A review on different methods of activating tailings to improve their cementitious property as cemented paste and reusability ... A comprehensive critical review about mine tailings reuse in concrete industry was conducted. ... Investigation of Hydraulic Activity of Ground Granulated Blast Furnace Slag in Concrete, vol. 33 (2003), …
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Mathematics 2022, 10, 4140 3 of 22 103 to 107 and a magnesium oxide (MgO) value below 2.5%. Therefore, blending of raw materials from the different parts of the limestone mine is necessary and the ...
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One of the inseparable parts of mining activities is blasting which one of its important outcomes is fragmentation. Fragmentation is the first result of blasting that is directly related to the mining costs. There are various methods for determining the degree of fragmentation which are divided into two groups, direct and indirect methods. Among …
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A principal component analysis method developed in XLSAT 2018 has been performed on various blast design parameters to illustrate the relation between blasting and rock parameter.
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This paper presents a case study of controlled blasting at a limestone mine. In the phase of expansion of cement plant a highly controlled blasting has to be done so no harm and damage occurs to the nearby green structure. MINE LOCATION The mine has a spread of 444.763 ha comprising mainly plain terrain lying outside forest area.
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MINING AND PROCESSING: Iron ore mining can be broadly categorized into two methods: manual mining, which is employed in small mines, and mechanized mining, which is suitable for large iron ore mines. Manual mining is typically limited to float ores and small-scale operations. Reef ore mining is also conducted manually on a small scale.
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Most blasting limits are based on a U.S. Bureau of Mines (USBM) report called RI 8507. The study established safe, science-based limits to prevent damage to even the most susceptible building materials.
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2.2 Mining Limestone Using Surface Mining Methods 19 2.2.1 Excavation Methods The following are four applicable methods of the surface mining of limestone. 1. Conventional method 2. Surface and continuous miners 3. Ripping and dozing 4. Rock breaking by breaker. Conventional methods of mining include drilling, blasting, …
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2.1 Experimental method. The Brazilian test and the uniaxial compressive strength test were both used to determine the basic mechanical parameters of the limestone specimens, which were collected at the test site of a limestone mine (Fig. 1).The limestone in the mining region is solid and durable, has not cracked yet, and …
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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).
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So far as India, the second-largest producer of cement, is concerned, the mineral production statistics of the Indian Bureau of Mines (7), the apex body dealing with mines and minerals in the country, showed that the pro-duction of limestone from April, 2014 to March, 2015 was 293 million metric tons, although the total cement-grade limestone ...
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Impacts of limestone mining on the environment are manifold. Mining leads to landscape deformation and ecosystem destruction, which changes in groundwater …
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Mohammadnejad et al. (2012) employed SVM models to predict the blast-induced PPV from two limestone mines, considering 26 blast instances, 40% of which were used to validate and test the model ...
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1 Introduction. Deep-hole bench blasting is currently the primary method for aggregate extraction in mines. However, during the process of aggregate extraction, issues such as uneven rock fragmentation and high fines content often arise due to the complex geological conditions and suboptimal blasting process parameters (Roy et al., …
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Using TOPSIS method, the present study tries to investigate the blasting operation in the Tajareh limestone mine and select the most appropriate blasting pattern.
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This paper presents a case study of limestone mine where a controlled blasting was conducted near a green structure of wagon tippler (at 2 m) being constructed for foundation work of belt conveyor as the mine …
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cement plant capacities, limestone quality of plant feed, and various operational requirements. Although, several approaches to the mine scheduling problem have appeared in the literature including heuristics by Gershon [8], Lagrangian relaxation by Caccetta et al. [9], parametric methods
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Cement - Extraction, Processing, Manufacturing: Raw materials employed in the manufacture of cement are extracted by quarrying in the case of hard rocks such as limestones, slates, and some shales, with the aid of blasting when necessary. Some deposits are mined by underground methods. Softer rocks such as chalk and clay can …
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the blasting-induced ground vibration using the ANNs model, experimental methods, and 68 blasting data in an open-pit mine in Vietnam. In this study, five models with different numbers of neurons and different hidden layers were developed. Finally, the 1-5-8-10-2 ANNs model with three hidden layers (compared to the other
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SURFACE LIMESTONE MINING: All over the world, limestone is generally mined from a quarry or through open-pit mining. This method is the easiest way to remove limestone without causing much destruction. In surface mining or open-pit mining, the topsoil and overburden covering the mineral are removed.
