Method for judging filling position and filling opportunity of coal mine goaf

By combining surface monitoring with subsidence volume and rate to determine the location and timing of goaf filling, the problem of high labor intensity and cost in existing technologies has been solved, achieving efficient and low-cost goaf filling determination.

CN122014335APending Publication Date: 2026-05-12SHAANXI COALFIELD GEOLOGY GRP CO LTD
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Patent Information

Application Number
CN202512042056.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-12-31
Publication Date
2026-05-12

AI Technical Summary

Technical Problem

Existing technologies suffer from high labor intensity, high detection costs, and difficulty in large-scale, multi-point deployment when determining the location and timing of filling in coal mine goafs. Numerical simulations lack sufficient accuracy in matching with the field, and there is a lack of monitoring schemes that incorporate rock strata structure.

Method used

By collecting basic mine data, analyzing overburden migration patterns, designing surface monitoring schemes, using total stations to monitor surface subsidence, and combining subsidence rates to determine filling space and timing, multi-point surface monitoring is adopted to replace drilling geophysical exploration, providing real-time data support for subsidence volume and rate.

Benefits of technology

It enables efficient and low-cost determination of the location and timing of goaf filling, improves the efficiency of single-point measurement, reduces drilling construction costs, and provides accurate indicators for the spatial distribution characteristics and timing of filling.

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Abstract

The invention provides a coal mine goaf filling position and filling opportunity judgment method, and belongs to the technical field of coal mine goaf filling, and the method comprises the following steps: S1, collecting mine basic data; s2, according to the collected basic data, analyzing an overlying strata migration mode, determining overlying strata three-zone distribution characteristics, a key layer position and a separation layer position, and determining a caving zone height Hf, a fissure zone height Hf and a separation layer position height Hs; s3, designing a monitoring scheme suitable for goaf filling space judgment, and determining implementation details of the monitoring scheme; s4, deriving the subsidence amount according to the data acquisition frequency to obtain the subsidence rate, and outputting the actually measured surface subsidence rate; s5, the filling space and the filling opportunity are judged, and goaf remaining space distribution and judgment standards are provided; and S6, judging whether the goaf corresponding to the observation point has a filling space or not according to the judgment result, and determining a favorable filling opportunity.
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