Browse

"Just in blast - VR training" is a student project, the main idea of which was to create a VR (Virtual Reality) training in blasting technology. The footage was recorded on the site of the Holcim Dolomite Mine "Radkowice" in cooperation with SSE Poland in the summer of 2023, with 360-degree wide-angle cameras. The acquired material was then properly selected and edited for further activities, which ultimately led to the editing and creation of an application in VR extension. The whole project is aimed at populariz...

Aggregate is one of the essential components of artificial structures. Aggregate is obtained by mining, as is the case with mineral raw materials. The output of aggregate mining is, in addition to the main product, also a secondary one - sludge. Sludge is an integral part of the wet processing of the most minor aggregate fractions. The amount of sludge in quarries is increasing, while the task of sludge management is to find a purpose for it and thus utilize it. Sludge management methods must consider the most neg...

Mining activities are carried out employing a variety of machineries and equipment; in many cases these can generate relevant health problems for workers. One of the biggest hazards for workers is noise, since prolonged exposure to a noise source could cause damage through long-term exposure. Various researchers pointed out that the damage that can be generated by exposure to noise is of various types with sometimes very serious consequences. Specially drivers of particular vehicles of the mining sector, such as d...

The explosions produced in industrial/chemical facilities, such as hazardous material storage facilities, are events with low probability but high destructive potential. When occurring in a densely populated area, such explosions can lead to extensive damage of nearby buildings or infrastructures, resulting in high economic costs and human injuries and fatalities. The explosions may be the result of an accident but may also be intentional. As the pressure released by the external explosions decreases exponentially...

The paper presents a theoretical and practical approach to the concept of risk assessment specific for the demolition of the industrial civil objectives with the help of explosives in terms of ensuring security premises for the effects generated following the blasting demolition work of this type of constructions. Blasting realization of industrial civil objectives to be demolished involves a series of operations that generate health and safety risks to economic operator employees which are carrying out work and f...

The climate, energy, and health crises, alongside the conflict events in Eastern Europe, have generated new directions regarding the perspectives of global and national energy transition, by orienting it towards a decarbonized economy. The increased frequency of climate change-related weather events affects the availability of renewable energy sources (wind and solar) and energy supply security. The abandonment of fossil fuel-based electricity and heat due to commitments and objectives established in the United Na...

On the territory of Romania, there are large salt deposits grouped on either side of the Carpathian mountains. Made up of over 300 large salt deposits covering an area of about 30,000 km2. The Trotus mine within the Targu Ocna Saltworks Branch was opened and put into operation in 1971, with the objective of dry salt exploitation, using the mining method with small chambers and abandoned square pillars, with a vaulted ceiling. Currently, Salina Trotu? has 14 horizons: 2 at the level of the Pilot mine and 12 at the ...

In the last decade, at the global level, most countries have emphasized the reduction of energy consumption produced with the help of solid fuels, trying to reduce the volume of greenhouse gases and polluting gases by identifying new sources and methods of energy production that have a low effect on the environment and people. Romania is preparing to ensure energy security by producing electricity from renewable sources. Romania's medium- and long-term strategy will be influenced by the European Green Pact, which ...

Transport by mine hoisting equipment is used to remove excavated materials, deliver materials, machinery, and equipment required for the mining process and related activities, as well as transport persons. These technological devices use transport containers to pull the load in the form of a skip, cage, or skip-cage from underground to the surface. Mining machines are intended for vertical and inclined pits. Scientific research discussed in the present article focuses on the transport capacity of the mine hoisting...

This paper refers on the outcomes of an experimental study developed in an industrial plant in the centre of Italy in which dust emission represents an important annoyance affecting the whole activity and so requiring to be managed in order to guarantee legal compliance but, above all, a safe workplace. This case study consists in the assessment of the efficacy of different reduction measures designed to avoid and, where not possible, to reduce dust emissions from stockpiles. According to a monitoring campaign bas...

