scholarly journals OPTIMIZATION OF ORE DEPOSITS SEISMIC FACTOR PARAMETERS DESIGN

2017 ◽  
Author(s):  
В.И. Ляшенко ◽  
О.Г. Бурдзиева ◽  
К.Г. Каргинов ◽  
В.И. Голик
Keyword(s):  
Residential Buildings ◽  
Complex Structure ◽  
Ore Deposits ◽  
Seismic Action ◽  
Resource Saving ◽  
Seismic Safety ◽  
Experimental Section ◽  
Quantitative Parameters ◽  
Camera Systems ◽  
Seismic Vibrations

Систематизированы особенности локализации и разработки месторождений руд сложного строения с развитой тектоникой и интенсивной трещиноватостью. Приведены результаты исследования влияния взрывных работ в экспериментальном блоке. Определены количественные параметры сейсмического действия взрыва с учетом закономерностей распространения сейсмовзрывных колебаний. Определена сейсмобезопасная величина заряда для промышленных и гражданских строений, жилых зданий и других объектов. Описаны закономерности распространения сейсмического действия взрыва в районе ведения горных работ. Даны рекомендации по применению природоохранных и ресурсосберегающих технологий для камерных систем разработки с закладкой выработанного пространства твердеющими смесями. Systematized features of localization and development of ore deposits complex structure developed tectonics and intense fracturing. The results of studies of the effect of blasting operations in the experimental section. The quantitative parameters of the seismic action explosion taking into account the laws of propagation of seismic vibrations. Determined seismic safety for industrial and civil buildings, residential buildings and other objects of value of the charge.The regularities of seismic action of explosion in the area of mining. Recommendations on the use of environmental and resource-saving technologies for the development of camera systems with laying out space hardening mixtures.

Environmental and Resource-Saving Technologies and Technical Equipment for Processing and Disposal of Man-General Formation and Waste

2021 ◽  
Vol 25 (5) ◽  
pp. 10-15
Author(s):  
V.I. Lyashenko ◽  
T.V. Chekushina ◽  
T.V. Dudar ◽  
I.A. Lisovoy
Keyword(s):  
Underground Mining ◽  
Complex Structure ◽  
Ore Deposits ◽  
State Enterprise ◽  
Utilization Rate ◽  
Technical Equipment ◽  
Vital Activity ◽  
Resource Saving ◽  
Metallurgical Production ◽  
Zone Of Influence

The substantiation of environmental and resource-saving technologies and technical means for the processing and disposal of man-made formations and waste from mining and metallurgical production into underground mined-out spaces (man-made voids) as components of hardening filling mixtures is given. This will ensure the safety of the day surface from destruction and the vital activity of the population living in the zone of influence of the mining region. It was found that for the mines of the State Enterprise "VostGOK" (Ukraine), the utilization rate of waste of own production for the hardening filling is from 0.45 to 0.68; hydraulic – from 0.56 to 0.75; free-flowing – 0.62, and the extraction of each ton of salable ore is accompanied by the output of 0.7–0.8 tons of waste. The research results can be used in underground mining of ore deposits of complex structure and mining and metallurgical production.

scholarly journals The study of seismic effects and shock air waves during a large-scale blast at the Ust-Katavskiy granite quarry

2020 ◽  
Vol 177 ◽  
pp. 03021 ◽  
Author(s):  
Pavel Menshikov ◽  
Semen Taranzhin ◽  
Alexander Flyagin
Keyword(s):  
Large Scale ◽  
Residential Buildings ◽  
Boarding School ◽  
Building Stone ◽  
Urban District ◽  
Seismic Safety ◽  
Seismic Vibrations ◽  
Chelyabinsk Region ◽  
The Impact ◽  
Limiting Values

The analysis of the values of the permissible speed of seismic vibrations and the calculation of the limiting values of short-term vibration at the base of the protected objects of Ust-Katav town and the settlement of Maliy Berdyash are carried out. Instrumental measurements of the speed of seismic vibrations of soil and pressure at the front of an air shock wave (air blast) during a large-scale blast in a quarry of building stone (dolomites) of «Ust-Katavskiy Granite Quarry» LLC (UKGK) were carried out in order to determine and evaluate safe seismic and shock air the impact of blasting on residential buildings in the settlement of Maliy Berdyash and the building of a special comprehensive boarding school in the Ust-Katavskiy urban district of the Chelyabinsk region. The conditions for blasting that provide seismic safety of protected objects are determined.

