Layering and sectioning combined mining method for broken orebody interlayer

Abstract

The invention discloses a layering and sectioning combined mining method for a broken orebody interlayer. According to the method, panel areas and panel interval columns are sequentially divided alongthe direction of the broken orebody interlayer, wherein step 1 room stopes and step 2 column stopes are sequentially divided in each panel area along the vertical direction, the horizontal directionof each step 1 room stope is formed by two parallel routes, the number of routes in the vertical direction is determined by the subsection height, filling is instantly performed after mining is finished, and cemented backfills are formed to replace columns; after mining and filling of the step 1 room stopes in the panel areas are completed, mining and filling are transformed into backstopping of step 2 column stopes, the step 1 cemented backfills are arranged on two sides of the step 2 stopes, and an efficient mining method for of long anchor rope pre-reinforced downward parallel deep hole segmented open stoping post-mining filling is adopted for the step 2 column stopes. The combined mining method mainly aims at backfilling of a broken orebody interlayer, which can be well joined with steady orebodies on two sides of the interlayer, so that the aim of safely and efficiently backfilling the broken orebody interlayer can be achieved.

Description

technical field [0001] The invention relates to a broken ore body mining technology, in particular to a layered and segmented combined mining method for the broken ore body interlayer. Background technique [0002] There are many relevant researches at home and abroad on mining conditions, mining methods, mining technology and equipment, support methods and parameters, and economic rationality of broken ore bodies. For broken and thick ore bodies, commonly used mining methods include pillar-less segmented caving method, staged natural caving method, segmented empty field and subsequent filling mining method, point-pillar type layered filling mining method or approach filling mining method, etc. The main support forms of broken rock mass include anchor net spray support, curtain grouting support, advanced pipe shed + steel arch support, integral rigid support, U-shaped steel retractable support support, rigid support plus flexible body Cushion support, joint support, etc. ...

AI Technical Summary

Problems solved by technology

[0003] For the broken ore body interlayer, the two sides of the interlayer are relatively stable ore bodies for normal mining, and the mining technical conditions are much worse than those for stable ore body mining. Joints and fissures are developed, local mud is formed, it is difficult to excavate, and caving is prone to occur. There is a big difference in the mining methods of the two. How to safely and efficiently mine the interlayer of the broken ore body while taking into account the normal mining of the more stable ore bodies on both sides has rarely been reported.

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