WebWhen the water depth was only 2–6 m, the hydraulic filling method had to be used, in which the sand fill was pumped through pipes from either a rehandling pit or a trailer suction … WebHistorically backfill has tended to be sand and cement placed as a slurry into the mined stope. This is often referred to as cemented hydraulic fill (CHF). This method is used in many operations today. Variants on this are also used including the placement of aggregate or rock into the stope with the cemented fill, such as those
Laboratory testing of cemented paste backfill Request PDF
Web8 apr. 2024 · Lecampion B, Bunger A, Zhang X (2024) Numerical methods for hydraulic fracture propagation: a review of recent trends. J Nat Gas Sci Eng 49:66–83. Article Google Scholar Li J, Dong S, Hua W, Yang Y, Li X (2024) Numerical simulation on deflecting hydraulic fracture with refracturing using extended finite element method. WebThe coarser fractions are placed Backfill has a typical low modulus of elasticity of around underground as hydraulic backfill and the slimes rejected to the 500MPa and is typically one to two orders of magnitude … split csv command prompt
Proceedings Free Full-Text A Method for Smoothly Disengaging …
WebBranch Chief. National Institute for Occupational Safety and Health. Jan 2024 - Present1 year 4 months. Manage research teams for the Miner Safety Branch at the Spokane Mining Research Division. Web17 jun. 2024 · An Alternative Cemented Hydraulic Sand Backfill Method for Large Spans in an Underhand Cut-and-Fill Deep Metal Mine Conference: 52nd US Rock Mechanics / … WebThe mechanical behavior of cemented paste backfill (CPB) in permafrost regions may depend on the thermal curing conditions. However, few experimental data are available for calibrating and validating numerical models used to predict these conditions. To fill this gap, a three-dimensional (3D) laboratory heat transfer test was conducted on CPB placed in … split csv files by rows