Environmental and Resource-Saving Technologies for Void Extinguishing During Underground Ore Mining

2020 ◽  
Vol 24 (8) ◽  
pp. 28-33
Author(s):  
V.I. Lyashenko ◽  
T.V. Chekushina ◽  
T.V. Dudar ◽  
I.A. Lisovoy
Keyword(s):  
Underground Mining ◽  
Complex Structure ◽  
Ore Deposits ◽  
Electrical Activation ◽  
Vital Activity ◽  
Resource Saving ◽  
Influence Zone ◽  
Metallurgical Production ◽  
Research Results ◽  
Production Wastes

The substantiation of environmental and resource-saving technologies for the repayment of voids in underground ore mining is provided, which ensures the preservation of the day surface and the vital activity of the population living in the influence zone of the mining region. The expediency of utilizing mining and metallurgical production wastes into underground mined spaces (man-made voids) as components of hardening filling mixtures is shown. The effectiveness of the use of vibration, mechanical and electrical activation of components of the hardening filling mixture in mining enterprises has been established. The research results can be used in underground mining of ore deposits of complex structure.

scholarly journals Problems of dynamic modeling of the commissioning of residential buildings in the post-Soviet countries

2021 ◽  
Vol 16 (91) ◽  
pp. 40-51
Author(s):  
Olga V. Ledneva ◽  
◽  
Alexander P. Tsypin ◽  
Keyword(s):  
Time Series ◽  
Characteristic Point ◽  
Residential Buildings ◽  
Complex Structure ◽  
Complex Model ◽  
Housing Construction ◽  
Scientific Publications ◽  
Fourth Degree ◽  
Soviet Space ◽  
Post Soviet Space

The article is devoted to the description of procedures of economic and mathematical modeling of trends in the field of housing construction taking into account the peculiarities of various countries of the post-Soviet space. The results of analysis of well-known scientific publications on forecasting the dynamics of housing market indicators are presented. It has been shown that most domestic and foreign scientists as the most effective methods of modeling these indicators consider methods of analyzing time trends, in which polynomials of high (in some cases up to the fourth degree) order are used to approximate the available retrospective data. Other common approaches to solving this problem are the use of short-term forecasting based on moving average algorithms, as well as the use of the SARIMA model, which takes into account the trend and seasonal wave. The article shows that these methods do not fully take into account the profound changes in the construction complexes of the post-Soviet states caused by the significant structural transformation of their socio-economic systems. The authors proposed to use econometric models based on regressions with dummy variables to model the main indicators of housing construction, taking into account the complex structure of the external and internal environment of national construction complexes. It has been shown that in a significant number of practical situations, a fairly simple but effective way to take into account the components of the time series of the indicators under consideration in one complex model is to use the model of "change in growth (fall)" when choosing the time of the beginning (end) of a crisis situation as a characteristic point. The results of modeling the main indicators of housing construction for various countries of the post-Soviet space showed that the proposed model when constructing the medium-term forecast allows taking into account the situation component of the analyzed time series.

scholarly journals Improving the efficiency of leaching of metals from ore raw materials

2018 ◽  
pp. 45-57
Author(s):  
V.I. Lyashenko ◽  
F.F. Topolnyi ◽  
G.D. Kovalenko
Keyword(s):  
Underground Mining ◽  
Raw Materials ◽  
Residential Buildings ◽  
Practical Experience ◽  
Environmental Safety ◽  
Theory And Practice ◽  
Raw Material ◽  
Material Base ◽  
Seismic Safety ◽  
Industrial Buildings

