Sustainability and Tailings Management in the Mining Industry:  Paste Technology

Yilmaz, Erol; Yılmaz, Emin

doi:10.22531/muglajsci.383095

Cited by 10 publications

(6 citation statements)

References 26 publications

(23 reference statements)

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“…Binders account for approximately 75% of the total cost of CPB [22,23]. Increasing the binder content can enhance the mechanical properties of CPB, but it will result in higher costs [24][25][26]. Further, cement clinker production is associated with high carbon dioxide emissions [27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Experimental Development of an Innovative Approach to Enhance the Strength of Early Age Cemented Paste Backfill: A Preliminary Investigation of Microwave-Assisted Curing

Hefni

2023

Minerals

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In underground mining, the application of mine backfill has evolved into a standard practice. Mine backfill typically consists of tailings, water, and hydraulic binders. However, the high cost of binders has prompted scholars to research alternatives to reduce this cost while maintaining or even improving the properties of the backfill. One potential alternative is leveraging microwave irradiation. In this study, an innovative approach was developed to increase the unconfined compressive strength (UCS) of early age cemented paste backfill (CPB). Microwave treatment was applied to CPB samples at various curing ages for varying durations. The UCS and ultrasonic pulse velocities were measured and analyzed in an experiment with a full factorial design. Moreover, the microstructural properties of the CPB were investigated using mercury intrusion porosimetry. The results indicate a significant potential to increase the UCS of CPB by up to 25% when microwave-treating samples for 8 min after 7 days of curing. This approach could shorten mining cycle times and improve productivity, presenting a promising method to enhance CPB strength.

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Section: Introductionmentioning

confidence: 99%

Experimental Development of an Innovative Approach to Enhance the Strength of Early Age Cemented Paste Backfill: A Preliminary Investigation of Microwave-Assisted Curing

Hefni

2023

Minerals

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“…As an environmentally friendly mining method, the filling mining method can improve resource recovery rate, control rock migration and surface subsidence, treat solid waste accumulation, improve stope environment and prolong mine service life so as to reduce the influence and damage of resource mining on natural, social and living environment [ 1 , 2 , 3 , 4 , 5 , 6 ]. The technology has been successfully applied in various engineering environments in many countries [ 7 , 8 , 9 ]. The Yushenfu mining area in northern Shaanxi is located at western China’s edge of the Maowusu Desert.…”

Section: Introductionmentioning

confidence: 99%

The Experimental Investigation on Mechanics and Damage Characteristics of the Aeolian Sand Paste-like Backfill Materials Based on Acoustic Emission

Shao

Tian

et al. 2022

Materials

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With the wide application of the filling mining method, it is necessary to consider the influence of rock activity on the filling body, reflected in the laboratory, that is, the influence of loading rate. Therefore, to explore the response characteristics of loading rate on the mechanical and damage characteristics of aeolian sand paste filling body, DNS100 electronic universal testing machine and DS5-16B acoustic emission (AE) monitoring system were used to monitor the stress–strain changes and AE characteristic parameters changes of aeolian sand paste filling body during uniaxial compression, and the theoretical model of filling sample damage considering loading rate was established based on AE parameters. The experimental results show that: (1) With the increase in loading rate, the uniaxial compressive strength and elastic modulus of aeolian sand paste-like materials (ASPM) specimens are significantly improved. ASPM specimens have ductile failure characteristics, and the failure mode is unidirectional shear failure → tensile failure → bidirectional shear failure. (2) When the loading rate is low, the AE event points of ASPM specimens are more dispersed, and the large energy points are less. At high loading rates, the AE large energy events are more concentrated in the upper part, and the lower part is more distributed. (3) The proportion of the initial active stage is negatively correlated with the loading rate, and the proportion of the active stage is positively correlated with the loading rate. The total number of AE cumulative ringing decreases with the increase in loading rate. (4) Taking time as an intermediate variable, the coupling relationship between ASPM strain considering loading rate and the AE cumulative ringing count is constructed, and the damage and stress coupling model of ASPM specimen considering loading rate is further deduced. Comparing the theoretical model with the experimental results shows that the model can effectively reflect the damage evolution process of ASPM specimens during loading, especially at high loading rates. The research results have significant reference value for subsequent strength design of filling material, selection of laboratory loading rate and quality monitoring, and early warning of filling body in goaf.

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“…Many types of researches indicated that the loading rate has a significant effect on the properties of materials. Different materials such as rock, concrete, and backfill exhibit different behaviors under different loading rates [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Ae-Based Failure Warning Mechanism During Cemented Paste Backfilling: Experimental Investigation

Wang

et al. 2022

E3S Web Conf.

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To research the AE warning mechanism of cemented paste backfilling (CPB), the uniaxial compression test with AE monitoring was carried out on CPB. The effects of different moisture content, cement proportion, and loading rate on AE characteristics of CPB were analyzed. And a damage model based on AE is established. The results show that the increase of water content, gypsum content, and loading rate can enhance the ductility of CPB and lengthen the AE warning area. However, the increase of moisture content will lead to the delay of AE signal peak, which is bad for the early warning. With the increase of loading rate, the failure mode of specimens gradually changes from splitting failure to shear failure. The cracks produced under different failure modes can correspond to the peaks of AE signals. The damage model based on AE shows that the damage process of CPB samples can be divided into three stages, linear-exponential-linear. The experimental results can further research the optimal conditions for ae monitoring of backfill, and provide a theoretical basis for ae monitoring and warning of backfill.

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Sustainability and Tailings Management in the Mining Industry: Paste Technology

Abstract: In this study, the basic principles of paste technology which has been implemented successfully in the mining industry for both waste volume reduction and environmental impact reduction were investigated.

Cited by 10 publications

References 26 publications

Experimental Development of an Innovative Approach to Enhance the Strength of Early Age Cemented Paste Backfill: A Preliminary Investigation of Microwave-Assisted Curing

Experimental Development of an Innovative Approach to Enhance the Strength of Early Age Cemented Paste Backfill: A Preliminary Investigation of Microwave-Assisted Curing

The Experimental Investigation on Mechanics and Damage Characteristics of the Aeolian Sand Paste-like Backfill Materials Based on Acoustic Emission

Ae-Based Failure Warning Mechanism During Cemented Paste Backfilling: Experimental Investigation

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