. Typical patterns include ¾" to 1 ½" and larger. Available materials include cold rolled steel, galvanized steel, stainless, aluminum, and copper.
The LEVELMASTER: Our flattening and leveling line produces the finest stainless, carbon, and aluminum expanded metal in the industry. Flattened grating produced on the LevelMaster is a Metalex exclusive!
EXPANDED METAL - Micro Mesh
Expanded metals are being put to new uses in highly technical products. We are developing smaller and more perfect patterns to meet the demands of industry for tighter and more precise specifications for diamond pattern, thickness, hole size and workability.
Micromesh provides superior heat transfer characteristics. It can be made acoustically neutral for applications such as dent guards in audio speakers. It can be flattened to reduce thickness and provide a smoother surface; made non-nesting to allow wrapping on itself without losing air flow capability; annealed for improved formability; and coated with either metallic or organic compounds.
Micromesh is manufactured from carbon steel, stainless steel, copper and aluminum.
Expanded metal - Barrier Mesh / security mesh
Barrier mesh protects against break-ins and break-outs. It safeguards walls and ceilings in homes, apartments, offices, stores, storage areas and correctional facilities.
EXPANDED METAL - Security Fencing
