scholarly journals Analyzing methods of determining pre-destruction of blast hole vicinity

2021 ◽  
Vol 34 (04) ◽  
pp. 1448-1460
Author(s):  
Yevgeny B. Shevkun ◽  
Alexander V. Leshchinsky ◽  
Evgeny A. Shishkin ◽  
Yuri A. Lysak ◽  
Andrey Yu. Plotnikov
Keyword(s):  
Rock Mass ◽  
Blast Hole ◽  
Rock Massif ◽  
Energy Costs ◽  
Barren Rock ◽  
Rock Destruction ◽  
Strain Waves ◽  
Blast Energy ◽  
Mineral Wealth ◽  
Efficient Measure

The level of deformation of the rock massif of a blasted slab must be planned in advance, depending on the required results of blasting. Thus the energy costs of barren rock overfilling as part of preparing for overburden excavation are inefficient. On the contrary, an increase in the blast energy spent on degrading and breaking the ore mass is an efficient measure of preparing for the excavation of mineral wealth. There are currently two methods used to determine the pre-destruction of a blasted rock massif. The first one is based on determining the number of strain waves passing through locations of borehole charges. However, this method fails to determine the preliminary rock destruction level. The second method is based on determining coefficients of the pre-destruction of a rock massif by these strain waves. The merit of this method is that it allows evaluating the quality pattern of the pre-destruction of a rock massif. The procedure of considering the fraction of energy of the strain waves, reflected by the shielding rock mass to the destructive amount of blasting charges and refracted to this destroyed rock, is proposed.

scholarly journals ИССЛЕДОВАНИЕ ВОЗМОЖНОСТИ РЕГИСТРАЦИИ МЕДЛЕННЫХ ДЕФОРМАЦИОННЫХ ВОЛН ЛАЗЕРНЫМ ДЕФОРМОГРАФОМ

2019 ◽  
Author(s):  
I.Y. Rasskazov ◽  
V.A. Lugovoy ◽  
D.I. Tso
Keyword(s):  
Rock Mass ◽  
Experimental Research ◽  
Seismic Waves ◽  
Gulf Of Alaska ◽  
Rock Massif ◽  
Experimental Investigations ◽  
Correct Interpretation ◽  
Acoustic Activity ◽  
Laser Measurements ◽  
Deformation Processes

В статье представлены экспериментальные исследования по обнаружению медленных деформационных волн, интенсифицирующих геомеханические процессы в массиве горных пород, с применением высокочувствительных лазерных измерений. Проведены результаты экспериментальных исследований по оценке влияния удаленных землетрясений на состояние горного массива Стрельцовского рудного поля, регистрации удаленных землетрясений и их предвестников. Приведены результаты регистрации землетрясения в заливе Аляска. Установлено влияние удаленных землетрясений на акустическую активность горного массива, которое проявляется в виде значительного увеличения количества акустических событий и их энергии после регистрации сейсмической волны. Выявлено, что наличие деформационных и сейсмических волн от удаленных землетрясений можно отнести к дополнительным факторам, инициирующим деформационные процессы в горном массиве. Своевременная регистрация данных волн и корректная их интерпретация позволят значительно повысить достоверность прогноза энергетических геодинамических событий в удароопасных массивах горных пород при разработке месторождений в целях предотвращения катастрофических событий.The article presents experimental investigations on the detection of slow waves intensifying geomechanical processes in rock massif, with the application of highsensitivity laser measurements. The results of experimental research for the evaluation of remote earthquakes impact on the condition of rock massif of Streltsovskoe ore field, registration of remote earthquakes and their forerunners are given. The results of the earthquake in the Gulf of Alaska, is represented in the article. The influence of distant earthquakes on the rock mass acoustic activity, which manifests itself in the form of a significant increase in the number of acoustic events and their energy after the registration of a seismic wave, is established. It is revealed that the presence of deformation and seismic waves from distant earthquakes can be attributed to additional factors that initiate deformation processes in the rock massif. Timely recording of these waves and their correct interpretation will significantly improve the accuracy of the prediction of energy geodynamic events in shockhazardous rock masses when developing fields in order to prevent catastrophic events.

scholarly journals Design of a device for rocks strength properties determining to solve the tasks of rock rock-cutting machines design

