Mining method of mid-deep hole falling with anchor cable support and subsequent filling in combined reconstruction structure

Abstract

The invention discloses a medium-length hole ore breaking synergistic anchor cable support subsequent filling mining method of a combined reconstructed structural body. The method adopts downward type sublevel stoping, and comprises the following steps: firstly, excavating a top cut heading way in a hanging wall surrounding rock; building an artificial roof (reserved with a fill raise) along the ore body striking direction by adopting smooth blasting after top cut is completed; excavating a multifunctional roadway integrating the functions of rock drilling, supporting and ore removal along the ore body striking direction in the hanging wall surrounding rock; and arranging fan-shaped blast holes by medium-length holes, and arranging a surrounding rock grouting reinforcement and anchor cable support hanging wall project by utilizing the medium-length holes at the same time to integrate surrounding rock grouting reinforcement, ore breaking by blasting and anchor cable support. By adopting retreat type stoping and ore removal by a scraper, the method realizes safe, efficient and large-scale stoping of ore bodies. The mining method is suitable for mining the inclined ore bodies with surrounding rocks which are evenly and stably distributed, and has the characteristics of being small in stope preparation work amount, safe and reliable to operate, high in stoping efficiency, etc.

Description

technical field [0001] The present invention relates to a mining method for underground metal mines, in particular to a method for mining in combination with middle and deep holes under a combined restructured structure to cooperate with anchor cable support and then filling. Steady, inclined medium-thick ore body with high ore grade. Background technique [0002] For high-grade sloping medium-thick ore bodies whose roof, floor, and upper and lower wall rocks are broken and unstable, the upward or downward layered filling method is generally used for mining, and support measures such as bolts and anchor nets are required for layer-by-layer mining. The process is complicated, and the staff generally operate under the exposed surface or under the collapsed rock formation, and its production safety is relatively poor. The outstanding problems are that the mining and cutting works are large and the mining cost is high; the efficiency of layered mining is low, and it is difficul...

AI Technical Summary

Problems solved by technology

[0002] For high-grade sloping medium-thick ore bodies whose roof, floor, and upper and lower wall rocks are broken and unstable, the upward or downward layered filling method is generally used for mining, and support measures such as bolts and anchor nets are required for layer-by-layer mining. The process is complicated, and the staff generally work under the exposed surface or under the collapsed rock formation, and its production safety is poor

The outstanding problems are that the mining and cutting works are large and the mining cost is high; the efficiency of layered mining is low, and it is difficult to realize large-scale mining; the surrounding rock support operation of the upper and lower walls lags behind the blasting operation, and the loss and dilution of ore are high. cause great economic loss

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