A safe mining method for deep, high-stress, thick ore bodies

CN116892411BActive Publication Date: 2026-03-13CENT SOUTH UNIV +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-07-11
Publication Date
2026-03-13

AI Technical Summary

Technical Problem

Existing technologies for constructing pressure relief holes to mine deep ore bodies can increase the workload of mining and cause instability in the roadway structure, leading to increased mining costs and safety hazards.

Method used

The method of mining the ore body boundary first and then mining the interior of the ore body is adopted. By setting up boundary stopes at the ore body boundary, the stress of the surrounding rock mass is unloaded by subsequent backfilling mining. Backfilling is carried out in a timely manner during the mining process to form flexible support and heat insulation layer, control the release of high ground stress, and ensure the safety and stability of mining inside the ore body.

Benefits of technology

It effectively unloads the high ground stress around the deep and thick ore body, reduces mining costs, improves the strength and bearing capacity of the surrounding rock, forms a water-proof and heat-insulating layer, creates a favorable ground pressure environment, and realizes safe and efficient ore body mining.

✦ Generated by Eureka AI based on patent content.

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Abstract

This invention discloses a safe mining method for deep, high-stress, thick ore bodies, comprising the following steps: Step 1: Determine the underground ore body parameters, including overall dimensions, occurrence, physical and mechanical properties of the ore body, surrounding rock condition, direction and magnitude of the maximum and minimum horizontal principal stresses, and lateral stress coefficients; Step 2: Determine the ore body boundary based on its occurrence state, and arrange boundary stopes around the ore body boundary; Step 3: After the boundary stope backfill is fully stabilized, the interior of the ore body is alternately divided into internal stopes and internal pillar stopes, and a subsequent backfilling mining method is used for large-span ore body mining, with stopes mined first, followed by pillars, with a one-to-one alternation between stopes and pillars; Step 4: Repeat Step 3 until the interior of the ore body is fully mined and backfilled. This invention provides a safe and reliable mining method with a strong foundation for implementation, representing a safe, efficient, and economical mining scheme for deep, high-stress, thick ore bodies.
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Citation Information

Patent Citations

  • A method for deep well unloading mining

    CN105134217B

  • Deep well unload mining method

    CN105134217A

  • Medium-thickness ore body continuous downward medium-length hole sublevel open-stoping subsequent filling mining method

    CN113356851A