Received 13 October 2019; received in revised form 28 December 2019; accepted 29 December 2019 Keywords Blasting cost Limestone mines Gene expression programming Non-linear multivariate regression Artificial neural networks Modeling Abstract The use of blasting cost (BC) prediction to achieve optimal fragmentation is necessary in order to ...
The ranges of PM10 concentrations at mine A and B were 0.267-5.592 and 0.130-0.325 mg/m³, respectively, and the concentration at blasting from mine A was significantly higher than mine B (p < 0.05).
This paper presents a comprehensive study on the numerical and experimental simulation of smooth blasting in limestone. The calibration of the numerical model was initiated through Brazilian and uniaxial compression tests on limestone samples. Compressive strength and Brazilian tensile strength of limestone were 70 …
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Download Table | Blasting pattern specifications of limestone mines. from publication: A comparative study on the application of various artificial neural networks to simultaneous prediction of ...
This process can be roughly divided into the following stages: 1. Exploration and Planning. Before mining limestone, the mining area must be explored in detail to understand the distribution, quality and reserves of the ore. Based on the exploration results, miners will develop a reasonable mining plan to ensure efficient and orderly …
The mining process involves several sequential stages, including drilling, blasting, loading, transportation, and mineral processing. Among these stages, blasting costs (BC) exhibit greater sensitivity compared to others. Inadequate blasting practices can lead to additional drilling, increased explosive consumption, and environmental consequences …
Blast Furnace Slag. GGBFS | GBFS. Petrochemicals. Polyethylene. Polystyrene. Urea. Methanol. List of all products ... Limestone as one of the oldest minerals due to its very enduring geological evolution possesses different forms in nature and exhibits different colors. ... Way No. 4229, Al Azaiba Street, Muscat, Oman. WhatsApp: +96898254446 ...
The type of stemming material used in blasting has great influence on the utilization of blasting energy. 7 Drill cuttings, wet clay, fly ash-clay mixture, sand clay mixture and other materials have been used in open-pit blasting stemming operations. 8 In the process of drilling in open-pit mines, the highspeed rotating drill continuously cuts ...
We specialize on application of high explosives for normal and controlled blasting and also specialize in the mining, crushing and screening of Gypsum and limestone, and …
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Firing sequence of blastholes in blasting is an inherent part of the blast design for various reasons that range from the spatial requirements to the control of throw during blasting in surface mines. Despite several such patterns in vogue, role of firing sequences in defining the size of fragmented block sizes is not properly understood. The …
Examination of blasting accident trends shows 4.75 fatalities per year for the period 1990--1993, close to the previous two 4-year periods and a slight decrease compared to the entire previous 12-year history, which represents a real reduction in blasting injuries. Over 4 billion pounds of commercial explosives are used by the US …
Except for very deep-seated deposits, open cast mining method has been recognized as the safest and most productive mode for mining minerals. Ever growing demand in minerals and coal has compelled the mine operators to increase the size of mine, which has resulted in an increasing trend towards large capacity open cast …
Mines high-purity limestone for the steel and cement industries across the Middle East and Asia. Why GP Group invested. GP Group started looking to build its limestone activities outside of Thailand and partnered with the Al Rawas family in Oman to secure a one billion tonne reserve of very high quality limestone (about 98% calcium carbonate). ...
Except for very deep-seated deposits, open cast mining method has been recognized as the safest and most productive mode for mining minerals. Ever growing …
Blasting is a process of reduction of rocks or hard soil into fragments with the help of explosives. The blasting operation includes drilling of holes, installing a detonator and charge, detonating the change, and removing of broken material. How many explosives can be fired at a time in blasting?
The first process takes place at limestone mines where the mined ore undergo crushing and screening for the separation of the different size fractions of the ore. ... in hammer crushers before mixing it in the sinter mix. In case of direct feed to blast furnace, limestone lumps of 10 mm to 40 mm size are used. In case of limestone …
Blasting is the process, where explosives are used to fragment the rock mass, so that loading equipment can handle the fragmented rocks. The main objective …
blasting services with its own personnel comprising of two to three mining engineers one of whom is the blaster in charge, and seven helpers. Majan mining company on the other hand provides about eight staff to aid in the blasting activities comprising a foreman and helpers, altogether they form an allmale blasting crew. Blasting is
The blast vibrations were studied in the soil of quaternary sediments and in Ordovician limestone in mining area. The measurements were performed by seismograph DS-277 Blast-Mate Series II of ...
The optimization of blasting operations greatly benefits from the prediction of rock fragmentation. The main factors that affect fragmentation are rock mass characteristics, blast geometry, and explosive properties. This paper is a step towards the implementation of machine learning and deep learning algorithms for predicting the …
Under well-controlled conditions, Ouchterlony et al. [] assessed energy partitioning of limestone production blasts and computed in-hole losses, seismic energy, the kinetic energy of throw, and fragmentation energy.Their search revealed the energy partitioning of a blast with bulk emulsion explosive would be []Crushing and other losses …
Global Mining Company LLC has a concession area located in the southern part of the Sultanate of Oman, in Manji, which is three hundred kilometers north-east of Salalah. …
Blasting activities at Majan Mining involved mostly bench blasting, though often with overburden and development blasting for haul roads and trenches. No guidelines define …
The method is broadly identified as a process of cracking and reducing the rock into fragments using suitable quantity of explosives. ... Mishra, A.K., Roy, M.P. et al. Influence of Joint Orientation and Spacing on Induced Rock Mass Damage due to Blasting in Limestone Mines. Mining, Metallurgy & Exploration 40, 2349–2359 (2023). …
Blasting prediction and parameter optimization can effectively improve blasting effectiveness and control production energy consumption. However, the presence of multiple factors and diverse effects in open-pit blasting increases the difficulty of effective prediction and optimization. Therefore, this study takes blasting fragmentation …
Blasting is done twice a week, routinely starting as early as 6.30 am with a range of 190-400 holes per blast. The blasting activity normally lasts for about 4 hours. Approach. Blasting activities at Majan Mining involved …
LLC, Sultanate of Oman based company established in the year 2007. Company engaged in mining and mineral processing activities and aimed to fulfil the needs of customers within Oman and GCC countries. NMC is now emerged as a major manufacturer and supplier of various products like limestone grade, marble grade & allied products, Chrome etc ...
A comprehensive analysis of blasting data of opencast mines has been conducted for variations in basic design parameters like burden, spacing, stemming and …
Deep-hole bench blasting is the primary method for aggregate extraction in mines. However, factors such as complex geological conditions and suboptimal blasting parameters often result in uneven ...
In this study, we investigated the impact of quarrying as an environmental ethical crisis. The need for the study arose when we realised the deteriorating effect of the quality of life in our community, which is located next to a limestone quarry. To obtain a deeper understanding of the adverse impact on the environment and the quality of life of …
This study explored the ergonomics associated with blasting activities at Majan Limestone quarry. The remoteness, altitude and severe weather conditions made blasting activities unwieldy ...
Analysis of many operations suggests that although mine blasts generally fragment rock so that it can be handled by the mining process, there is potential optimal fragmentation to improve the productivity and cost of all downstream processes (Bozic, 1998). ... Drilling and Blasting analysis. At Songwe II limestone quarry there was an ...