Thin ore body panel downward drift subsequent filling mining method

By adopting the panelized downward-directional subsequent filling mining method in the extremely thin vein mining site, combining artificial fake bottom structure and troughless blasting technology, the problems of roof management difficulties and filling management difficulties during the mining process of extremely thin vein are solved, and mining efficiency and safety are improved.

CN119572235APending Publication Date: 2025-03-07INNER MONGOLIA JINTAO CO LTD +1
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Patent Information

Application Number
CN202411765717.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-04
Publication Date
2025-03-07

AI Technical Summary

Technical Problem

During the mining process of extremely thin ore veins, roof management is difficult, easy to rise, and the preparation and conveying of filler materials are difficult to grasp, resulting in low mining efficiency.

Method used

The mining method is used to fill the lower approach route later by digging the transportation tunnel along the vein at the upper and lower parts of the mining site, and then drilling shallow holes for mining. After the mining, artificial fake bottom structure is made to support the upper and lower plates. The trenchless blasting technology is used for the project route type mining, and finally one-time subsequent filling is performed.

Benefits of technology

It improves the flexibility of filling and mining site recovery efficiency, reduces blasting costs, improves rock drilling and blasting efficiency, ensures the safety of the mining process, reduces the filling time of filling operations, and speeds up the filling cycle of ore blocks.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention discloses a thin ore body panel downward drift subsequent filling mining method. Relates to the technical field of mining, and comprises the following steps: arranging a stope, respectively digging a vein-following transportation roadway in a vein at the upper part and the lower part of the stope, and constructing a plurality of courtyards in the vein; an upward shallow hole is drilled in the middle-section transverse drift transportation roadway, ore is stoped in a layered mode, an artificial false bottom structure is manufactured in the goaf, and the goaf above the false bottom is filled; construction of a first-layer access road is conducted in a vein-following transportation roadway on the upper portion of the stope, shallow holes are drilled in a vein-following bottom ore body for blasting, scattered and broken ore is laid at the bottom firstly, and then an artificial false bottom is constructed to fill the space; after the first-layer drift is completed, drift type stoping is conducted on the two sides with the raise as a free face; after stoping of the whole drift is completed, scattered and broken ore is reserved at the bottom of the drift to serve as a blasting free face for tunneling of the next layer of drift, and then construction of an artificial false bottom is conducted; when the next layer of drift is mined, the scattered and broken ore remained at the bottom is used as a free surface for blasting, and then the subsequent blast hole is detonated; after stoping of the last layer of drift is completed, all openings in the stope are sealed to prevent leakage of the filling slurry, and then the stope is subjected to one-time filling; according to the method, the downward drift subsequent filling mining method is adopted for the extremely-thin difficult-to-mine body, the filling flexibility is improved, and the stoping efficiency of a stope is improved.
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Citation Information

Patent Citations

  • Downward drift filling and medium-length hole stage subsequent filling collaborative mining method based on hanging wall support

    CN116201549A

  • Waste rock stoping follow-up filling mining method

    CN116335671A

  • Deep-hole ore breaking and drawing subsequent filling mining method for steeply-inclined extremely-thin vein

    CN116816350A

  • Approach open stope subsequent filling mining method for gently inclined medium-thick ore body

    CN109339783A

  • Mining method of thin vein

    CN111852473A