scholarly journals PREDICTION OF ROCK PRESSURE EFFECTS IN MINE WORKINGS IN THE ZONE OF LONGWALL FACE INFLUENCE

10.31713/m930 ◽  
2020 ◽  
Author(s):  
Mykhailo Didenko
Keyword(s):  
Rock Pressure ◽  
Longwall Face ◽  
Pressure Effects ◽  
Mine Workings

scholarly journals Classification of Theories about Rock Pressure

2018 ◽  
Vol 277 ◽  
pp. 157-167 ◽  
Author(s):  
Oleh Khomenko ◽  
Maksym Kononenko ◽  
Janchiv Bilegsaikhan
Keyword(s):  
Physical Properties ◽  
Rock Pressure ◽  
Mine Working ◽  
Physical Processes ◽  
Classification Feature ◽  
The World ◽  
Underground Mine Working ◽  
Mine Workings ◽  
Energy Theory

The first classificationsw of physical properties of rocks and hypotheses of rock pressure in the world practice are analysed. The analysis of internationally widely known theories about rock pressure and physical processes around mine workings is executed. Classification of theories about rock pressure on classification feature “condition of investigated massif” is constructed. The energy theory that describing capsulation by the massif of underground mine working is offered.

Evaluation of the influence of aerodynamic aging of production on aerological risks on coal mines

2020 ◽  
pp. 74-83 ◽  
Author(s):  
O. V. Skopintseva ◽  
S. V. Balovtsev
Keyword(s):  
Rock Pressure ◽  
Average Rate ◽  
Coal Mines ◽  
Entire Period ◽  
Risk Indicator ◽  
Average Value ◽  
Rate Of Increase ◽  
Mine Workings ◽  
Aging Factor

The results of a study of the aerodynamic aging of mine workings are presented. It is established that the local workings located in the zone of active manifestation of rock pressure are most deformed. The average rate of increase in their resistance reaches 0.0112 N×s2 / m9×yr, and the degree of increase in their resistivities over 4-9 years of existence reaches 7-8 times. The rate of aging of the mine workings is much lower than that of the local workings, averaging 0.0014 N×s2/m9×year for the inclined workings on average over the entire period of their existence, and 0.0009 N×s2/m9×year for horizontal ones. The degree of increase in the resistivity of capital workings for 12-25 years of their existence reaches 3 times. The workings were ranked by relative aerological risk indicator Rac by aerodynamic aging factor. The calculations showed that the average value of the relative aerological risk indicator for the aerodynamic aging factor of the Rac mine workings for the local haul drifts was 0.541; for precinct ventilation drifts - 0.842; for capital inclined workings - 0.172; for capital horizontal workings - 0.101. When assessing the risk of gassing of workings, it is necessary to take into account data on the aerodynamic aging of mine workings.

scholarly journals Self-regulating roof-bolting with the rock pressure energy use

2018 ◽  
Vol 60 ◽  
pp. 00009 ◽  
Author(s):  
Oleh Khomenko ◽  
Maksym Kononenko ◽  
Ihor Kovalenko ◽  
Denys Astafiev
Keyword(s):  
Rock Pressure ◽  
Energy Use ◽  
Entropy Method ◽  
Underground Mine ◽  
Zonal Disintegration ◽  
Resource Saving ◽  
Roof Bolting ◽  
Underground Mine Workings ◽  
Mine Workings ◽  
Zonal Disintegration Phenomenon

The perspective of discovery of zonal disintegration phenomenon of rocks around underground mine workings is analyzed. The methodological stages for research of this phenomenon are shown. The physics of zonal disintegration of rocks around underground mine workings is disclosed. There are described the possibilities of advanced entropy method and developed energy method that allow to investigate a phenomenon of zonal capsulation of underground mine workings. The sequence of research of this phenomenon parameters is presented. The order of choice of stable shape and resource-saving support in underground mine workings is substantiated, for the deep horizons of the Kryvorizkyi Iron-Ore Basin mines. The method of parameters calculation of self-regulating roof-bolting in underground mine workings is substantiated, which allows to use the rock pressure energy. The design of a self-regulating roof-bolting is developed, which allows applying metal, polymer and rope bolts. The economic efficiency of rock pressure energy usage is substantiated in case of support setting at great depths in underground mine workings.

scholarly journals Experimental Studies about Characteristics of the Rocks Displacement and State of Bearing Pressure on the Haulage Roadway

2019 ◽  
Vol 105 ◽  
pp. 01008
Author(s):  
Duc Thang Pham ◽  
Hung Thang Hoang ◽  
Victor Vitcalov
Keyword(s):  
Rock Pressure ◽  
Roof Rock ◽  
Experimental Studies ◽  
Coal Seams ◽  
Coal Basin ◽  
Mining Depth ◽  
The Face ◽  
Mine Workings ◽  
Roof Rocks ◽  
Quang Ninh