2018 ◽  
Vol 224 ◽  
pp. 02084
Author(s):  
Leonid T. Dvornikov ◽  
Viktor A. Korneyev
Keyword(s):  
Particle Size ◽  
Energy Intensity ◽  
Average Particle Size ◽  
Rock Cutting ◽  
Strength Properties ◽  
Rock Massif ◽  
Average Particle ◽  
Mining Engineering ◽  
Rock Destruction ◽  
Cis Countries

The article presents methods for rocks strength properties determining in mining machines engineering in Russia, CIS countries and Europe. It is shown that general drawback of methods considered is lack of possibility of carrying out instant tests at various points in rock massif. Criteria are given for the method of rocks strength properties determining as applied to mining engineering tasks. Based on established criteria, the fundamentally new method has been developed. Technical devices are proposed for the method implementation in testing individual samples and rock massif. Construction of the laboratory stand estimating energy intensity of rock destruction is presented. Relationship between its value, coefficient of strength according to the M.M. scale of Protodyakonov and average particle size of the destroyed rock is shown.

Improving the Efficiency of Drilling and Blasting Operations for High Water Cut Conditions

2020 ◽  
Vol 836 ◽  
pp. 124-130
Author(s):  
M.A. Marinin ◽  
V.V. Dolzhikov ◽  
V.A. Isheyskiy
Keyword(s):  
Rock Mass ◽  
Groundwater Level ◽  
Water Saturation ◽  
High Water ◽  
Practical Experience ◽  
Rock Massif ◽  
Drainage Systems ◽  
Modeling And Forecasting ◽  
High Water Cut ◽  
Water Cut

The article discusses the experience of drilling and blasting operations in the conditions of high water cut of the rock massif, it also presents practical experience in modeling and forecasting water inflows into workings. By the example of the Koashvinskoe deposit, the problems of work in conditions of high water cut of the rock mass leading to the collapse and silting of drilled boreholes are considered. The article presents calculations showing the effectiveness of the drainage systems for lowering the groundwater level of a prepared rock mass section. The paper provides a rationale for the optimal mass of bottom charges for the preparation of drains in the rock mass, depending on the water saturation of the mass and the grid of drilled boreholes.

scholarly journals Substantiating rational parameters of a method for shrinkage ore stoping while developing thin-vein steeply inclined deposits

2018 ◽  
Vol 60 ◽  
pp. 00022 ◽  
Author(s):  
Leonid Shyrin ◽  
Yevhenii Koroviaka ◽  
Valerii Rastsvietaiev ◽  
Oleksandr Denyshchenko
Keyword(s):  
Shock Wave ◽  
Wave Propagation ◽  
Rock Mass ◽  
Intermediate Layer ◽  
Blast Hole ◽  
Field Studies ◽  
Low Density ◽  
Practical Relevance ◽  
Vein Wall ◽  
Hole Charge

Objective of the paper is to substantiate rational ore-stoping technique while using small wells in the context of thin-vein steeply inclined deposit mining. The technique is based upon the repeated field studies and simulation of ore drawing processes for shrinkage ore stoping in terms of the oriented drilling of periphery holes. A design of a blast-hole charge with low-density porous intermediate layer has been proposed as a result as well as a mechanism of shock-wave propagation within rock mass in the process of thin steeply inclined vein stoping. Scientific novelty is represented by means of analytical results of scientific sources, and dependences of ore losses on the vein wall hypsometry resulting from shrinkage stoping in the context of the technique being proposed. Practical relevance is to substantiate rational parameters of the ore-stoping technique being proposed. The technique involves designs of blast-hole charges with low-density porous intermediate layer in stemming. Moreover, the technique proposes to place the intermediate low-density stemming layer right after a blast hole was charged with explosives and live primers were inserted.

THE EXPERIENCE OF PLUGGING A MINE SHAFT UNDER CONDITIONS OF MANIFESTATION OF MODERN GEODYNAMIC ACTIVITY

2021 ◽  
Vol 4 (1) ◽  
pp. 341-351
Author(s):  
T.Sh. Dalatkazin ◽  
Keyword(s):  
Rock Mass ◽  
Water Pressure ◽  
Rock Massif ◽  
Entire Period ◽  
Mine Shaft ◽  
Significant Volume ◽  
Expected Result ◽  
Geodynamic Processes ◽  
Backfill Materials ◽  
Geodynamic Activity

The paper presents the results of studying of the effectiveness of water pressure in the shaft of a mine with the use of grouting are presented. The enclosing rock massif is character-ized by simple hydrogeological conditions and moderate manifestation of modern geodynamic activity. Despite the significant volume of the performed backfill measures, the expected result was not obtained due to the underestimation of modern geodynamic processes when choosing the backfill materials. In the conditions of a geodynamically active rock mass, the plugging ma-terial must retain plasticity throughout the entire period of operation.