Purpose. Improving the efficiency of leaching of metals from ore raw materials by justifying the parameters of underground mining and the introduction of integrated technology in combination with geotechnology, ensuring the rational use, protection of the subsurface and the environment during the development of reserves by combined geotechnological methods. Metology. The methods of generalization, analysis and evaluation of practical experience and scientific achievements in the field of geotechnology, theory and practice of explosive destruction of solid media, continuum mechanics, mathematical statistics, as well as research techniques of wave processes according to standard and new techniques of the leading experts of the world's advanced mining countries are described. Findings. The factors determining the leaching efficiency of metal ores, environmental and seismic safety are established and the parameters of the explosion are justified taking into account the size of an average linear piece of exploded ore mass, the area of an emanating surface and the seismic safety of protected objects (industrial buildings, residential buildings, the Ingul river underflow, Kropivnitsky, etc.). Originality. Recommended empirical dependence for the prediction of the oscillation speed on the reduced mass of charge per deceleration step in the explosive preparation of ore for underground leaching of metals for the field conditions of the form y = a ∙ b also the value of the permissible displacement rate of the soil at the base of the protected objects = 0.4 cm / s. Practical value. When non-conforming ores of deposits are involved in the production, their raw material base at operating mines can be increased 1.4–1.6 times. Keywords: mining technology, underground mining, metal leaching, environmental safety, efficiency.

scholarly journals The Influence Of Foundation Soils Concernig The Behaviour Of Buildings

2015 ◽  
Vol 5 (2) ◽  
pp. 87-93
Author(s):  
M. Tudorică ◽  
C. Bob
Keyword(s):  
High Risk ◽  
Large Scale ◽  
Seismic Action ◽  
Entire Volume ◽  
Seismic Safety ◽  
Behaviour Analysis ◽  
Swelling Soil ◽  
Existing Structure

Abstract An issue more and more important in construction science represents the rehabilitation of structures placed on difficult soils. This paper presents the behaviour analysis of an existing structure and summarizes several consolidation solutions at both levels of a severely damaged construction placed on a shrinking and swelling soil, located in Arad County - Romania, situated on 55 Revolutiei Avenue. These types of soils are known in specialty literature as shrinking fields, expansive or active soils, having the property to modify sensitively their entire volume when there are variations of moisture, being spread on a large scale in Romania. After the assessment of seismic safety for a section of the damaged structure, which is characterized by a high risk of collapse from seismic action, reason for which it has been proposed to immediate by consolidate the damaged construction.

scholarly journals Mining of rich iron ore deposits of complex structure under the conditions of rock pressure development

2020 ◽  
Vol 201 ◽  
pp. 01022
Author(s):  
Serhii Pysmennyi ◽  
Mykhailo Fedko ◽  
Nataliia Shvaher ◽  
Serhii Chukharev
Keyword(s):  
Rock Pressure ◽  
Complex Structure ◽  
Ore Deposits ◽  
Mining System ◽  
Mining Depth ◽  
Parabolic Shape ◽  
Pressure Development ◽  
Iron Ore Deposits ◽  
Horizontal Pressure ◽  
Compensation Chamber

The purpose of research is to increase the ore mass extraction ratio when mining rich iron ores by changing the shape of the stope chamber, as well as to substantiate its stable parameters under the conditions of the rock pressure manifestation. Used in mines existing methodologies for determining the structural elements of mining system are based on calculated equivalent spans of outcropping the stope chambers, which have a rectangular or tent shape. For the first time using the ANSYS software package, it has been determined that the formation of a compensation chamber of quasi-parabolic shape can significantly reduce the stresses concentration around the stope block. Thus, the formation of a stope chamber of a quasi-parabolic shape makes it possible to reduce vertical stresses as compared to horizontal ones without increasing horizontal pressure. When mining the extraction block, it is proposed to form the stope chamber of a quasi-parabolic shape with geometric parameters that directly depend on the parameters of the deposit, the depth of mining, and the direction of main stresses action. Dependences have been determined of the stresses value on the depth of mining and the physical properties of rocks, as well as on the length along the strike of the ore deposit. Thus, depending on the mining depth and length along the strike, rock pressure on the stope chamber of a quasi-parabolic shape decreases under non-uniform loading. The formation of a stope chamber of a quasi-parabolic shape will increase by 1.2 – 1.5 times the volume of pure ore that is recovered from the block.

scholarly journals The furnace and the goat—A spatio-temporal model of the fuelwood requirement for iron metallurgy on Elba Island, 4th century BCE to 2nd century ce

PLoS ONE ◽  
2020 ◽  
Vol 15 (11) ◽  
pp. e0241133
Author(s):  
Fabian Becker ◽  
Nataša Djurdjevac Conrad ◽  
Raphael A. Eser ◽  
Luzie Helfmann ◽  
Brigitta Schütt ◽  
...  
Keyword(s):  
Historical Context ◽  
Ore Deposits ◽  
Resource Saving ◽  
Iron Smelting ◽  
Roman Provinces ◽  
Iron Ore Deposits ◽  
Temporal Model ◽  
Elba Island ◽  
Spatio Temporal ◽  
Past Conditions

