With the advancement of the mining face, the mining method of filling the goaf is gradually filled with filler. Sometimes the bracket is used in conjunction with the filling to maintain the gob. The purpose of filling the goaf is mainly to use the built-in filling body for ground pressure management to control the surrounding rock caving and surface subsidence, and to create safe and convenient conditions for mining. Sometimes used to prevent internal fires from spontaneous combustion ore. According to the structure of the nugget and the direction of the mining face, it can be divided into a single-layer filling mining method, an upward stratified filling mining method, a downward stratified filling mining method and a mining mining method. According to the different filling and output methods, it can be divided into dry filling mining method, hydraulic filling mining method and cement filling mining method. (1) Single-layer filling mining method. It is suitable for use in gently inclined thin ore bodies. The wall-type mining face with the full length of the ore block is once-collected according to the full thickness of the ore body along the direction of the strike, and the goaf is planned to be filled with water or cement with the advancement of the working face to control roof. (2) Upward horizontal stratification filling mining method. Generally, the ore block is divided into a mine house and a pillar, the first step is to return to the mining room, and the second step is to return to the mining column. When returning to the mining room, it will be leveled from bottom to top. As the work advances upwards, the goaf will be filled layer by layer, and the working space for continuous mining will be set aside. The filling body maintains the two sides of the surrounding rock and serves as a working platform for the upper mining. The caving ore falls on the surface of the filling body and the ore is mechanically transported into the chute. When the mine frame is taken to the top layer, the roof is filled. The pillars are collected after a number of mines have been harvested or at all stages. The filling method of the mining frame can be filled by dry filling, hydraulic filling or cementing. (3) Upward inclined stratified filling mining method. The difference between this method and the upward horizontal stratification filling method is that the stratified mining is carried out by inclined stratification, and the transportation of ore and filling in the stope mainly depends on gravity. This method can only be used for dry filling. (4) Downward stratification filling mining method. Very stable for mining ore or ore and surrounding rock are very stable, high ore grade or high-value non-ferrous metals or precious metals ore body. The essence of this mining method is: stratification and top-by-layer filling from top to bottom, and each layer of mining is carried out under the protection of the previous layer of artificial false roof. The level of delamination is at or between 4° and 10° or 10° to 15°. The sloping stratification is mainly for filling the direct top, and is also advantageous for ore handling, but the rock drilling and support operations are not as convenient as horizontal stratification. (5) Mining and filling mining method. When the thickness of the vein is less than 0.3-0.4 m, only the miners cannot work in it. The ore and surrounding rock must be returned separately, so that the goaf can reach the minimum allowable thickness (0.8-0.9 m) and the ore can be transported. At the exit site, the excavated surrounding rock fills the goaf to create conditions for continued mining. This mining method is a mining method. (6) Box bracket filling mining method. In the past, mining thin veins used cross-strut or wooden shed support mining methods. Under the conditions of large ore body thickness, extremely unstable ore and surrounding rock, extremely complex ore body shape, and expensive ore, this mining method is still a kind of mining method. Effective mining methods. Gym Spin Bike,Used Spin Bikes,Spin Cycle Bike,Spinner Spin Bike ZHEJIANG POWERTECH CO,.LTD , https://www.chinatattoo-supplies.com