Method for predicting weathering degree of slope of strip mine stope

CN120257618AActive Publication Date: 2025-07-04UNIV OF SCI & TECH BEIJING +1
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Patent Information

Application Number
CN202510359646.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-03-25
Publication Date
2025-07-04
Estimated Expiration
2045-03-25

AI Technical Summary

Technical Problem

In the prior art, the assessment of the degree of weathering of rocks on slopes of open-pit mines mainly relies on qualitative methods, and there is great subjectivity, and it is impossible to accurately predict future weathering trends, resulting in insufficient timeliness of protection against collapse disasters.

Method used

A quantitative evaluation method is adopted that comprehensively considers the size and quantity of pores inside the rock, altered mineral content, peak strength and longitudinal wave velocity ratio. Through on-site sampling, longitudinal wave velocity test, uniaxial compression test, nitrogen adsorption specific surface area test and XRD mineral diffraction test, a quantitative calculation method for the degree of weathering on the open-pit ore slope is constructed, and a spatiotemporal evolution model is constructed to predict the future weathering time and mining location of weathering.

Benefits of technology

Quantitative calculation and prediction of the degree of weathering of open-pit mine slopes is achieved, timely warning and support measures are provided, and the risk of collapse disasters is reduced.

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Abstract

The invention provides a strip mine stope slope weathering degree prediction method, and in the field of dynamic weathering degree grade discrimination, the method comprises the following steps: carrying out on-site sampling on a to-be-evaluated area, and preparing a plurality of rock samples; carrying out longitudinal wave velocity test on the plurality of rock samples, carrying out uniaxial compression test on the plurality of rock samples, and carrying out nitrogen adsorption specific surface area test on the plurality of rock samples; performing an XRD mineral diffraction test on the plurality of rock samples, and obtaining a rock weathering degree grading standard based on the weathering grade of the rock sample under the longitudinal wave velocity ratio condition, the weathering grade of the rock sample under the peak intensity ratio condition, the rock void ratio of the rock sample and the rock altered mineral content of the rock sample; and taking the mining age limit as a target time sequence sample, constructing a space-time evolution model of the rock weathering degree of the strip mine slope, and predicting the rock weathering degree at the future weathering time and mining position.
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Citation Information

Patent Citations

  • Numerical discrimination method of rock mass weathering and unloading

    CN108614947A

  • Quantitative evaluation and prediction method and device for weathering degree of sea-eroded cliff rock

    CN116913416A

  • Predicting system and method for uniaxial compressive strength of rock

    US20220334035A1

  • System and method for determining degree of weathering of igneous rock in tunnel

    WO2021147553A1

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