As part of the GoldenEye project with European co-financing type H2020, the Academic Leapfrog Geo licensed program was purchased, with which a 3D modeling of the deposit body was made based on open source data, geological maps of the Romanian Geological Institute, non- secret data of CUPRUMIN company and drone flights. The ore has not been modeled in 3D up to now, this work presents for the first time the first consolidated modeling that highlights the size of the ore deposit body. These modelings will allow the t...

Blasting and mechanical excavation systems are the main methods used in the excavation of rocks masses in mining and construction works. Mechanical excavation is insufficient in the case of very hard rocks masses. Therefore, blasting is widely preferred for the excavation of hard rock masses. Environmental parameters such as ground vibrations, air-shock and fly-rock occur due to blasting. The magnitude of these parameters depend on the explosive per delay, distance between the measurement- and blasting points, geo...

The paper presents a synthesis of the results of the GoldenEye project type H2020 No. 869398 regarding the state of the Cuibarul waste dump of the Rosia Poieni Open Pit in Romania, its chemical and mechanical stability which jeopardizes the surrounding environment. During the project, the factors that influence the stability of the dump were followed, such as: -dumping technology; the geological, hydrogeological and hydrological conditions of the location; the geomorphological conditions of the dump site, the phys...

Fine particles known as combustible dusts can cause explosions when they are suspended in the air under certain conditions. A dust explosion could result in severe fatalities, injuries, and structural devastation. The risk of such events can be reduced by knowing the flammability parameters and the physico-chemical analysis for combustible dusts, in order to take additional protective measures generated by the occurrence of these types of explosive mixtures. The purpose of this research was to identify the flammab...

The identification and analysis of the dangers of accidental initiation/detonation of pyrotechnic devices with a technical purpose in the automotive field containing pyrotechnic articles of category P1 is carried out on the basis of the results obtained following the performance of specialized tests according to the applicable reverential SE EN ISO 14451. The evaluation of the safety quality of these types of products is of particular interest both for occupational safety in their manufacturing process because the...

At European and national level there is Directive 2013/29/EU of the European Parliament and of the Council of 12 June 2013 on the harmonisation of the legislation of the member states relating to the making available on the market of pyrotechnic articles and Decision 1102 of 10 December 2014 issued by the Government of Romania for the national regulation of the placing on the market of these products. The specific quality system of the Explosive Materials and Pyrotechnic Articles Laboratory of INCD INSEMEX Petro?a...

In chemical processes, fire and explosion prevention is crucial, especially when flammable liquids or gases are present because they can create explosive atmospheres of gas or vapour in the air. These include oil-based products and organic solvents. It is essential to understand these compounds' characteristics as well as the size of an explosive atmosphere. Explosion hazards as well as the locations where explosive atmospheres are present can be identified and assessed. Safety data sheets also contains crucial in...

The high jewelry industry, and its supply chain, are considered complex systems that have positively affected the global economy as well as potentially harmed the environment and society due to its resources exploitation. As a consequence, consumers are increasingly demanding for sustainable processes that guarantee traceability through the extraction and manufacturing phases. The aim of this paper is to present and evaluate potential solutions for the traceability of high jewelry raw materials. First of all, this...

Cemented paste backfill (CPB) is an engineering mixture of mine tailings, cement and water. Tailings can commonly contain sulphidic minerals. In this case, acid mine drainage (AMD) may occur due to the oxidation of sulphidic minerals present in the body of the CPB. In general, AMD lowers the pH of the medium and water environment and may cause heavy metal release. Therefore, AMD potential is an important parameter to be considered with regard to environmental aspect. Static tests are widely used to determine the A...

The task of developing carbonate reservoirs has now become extremely important. Low technological indicators of development are explained, as a rule, by an inefficient well placement system, complex geological structure, high oil viscosity, water breakthrough and the occurrence of technological complications in the process of field development. The aim of the work is to refine the geological and reservoir simulation model of a complexly built carbonate reservoir, in terms of areal coverage of wells by hydraulic fr...

To reach autonomous control with good performance in shearer operated longwall mines, control algorithms have to be adapted to the system behaviour. Thus, one of the challenging tasks in this area is the identification of the behaviour, which is declared as complex and specific to each mining area. Therefore, it is necessary to determine a suitable model that reproduces the cut behaviour of a shearer loader and can be adapted to a real mining system. This paper shows and analyses possible model structures to predi...

The paper presents a detailed review of ore and alluvial gold mineral raw material base of North East of Yakutia and estimates the economic efficiency of development of gold deposits not involved in the exploitation. Research methods: analysis and comparison, qualitative and quantitative features of the mineral raw material base of Yakutia, formed and replenished databases on a number of deposits of the region; methods of analogy, economic-statistical, methods of system analysis and decision support, evaluation of...

In order to carry out the detection and examination of explosive substances both before and after their detonation, this multifunctional integrated system uses the work facilities provided by the use of: ISCAN type specialized equipment intended for the determination of threat traces based on the principle of ion mobility spectrometry; GSCAN type specialized equipment intended for the detection of explosives in bulk form and in closed containers using the principle of Raman spectrometry; the LDS800HDK specialized ...

Explosions may have severe consequences on the integrity of structural or nonstructural elements of a building. Being considered events with a low probability of occurrence, they are not considered directly in the design, except in certain special situations (accidental design situations). In the case of deliberate attacks, placing explosive devices at short distances or even attached to building elements can cause major local failures. Local failure and potential loss of load carrying capacity are dependent on lo...

Multiple crises in recent years, including the health crisis caused by the COVID-19 pandemic, the global energy crisis, the climate crisis, the decarbonization of the energy mix, the European Green Pact, the energy transition, the conflict in Ukraine, and the energy trilemma, have created the conditions for a new energy revolution. If the listed influencing factors, the sanctions imposed on Russian oil and gas as well as the confrontation with the components of the trilemma, energy security, minimal impact on the ...

In the exploration and mining industry, fixed and mobile machines use hydraulic drive systems (HDSs) involving hydraulic cylinders powered at high pressure rates. Such cylinders operate in heavy and high-magnitude dynamic load regimes, e.g., as part of mobile crusher buckets, excavators and mini excavators, hook-lift trailers, or mobile hydraulic jacks. In this context, there are two solutions for generating high pressure rates in HDSs: (1) by using high-pressure pumps, or (2) by using hydraulic power units consis...

In this research, the study site is a limestone quarry Ain El-Kebira located in the wilaya of Setif (Northwest -Algeria) producing limestone for cement manufacturing. The present work represents a study to measure the granulometric distribution of the blasted rock using the digital image processing software WipFrag and empirical model KuzRam, in order to evaluate the efficiency of the blasting operation and ensure the stability of the benches. In this work, we will simulate the method of exploitation while analyzi...

The execution of the blasting works involves the management of the problem of storage of explosive materials. This aspect is easier to solve in the case of mines activities with long exploitation time and where storage capacities are arranged, according to the legislation that provides constructive and safety criteria depending on the type and quantity of explosive materials stored. In the case of isolated blasting works, those for road construction, building demolition, underwater or forestry, etc., storage facil...

In recent years, Romania has experienced a particular dynamic in terms of ensuring the security quality of explosive materials through the security requirements stipulated in the applicable harmonized standards. In this sense, the procedure for sampling the products that are the subject of explosive materials must take into account the technicalscientific substantiation of the objective establishment of sampling schemes indexed according to the acceptable quality level for batch-by-batch inspection in order to pro...

The article outlines the practical steps and security requirements for carrying out the destruction of an industrial chimney on a platform housing an oil refinery that is close to critical structures and equipment. The chimney is 150 meters tall and is built out of an interior chimney composed of refractory brick masonry and an exterior tubular structure of reinforced concrete. A risk assessment was conducted with reference to seismic wave, air shock wave, noise, dust, and the amount of shock produced by the conta...

The increase of the population also involve the increase of the consumption of raw materials. This requires the diversification and development of industrial processes in closed semi-enclosed or open spaces. The carrying out of human activities of an industrial nature involves the accidental use, handling or presence of explosive substances such as methane. The presence of this gas in closed or semi-closed spaces can generate explosion phenomena. The dynamics of methane discharge in closed enclosures, industrial o...

Kosovo has significant reserves of coal, where their exploitation began in 1922, coal is a mixture of organic mineral material produced by a natural process of growth and decay, or an accumulation of debris both vegetal and mineral with some sorting and stratification. Based on the geological map, the Kosovo Basin is mainly a tectonic area filled with tertiary sediments. Old rocks represent the Basin area, in the west Paleozoic age and in the east by Upper Cretaceous sediments. In the Coal Basin of Kosovo, along w...

The ventilation network related to a mining unit for the exploitation of the useful mineral substance aims to ensure optimal microclimate conditions in underground. An ventilation network is made up of nodes and branches in order to establish its structure. In this sense, the mine ventilation must be seen as a source of life, in which the ramifications represent at the same time the arteries that transport the air to the working fronts and the evacuation of the poluted air to the surface. In order to establish the...

This chapter deals with the design of optimal ventilation of the Anna seam in the Ostrava - Karvina district, with regard to the parameters of the virgin mining field, depth of deposition, rock temperature, seam gasody and method of spreading. In the first part of the paper, the authors introduce a general description of the mining area, the then state of ventilation and microclimatic conditions. The second part of the paper describes the design of the method of dispersal of the Anna seam between 8-8/7 floors and ...

It is recognized that increased mechanization in mining has resulted in a larger number of workers exposed to longer durations of whole-body vibration (WBV) in mining work context. This physical agent is one of the leading causes for workplace disability and it is regarding of many mining operators that during daily activities use mining vehicles such as dozers, haul trucks, Load Haul Dump (LHD) vehicles and wheeled shovel. The present study was conducted in a typical mining context in order to investigate the eff...

Mining wastes represent a specific type of waste and, like sites after mining, represent sites where a comprehensive assessment of pollution at these sites needs to be approached, taking into account various specific conditions. Subsequently, the design of the remediation technologies used at a specific location must also be adapted to this fact. Until now, mining waste facilities (heaps and sludge ponds) have been treated as environmental burdens. However, it should be borne in mind that abandoned extractive wast...

The processing, transport and storage of flammable materials in the form of dust generates an explosion risk due to the possibility of initiating potentially explosive atmospheres created by dust suspended in air with various ignition sources, some of which may be their own installations. As explosions can cause human casualties and severe property damage, the explosion risk assessment and the application of appropriate measures by manufacturers and users of installations to prevent the ignition of explosive atmos...

Technology of in-situ recovery (ISR) of uranium is using in Kazakhstan for increasing of production 15 times from 800 ton in 1998 till 22 000 ton in 2013. This ISR process is zero wastes technology. Investigations showed serious potential to improve results of ISR technology using biotechnology methods. Uranium in the ore body is usually presented as hexavalent (soluble) and tetravalent uranium (slightly soluble). To convert uranium into a soluble form, it is necessary to oxidize tetravalent uranium. Leaching solu...

Accidental explosions and fires caused by combustible dusts dust are some of the most significant threats in many industries where layers of combustible dusts and clouds are formed as a result of technological processes. When there is a possibility of a combustible dust to occur during the process, as a residue or byproduct, safety measures need to be taken in order to protect the installations and personnel. In the process of manufacturing the aluminum packaging a combustible dust residue is formed. In the presen...

The final success of the mining business is primarily based on a correct and responsible evaluation of the mining and technical conditions of mining, resp. the mining and geological conditions of the mining site concerned, and all the legal aspects involved. By evaluating these conditions, together with the optimal choice of mining procedures, it decides on the safe and efficient use of the reserved mineral deposit in the given mining area. The mining area must be delimited and determined on the basis of the minin...

The paper addresses the sustainability of technological transport, specifically the transport of materials by pipe conveyors. Environmental aspects must also be addressed as part of the solution to the sustainability of pipe conveyors. Pipe conveyors are suitable for the efficient transport of large volumes of bulk material with a minimum of environmental pollution. Closed rubber conveyor belts are a basic structural element of pipe conveyors. These types of conveyor belts have to resist a combination of factors s...

The properties of the basic materials of conveyor belts and adhesion between these materials affect the proper functionality and service life of conveyor belts. Their reliability depends on the adhesive force between their structural components. The purpose of this paper was to investigate into the quality of adhesion of the rubber cover layers to the carcass, and of the adhesion between the adjacent textile plies in a rubbertextile conveyor belt. The experiments were aimed at measuring the adhesive force using th...

The carrying out of human activities of an industrial nature involves the use, handling or accidental presence of substances of a toxic nature such as carbon oxide. The presence of this gas in closed or semi-closed spaces can seriously affect the human body and when concentrations are high it can lead to death. Knowing how carbon oxide affects the human body and how it disperses into the air is very important for establishing preventive measures. Also, in order to establish the escape routes and the refuge areas, ...

Because the occupational risk expressed the possibility of ending up in a (possible) danger of injury and/or occupational illness, it can represent a criterion of qualitative appreciation of the accomplishment of a human action, indicating how it may produce undesirable effects, materialized by human and material damage. The risk associated with a human action is determined by a multitude of risk factors, both of internal nature (manifested by human error) and of an external nature (technical equipment and related...

Used the specialized software solution regarding to the thermochemical facilities, we can predict detonation (e.g. detonation velocity, pressure, energy, heat end temperature, etc.) and combustion (e.g. specific impulse, force, pressure, etc.) performance of energetic materials. The calculation of detonation parameters is based on the chemical equilibrium steady-state model of detonation. The equilibrium composition of detonation and combustion products is calculated by applying modified White, Johnson, and Dantzi...

The transition to mining benches with transverse panels from top to bottom within the boundaries of steeply inclined layers does not allow transforming the results of mininggeometric analysis sequentially for each individual stage of mining into a calendar schedule of mining operations. Therefore, a model is offered for converting the results of mining-geometric analysis into a calendar schedule of mining operations with sequential mining of benches from top to bottom using phased volumes of overburden rocks and o...

The Alto do Sobrido and Ribeiro da Serra Mines, are two antimony-gold mines located in Gondomar, Portugal, and are part of the Durico-Beirao Mining District (DBMD). In this work, we use four geophysical methods, such as gravity, radiometry, magnetic and electromagnetic, to improve the knowledge about these mineralizations and the lithologies and structures associated with them. These four methods allowed us to study these mineralizations through different physical properties. The gravimetric method allowed us to a...

In accordance with the latest trends, considerable emphasis is put on all mining companies in the Czech Republic not only on reducing the environmental impact of brown coal mining, but also on overall efficiency, the balance of which can be improved by increasing of the operational reliability of individual components of technological units and reducing operating costs. And it is the latter sphere, in that Vrsanska uhelna a.s. does considerable initiative. In cooperation with the firm RENOMAG s.r.o. and the Resear...

The work is devoted to the study of the effect of powdered WC monocarbide of different grain sizes, introduced into the composition of the binder of diamond grains of the composition 94 WC + 6Co + Cu in the manufacture of a diamond-bearing matrix of BS-NQ drill bits with a diameter of 75.6 mm, designed by ISM (Ukraine). The effectiveness of the mentioned crowns was evaluated according to the proposed indicator F= ( - mechanical drilling speed; h - the value of the deepening per single experience, - - linear wear o...

Psychosocial risks are defined by the International Labor Organization in terms of interactions between job content, work organization and management, and other environmental and organizational conditions, on one hand, and employee conditions, skills, and needs, on the other. Thus, psychosocial risks refer to those interactions that prove to have a dangerous influence on employees' health through their perceptions and experience. Long-term involvement in stressful work situations can lead to onset of burnout syndr...