IMPROVEMENT OF BLAST-HOLE DRILLING METHODS FOR ROCK MASS PREPARATION AT THE ENTERPRISES OF "UK KUZBASSRAZREZUGOL" OJSC

Ugol ◽  
2015 ◽  
pp. 24-31
Author(s):  
S.V. Matva ◽  
◽  
S.V. Kokin ◽  
Yu.I. Litvin ◽  
S.I. Protasov ◽  
...  
Keyword(s):  
Rock Mass ◽  
Blast Hole ◽  
Hole Drilling

scholarly journals Management of geomechanical processes - the basis for selecting the optimal technologies for the development of mineral deposits

2018 ◽  
Vol 56 ◽  
pp. 02005
Author(s):  
Anatolii Kozyrev ◽  
Iuliia Fedotova ◽  
Eduard Kasparyan
Keyword(s):  
Rock Mass ◽  
Stress State ◽  
Rock Massif ◽  
Mineral Deposits ◽  
Mining Operations ◽  
Mining Technology ◽  
Geomechanical Monitoring ◽  
Gas Dynamic ◽  
Natural Stress ◽  
Mining Methods

When carrying out mining operations, a rock massif responds to technological impacts in the form of developing strains and fractures. Under certain conditions, this response occurs as dynamic and gas dynamic destructions of rocks with intensive release of energy, which creates threats to security and disrupts a working technology. To substantiate the optimal mining technology, which would be maximum adequate to the specific geological and geomechanical conditions of a deposit development, it is necessary to organize a comprehensive monitoring of geomechanical processes in rock massifs. The paper considers general principles to organize the geomechanical monitoring under conditions of the hierarchically-blocked rock massifs in the gravitational-tectonic field of the natural stress state. The authors give main recommendations for managing geomechanical processes in the rock mass for various mining methods.

scholarly journals Complex spectral-acoustic monitoring of the state of fluid-saturated coal-rock mass

2020 ◽  
Vol 168 ◽  
pp. 00059
Author(s):  
Yurii Pylypenko ◽  
Iryna Konstantynova ◽  
Kchichtof Оzet
Keyword(s):  
Acoustic Emission ◽  
Roof Rock ◽  
Experimental Studies ◽  
Rock Massif ◽  
Complex Stressed State ◽  
Rock Destruction ◽  
Saturated Rock ◽  
Control Research ◽  
Coal Rock

Subject of the research is the methods for monitoring properties and state of coal-rock massif. This work is an experimental validation of the studied parameters of acoustic emission occurred during destruction of the roadway roof. Elements of the theory of acoustic emission control, research methods, results and experimental studies of the fluid-saturated rock destruction were studied. In this article, methods of studying and interpreting the results of geophysical observations of the process of the roof rock stratification and fall at caving of the undermined rocks at a complex stressed state are presented. Biseds, approaches to solving the problems of managing and controlling the dynamics of changes in the stress-strain state of the undermined fluid-saturated coal-rock massif based on factors of autocorrelation between the seismic-acoustic phenomena occurred over time are described. Experimental grounds are given to the complex control methods with determination of the level of disintegration by the Fourier estimation of the amplitude-frequency and amplitude-time spectra.

scholarly journals Quality of mineral wealth as a factor affecting the formation of refuse of ore mining and processing enterprises

2018 ◽  
Vol 56 ◽  
pp. 04018
Author(s):  
Svetlana Chrykhalova
Keyword(s):  
Rock Mass ◽  
Production Factor ◽  
Mining Operations ◽  
Material Efficiency ◽  
Mineral Wealth

Studies are carried out to estimate the amount of refuse generated in mining operations in conditions of deteriorating ore quality. The introduction of static material efficiency is suggested, which shows how much of the extracted rock mass is the finished product (concentrate) and the refuse production factor at mining and processing enterprises.

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