Characteristics, applicable conditions and classification of dry filling mining method

(1) Divide the ore into a mine room and a pillar, first pick the house, then pick the column, and pick it up in two steps. The mining room is layered and recovered from the bottom up. With the upward movement of the mining face, the goaf is filled layer by layer to maintain the surrounding rock of the upper and lower plates, and at the same time create working conditions for continued mining.

(2) The dry filling mining method uses waste rock as the filling material. The filling material is placed downhole by the main filling well, and then sent to the working surface for loading and filling work by other transportation.

(3) After the mining house is harvested to the last layer, it is necessary to carry out the top filling.

(4) The mining work of the pillars is carried out after the mining of a batch of mining houses or after one stage of mining.

(2) Applicable conditions

(1) It is applicable to ore with high mining quality and high value; (the thickness of the mining body is less than 4 meters);

(2) It is suitable for mining ore that is stable and the rock is not stable and steep to medium-thick ore; when the ore body is too thick, the filling workload is large, the filling is filled and the filling is filled in the mine. Too heavy.

(3) Lack of cheap materials for hydraulic filling;

(4) The amount of natural water in the mining is large, and it is not suitable to use the hydraulic filling method;

(5) Mines lacking water source areas are not supplied with water by the filling method.

(3) Dry filling method classification:

According to different working forms, they can be divided into three categories, namely:

(1) Upward horizontal stratified dry filling method;

(2) inclined layered dry filling method;

(3) The method of cutting the wall and filling the mining.

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