Empirical Approach Based Estimation of Charge Factor and Dimensional Parameters in Underground Blasting

Himanshu, Vivek Kumar; Roy, Moumita; Shankar, Ravi; Mishra, A. K.; Singh, Premlata

doi:10.1007/s42461-020-00374-8

Cited by 9 publications

(3 citation statements)

References 8 publications

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“…The appropriate blasting method should be selected based on the burial depth of the deposit [129]. For shallow deposits, either drilling-blasting [130] or chamber-blasting [131] methods can be employed. Usually, drilling blasting is preferable for shallow-buried thick deposits due to its more pronounced cost-effectiveness [132].…”

Section: Permeability Modification Technique For In Situ Leachingmentioning

confidence: 99%

A Review of In Situ Leaching (ISL) for Uranium Mining

Li,

Yao

2024

Mining

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Uranium, a cornerstone for nuclear energy, facilitates a clean and efficient energy conversion. In the era of global clean energy initiatives, uranium resources have emerged as a vital component for achieving sustainability and clean power. To fulfill the escalating demand for clean energy, continual advancements in uranium mining technologies are imperative. Currently, established uranium mining methods encompass open-pit mining, underground mining, and in situ leaching (ISL). Notably, in situ leaching stands out due to its environmental friendliness, efficient extraction, and cost-effectiveness. Moreover, it unlocks the potential of extracting uranium from previously challenging low-grade sandstone-hosted deposits, presenting novel opportunities for uranium mining. This comprehensive review systematically classifies and analyzes various in situ leaching techniques, exploring their core principles, suitability, technological advancements, and practical implementations. Building on this foundation, it identifies the challenges faced by in situ leaching and proposes future improvement strategies. This study offers valuable insights into the sustainable advancement of in situ leaching technologies in uranium mining, propelling scientific research and practical applications in the field.

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Section: Permeability Modification Technique For In Situ Leachingmentioning

confidence: 99%

A Review of In Situ Leaching (ISL) for Uranium Mining

Li,

Yao

2024

Mining

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“…The Kuz-Ram equation [34] is the most common empirical model for assessing surface blasting [43]. It evaluates blast fragmentation using design parametersexplosive characteristics, blast geometry, amount of explosive used, and rock factors.…”

Section: Kuz-ram Estimation Of 50% Passingmentioning

confidence: 99%

Blasting efficiency in granite aggregate quarry based on the combined effects of fragmentation and weighted environmental hazards

Shehu¹,

Yusuf²,

Zabidi³

et al. 2023

Min. miner. depos.

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Purpose. Mine and quarry operators determine blasting efficiency by the sizes of fragments, while regulatory agencies evaluate the same from the level of environmental discomfort. Thus, a conflict of interest exists. This research distinguishes fragmentation efficiency from blasting efficiency. It proposes a new approach for evaluating blasting efficiency to break the conflict of interests between the quarry operators and the regulatory agencies. Methods. Five blasting events in the FYS granite aggregate quarry have been studied, and design parameters have been obtained. As an indicator of blast-induced environmental discomfort, vibrations and air blasts are measured using a seismograph. The WipFrag desktop and Kuz-Ram model are used to assess the resulting fragmentations. Blasting efficiency is evaluated as a function of fragmentation and environmental constraints. Findings. The powder factor affects the fragment size distribution and the environmental hazards of blasting but in a conflicting manner. Increased powder factor enhances good fragmentation but results in further environmental discomfort. Blast event 4 has the highest fragmentation efficiency of 46.53%, while 3 has the highest environmental control efficiency of 69.47%. Cumulatively, blast event 4 has the highest overall blasting efficiency of 45.43%. Future research is expected to standardise this novel approach and incorporate more blasting effects. Originality. This work is the first attempt to quantify the efficiency of blasting operations in the aggregate quarry by combining the fragmentation produced and the resulting environmental hazards in a single model. Practical implications. The model proposed in this research can be adopted by quarry operators and regulatory agencies for sustainable quarrying and mining to address identified conflicts of interest between them.

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“…The charging quantity, quality along with blast design parameter impacts the fragmentation from a rock blasting operation. Himanshu et al (2021) have computed the optimal dimensional parameters for underground blast using empirical rock fragmentation models. The excess scattering in the delay detonators have major influence on the profile of breakage in the face blast.…”

Section: Introductionmentioning

confidence: 99%

Explicit dynamics based numerical simulation approach for assessment of impact of relief hole on blast induced deformation pattern in an underground face blast

Himanshu

Mishra

Vishwakarma

et al. 2021

Geomech. Geophys. Geo-energ. Geo-resour.

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The breakage of rock mass by blasting has many challenges. The optimal breakage in an underground development face/tunnel blast is dominantly dependent on the relief area provided to the blast holes. The cut portion in the burn cut face blast is significantly important to achieve the controlled deformation due to the blast. This paper has discussed the impact of the number and diameter of the relief holes on the breakage pattern of the rock. The numerical simulation with varying numbers and diameter of relief hole was carried out for this purpose.Finite element modeller explicit dynamics of Ansys-Autodyn was used for the simulation work. The isosurface of non-deformed zone was plotted to compare the extent of deformation under varying conditions of relief holes.The analysis shows that the higher number of relief holes with optimum diameter gives more controlled deformation than single relief hole with larger diameter. The nearfield vibration was also recorded by placement of seismograph. The waveform analysis of the recorded vibration was carried out. The redesigning of the blasting pattern was done using the results of numerical simulation and waveform analysis. The redesigned pattern consists of four relief holes of 115 mm diameter. The blasting output with the revised design has resulted into the considerable improvements in the pull and reduction of overbreak. The revised pattern has addressed the issue of the socket formation at the site.

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Empirical Approach Based Estimation of Charge Factor and Dimensional Parameters in Underground Blasting

Cited by 9 publications

References 8 publications

A Review of In Situ Leaching (ISL) for Uranium Mining

A Review of In Situ Leaching (ISL) for Uranium Mining

Blasting efficiency in granite aggregate quarry based on the combined effects of fragmentation and weighted environmental hazards

Explicit dynamics based numerical simulation approach for assessment of impact of relief hole on blast induced deformation pattern in an underground face blast

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