caa a22 4500 469043016 CHVBK 20180323132816.0 cr unu---uuuuu 170328e19920901xx s 000 0 eng 10.1007/BF00881171 doi (NATIONALLICENCE)springer-10.1007/BF00881171 Estimation of critical convergence and rock load in coal mine roadways — an approach based on rock mass rating [Elektronische Daten] [C. Ghosh, A. Ghose] Summary: Based on field instrumentation in eight different coal mines representing varying depths and strata conditions, a relation for obtaining the critical convergence value has been established. In development heading for bord and pillar workings this relation can be used successfully to control the premature collapse of the roof. An empirical relation for rock load has been established. This can be utilized for optimum design of support system. The roofs have been categorized as stable, short-term stable and unstable. Proper attention should be provided for an unstable roof and the support design is to be changed before the convergence reaches the critical value. Chapman & Hall, 1992 Coal mine nationallicence rock mass classification nationallicence critical convergence nationallicence rock load nationallicence support design nationallicence Ghosh C. Central Mining Research Station, 826 001, Dhanbad, India aut Ghose A. Indian School of Mines, 826 004, Dhanbad, India aut Geotechnical & Geological Engineering Kluwer Academic Publishers 10/3(1992-09-01), 185-202 0960-3182 10:3<185 1992 10 10706 https://doi.org/10.1007/BF00881171 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00881171 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ghosh C. Central Mining Research Station, 826 001, Dhanbad, India aut NATIONALLICENCE 700 1- Ghose A. Indian School of Mines, 826 004, Dhanbad, India aut NATIONALLICENCE 773 0- Geotechnical & Geological Engineering Kluwer Academic Publishers 10/3(1992-09-01), 185-202 0960-3182 10:3<185 1992 10 10706 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer