Nugget structure parameters of stage mining method

When the horizontal deep hole stage mining method is adopted, the structural parameters of the ore block are: the stage height is 60-80 m; the length of the mine house arranged by the rock strike is 20-50 m; the width of the vertical house is 10~30 m; the width of the column 10 ~ 15m, the thickness of the top column is generally 6 ~ 8m; the height of the bottom column: the bottom structure of the funnel is 8 ~ 13m, the structure of the flat bottom is 5 ~ 8m.

When the vertical deep hole stage rock drilling stage mining method is adopted, the stage height is 50-60m; the mining room is arranged along the strike, 50~70m long and 15~20m wide; the vertical direction of the mining room is 15~20m wide and 25~ long. 40m; the bottom is mostly flat-bottom structure, the height of the bottom column is 6~8m; the thickness of the top column is 6~8m; the width of the column is 8~12m.

When using the vertical deep hole section rock drilling stage mining method, the stage height is 50-60m; the section height is 10~12~15m; the length of the mine is 30~50m; the width of the column is 8~12m; the height of the top column is 5~ 6m; the bottom column is 10 to 13m high.

When the large-diameter vertical deep-hole stage mining method is adopted, the stage height is 60-70 m; some 80-110 m; the length of the mining house is 30-60 m; the width is 18-25 m; the top column is 10-15 m thick; the bottom column is generally a flat-bottom structure. .

For the allowable exposed area of ​​the stage mining method, the empirical data can be used, as shown in Table 1.

Table 1 Phase domestic metal mine ore stope method allows an exposed area (m ²⁾