1 Empty field method In the process of mining, it divides the ore into two parts: mining room and pillar.
2 When returning to the mining room, the stope exists as an open field.
3 It uses the stability of the pillars and surrounding rock mass to maintain the goaf.
4 After the mining house is finished, it is necessary to return to the mining column in time and timely process the gob area. (This is timely - refers to planned handling)
In general, the return of the mining column to the goaf is carried out simultaneously. Sometimes in order to improve the mining conditions of the pillars, the mines are filled in advance and then returned to the mining column by other methods.
5 During the mining process, the stope mainly relies on the retained pillars or permanent pillars for natural support, sometimes supported by artificial pillars.
Second, the applicable conditions of the empty field mining law
(1) It is suitable for deposits where the ore and surrounding rock are stable.
(2) The goaf is allowed to have a large exposed area within a certain period of time.
Third, the classification of empty field mining law
Several methods currently used in the open field mining method are:
(1) House column method (including comprehensive method)
(2) shallow hole retention method
(3) Segmentation method
(4) Stage mining method (including various schemes for thin ore and horizontal thin ore)
(5) Other mining methods and their deformation schemes
The machine is provided with such functions as automatic lifting, mixing, lowering, etc. A bin mixer and variety mixing bin of different specifications ,it can meet the mixing requirements of different batches and diversified varieties of products. It is an ideal machine for mixing in pharmaceutical plants. It is also widely used in such industries as medicine, chemical industry, food, etc.
Features:
â—This machine is a new model that our company has extensively absorbed and digested foreign advanced technology, successfully developed in combination with national conditions. Reasonable structure, stable performance, convenient operation, no dead corners, and no exposed bolts.
â—The rotating body (mixing bin) symmetry plane is at an angle of 30°to the rotation axis. The materials in the mixing bin rotate along with the rotating body and make tangential movement along the hopper walls, producing strong turning and high-speed tangential movement and achieving the best mixing effect.
â—It adopts PLC automatic control . It is provided with the infrared safety device and the discharging butterfly valve with the misoperation preventer to ensure safe production.
â—One machine can be equipped with bins of various specifications and quantities.
â—The machine effectively controls dust pollution and cross contamination, reduces loss of materials, controls material layering, optimizes production processes.
â—Meet GMP requirements.
Working Principle:
The machine is composed of two machine bases, rotation frame, rotation system, lifting system, control system, etc. Push the mixing bin into the rotation frame and complete the positioning. Start the control system to lift the rotation frame to the mixing height and clamp it reliably. The driving system will carry out automatic mixing according to the set time, rotation speed and other data. After the mixing operation is finished, the rotation frame will stop vertically, the bin will automatically fall to the ground, the machine will stop and process data will be printed. The bin is transferred to the next procedure.
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Jiangyin Jirui Machinery Manufacturing Co,LTD , https://www.jyjiruimachine.com