The main accidents in open pit mines include:

Side slope landslides, transport vehicle accidents, mechanical accidents, lifting injuries, electric shocks, water hazards, fires, high-altitude falls, blasting accidents, boiler and pressure vessel explosions, poisoning and suffocation.

Accident prevention measures are:

(1) Before the commencement of the open-face mining and stripping work, the operating procedures must be prepared and implemented after being approved by the person in charge of the mining enterprise. In open-pit mining, the height, width and slope angle of the stripping face must be controlled as specified in the design.

(2) The mining area must establish a ground waterproofing and drainage system to prevent surface water from leaking into the open pit; prevent flash floods from destroying production, transportation systems, and structures; and prevent mudslides from dumping in the quarry (waste) quarry tailings; The landslide and the slope slide down.

(3) Execution of the Ground Fire Fire Protection Law of mining enterprises.

(4) The production, storage, transportation, testing, destruction and blasting operations of the blasting materials of mining enterprises shall be carried out in strict accordance with the regulations of the People's Republic of China on the management of civil explosives and the provisions of the blasting safety regulations.

(5) The design, installation, acceptance, operation, maintenance and other work of the mine power system must be carried out in accordance with relevant state regulations.

(6) open pit mine railway, motor transport must be managed in accordance with relevant state regulations.

(7) Mine mining, loading equipment , boilers and pressure vessels, lifting equipment, etc. are used and managed according to the operating procedures of the equipment.

(8) Regularly carry out various indicators on the environment of the mine, and promptly find problems and deal with them in time.

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The main advantages of vacuum blister packaging are that it saves raw and auxiliary materials, light weight, convenient transportation, good sealing performance, and meets the requirements of environmental protection and green packaging; it can pack any special-shaped products, and no additional buffer materials are required for packing; the packaged products are transparent and visible , beautiful appearance, easy to sell, and suitable for mechanized and automated packaging, convenient for modern management, saving manpower and improving efficiency.

Vacuum blister packaging is carried out on special packaging machinery. In recent years, with the development of mechanization and automation of commodity packaging, manufacturers of thermoforming packaging machinery have developed rapidly. There are many professional production of vacuum blister packaging at home and abroad. Manufacturer of equipment. Although the structure of the blister packaging machine is different, its principle is basically similar. The working principle of vacuum blister packaging is: after the blister sheet is heated by the oven of the blister machine, due to the principle of thermal expansion and contraction, the sheet begins to soften and become larger. It is then vacuum formed on a specific copper or aluminum mold. According to different product requirements, the formed blister is punched and cut.

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