scholarly journals DEVELOPMENT AND JUSTIFICATION OF A HYDRO-IMPULSE METHOD FOR INCREASING ORE PERMEABILITY IN CONDITIONS OF URANIUM BOREHOLE PRODUCTION

2020 ◽  
Vol 6 (444) ◽  
pp. 126-133
Author(s):  
T. Kuandykov ◽  
◽  
D. Nauryzbayeva ◽  
K. Yelemessov ◽  
T. Karmanov ◽  
...  
Keyword(s):  
3D Model ◽  
Operating Parameters ◽  
Wave Method ◽  
Optimal Parameters ◽  
Chemical Methods ◽  
Operating Cycle ◽  
Factors Affecting ◽  
Geological Conditions ◽  
Hydrodynamic Method ◽  
Restoration Work

The technology of downhole uranium production used at mining enterprises in Kazakhstan is described, the factors affecting the decrease in the filtration characteristics of productive formations are studied in detail, and an effective method is described for increasing the downhole uranium production. The applied methods of intensification of downhole production at uranium mining enterprises are considered, the positive and negative aspects of the electroplasma and chemical methods are discussed. Calculations of the working values of the hydro-wave method of destruction of clogging formations in the well and the parameters of the solution supply during repair and restoration work are presented. Based on the calculation of the operating parameters, a diagram of the dependence of the operating cycle of the hydropercussion machine on the flow rate of the water supplied to the machine is constructed. The developed 3D model of the hydropercussion apparatus for increasing the permeability of the productive horizon is presented. The advantages of the use of the hydrodynamic method for restoring the permeability of the productive horizon in the conditions of downhole uranium production in difficult mining and geological conditions are disclosed. The optimal parameters for intensification of downhole uranium production in difficult mining and geological conditions are recommended, and a method for using a hydropercussion apparatus in combination with traditional methods of well regeneration is developed.

scholarly journals RESULTS OF APPLYING THE METHODOLOGY FOR THE QUANTITATIVE ASSESSMENT CONFIRM THE PREDICTION OF THE 3D MODELFOR HORIZONTAL SECTION OF WELLS

2017 ◽  
pp. 13-19
Author(s):  
R. M. Bembel ◽  
I. A. Schetinin
Keyword(s):  
Quantitative Assessment ◽  
3D Model ◽  
Forecast Model ◽  
Horizontal Section ◽  
Factors Affecting

The article discusses results of the use methodology for quantification of prediction of the 3D model for geosteering. This methodology tested for 90 wells with horizontal completion. According to the obtained statistics to assess factors affecting the reliability of the forecast model and defines the boundary criteria of quality confirmation.

scholarly journals Study of the Conditions for Construction of the Haulage Berm in the Deposit Ledger-Wall

2019 ◽  
Vol 105 ◽  
pp. 01034
Author(s):  
Svetlana Bakhaeva ◽  
Elena Chernykh
Keyword(s):  
Slope Angle ◽  
Open Pit ◽  
Factors Affecting ◽  
The Road ◽  
Road Base ◽  
Single Side ◽  
Geological Conditions ◽  
Shipping Cost ◽  
Shear Characteristics ◽  
Spoil Bank

To reduce transportation distance and shipping cost for rock haulage with a single-side development system, it is relevant to build roads on the spoil bank of the open-pit. The article reviews factors affecting stability of the spoil bank and the most common types of deformation. The backward calculation method for obtaining resistance to shear characteristics of the base rocks in contact with a road embankment has been described. Schemes for road constructions on the spoil bank of the open-pit have been considered. Mining and geometric simulation of the road base has been built. Zoning of the road base as per slope angle of the underlying rock and parameters of the haulage berm allow tracing rapidly axis of the technological and engineering roads for actual engineering and geological conditions. Besides, measures to reduce risk factors of landslides during construction of the haulage berm at deposit ledger-wall have been considered.

scholarly journals Key Factors Affecting the Deformation and Failure of Surrounding Rock Masses in Large-Scale Underground Powerhouses

2020 ◽  
Vol 2020 ◽  
pp. 1-20
Author(s):  
Meng Wang ◽  
Jia-wen Zhou ◽  
An-chi Shi ◽  
Jin-qi Han ◽  
Hai-bo Li
Keyword(s):  
Rock Mass ◽  
Large Scale ◽  
Surrounding Rock ◽  
Rock Masses ◽  
Affecting Factors ◽  
Key Factors ◽  
Underground Powerhouse ◽  
Deformation And Failure ◽  
Factors Affecting ◽  
Geological Conditions

