Including: 1 pouring and releasing wells (or raising the wells); 2 raising the pedestrian draining wells; 3 erecting the partition wall formwork and pouring the concrete partition wall. 4 Comprehensive inspection before filling. After inspection, the required filling pipe, launder board, etc. can be placed from the patio to the stope. (The winch of 0.5 to 2.0 tons on the patio can meet the requirements).
1) Pouring flow mine:
The inner diameter of the flow well is generally 1.5 to 2.0 meters. The reinforced concrete beam casting method is often used. According to the height of the stage, the thickness of the well is 0.5 to 1.0 meters. (Use 0.4 to 0.5 m thick). When the height of the stage increases, Bi Hou will add up to 0.8 to 1.0 m. (Therefore, the amount of mine passing through the well is large).
Some mines are welded with steel plates into the early days of the wells. A section is spliced ​​together. (Such as home gold mine in Shandong sets, etc.) This form is also very good.
2) Heightening dehydration patio
The pedestrian dewatering well generally adopts a square section with a specification of 1.5×1.5 m 2 . It is a stepped patio made of concrete prefabricated pieces.
The net section of the pedestrian drainage well of the Tonglushan Copper Mine is 1.8×1.8 m2 , which consists of a wooden formwork of 3 mm. The gap between the precast blocks of the concrete is 0.2-0.3 m, and the grass is blocked at the drain hole. bag.
3) Pouring partition wall
The template for casting the partition wall used to be made of wood. The existing concrete precast block has a prefabricated size of 300×200×150 mm, and the total thickness of the partition wall is 0.8 m (precast block thickness is 0.3 m, inner pouring is 0.5 m thick). Concrete). When casting the partition wall, the hollowness is good, and the upper and lower layers are squeezed. Therefore, during the construction, after each layered partition wall is built, a steel bar is inserted at intervals of about 1.0 m, and the upper surface is exposed by about 0.5 m. It can play a good role in the upper and lower layers of the squeeze and connection.
(2) officially filling the stope
After the preparation work is completed, the formal stop filling work can be carried out.
Filling sand can be used for filling materials, smelting furnaces, etc. (The copper mine in the Tonglu Mountain Mine, the tailings in the Hongtoushan Mine). In the case of a furnace, the conveying was carried out along the tube along the side of the tube of 100 mm.
After the filling of the stope is completed, a layer of 0.15 m thick concrete is laid on the filling material as a bottom plate. Make it easy to mine and reduce poverty. Since the water permeability of the furnace is good, when the filling is completed, the bottom plate can be laid. After the bottom plate is poured, it takes one day to maintain the rock drilling work in the next cycle. After 2-3 days of health maintenance, the mine can be collapsed.
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