Method and system for treating gangue through paste-slurry combined filling under cutting-off type roof condition

By using a combined paste-slurry filling method, the paste is used to support the roof collapse and the slurry is used to fill and dispose of gangue, which solves the problem of gangue resource utilization under the condition of sheared roof and realizes the large-scale disposal and environmental protection of gangue in the mine.

CN121576128APending Publication Date: 2026-02-27中煤能源研究院有限责任公司 +1
0 Cites 2 Cited by

Patent Information

Application Number
CN202511916978.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-12-18
Publication Date
2026-02-27

AI Technical Summary

Technical Problem

Under sheared roof conditions, the capacity for resource utilization of gangue generated from coal mining is limited, and gangue cannot be fully disposed of, leading to ineffective transportation and environmental pollution. Traditional backfilling technologies are not applicable.

Method used

The paste-slurry combined filling method is adopted, which uses paste filling to support the roof collapse and slurry filling to dispose of gangue. The combined paste-slurry operation realizes the complete filling of solid waste gangue in the mine, including designing the filling spacing and selecting equipment to construct a stable slurry filling space.

Benefits of technology

It has achieved complete underground backfilling of the mine's million-ton-level gangue, reducing ineffective transportation, eliminating environmental pollution, reducing mine pressure, solving the problem of roof collapse, and preventing surface subsidence.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The invention discloses a method for treating gangue through paste-slurry combined filling under the condition of a cut-off type roof, which specifically comprises the following steps: obtaining the yield and particle size distribution of mine gangue according to a product balance table for guiding a paste filling system, an underground coal gangue separation system and a slurry filling system; filling spacing is dynamically adjusted according to the lithology of the roof, the filling spacing is determined by controlling the number of intervals of the supports, it is guaranteed that a paste roof-contacted supporting roof rock stratum collapses, and a stable slurry filling space is constructed; gangue in a ground gangue bin enters a slurry filling system and automatically flows to a slurry pump to be pumped to the position above a working face along a filling pipeline, vertical drilling is constructed in an underground goaf to the position above a slurry filling space, and the filling pipeline is arranged to complete filling; the large-scale disposal of all gangues above and below the mine is completed according to continuous and sequential circulation of mine excavation. By means of paste-slurry filling combined operation, all underground filling treatment of underground gangue solid waste of the million-ton level is achieved, support to a top plate is reinforced through paste-slurry combination, and mine pressure is effectively weakened.
Need to check novelty before this filing date? Find Prior Art