The stability of the surrounding rock masses of underground powerhouses is always emphasized during the construction period. With the general trends toward large-scale, complex geological conditions and the rapid construction progress of underground powerhouses, deformation and failure issues of the surrounding rock mass can emerge, putting the safety of construction and operation in jeopardy and causing enormous economic loss. To solve these problems, an understanding of the origins and key affecting factors is required. Based on domestic large-scale underground powerhouse cases in the past two decades, key factors affecting the deformation and failure of the surrounding rock mass are summarized in this paper. Among these factors, the two most fundamental factors are the rock mass properties and in situ stress, which impart tremendous impacts on surrounding rock mass stability in a number of cases. Excavation is a prerequisite of surrounding rock mass failure and support that is classified as part of the construction process and plays a pivotal role in preventing and arresting deformation and failure. Additionally, the layout and structure of the powerhouse are consequential. The interrelation and interaction of these factors are discussed at the end of this paper. The results can hopefully advance the understanding of the deformation and failure of surrounding rock masses and provide a reference for design and construction with respect to hydroelectric underground powerhouses.

Optimization of the Spray Drying Operating Conditions for Producing the Powder Mixture of Gum Arabic and Maltodextrin

2017 ◽  
Vol 13 (8) ◽  
Author(s):  
Duc Quang Nguyen ◽  
Sabah Mounir ◽  
Karim Allaf
Keyword(s):  
Spray Drying ◽  
Air Temperature ◽  
Powder Mixture ◽  
Gum Arabic ◽  
Feed Solution ◽  
Operating Conditions ◽  
Operating Parameters ◽  
Spray Dryer ◽  
Optimal Parameters ◽  
The Impact

AbstractThe powder mixture of gum arabic and maltodextrin was produced by spray drying. The inlet air temperature of spray dryer was varied from 160 °C to 260 °C and the maltodextrin content was varied from 0 to 50 % in the feed solution with the concentration of 42.5 % (w/v) total solids by weight. The properties of the finished product were characterized to examine the impact of changes in these operating parameters. The results showed that: the inlet air temperature had a stronger influence on the properties of finished product than the MD/GA ratio, whereas the feed rate was more clearly affected by the MD/GA ratio. Two optimal parameters obtained include MD/GA ratio equal to 0.615 and the inlet air temperature of spray dryer Te = 258 °C.

scholarly journals Increasing of filtration characteristics of ore bodies in borehole uranium mining

2020 ◽  
Vol 168 ◽  
pp. 00014
Author(s):  
Bayan Rakishev ◽  
Zhiger Kenzhetayev ◽  
Asel Shampikova ◽  
Bakytzhan Toktaruly
Keyword(s):  
Experimental Work ◽  
Uranium Mining ◽  
Optimal Parameters ◽  
Chemical Reagents ◽  
Chemical Type ◽  
Ore Bodies ◽  
Geological Conditions ◽  
Before And After ◽  
Degree Of Extraction ◽  
Borehole Mining

There is a description of technology by borehole uranium mining in Kazakhstan. The factors which affect for reduction of filtration characteristics in productive reservoirs are studied in detail and described an effective method for increasing borehole uranium production. The processes that occur during borehole mining of uranium with the use of sulfuric acid as solvent, as well as the conditions and reasons for reducing the productivity of geotechnical wells during their operation are considered. The results of experimental work on the intensification of borehole uranium mining in complex mining and geological conditions are analyzed and discussed, comparative graphs of the content of uranium in the productive solution, the flow rate of wells, the degree of extraction and the volume of production before and after the experiments are constructed. The results of experimental work on the efficiency of borehole uranium production, the content of uranium in PS and the productivity of wells, with predominance of the chemical type of sedimentation, are positively evaluated. The optimal parameters for the intensification of borehole uranium production in complex mining and geological conditions are recommended, and method for using complex of multi-purpose chemical reagents in combination with traditional methods of well regeneration is developed.

scholarly journals Overhead Transmission Lines Deicing under Different Incentive Displacement

2014 ◽  
Vol 2014 ◽  
pp. 1-8
Author(s):  
Qing He ◽  
Xi-feng Lv ◽  
Xiao-tong Zhao
Keyword(s):  
Transmission Lines ◽  
3D Model ◽  
Factors Affecting ◽  
Overhead Transmission Line ◽  
Temperature Environment ◽  
Safety And Reliability ◽  
Constraint Length ◽  
Main Factors ◽  
Ice Shedding ◽  
Excitation Conditions