Comprehensive studies were conducted using measuring stations to measure the rock pressure and displacements of the roof rocks in the mine workings adjacent to the face when extracting medium thick inclined coal seams with the use of longwall (seam 6 at the Quang Hanh mine of Quang Ninh coal basin, Vietnam). The results of the study show that the displacement of the roof rock on the parallel roadway increases sharply at a distance of 1 to 12 m to the face, varies from 20 to 40 mm when the mining depth of the coal seam is 200 m and the maximum rock pressure on the haulage roadway supports is located at a distance of 3–8 m ahead of the face and is from 14 to 16 tons ranges.

scholarly journals Forecast for the formation of zones of high rock pressure in the conditions of mining ore deposits in a combined way

2019 ◽  
Vol 129 ◽  
pp. 01021
Author(s):  
Marina Potapchuk ◽  
Boris Saksin ◽  
Aleksandr Sidlyar ◽  
Andrey Tereshkin ◽  
Maksim Rasskazov
Keyword(s):  
Rock Pressure ◽  
Ore Deposits ◽  
Open Pit ◽  
Eastern Region ◽  
Structural Elements ◽  
Ore Bodies ◽  
Mine Workings ◽  
The Stability ◽  
Far Eastern ◽  
Underground Method

The prospect of mining the majority of deposits in the Far Eastern region is associated with the need to switch from the open-pit to the underground method of developing deep-lying ore bodies. Ensuring the safest conditions for the combined development of the field is possible only after comprehensive studies have been carried out that make it possible to establish the peculiarities of the formation of the stress state in the rock mass taking into account the influence of various natural and technogenic factors. An assessment of the stability of structural elements of the proposed development systems at the deposits will allow identifying potentially impact hazardous areas and developing measures to maintain and protect mine workings, which will reduce the risk of dynamic manifestations of rock pressure.

scholarly journals Development of a methodology for assessing the expediency of mine workings decommissioning based on the geomechanical factor

2021 ◽  
pp. 10-16
Author(s):  
I.A. Salieiev ◽  
V.I Bondarenko ◽  
H.A Symanovych ◽  
I.A Kovalevska
Keyword(s):  
Rock Pressure ◽  
Mine Working ◽  
Negative Influence ◽  
Dispersion Analysis ◽  
The State ◽  
Entire Period ◽  
Synthesis Methods ◽  
Mine Closure ◽  
Geological Conditions ◽  
Mine Workings

Purpose. Substantiation of the methodology for predicting the state of mine workings based on the study on geomechanical processes when assessing the consequences of mine closure taking into account the entire period of their existence, during which the development of displacement with various intensity occurs in the surrounding coal-bearing mass. Methodology. The study is based on methods of analysis and synthesis, methods of comparison, abstraction, analogy, calculation and construction. The methods of mine tool observations of the manifestations of rock pressure and their processing by methods of correlation and dispersion analysis for establishing the relationship of displacements of the mine working contour with geomechanical factors were used. Findings. A possibility of stage-by-stage decommissioning of mine workings when grouping mining-and-geological conditions is substantiated. An example of calculating the displacements in a mine working during its decommissioning is presented. The given calculation expressions make it possible to assess the mine working state, taking into consideration the patterns of the geomechanical factor influence on making a technical decision on the expediency of its further operation. Originality. The patterns of the rock pressure manifestation development in sequentially abandoned mine workings have been determined. Based on the methods of correlation-dispersion analysis, the dependence of the mine working contour displacements on geomechanical factors have been revealed throughout the entire period of its existence. Practical value. A methodology for assessing the state of mine workings at the time of their decommissioning has been developed, which is an integral part of the recommendations to limit the negative influence of mine closure. The peculiarity of the methodology is in taking into account the entire period of mine workings existence, which leads to a well-grounded technical decision on the possibility of dismantling the metal structures with the complete exclusion of emergency situations.

PRACTICAL RECOMMENDATIONS FOR CARRYING OUT HORIZONTAL AND INCLINED WORKINGS ON ROCKS PRONE TO HEAVING

2021 ◽  
Vol 4 (1) ◽  
pp. 436-443
Author(s):  
V.V. Melnik ◽  
◽  
V.N. Shcherbakov
Keyword(s):  
Rock Pressure ◽  
Point Of View ◽  
Mine Workings ◽  
Practical Recommendations ◽  
Technical Recommendations

The conducted studies have revealed two important, from the point of view of opera-tion, phenomena of the manifestation of rock pressure in the mine workings passed through the heaving rocks. The dependence of determining the magnitude of rock heaving in the bottomhole space is proposed. Practical mining technical recommendations for preventing rock heaving are made.

Reducing rock pressure effects during working of thick steeply dipping seams with stowing

1971 ◽  
Vol 7 (1) ◽  
pp. 21-23
Author(s):  
N. I. Yakovlev ◽  
R. P. Bolotov ◽  
G. I. Chuntu
Keyword(s):  
Rock Pressure ◽  
Pressure Effects
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