Abstract
The forms of roof break, roof fall, and effects of the region scope in a fully mechanized top-coal caving (FMTC) face of the 101 fully-mechanized top coal caving face of the Tingnan Coalmine were analyzed by UDEC and FLAC3D software. The analysis result confirms the phenomenon of roof falling, roof-off-strata, roof breaking, first weighting, periodic weighting and stress concentration, redistributions of surrounding rock and so on. It provides the gist to analyze the law of roof movement, characteristic of confining pressure, and to determine the formative structure forms of the immediate roof and main roof during the caving process. These results and the underground pressure observation results are in agreement.
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