Dimension analysis-based metal mine goaf overlaying strata caving height prediction method

Dimension analysis-based metal mine goaf overlaying strata caving height prediction method

  • CN 103,823,992 A
  • Filed: 03/12/2014
  • Published: 05/28/2014
  • Est. Priority Date: 03/12/2014
  • Status: Active Application
First Claim
Patent Images

1. the metal mine overburden of the goaf based on dimensional analysis is caving a Height Prediction method, it is characterized in that:

  • comprise the following steps;

    The first step;

    field measurement or indoor test go out orebody thickness d, mining depth h, tectonic stress σ

    h, goaf area s, rock unit weight γ

    , the loose coefficient k of rock, hardness factor f data;

    Second step;

    by first step the data obtained, substitution formula;

    lgHd=2.1185-1.2359lg&

    gamma;

    &

    CenterDot;

    d
    &

    sigma;

    h
    +1.3204lgf-3.0502lgk-0.9582lghd+0.0114lgSd2
    In, can obtain mine worked-out section overlying strata and be caving pre-computed altitude H;

    In formula;

    H-be caving pre-computed altitude, unit;

    m;

    D-orebody thickness, unit;

    m;

    γ

    -rock unit weight, unit;

    MPa;

    σ

    h-tectonic stress, unit;

    MPa;

    H-mining depth, unit;

    m;

    S-goaf area, unit;

    m 2;

    The hardness factor of f-overlying strata;

    K-rock coefficient of volumetric expansion.

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