Layered strip mining method for gently inclined ore body

Abstract

The invention relates to a layered strip mining method for a gently inclined ore body. According to the technical scheme, the mining method aims at the gently inclined ore body, and comprises the steps of ore block division and layout of stope preparation cutting, blasting, ventilation, mining and filling and transporting. The step of ore block division is that different panels are divided at eachstage, the panels are arranged along the ore body trend, a stage transportation roadway is excavated along the ore body trend, and the same number of ore rooms are divided on the left and right sideswith a floor rise in the middle of each panel as a boundary. Mining and filling have three steps that 1, ores in the upper layers of the ore rooms are stoped; 2, ores in the lower layers of the ore rooms are stoped; and 3, after the ore rooms are subjected to cemented filling, inter-columns in the panels are stoped, and the inter-columns are subjected to cemented filling after stoping. In the panels, the stoping of the step 1 and the stoping of the step 2 are sequentially conducted from top to bottom, and the principle of stoping every other ore room is strictly met; and after the mining of asingle ore room is completed, the approach road of the floor rise is closed, the ore rooms are filled by the approach road of a roof rise, after the ore rooms in a single panel are all mined and filled, the inter-columns in the panels are stoped, the mining mode is that mining is conducted from top to bottom, and filling is conducted after mining. The layered strip mining method has the characteristics that the mining cost is low, the ore stoping rate is high, and the mining efficiency is high.

Description

technical field [0001] The invention belongs to the technical field of gently inclined ore bed filling and mining. In particular, it relates to a layered strip mining method of a gently inclined ore body. Background technique [0002] The methods used in the mining of gently inclined deposits are mainly the room-and-pillar method and the caving method. The prominent disadvantages of the room-and-pillar method are that the operating conditions are poor, stope roof fall and slab accidents occur frequently, and the recovery rate of the reserved ore pillars is low. The outstanding disadvantage of the caving method is that the surface is easy to subside, which will cause instability of the working face and restrict the production capacity of the mine. Contents of the invention [0003] The present invention aims to overcome the deficiencies of the prior art and provide a layered strip mining method for gently inclined ore deposits with high ore recovery rate, low dilution rat...

AI Technical Summary

Problems solved by technology

The prominent disadvantages of the room-and-pillar method are that the operating conditions are poor, stope roof fall and slab accidents often occur, and the recovery rate of the remaining pillars is low.

The outstanding disadvantage of the caving method is that the ground surface is easy to subside, which will cause instability of the working face and restrict the production capacity of the mine.

Images