Placing waste back underground as backfill cannot be used to dispose of all the tailings produced, and some surface disposal is usually still required.
The use of tailings in backfill has many potential advantages for underground mines, such as:
Significant cost savings in the development of a paste backfill solution can be achieved through the design of an automated plant to be controlled from the mill control room.
The control equipment displayed in the control room allows the operator to monitor backfill flow on a continual basis thereby minimising the potential for failures associated with the flow.
The objective of this study is to evaluate the potential use of SB backfills amended with polyanionic cellulose (PAC), and for cost effectiveness and low-carbon consideration, the PAC dosage for PAC-amended SB backfills (PSB) is optimized, which may be an alternative for conventional SB backfills to improve the hydraulic performance when exposed to contaminated solutions.
The backfills comprised powered conventional bentonites (CB), fine sand, and PAC.
Although mining works were continuously accompanied by backfilling of dug out areas during the mine's entire operation, the backfills were so deformable that they were unable to prevent surface subsidence.
More than five centuries of mining activity in the area below the town of Idrija have caused major changes in the stress strain states of rocks and backfills in the affected areas of the mercury mine.
[FLAC.sup.3D] is used for numerical simulation to analyze the state characteristics and stress and strain of backfills and surrounding rocks and to optimize the backfills.
Making Backfills. The mine has a long history of mining, and many tailings have been produced during the mining process.
Caption: Figure 4: X-ray diffraction of the cemented backfill
bodies at 360 d.
Therefore, it is of great significance to comprehensively analyze the stability and evaluate the confidence level of backfill
mining under primary HSRS.