Serhiienko V., Amelin V., Trypolskyi V. Simulation of work of combined support system in complex mining-and-geological conditions
- Details
- Parent Category: Geo-Technical Mechanics, 2022
- Category: Geo-Technical Mechanics, 2022, № 161
Geoteh. meh. 2022, 161, 116-126
https://doi.org/10.15407/geotm2022.161.116
SIMULATION OF WORK OF COMBINED SUPPORT SYSTEM IN COMPLEX MINING-AND-GEOLOGICAL CONDITIONS
1Serhiienko V., 1Amelin V., 1Trypolskyi V.
1Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine
UDC 622.281
Language: English
Abstract. The purpose of the study was to find out the nature of the deformation for the frame support as part of the combined security system. In addition, our task was to study the destruction of the rock mass around the gateroad. The work was commissioned out by order of the PJSC "CG "Pokrovske"". Previous researches showed that options of mathematical simulation for the combined support system are limited. It is related to by bulky performance of the model as well as nonlinear deformation of separated elements. For this particular study data set on the structure of rock mass around the gateroad has been collected. A rock mass is presented by the seams of coal, siltstone and sandstone. The combined support system comprises a yielding steel arches, an anchor and a filling body. The frame models with different shapes and sections were used. A physical model corresponded to reuse stage of a gob-side entry retaining. The equivalent materials method is used. The simulation scale was 1:50. A wooden shell is designed to contain transverse deformations. The model was loaded on a rigid testing machine in the constant deformation mode. The deformation speed was about 0.05 mm/s. 19 variations of the model were tested with different combinations of support parameters. For every model the ultimate compressive load value was determined. Dependences for gateroad of cross-section area change are obtained on the loading attached. Three particular areas of load-deformation support curve is recorded. These areas are as follows: increasing resistance area, falling resistance area and residual constant resistance area. It has been established that the form of the support is improved with an increase of the links number. The results of the study have showed an increase for the resistance of the support while sprayed concrete is applied to the frame. The study also confirmed the efficiency of the reinforced filling body. For the most severe conditions, the use of a circular frame support is recommended. The results of the study could be applied for the design of direct-flow ventilation systems for the longwall panels of coal mines.
Keywords: coal mine, rock mass, frame support, combined support system, physical modeling.
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About authors:
Serhiienko Viktor, Candidate of Technical Sciences, Senior Researcher, Senior Researcher in Laboratory of Physics and Geomechanical Monitoring of Rocks Mass, Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine (IGTM NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.
Amelin Volodymyr, Master of Science, Principal Technologist in Laboratory of Physics and Geomechanical Monitoring of Rocks Mass, Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine (IGTM NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.
Trypolskyi Valerii, Master of Science, Principal Technologist in Laboratory of Physics and Geomechanical Monitoring of Rocks Mass, Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine (IGTM NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.
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