(1) The overburden or the surface is not allowed to collapse; (2) Mining precious ore or high, it is required to increase the recovery rate of the mast; (3) Existing filling systems, filling equipment or ready-made filling materials can be utilized; (4) Deep mining, if the ground pressure is large, there is a filling body with sufficient strength to alleviate the stress concentration of adjacent unmined columns. Filling goafs and filling mining methods have different requirements in the filling process. It is not filled with mining, but it is filled once after the mining house is finished. Therefore, the filling efficiency is high. Before filling, it is necessary to firmly seal all the roadways or exits leading to the empty area. If it is filled with water, it should be provided with water filtration structure or overflow dewatering. In the case of dry filling, the upper part is not full and the filling is not dense; when the cementing is filled, the segregation phenomenon of the filling material is serious.
Construction Hoist (also called Building Hoist, Passenger Hoist, Construction Material Hoist, Construction Passenger Hoist) are an efficient and safe means of transporting people and materials on construction site. They help increase productivity and safety, thereby saving time and money.
Construction hoist is vertical transport machinery driving by pinion and rack, mainly used on construction site for transportation of personal and materials. As a permanent or sub-permanent external elevator, it also applies to store house, dock, high tower, high chimney, etc. There are single cage and double cages hoist. According to the need gets rid of one cage of double cages the hoist will be changed to single cage hoist. SC construction hoist is equipped with reliable electrical and mechanical safety device. It is efficient and safety vertical transporting equipment.
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Application conditions for filling goaf
The filling method treats the goaf and applies to the following conditions: