Discrete cemented filling mining method

By employing a granular cemented backfilling method in the mining of deep-buried ore bodies, the granular solidified body formed by the backfill slurry is used to support the collapse space, thus solving the problems of surface subsidence and low production efficiency, and achieving efficient and economical ore body mining.

CN121184129APending Publication Date: 2025-12-23NORTHEASTERN UNIV CHINA
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Patent Information

Application Number
CN202511725409.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-11-24
Publication Date
2025-12-23

AI Technical Summary

Technical Problem

Existing technologies for mining deep-buried ore bodies suffer from risks of surface subsidence, low production efficiency, and high costs. In particular, the caving method leads to surface subsidence, and the step-by-step mining method with filling results in low production efficiency and high costs, making it difficult to achieve economical and efficient mining.

Method used

The method of granular cemented backfilling involves setting up a backfilling roadway above the collapse space, constructing backfilling pipelines and monitoring holes, injecting backfilling slurry into the collapse space, forming a granular solidified body, supporting the collapse space, enabling continuous mining, and avoiding mutual interference between backfilling and mining operations.

Benefits of technology

It enables timely management of collapsed spaces, prevents surface subsidence, improves production efficiency and safety, reduces production costs, is suitable for long-term projects, and fully considers the requirements of efficient and green mining.

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Abstract

The invention belongs to the technical field of underground mining of metal ore deposits, and relates to a discrete cemented filling mining method which comprises the following steps: step 1, arranging a filling roadway above a caving space; 2, a filling pipeline and a monitoring hole are constructed downwards in the caving space through the filling roadway; 3, partial stoping is carried out on the sections to enlarge the caving space, so that the rock mass above the caving space is caved, and then a discrete body and a free space are formed in the caving space; 4, filling slurry is injected into the bulk solids in the caving space through the filling pipeline according to the monitoring result of the monitoring hole on the caving space and the bulk solids; and 5, stopping the mining operation of the subsections, waiting for filling slurry to solidify the discrete body, and continuing to stoping the rest part of the subsections to complete the mining operation of the subsections. According to the monitoring result of the caving space, the filling slurry is injected into the discrete body through the filling pipeline, so that the filling operation and the stoping operation are synchronously carried out, and the mining efficiency is greatly improved.
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