Development of digital technologies for the systems of remote mining safety monitoring

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The article discusses the features of fastening preparatory workings in difficult geological conditions, which are studied in three directions: improving concrete, arch and anchor fasteners with the consideration of the initial physical and mechanical properties of the rock mass; introduction of steel-polymer anchor; improvement of cast strips designs in combination with arch and anchor fasteners for reuse. Protection methods of mine workings and means of fastening often do not correspond to the peculiarities of the manifestation of rock pressure at the end sections of lavas and in zones of tectonic disturbances, as a result of which can become the main cause of the unsatisfactory state of the mine workings. Mathematical modeling of the rock massif stress-strain state has been carried out by the finite element method. Rigid and pliable cast strips, various technologies for erecting a cast strip, as well as a combination of cast strips with anchor and arch fasteners are modeled. The locations and sizes of rocks destruction zones, stresses in the rock mass for different options of fastening have been determined. The drawbacks of the existing technologies for the construction of cast strips are revealed and the factors for increasing their technical efficiency are established.

Section: Methodsmentioning

confidence: 97%

“…The calculations of the stress-strain state were carried out using the finite element method on a computer complex developed at IGTM NASU [3,7,8,23]. Stable elastoplastic solutions, taking into account residual strength, are usually achieved in 10-100 iterative cycles.…”

Section: Methodology Of Mathematical Modelingmentioning

confidence: 99%

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

Yalanskyi

Slashchov

Makeiev

et al. 2022

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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%

“…Today, various technical means are available for the implementation of control systems that use the methods and algorithms of intelligent systems. Control systems containing neural networks, elements of evolutionary models and fuzzy controllers based on fuzzy logic methods are being developed and implemented [4][5][6][7][8][9][10]. The term "fuzzy logic" was proposed by Lotfi Askar Zadeh in his theory of fuzzy sets [4,11].…”

Section: Introductionmentioning

confidence: 99%

“…The fuzzy logic method was first used in the works of scientists of the M.S. Poliakov Institute of Geotechnical Mechanics of the NAS of Ukraine [6][7][8]10] to solve mining problems including labor protection and to assess the risks for the mine roadways to lose their stability. As a result of the studies, it was for the first time when a phase controller based on intelligent control methods was proposed and tested to prevent emergency situations in the "support-rock massif" system.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Fuzzy logic methods for risk management at mining enterprises

Slashchova

Yalanskyi

Slashchov

et al. 2023

Self Cite

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.

Regularities of rocks zonal disintegration and methane emissions periodicity in mine roadways

Slashchov,

Bielikov,

Slashchova

et al. 2024

The article presents the results of studies on the establishment of stable relationships between methane emissions into degassing wells and their spatial location, stress-strain state of rock massif and mining operations process. Vibroacoustic and electrometric of mine control methods have been used to establish zoning and alternation of fractured zones in the rock massif during mining operations. Using the finite element method, zones of different permeability in the roof above the longwall face were determined, and a qualitative transition from compressive deformations to tensile deformations was revealed. Based on data from mine experiments at 157 degassing wells, patterns of repeatability of rocks zonal disintegration and periodicity of gas emissions into mine roadways depending on the distance to the moving longwall face have been determined for the first time. It has been established that the concentration of methane gas in a wells with distance from the longwall face changes according to a damped quasi-periodic dependence with recombinant changes in stress-strain states. For wells aimed at the goafs, the period of the quasi-periodic function increases by 40%, the amplitude decreases to 30%. The obtained dependencies make it possible to increase the efficiency of degassing.