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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...

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...

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...

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 results of numerical simulation of the accumulation of nitrogen oxides in the deadend and main workings during the operation of the mucking and flitting device at the stages of loading and auxiliary operations are presented. The process of accumulation of nitrogen oxides is modeled on the basis of a previously developed two-stage methodological approach: the 1st stage is the calculation of aerodynamic parameters with applying a standard (?? ? ??)-model turbulence and the 2nd stage is the solution of the convec...

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...

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 ...