An Experimental Study on the Mechanical Properties of Cemented Rock-Tailings Fill

2014 ◽  
Vol 941-944 ◽  
pp. 2611-2619
Author(s):  
Li Jie Guo ◽  
Ke Ping Zhou ◽  
Xiao Cong Yang ◽  
Guang Sheng Liu ◽  
Wen Yuan Xu
Keyword(s):  
Experimental Study ◽  
Compressive Strength ◽  
Mine Waste ◽  
Waste Rock ◽  
Mill Tailings ◽  
Mix Proportion ◽  
Study Results ◽  
Mine Waste Rock ◽  
Materials Used ◽  
Mine Development

This paper outlines an effective approach to making composite backfill using mine waste material. Composite materials are widely used in many areas of engineering because of their unique structural properties. Cemented rock-tailings are one of the most prevalent materials used for composite backfill because they can effectively make use of mine waste rock and mill tailings that would otherwise be simply considered waste. This backfill method has the capability of maintaining the mine environment while still allowing for continued mine development. An experimental study is being conducted in a cooperative mine research project to investigate the properties of backfill material and specifically the mechanical characteristics of cemented waste rock-tailings fill. This study details the characteristics of the composite backfill aggregate with respect to the compressive strength of the cemented rock-tailings fill and the backfill mix-proportion, as well as outlines a new method of study for cemented rock-tailings fill mechanics. The study results show the compressive strength of cemented rock-tailings fill is dependent mainly on the cement and waste rock content. Ensuring a precise backfill mix proportion can effectively reduce the cement dosage, thereby decreasing the backfill cost realized for the mine.

scholarly journals Revaluing mine waste rock for carbon capture and storage

2010 ◽  
Vol 24 (1) ◽  
pp. 64-79 ◽  
Author(s):  
Michael Hitch ◽  
Sheila M. Ballantyne ◽  
Sarah R. Hindle
Keyword(s):  
Carbon Capture ◽  
Mine Waste ◽  
Carbon Capture And Storage ◽  
Waste Rock ◽  
Mine Waste Rock ◽  
And Storage

Combined DC resistivity and induced polarization (DC-IP) for mapping the internal composition of a mine waste rock pile in Nova Scotia, Canada

2018 ◽  
Vol 150 ◽  
pp. 40-51 ◽  
Author(s):  
Christopher Power ◽  
Panagiotis Tsourlos ◽  
Murugan Ramasamy ◽  
Aristeidis Nivorlis ◽  
Martin Mkandawire
Keyword(s):  
Nova Scotia ◽  
Mine Waste ◽  
Induced Polarization ◽  
Waste Rock ◽  
Dc Resistivity ◽  
Rock Pile ◽  
Waste Rock Pile ◽  
Mine Waste Rock

scholarly journals Platinum Mine Workers’ Exposure to Dust Particles Emitted at Mine Waste Rock Crusher Plants in Limpopo, South Africa

2020 ◽  
Vol 17 (2) ◽  
pp. 655
Author(s):  
Maasago M. Sepadi ◽  
Martha Chadyiwa ◽  
Vusumuzi Nkosi
Keyword(s):  
South Africa ◽  
Mine Waste ◽  
Waste Rock ◽  
Dust Exposure ◽  
Dust Particles ◽  
Hazardous Substance ◽  
Significant Difference ◽  
Mine Waste Rock ◽  
Rock Crusher ◽  
Mine Workers