Overhead transmission line icing is one of the main factors affecting safety and reliability of power grid. This paper proposed an excitation deicing method of iced wire and theoretically revealed the ice removal mechanism under displacement excitation conditions, by taking the LGJ-70/10 glaze icing wire as the 3D model and analyzing and studying its dynamic response under the effect of displacement excitation. The simulation results show that the stress of wire icing area is enlarged with the increase of excitation displacement and frequency. Through the comparison of the compression strength experimental results on a series of different iced wires in low temperature environment, the authors found out that the stress generated from the wire icing area is greater than the crushing strength of the ice within the scope of the calculation parameters, which proved the validity and the feasibility of the method, and finally the suitable excitation displacement is determined. Following studies show that, as far as possible, it is necessary to reduce the incentive displacement and also to select the appropriate constraint length in order to avoid the line jumping that may be caused by large span ice shedding.

scholarly journals Determining the operating parameters of machine systems in potash mines when tunneling with stope back partial section

2020 ◽  
pp. 105-112
Author(s):  
Mikhail S. Ozornin ◽  
Keyword(s):  
Lower Layer ◽  
System Capacity ◽  
Magnesium Salt ◽  
Operating Parameters ◽  
Salt Deposit ◽  
Cross Sectional ◽  
Machine System ◽  
Geological Conditions ◽  
Machine Systems ◽  
Full Face

Introduction. Heading and winning machine system operation has been considered in the conditions of the Upper Kama (Verkhnekamskoe) potassium and magnesium salt deposit. Excavation of producing formations with the thickness of more than 4 m is carried out in two moves. The lower layer is excavated by the second move, while the area of the stope back is usually less than the cross-sectional area of the machine’s executive body. In this case, the heading and winning machine does not have a full face. Typical calculation methods contain no information for determining the operating parameters of machine systems at potash mines when tunneling with stope back partial section. Research methodology. The methodological foundations of a machine system capacity determination in the conditions of the Upper Kama potassium and magnesium salt deposit are described. The calculation of the main parameters characterizing the operation of the machine system when tunneling with stope back partial section. Results. Based on the identified dependencies, it is possible to determine the rational type of machine system equipment, the rate of hauling the machine to the face, and rational delivery distances based on equipment type and geological conditions. Summary. The proposed method of a machine system’s operating parameters determination in potash mine when tunneling with stope back partial section can be adapted and used in potash mines with various mining and geological and mining conditions to determine the capacity of machine systems.

scholarly journals Determining the ability to receive rock of waste dumps when exploiting a group of open-pit coal mines

2020 ◽  
Vol 61 (5) ◽  
pp. 71-79
Author(s):  
Hoan Ngoc Do ◽  
Fomin Sergey Igorevic ◽  
Keyword(s):  
Waste Disposal ◽  
Coal Mines ◽  
Open Pit ◽  
Environmental Restoration ◽  
Open Pit Mines ◽  
Waste Dumps ◽  
Geological Conditions ◽  
Restoration Work ◽  
Transportation Flows ◽  
To Receive

In the process of developing the general exploitation and disposal plan for the Deonai, CocSau and Caoson coal mines, use should be taken into account the maximum internal disposal sites to reduce the transport supply and facilitate the environmental restoration work after exploitation. However, in the geological conditions of these coal mines, in order to ensure the space to exploit and make full use of useful minerals, it is necessary to calculate the economic efficiency when building the exploitation and disposal plan. The content of the article is based on the criteria of optimum transportation flows of rock in the arrangement of waste disposal when exploiting a group of three open-pit mines Deo Nai, Coc Sau and Cao Son.

scholarly journals Shale gas well productivity potential evaluation based on data-driven methods: case study in the WY block

2022 ◽  
Author(s):  
Chaodong Tan ◽  
Hanwen Deng ◽  
Wenrong Song ◽  
Huizhao Niu ◽  
Chunqiu Wang
Keyword(s):  
Shale Gas ◽  
Production Optimization ◽  
Data Driven ◽  
Operating Parameters ◽  
Geological Condition ◽  
Gas Wells ◽  
Gas Well ◽  
Geological Conditions ◽  
Potential Evaluation ◽  
Productivity Potential

AbstractEvaluating the productivity potential of shale gas well before fracturing reformation is imperative due to the complex fracturing mechanism and high operation investment. However, conventional single-factor analysis method has been unable to meet the demand of productivity potential evaluation due to the numerous and intricate influencing factors. In this paper, a data-driven-based approach is proposed based on the data of 282 shale gas wells in WY block. LightGBM is used to conduct feature ranking, K-means is utilized to classify wells and evaluate gas productivity according to geological features and fracturing operating parameters, and production optimization is realized through random forest. The experimental results show that shale gas productivity potential is basically determined by geological condition for the total influence weights of geologic properties take the proportion of 0.64 and that of engineering attributes is 0.36. The difference between each category of well is more obvious when the cluster number of well is four. Meanwhile, those low production wells with good geological conditions but unreasonable fracturing schemes have the greatest optimization space. The model constructed in this paper can classify shale gas wells according to their productivity differences, help providing suggestions for engineers on productivity evaluation and the design of fracturing operating parameters of shale gas well.

