Gurtunca, RGAdams, DJ2013-05-032013-05-031991-03Gurtunca, R.G and Adams, D.J. 1991. Determination of the in situ modulus of the rockmass by the use of backfill measurements.Gurtunca, R.G and Adams, D.J. 1991. Determination of the in situ modulus of the rockmass by the use of backfill measurements. Journal of the South African Institute of Mining and Metallurgy, vol. 91(3), pp 81-88http://hdl.handle.net/10204/6718Copyright: 1991 Journal of the South African Institute of Mining and Metallurgy, vol. 91(3), pp 81-88In situ measurements and numerical modelling based on elastic theory showed that backfill stresses are considerably higher than originally thought. This has led to a change in understanding of rockmass behaviour. After describing previous work on the behaviour of the rockmass, this paper discusses possible reasons for the high stresses measured in backfill, and identifies the rockmass mechanisms possible generating these stresses. It is concluded that the joints and the geological stratigraphy can lead to increased elastic convergence, and that the elastic behaviour of the rockmass is also partly responsible for the increased closure measured in backfill. The use of an in situ modulus is suggested as an interim solution until a new computer model that allows for joints, different layers, and inelastic closures becomes available.enBackfillsElastic theoryStress (Physiology)Backfill measurementsBackfill stressesRockmass behaviourNumerical modellingReportGurtunca, R., & Adams, D. (1991). <i>Determination of the in situ modulus of the rockmass by the use of backfill measurements</i> (Report no;NS 1047). CSIR. Retrieved from http://hdl.handle.net/10204/6718Gurtunca, RG, and DJ Adams <i>Determination of the in situ modulus of the rockmass by the use of backfill measurements.</i> Report no;NS 1047. CSIR, 1991. http://hdl.handle.net/10204/6718Gurtunca R, Adams D. Determination of the in situ modulus of the rockmass by the use of backfill measurements. 1991 [cited yyyy month dd]. Available from: http://hdl.handle.net/10204/6718TY - Report AU - Gurtunca, RG AU - Adams, DJ AB - In situ measurements and numerical modelling based on elastic theory showed that backfill stresses are considerably higher than originally thought. This has led to a change in understanding of rockmass behaviour. After describing previous work on the behaviour of the rockmass, this paper discusses possible reasons for the high stresses measured in backfill, and identifies the rockmass mechanisms possible generating these stresses. It is concluded that the joints and the geological stratigraphy can lead to increased elastic convergence, and that the elastic behaviour of the rockmass is also partly responsible for the increased closure measured in backfill. The use of an in situ modulus is suggested as an interim solution until a new computer model that allows for joints, different layers, and inelastic closures becomes available. DA - 1991-03 DB - ResearchSpace DP - CSIR KW - Backfills KW - Elastic theory KW - Stress (Physiology) KW - Backfill measurements KW - Backfill stresses KW - Rockmass behaviour KW - Numerical modelling LK - https://researchspace.csir.co.za PY - 1991 T1 - Determination of the in situ modulus of the rockmass by the use of backfill measurements TI - Determination of the in situ modulus of the rockmass by the use of backfill measurements UR - http://hdl.handle.net/10204/6718 ER -