The South African mining industry is one of the largest producers of platinum (Pt) in the world. Workers in this industry are exposed to significant amounts of dust, and this dust consists of particles sizes that can penetrate deep inside the respiratory region. A cross-sectional study was conducted to evaluate dust exposure risk at two Pt mine waste rock crusher plants (Facility A and B) in Limpopo, South Africa. Workers’ demographic and occupational information was collected through a structured questionnaire, a walk-through observation on facilities’ processes, and static dust sampling for the collection of inhalable and respirable dust particles using the National Institute for Occupational Safety and Health (NIOH) 7602 and the Methods for Determination of Hazardous Substance (MDHS) 14/4 as guidelines. Only 79% of Pt mine workers, used their respiratory protective equipment (RPE), sixty-five percent were exposed to work shifts exceeding the recommended eight hours and 8.8% had been employed for more than ten years. The mean time-weighted average (TWA) dust concentrations between Facility A and B showed a significant difference (p < 0.026). The Pt mine’s inhalable concentrations (range 0.03–2.2 mg/m3) were higher than the respirable concentrations (range 0.02–0.7 mg/m3), however were all below the respective international and local occupational exposure limits (OELs). The Pt mine’s respirable crystalline silica (SiO2) quartz levels were all found below the detectable limit (<0.01 mg/m3). The Pt miners had increased health risks due to accumulated low levels of dust exposure and lack of usage of RPE. It is recommended that an improved dust control program be put in place which includes, but is not limited to, stockpile enclosures, tire stops with water sprays, and education on the importance of RPE usage.

Analysis of Influence Factors on Heavy Metal Release from Mine Waste Rock in Fu Xin Mine Area

2010 ◽  
Vol 29-32 ◽  
pp. 2570-2575
Author(s):  
Bing Liang ◽  
Li Guo Jiang ◽  
Xiu Sheng Lu
Keyword(s):  
Heavy Metal ◽  
Ph Value ◽  
Mine Waste ◽  
Influence Factors ◽  
Waste Rock ◽  
Metal Release ◽  
Mine Waste Rock ◽  
Leaching Solution ◽  
Heavy Metal Elements ◽  
Heavy Metal Release

For analysis of influence factors on heavy metal release from different weathering mine waste rock in Fu Xin mine area under the effect of rain water leaching, the materials which come from mine waste rock pile nearby Xin Qiu mine is collected and then process a serial leaching experiments. The initial PH value of leaching solution and experiment temperature have been selected to as influencing factors according to rainfall and weather condition of Fuxin mining area. The concentration of five heavy metal elements: Cd, Cr, Cu, Mn and Pb are tested in leaching solutions. The results show that the constituent characteristics of stratum rock is a major factor influenced on leaching solutions and heavy metal release. The weakly acidic leaching solution becomes to weakly alkaline after leaching the waste rock. The quantities of different heavy metal release represent disparate rules, influenced by distinct weathering degree. Concentrations of Cd and Cr increase with the leaching solution's pH value variation while Cu, Mn and Pb decreased. Higher temperature leads more heavy metal elements release from the waste rock.

Emergency remediation of instability at Caudalosa tailings dam, Peru: a case history

2002 ◽  
Vol 39 (5) ◽  
pp. 1193-1200 ◽  
Author(s):  
Vinod K Garga ◽  
Miguel de la Torre
Keyword(s):  
Case History ◽  
Large Deformations ◽  
Mine Waste ◽  
Waste Rock ◽  
Tailings Dam ◽  
Plastic Clay ◽  
Mine Waste Rock ◽  
Emergency Stabilization ◽  
Subsurface Investigations ◽  
Visual Observations

This paper describes the instability in the foundation of the Caudalosa tailings dam in Peru. The instability threatened collapse of the structure along with the risk of unacceptable contamination of the River Escalera, located immediately downstream of the toe of the dam. At the time of these investigations, large deformations were in progress. The head scarp of the potential slide, located in the stored tailings, had reached a height of 2 m. Visual observations, as well as subsurface investigations, indicated that the instability was due to the presence of soft to medium plastic clay in the foundation. Emergency stabilization was successfully achieved by the construction of large trenches at the downstream toe, allowing the low consistency clay to be removed and backfilled with compacted mine waste rock. Other secondary stabilizing measures that were undertaken are also described.Key words: clay, dam, instability, remediation, stabilization, slide, tailings.

Sign in / Sign up

Export Citation Format

Share Document