scholarly journals Specificity of the seismic material obtained in complex seismo geological conditions (swamp zone)

2019 ◽  
Author(s):  
А.А. Левицкий ◽  
А.В. Рудаков ◽  
М.С. Левицкая
Keyword(s):  
Negative Impact ◽  
Seismic Source ◽  
Integrated Approach ◽  
Seismic Exploration ◽  
Near Surface ◽  
Factors Affecting ◽  
Geological Conditions ◽  
Seismic Recording ◽  
Surface Section

Основная цель работы – описание новых технических и методологических средств, используемых АО «Южморгеология» при проведении полевых сейсморазведочных работ МОГТ 3D в лиманно-плавневых зонах Славянского района Краснодарского края в 2014-2015 гг. Представлены основные результаты опытных работ, обоснован выбор параметров съемки и их влияние на качество сейсмической записи: заглубление пневмоисточников BOLT 2200LL-BHS, количество накоплений возбуждения и необходимая глубина погружения датчиков регистраторов. В качестве датчиков регистраторов использовались маршфоны «СВГ-6», которые задавливались с помощью металлического шеста с креплением на конце на глубину 1,0–2,5 м до достижения уверенного контакта с твердой поверхностью (плотный грунт, глинистая подошва), снижая негативное влияние шумов (микросейсм) от корневой системы камышей (рис. 2А, В). Группирование «СВГ-6» шестью последовательно соединенными геофонами (GS-20DX) увеличило чувствительность датчика к слабым сигналам, возбуждаемым, в слабо консолидированной толще, а его прочная конструкция и металлическая проушина, позволила извлекать маршфон из скважины, полностью заполненной водой и шламом.  Приведены основные свойства верхней части разреза (ВЧР) исследуемой площади по данным бурения с кратким описанием литологической характеристика разреза до глубины 10 м. Показаны сейсмограммы, полученные на одном участке в разных сейсмогеологических условиях. Выявлена зависимость распределения значений среднеквадратичных амплитуд и доминантных частот по площади от поверхностных условий возбуждения и приема колебаний. Данная зависимость также прослеживается на предварительных временных разрезах. Были проанализированы основные факторы, влияющие на качество получаемого сейсмического материала. На основе проведенного исследования авторами обосновывается необходимость использования комплексного подхода к анализу качества сейсмических данных при работах в сложных сейсмогеологических условиях. В качестве вывода приведены основные рекомендации к проведению сейсморазведочных работ в лиманно-плавневых зонах. The main objective of the work is the description of new technical and methodological tools used by Yuzhmorgeologiya JSC when conducting CDP 3D field seismic surveys in the estuaries of the Slavyansk district of the Krasnodar Region in 2014-2015. The main results of the experimental work are presented; the choice of survey parameters and their impact on the quality of the seismic recording is validated: digging-in of the seismic source points BOLT 2200LL-BHS, the number of excitation accumulations and the required depth of recorder sensors. Geophones “SVG-6” were used as sensors of the recorders, which were crushed with a metal pole with a fastening at the end to a depth of 1.0–2.5 m until steady contact with a solid surface (dense soil, clay base) was achieved, reducing the negative impact noise (microseism) from the root system of reeds (Fig. 2A, B). Grouping the SVG-6 with six consecutive geophones (GS-20DX) increased the sensitivity of the equipment to weak signals being excited in a weakly consolidated layer, and its robust design and metal eye, made it possible to extract the geophone from a well completely filled with water and sludge. The basic properties of the upper part of the section (near-surface section) of the studied area are given according to the drilling data with a brief description of the lithological characteristics of the section to a depth of 10 m. Seismograms obtained at one site in different seismic and geological conditions are shown. The dependence of the distribution of values of root-mean-square amplitudes and dominant frequencies over the area on the surface conditions of excitation and reception of vibrations is revealed. This dependence is also observed in the preliminary time sections. The main factors affecting the quality of the obtained seismic material were analyzed. Based on the present study, the authors validate the need for the use of an integrated approach to analyzing the quality of seismic data when working under complex seismic and geological conditions. As a conclusion, the main recommendations for seismic exploration in the estuaries are presented.

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