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Information × Registration Number 0204U003352, 0101U001109 , R & D reports Title Geomechanic fundamentals for maintenance of underground roadway stability using self-wedging effect popup.stage_title Head Nazimko Victor Victorovich, Registration Date 04-03-2004 Organization Donetsk National Technical University popup.description2 For the first time requirements for originating of broken rocks self-supporting effect in neighborhood of roadway experimentally are determined, which one are characterized by a simultaneity of rock blocks displacements in radial direction concerning center of a roadway and cramping component of stresses in horizontal concerning direction an outline of a roadway; the reason of vanishing of self-supporting effect for the first time is established, which one is encompass byed alternately displacement of next rock blocks in a inelastic strains zone, thus, positively influencing on roadways stability zones of contraction are inclined to a dissipation in time outside fissile affecting of mining operations owing to creepage and stress relaxation; is established, that the most interquartile shape of failure of a rocks self-wedging state is the forming of rock fold in roadways top/floor and less often in its sides; The dodge of progressing of a band of inelastic strains (as thinning front, behind which one isreshaped a crushing strain zone) around roadways is updated. Thus the advance of boundary of a breaking zone downs flows past spasmodically in room and time, and alternately in different directions; For the first time experimentally is demonstrated, that at the most minimum magnitudes of side afflux of the failure rocks (about 2-5MPa) the value of hardening self-supporting effect is maximum. Thus it is augmented with growth of source hardness of containing rocks; The new principles of roadways stability conservation in a zone of fissile affecting of an actual mining are designed. They grounded on supply of a simultaneity of radial displacements of the failure rocks in a roadways cross-section and on magnification of compression stresses with simultaneous leveling a major normal reductant in critical ranges (where originating self-wedging effect) is most interquartile. Product Description popup.authors popup.nrat_date 2020-04-02 Close