Similar Simulation Research on Overburden Strata Movement Law in Mining of Protective Seam
CHENG Guojian
Abstract：In this paper, by taking the mining of the gassy outburst coal seam group in Qidong Mine as the engineering background, study was carried out on the influence of the mining of the protective seam upon the movement law of the overlying strata through the similar simulation experiments, the experimental results showed that both the large and small periodic weighting existed in the working face, the distance of the large periodic weighting was 18. 0 to 25. 0 m and that of the small periodic caving was 15. 0 to 17. 5 m;the distribution regularity of the abutment pressure after the mining of the working face and the dynamic loading factor were obtained by analysis; the maximum development height of the caving zone was about 8. 0 to 10. 0 m and that of the separated overburden strata was 23 m. The research results provided an important theoretical basis for the guidance of the high-location drilling in the gob and the design of gas drainage parameters.
Keywords：mining of protective seamoverburden strata movement lawsimilar simulation
Publication Date：2015-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 21-24,28 )