ABOUT THE STRESSED-DEFORMED STATE OF SIDE ROCKS IN COMPLEX MINING-GEOLOGICAL CONDITIONS
Journal Title: Вісник Кременчуцького національного університету імені Михайла Остроградського - Year 2018, Vol 1, Issue 108
Abstract
Purpose. To study stability of the coal seam roof rocks which rely on a wide supple support or backing array when external forces affect them. The nature and location of the external force depends on the nature of their stress-strain state and the mine workings state. Methodology. A complex method using the basic provisions of the theory of elasticity, depending on the physical and mechanical properties, dimensions and shape of the girder beam as the main bearing element of underground structures has been used. Results. The destruction of the developed coal seam roof, as the main load-carrying element of the coal-bearing massif, in complex mining and geological conditions, ultimately results from the bending of the rock layers when the maximum rock basset values have been reached. Originality. As a result of applying a bookmark of the worked out space and the resulting compressive forces over the bottom hole space, a stable arch forms above the mine workings, and behind it a smooth deflection of the stratified rock strata is ensured. When the length of the beam is 5–10 times greater than the thickness of the roof stratified rocks, when calculating the stress-strain state of the side rocks to predict the stability of mine workings, shear forces can be neglected. Practical value. Development of measures aimed at increasing the stability of mine workings in the development of coal seams in difficult mining and geological conditions has been carried out. Сonclusions. In order to prevent sudden collapses of lateral rocks in the development of steep coal seams, one should be guided by the use of a universal method for controlling rock pressure and protecting mine workings has been proved. References 17, figures 7.
Authors and Affiliations
I. Yordanov, D. Chepiga, A. Polozhij, V. Dovgal
Keywords
Related Articles
- EP ID EP659480
- DOI 10.30929/1995-0519.2018.1.79-86
- Views 87
- Downloads 0
USE OF MODERN INTERNET TECHNOLOGIES FOR HISTORICAL RESEARCH
Purpose. The modern database of historical documents that are on the Internet and information services for working with primary sources are diverse and are constantly being improved. The sources of historical research in...
INITIATION LOCAL ACCUMULATIONS OF METHANE SHOCK WAVE IN THE AIR ACCIDENTAL EXPLOSIONS IN MINES
Purpose. Improving the safety of emergency work in mines with the risk of explosions and mine atmosphere by tak- ing into account the initiation site impact of explosion and combustion regime in the safe distances calcul...
MODIFICATION OF THE FORMS OF SERVICES PROVIDED BY HIGHER EDUCATION ESTABLISHMENTS
Purpose. The problems of the development of higher education are related to the activity of higher education establishments that are the basic link of the education process. The changes in the exter...
APPLICATION OF ASCA FOR THE PURPOUSES OF IDENTIFICATION AND ASSESSMENT SOURCES OF HARMONIC DISTORTION
Purpose. One of the most important components of the electricity market is its instrumental support, which is a set of systems, appliances, devices, communication channels, algorithms, etc. for monitoring and controlling...
PROFILE GEAR GRINDING TEMPERATURE DETERMINATION
Purpose. To establish the mathematical dependences for determining instantaneous grinding depths values, the heat flux density at any point of the grinding wheel involute profile and the grinding temperature on the basis...