Environmental reconstruction subsection medium-length hole subsequent filling mining method

Abstract

The invention discloses an environmental reconstruction subsection medium-length hole subsequent filling mining method which is mainly suitable for ore rock crushing and thick or extremely thick inclined ore body stopping. An ore body is divided into disc areas and ore blocks, the ore blocks are divided into first-step stopes and second-step stopes, and stopping is conducted through two steps. Themethod comprises the steps that firstly, the first-step stopes, ore bodies in the range of top columns arranged on the upper portions of the second-step stopes and ore bodies at the bottoms of the second-step stopes are stoped by adopting a drift-and-fill method, and filling is conducted by adopting high-strength cemented filling bodies; secondly, disc ore bodies on the first-step stopes and thesecond-step stopes are stoped by adopting the drift-and-fill method; and lastly, the second-step stopes are stoped by adopting a staged deep-hole empty-field subsequent filling method. The environmental reconstruction subsection medium-length hole subsequent filling mining method has the advantages that the stopping operation safety is good, the production capacity of the stopes is high, the production cost is low, and the ore body production condition change and horse stone adaptability is good.

Description

technical field [0001] The present invention relates to the technical field of mining methods in underground mines, and is a mining method of segmented middle and deep holes followed by filling after environmental reconstruction. Background technique [0002] Previously, the caving method was often used for mining when the ore rock was broken and the thick to extremely thick inclined ore body was mined. However, large-scale mining using the caving method will inevitably lead to surface subsidence deformation and subsidence, and the deeper the mining depth, the larger the scope of surface subsidence deformation and subsidence, so the applicable scope of caving method is getting smaller and smaller. The filling method has the advantages of safe mining operation, low loss and dilution, and effective control of surface subsidence, deformation and subsidence, and can use ore dressing tailings as filling aggregate to be filled underground, reducing the safety hazards and environme...

AI Technical Summary

Problems solved by technology

[0005] Therefore, if the successful application of the segmented medium-deep hole subsequent filling method in the mining of rock fragmentation and thick to extremely thick inclined ore bodies will be effectively solved, the stope production capacity and efficiency of the above-mentioned types of ore body filling methods will be effectively solved. Low, complex working procedures, etc.

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