Scholars frequently cite fuel scarcity after deforestation as a reason for the abandonment of most of the Roman iron smelting sites on Elba Island (Tuscan Archipelago, Italy) in the 1st century bce. Whereas the archaeological record clearly indicates the decrease in smelting activities, evidence confirming the ‘deforestation narrative’ is ambiguous. Therefore, we employed a stochastic, spatio-temporal model of the wood required and consumed for iron smelting on Elba Island in order to assess the availability of fuelwood on the island. We used Monte Carlo simulations to cope with the limited knowledge available on the past conditions on Elba Island and the related uncertainties in the input parameters. The model includes both, wood required for the furnaces and to supply the workforce employed in smelting. Although subject to high uncertainties, the outcomes of our model clearly indicate that it is unlikely that all woodlands on the island were cleared in the 1st century bce. A lack of fuel seems only likely if a relatively ineffective production process is assumed. Therefore, we propose taking a closer look at other reasons for the abandonment of smelting sites, e.g. the occupation of new Roman provinces with important iron ore deposits; or a resource-saving strategy in Italia. Additionally, we propose to read the development of the ‘deforestation narrative’ originating from the 18th/19th century in its historical context.

scholarly journals Improving of seismic safety of rocky deposits underground mining based on new charges of explosives application

2019 ◽  
Vol 75 (8) ◽  
pp. 912-922
Author(s):  
V. I. Lyashenko ◽  
O. E. Khomenko ◽  
P. A. Kislyi
Keyword(s):  
Underground Mining ◽  
Seismic Action ◽  
Emulsion Explosive ◽  
Seismic Safety ◽  
Important Place ◽  
High Productivity ◽  
Safety Standards ◽  
Explosive Materials ◽  
Automation Systems ◽  
And Control

Improving of seismic safety of rocky deposits underground mining is an important scientific and social task. Among possible methods of its solving, application of new explosive materials occupies an important place. Main scientific and practical results of the study in this area presented. An analysis of previous studies and control observations, instrumental measuring of an explosion seismic action by devices and apparatus accomplished. It was shown, that seismic safety improving and efficiency of explosive work at mines increase reached by intensification of technological processes with application of high productivity selfpropelled and small-size charging machinery of new generation, such as machines of ЗЭВС-1 model and portable chargers of ЗЭП15 model, used for explosion operations mechanization. Application of pouring ecologically clean trotyl-free emulsion explosive materials of “Украинит-ПП-2” (Ukranit-PP-2) type also favors to the improving of seismic safety. Their characteristics and purpose presented, peculiarities of application considered. Analysis of methods and technical means for seismic measurements accomplished. Elaboration of seismic monitoring system with application of state-of-the-art automation systems and electronic seismographs proposed, that will allow decreasing level of seismic action on buildings and constructions in an explosion action zone down to requirements of seismic safety standards.

scholarly journals An effective way to rock mass preparation on metallic and nonmetallic quarries Ukraine

2019 ◽  
Vol 109 ◽  
pp. 00031
Author(s):  
Kostiantyn Ishchenko ◽  
Volodymyr Konoval ◽  
Liudmyla Lohvyna
Keyword(s):  
Cross Section ◽  
Rational Design ◽  
Complex Structure ◽  
Experimental Studies ◽  
Variable Cross Section ◽  
Ore Deposits ◽  
Variable Cross ◽  
Borehole Charge ◽  
Novel Method ◽  
Comparative Results

A method in experimental studies and industrial-polygon particular conditions justifying the choice of a rational design of an explosive charge. The comparative results of the evaluation of the stress wave’s amplitudes studies and the character of crushing hard media from the explosion of the charge explosives-variable and constant cross section. The dependences of the particle size distribution of various designs explosive charges destroyed by the explosion are constructed. In industrial conditions, the rationale for the explosive boreholes location according to the massif structure. Adjusted boreholes location grid on rational parameters blasting unit, determined using a novel method of breaking rock complex structure. A new design of a combined borehole charge of variable cross section has been proposed. Industrial tests performed and evaluation of the effectiveness of the proposed method blasting locally fractured rocks and ore deposits on non-metallic minerals. Recommendations on their use are given.

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