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Safety is the first thing in any where and at any time. The major security topics of opencast working are blasting operation safety, the safety of mechanical operation deep water well drilling rig, the transportation safety, the safety of the electricity, slope stability safety, waterproof and drainage of security, and etc. Our company produces every kinds of mining machines, such as all kinds of crushers, conveyor Water well drilling machine, different models of screens, feeders, bill mill, and etc. If you are interested in any of them, please contact us. We will try our best to let you satisfied.Henan Daswell Machinery is a professional manufacturer of mining machine for almost 30 years in China. We are dedicated to supplying our customers with best service and products, our major products include:water well drilling rig price,mill drilling rigs,small portable stone crushers,portable water well drilling rigs for sale,If you are interested in our products, please contact us freely: sales@daswell.com Step is named according to the elevation of flat plate, for example, 100m. Steps include working platform, security platform, transportation platform, cleaning platform and etc. The ultimate slope refers to steps which are left after mining. The location of the ultimate slope is generally certain. The included angle between the ultimate slope and horizontal plane is called the ultimate slope Angle which plays an important role in the design and production of opencast working. Its size affect the production capacity of opencast working directly. Opencast working refers to be engaged in mining operations in a open space with a certain shipment of equipment. Opencast working includes artificial exploitation mechanical mining hydraulic mining and dredge mining, according to different mining tools and equipment. Mining pit portable rock crusher small portable stone crushers, steps and outdoor channel left by opencast working are totally called stopes. The workflow of opencast working includes stripping face perforation, blasting, loading, transportation. After that, ores are transported to crushing plant or mineral processing field. Rocks and soils are transported to waste-rock yard. In the working, level is one of the basic elements of the open pit. Every step is an independent unit of stripping and mining operations.