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Combined with Lade-Duncan strength criterion under plane strain condition, the coal wall spalling mechanism has been analyzed, the width of plastic zone and stress distribution has been studied, has identified the several important influencing factors, and using numerical simulation method for more intensive study, finally, the key technology of coal wall stability control is put forward which includes increasing the support strength, using side supporting design and taking coal wall grouting, through the field monitoring test, having achieved a good practical result, it provides a effective technical guarantee for thick coal seam in Wang Zhuang coal mine.

Study on the Key technology of Coal Wall Stability Control for Mining All Height at One Time in Thick Seam