Indoor spectral layered measuring method for poisonous and harmful elements at mine reclamation area

Indoor spectral layered measuring method for poisonous and harmful elements at mine reclamation area

  • CN 104,596,943 A
  • Filed: 12/30/2014
  • Published: 05/06/2015
  • Est. Priority Date: 12/30/2014
  • Status: Active Application
First Claim
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1. a land reclamation in mining area place poisonous and harmful element indoor spectral layering measuring method, is characterized in that, comprise the following steps:

  • (1) soil modeling sample in land reclamation in mining area place gathers;

    reclamation field soil modeling sample can be multiple soil layer according to the different demarcation of its technique of reclaiming, compaction material, can be divided into 0 ~ 20cm, 20 ~ 40cm, 40 ~ 60cm, 60 ~ 80cm, >

    =80cm five soil layers for subsided land from coal mine coal field Reclamation by filling place;

    According to the collection principle of mixed soil sample and special soil sample, stratified sampling, determines the sampling unit of modeling sample, number of samples and sampling section, adopts inquartation to fetch earth, through air-dry, grind, sieve after layering dress sample;

    (2) modeling sample high-spectral data gathers;

    the wavelength coverage arranging EO-1 hyperion instrument, and in darkroom, layering gathers soil high-spectral data;

    (3) modeling sample spectroscopic data pre-service;

    background removal, denoising, breakpoint correction, smoothing processing, standard normal variable conversion, Spectroscopy differential technology and continuum Transformatin are carried out to the original spectral data gathered;

    (4) modeling sample poisonous and harmful element reference values;

    measure poisonous and harmful element content in modeling pedotheque according to standard method of analysis layering;

    (5) poisonous and harmful element coerces sensitivity spectrum band selection;

    by the modeling sample poisonous and harmful element reference value of mensuration with carry out the high-spectral data after pre-service and changing features and carry out correlation analysis, the land reclamation in mining area place soil poisonous and harmful element choosing correlativity maximum coerces sensitive band;

    (6) foundation of model;

    for the characteristic parameter extracted, in order to avoid the correlativity of characteristic parameter self, adopts principal component analytical method to filter out optimum spectral signature parameter;

    (7) model stability and predictive ability evaluation;

    by coefficient of determination R 2with the Pearson correlation coefficient p stability of evaluation model and the predictive ability of model respectively, according to the error requirements in actual production, model is corrected;

    (8) models applying;

    gather high-spectral data according to step (2) and (3) and carry out pre-service, with the calibration model of empirical tests, quantitative layered weighting being carried out to land reclamation in mining area place soil poisonous and harmful element.

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