New technical solutions in the field of protection and fastening of mine workings

Yalanskyi, Anatolii; Slashchov, Ihor; Makeiev, Serhii; Seleznov, Anatolii

doi:10.1088/1755-1315/970/1/012015

Cited by 3 publications

(2 citation statements)

References 17 publications

(21 reference statements)

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“…In order to prevent emergency situations in mine roadways, it is necessary to maintain them in an equilibrium state [25][26][27]. In steady and quasi-steady modes of operation, it is possible to reduce the risks of system destruction, since these modes make the system to rest or move along the intended trajectory.…”

Section: Fuzzy Logic Methods For Risk Management In a Complex Mining ...mentioning

confidence: 99%

“…-identifying of internal environment (the enterprise organizational structure, personnel management and distribution of responsibilities); -identifying of external environment (for mining technologies -parameters of geological environment, methods and means of conducting mining operations); -monitoring of the production environment and process control (in particular, visual, instrumental and geophysical methods of mine control [25]); -risk identification (specifying of "what", "where", "when" and "why" it may occur); -risk analysis (determining the probabilities of negative events and predicting possible consequences); -risk assessment (comparison of the consequences of geomechanical processes -falls, shifts of rocks, etc., with the criteria of stability and reliability of the mining system elements);…”

Section: Risk Management Technologies For Ensuring Safety Of Mining E...mentioning

confidence: 99%

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Fuzzy logic methods for risk management at mining enterprises

Slashchova

Yalanskyi

Slashchov

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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To prevent emergencies at mining enterprises, a model of controlling stability of geotechnical system by fuzzy logic methods was developed based on the data fuzzification, inference and defuzzification. The main principles were formulated for the identification of specific features of dangerous production facilities in mining industry. To determine the input parameters for the fuzzy logic model, the systematization of uncontrolled (mining and geological) and controlled (technical and technological) parameters, the presence or change of which affects the stability of the rock massif and roadways, was carried out. The application of such methods as aggregation, implication, defuzzification was substantiated for processing input signals. An algorithm of fuzzy logic inference was formed to control parameters of a geotechnical system. The model differs by its ability to adapt to the specifics of controlling the geotechnical system “support - rock massif” and to select logical rules depending on the established criteria.

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Section: Fuzzy Logic Methods For Risk Management In a Complex Mining ...mentioning

confidence: 99%

Section: Risk Management Technologies For Ensuring Safety Of Mining E...mentioning

confidence: 99%

Fuzzy logic methods for risk management at mining enterprises

Slashchova

Yalanskyi

Slashchov

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

Self Cite

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Communication and technological solutions regarding the construction of shelter objects at underground railway stations in fractured and water-logged rocks

Bulat,

Krukovskyi,

Kurnosov

et al. 2023

Geoteh. meh.

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The purpose of the work is to substantiate the choice of locations of underground shelter objects for the people protection during the warlike situation and methods and facilities for ensuring their stability and isolation, and to develop a combined supporting scheme taking into account mining and geological conditions. It is proposed to arrange the shelter objects in the vicinity of the boarding platforms of the underground railway stations connecting them with the passages, means for walking downstairs and upstairs and a transport network and providing areas for the long-term stay of people, areas for sleeping and eating, shower room, medical, shopping and other necessary blocks. The shelter should be connected to the networks of the underground railway station - electricity supply, water supply and drainage, ventilation and air conditioning. Sleeping areas should be built in the form of individual compartments and arranged in several tiers along the walls of the shelter object. This arrangement of underground objects will make it possible to create a single complex (the shelter object and subway station), reduce the total cost of the shelter construction, speed up the evacuation of people in the event of natural or man-made disasters or air strikes, and ensure a long-term comfortable stay for people. Load on supporting and parameters of roof-bolting systems were calculated for three categories of stability, which correspond to the conditions of the construction of underground railways in the Ukrainian crystalline shield. An algorithm for calculating parameters of the strengthened insulating-reinforcing protection system was built, which takes into account three types of support - rock-bolt structure, insulating-reinforcing rock-polymer layer and tubing. The developed technological solutions for the construction of underground objects assumes pre-bolting of their vaulted part according to a scheme which strengthens the interaction between the rows of bolts, improves the condition of the roof of the object, and ensures protection of the roadway and unsecured part near it during construction of the roadway. The rock-polymer layer protects the tubing against metal corrosion and leaching of concrete under the influence of groundwater, and, due to the high adhesiveness of the polymer resin, also binds the rock-bolt structure, the insulating-reinforcing rock-polymer layer and the tubing into a single reinforced system, which distributes the load around the object's perimeter. The use of modern elastic polymer resins in the protection system will contribute to resisting the alternating loads that spread in the soil during surface explosions, and ensures long-term stability and waterproofing of shelter object. The results of the research can be used in the development of scientific prerequisites for the improvement of methods and means of construction of underground shelter objects in order to ensure the safety of their operation in case of emergency situations. Keywords: underground structures, underground railway station, support, bolts, polymer resins.

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Identification of Geomechanical and Geotechnical Structures Using the Vibroacoustic Method for Automated Stability Monitoring Systems of Ground Buildings and Mine Workings

Yalanskyy,

Bielikov,

Barabanov

et al. 2023

JDMI

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Purpose. Identification of geomechanical and geotechnical structures by vibroacoustic method to improve reliability and automation level of ground buildings and mine working stability monitoring. Methods. Classical wave theory, experimental studies in laboratory and field conditions. Results. The most important feature of acoustic wave propagation in fractured media is the complexity of the wave pattern, since at each boundary between adjacent layers four new waves are formed – two reflected (longitudinal and transverse) and two refracted, each of them, when falling on another boundary, will cause a similar process. In the near-surface layer, classical acoustic waveguides are formed – sections of rock limited in one or two directions by voids, cracks or other media. As a result, the divergence of waves to the sides is eliminated or reduced, so their propagation along the layers occurs with less attenuation than in an unbounded homogeneous or inhomogeneous medium. To control elements of geomechanical and geotechnical structures, normal waves (modes) propagated in such acoustic waveguides without changing their structure should be used. When upper limit of the frequency range for recording acoustic signal of the response of a plane-parallel or block structure to the applied shock is lowered, the range of possible sounding bases expands. Within this range, the first mode of normal resonant oscillations is registered, and its limits shift towards an increase of the absolute value. The identification of geomechanical and geotechnical structures for systems of automated vibroacoustic control of stability of the mine workings was carried out. Originality. It is established that system control is ensured by identifying local geomechanical objects as the systems with lumped parameters, and changes in the load of the system elements should be controlled by analyzing the compliance between parameters of the system’s response to the exciting stimulation and the quasi-stationary criterion. In contrast to the known methods, automated control should be carried out with taking into account the stages of the oscillatory process development. Practical implications. The research results contribute to improvement of reliability and automation of the ground buildings and mine working stability monitoring. Keywords: vibroacoustic methods, identification of geomechanical structures, ground buildings and mine workings stability, automation of mine workings stability monitoring.

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New technical solutions in the field of protection and fastening of mine workings

Cited by 3 publications

References 17 publications

Fuzzy logic methods for risk management at mining enterprises

Fuzzy logic methods for risk management at mining enterprises

Communication and technological solutions regarding the construction of shelter objects at underground railway stations in fractured and water-logged rocks

Identification of Geomechanical and Geotechnical Structures Using the Vibroacoustic Method for Automated Stability Monitoring Systems of Ground Buildings and Mine Workings

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