The coal mining process achieves unmanned mining. Workers can operate coal-electric equipment at locations other than the working face to complete the processes of coal breaking, coal loading, and coal transportation, freeing workers from heavy physical labor and harsh thin coal mining environments. The process also allows the extraction of very thin coal seams that are difficult to mine or that are impossible to mine, improving resource utilization and mine service life. The rig uses a local ventilator to supply air to the head, dust-proof pipes and spray nozzles to the head, using a non-sparking drill bit, installing a gas-breaking sensor in the head-drill pipe, and setting up external spray and other safety measures at the opening of the hole to avoid gas. Coal dust explosion. From the application situation of the first equipment, the unit has a width of 2.1m, a depth of up to 85m, a coal seam thickness of 1m, a coal pillar width of 0.7m between the drilling and mining holes, and a recovery rate of 90% of the raw coal. The whole coal mining process is calculated. The recovery rate is 67.5%, which is about 17% higher than the ordinary mining process.
Bicycle spare parts are mainly sorted as frame, Wheel Set, crankset
and pedal. The Electric Bike Hub suitable for
electric mountain bikes or city bikes, to assists in slowing down quickly and
safely while driving. E-Bike Hubs usually be
disc brake type, better for mountain bikes than the V-brakes type. This Electric Wheel Hub material is hub body made by aluminum
alloy and taki made by chromium-molybdenum steel to ensure strength, 120 crisp
ringing sounds around you when you riding. The front Ebike
Hub have different O.L.D. specification and axle diameter to use on
bikes.
E-Bike Hubs,Electric Bike Hub,Electric Wheel Hub,Ebike Hub Suzhou Jingqiyao Intelligent Technology Co., Ltd. , https://www.polsobike.com
Shandong Xinwen Mining Group Company introduced from abroad auger mining coal new technology, to fill the domestic coal mining technology gap has opened up a new way of domestic thin coal seams and thin seam mining. From the first two batches of equipment introduced in the two mines, the equipment is operating normally and the economic benefits are obvious.