WebFrom this description, it may appear that the strength of the overall fill mass will be the strength of the cemented matrix, and if the target strength is met with a cemented paste fill content of 5% cement content, then a 50/50 mixture of paste fill and rock would require only 2.5% cement content to achieve the same target strength as the 5% … Web16 Apr 2024 · Different back fill materials are used depending on the mining method and the extraction sequence of the stopes in an underground mine. Common fill materials are …
Backfill - Welcome to the Narrow-Vein Mining Project
WebThe primary advantages of paste fill are: .. The fill has little or no bleed water, simplifying mine dewatering. • As total tailings are used, the surface disposal problems are reduced. • Paste can be "engineered" to provide the required strength for different parts of the mine. The primary disadvantage is the high cost of using paste fill. Web1 Jan 2016 · "In recent years, use of mineral processing tailings as a paste backfill has been significantly increased due to the environmental problems occurred during the disposal of the tailings in mine area. The paste material used to fill the stopes excavated is generally consisted of tailings (solid ratio: 70–85%) and cement (3-7%w/w). Meanwhile, the … stuart address obituary
Backfill - QueensMineDesignWiki
WebPaste filling or Back filling is a method used to dispose of mine tailings underground, to backfill underground mine stopes, or to achieve both simultaneously. WebPaste fill is comprised of full mill tailings with a typical effective grain size of 5 μm, mixed with a small percentage of binder, in the order of 3–6% by weight, and water. It is the … Web10 Jun 2024 · At the Lucky Friday Mine, use of cemented paste backfill (CPB)—a high-density mixture of water, classified mill tailings, and cement—in conjunction with mechanized underhand cut-and-fill mining methods has reduced the number of injuries and fatalities caused by mining in deep, high-stress ground conditions, greatly improving the … stuart adamson biography