Flat-bottomed structure segmental rock drilling stage and then filling mining method

Abstract

The invention relates to the technical field of mining of metal and non-metal ores, in particular to a flat-bottom structure segmental rock drilling method suitable for mining steeply inclined and inclined ore bodies. The mining method of the present invention is suitable for thick ore body, ore body footwall boundary and base plate surrounding rock contact surface friction force is relatively small, ore fluidity is good, ore footwall movement angle is more than 30 ° steep slope And the mining of inclined metal and non-metal ore bodies. It realizes segmental open-pit mining, and then fills the empty space, which not only has the high mining efficiency of the caving method, but also has the safety of the filling method. The mining environment is safe, and the goaf is treated by filling method, which improves the ore recovery rate and reduces the ore dilution rate.

Description

Technical field[0001]The invention relates to the technical field of mining of metal and non-metal ore, in particular to a flat-bottom structure segmented rock drilling stage suitable for mining steep and inclined ore bodies, followed by filling mining method.Background technique[0002]Traditional mining methods, especially the mining bodies, are covered with high confined aquifers, and the water source is adequately recharged. The drainage of the mineral deposits affects the irrigation and drinking water of the surrounding villagers, which is likely to cause social and environmental problems. The surface is cultivated land and roads, and collapse is not allowed. It is necessary to strictly protect the surface. Similar to the "three-under" mining, there are more problems, and it is impossible to achieve safe, efficient and continuous low-cost mining of this type of ore body. Many mines can only use sub-drilling stage mining and subsequent filling mining method or room and pillar meth...

AI Technical Summary

Problems solved by technology

However, the "segmented rock drilling stage mining method followed by filling mining" is generally applied to ore body stabilization, and the ore body occurs in a steeply inclined ore body, that is, the ore body dip angle is greater than 55°, which is convenient for concentrated ore extraction from the bottom segment , the other auxiliary sections are only responsible for rock drilling, charge blasting, and loose ore; in inclined (ore body dip angle 30°-55°) ore bodies, the application of the "segmented rock drilling stage and subsequent filling mining method" has ore At the same time, there are also problems such as large exposed area of ​​the roof, long mining and filling cycle time, easy leakage of the roof of the mining house, and high safety risks. It is easy to cause the roof to fall, and the mining difficulty of other mines will be increased after the ground pressure appears; the room-and-pillar filling mining method has problems such as low recovery rate

[0003] Therefore, there is a contradiction between efficiency, safety, cost, dilution and loss in the mining of complex environments with moderately stable orebody stability, steeply inclined and extremely thick inclined orebodies.

Images