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In addition, Wirtgen surface miners are extremely environmentally friendly compared to conventional drilling and blasting methods. Vibration-free mining without drilling and blasting significantly reduces the amount of dust and noise produced. The 2500 SM Vario used in Ube was specially modified for the customer to meet these requirements.
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a limestone mine of Adhunik Cement Limited at Jaintia Hills in Meghalaya state of India. An air-decking column of 1 m length wooden spacer was used in each blast hole. The method was proved well ...
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This paper presents a case study of controlled blasting at a limestone mine. In the phase of expansion of cement plant a highly controlled blasting has to be done so no harm …
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for controlled blasting in open pit mines, they also offer great flexibility to production blasts (Dent, 1994; Kay, 2000, Mckinstry et al. 2002; Chavez and Chantry, 2003, Grobler, 2003; Mishra and Gupta 2012). This paper presents a case study of controlled blasting at a limestone mine. In the phase of expansion of cement plant a highly controlled
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The rock excavation practice incorporates proper drilling and blasting as one of the most significant aspects. However, the generation of uncontrolled cracks and micro-cracks in post-blast opening geometry are some of the major disadvantages of drilling and blasting (Singh et al. 2014, 2015). Geological discontinuities are an integral part of rock …
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The most widely adopted method of limestone mining is through opencast pits with bench formation. Limestone mining causes …
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Drilling and blasting are used to mine approximately 0.5 Mt/y of run of mine (ROM) although this quantity can change depending on the market demand. Only one blast is loaded at a time during one working shift. Each blasting process is carried out with three rows of blastholes drilled in a staggered pattern of 2.5 m × 3 m. The blastholes were ...
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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 …
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Ground vibration is one of the most unfavourable environmental effects of blasting activities, which can cause serious damage to neighboring homes and structures. As a result, effective …
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Blast holes are drilled using drilling machines according to the desired length, diameter, spacing, and geometric features. The typical Drill depth and Diameters are: Drill depth: max. 25m. Drill diameter: 80-165mm. Blasting is the most widely used method to excavate limestone for cement production as the rock is usually too hard to be ripped ...
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This note is a brief compilation of the paper entitled "An economic way of conducting optimum blasts in limestone mines" which was submitted for publication in The Mining Engineering Journal, USA.
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Mining leads to landscape deformation and ecosystem destruction, which changes in groundwater regimes, dust and noise generation, during various mining operations like …
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Two of the most common are owning and operating a limestone quarry or quarries, as a part of a cement producer's operations, or purchasing limestone from a separate limestone mining company. Regardless of how a cement producer acquires limestone, they are now facing increased concerns from the public and regulators …
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To predict rock fragmentation due to blasting in limestone quarry mines, both machine learning models (Random Forest Regression (Bagging), Support Vector Regression, and XG Boost Regression...
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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 …
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Over the years, various models have been developed in the stages of the mining process that have allowed predicting and enhancing results, but it is the breakage, the variable that connects all the activities of the mining process from the point of view of costs (drilling, blasting, loading, hauling, crushing and grinding).
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Thus, the predictive capacities of three artificial intelligence algorithms, backpropagation neural network (BPNN), ELM, and GPR, are investigated in this study using blasting data from a quarry (Ras Limestone Mine of Shree Cement) in India to …
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Limestone comes in many different varieties. Chalk is a very fine grained, porous marine limestone composed almost entirely of microscopic fossils. Travertine is a freshwater sedimentary limestone that has very thin, crenu-lated layers and is commonly formed at springs. Marble is a carbonate rock, usually a marine limestone, that has been
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