A near-vertical super-thick coal seam mining and caving process flow coordination method
By dividing the nearly vertical extra-thick coal seam into multiple horizontal segments, establishing a low-level mining and high-level backfilling system, and employing a coal mining machine, a mesh-laying and grout-blocking support, a detection device, and a grouting system to work in tandem, the problems of surrounding rock instability and low resource recovery rate in the nearly vertical extra-thick coal seam were solved. This achieved efficient synergistic operation of coal mining and backfilling, and improved the stability of the surrounding rock and the resource recovery rate.
CN120444024BActive Publication Date: 2026-05-12CHINA UNIV OF MINING & TECH
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Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHINA UNIV OF MINING & TECH
- Filing Date
- 2025-06-27
- Publication Date
- 2026-05-12
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Figure CN120444024B_ABST
Abstract
A kind of near-vertical super-thick coal seam mining and filling process flow coordination method belongs to coal mining technical field, including the following steps: near-vertical super-thick coal seam is divided into multiple segments, low-position mining and drawing system is established at the bottom of each segment, high-position filling system is established at the horizontal position of each segment top interface;Including mining period and filling period, after establishing the low-position mining and drawing system, mining and drawing work is carried out by mining machine and support during mining period, new type support lays isolation net in goaf synchronously during machine-moving support process, new type support spreads out after advancing a filling step distance, then filling slurry is injected into goaf through high-position filling technology roadway, filling chamber and filling hole in turn, maintains near-vertical surrounding rock stability, ensures mining depth safety deepening;Effectively solve the problems of difficult surrounding rock instability prevention and control, difficult graben-type subsidence control and low coal resource recovery rate in the present horizontal segmented fully-mechanized mining method of steeply inclined near-vertical super-thick coal seam.
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