Evaluation methods of interconnected geomechanical and gas dynamic processes in the rock massif for the systems of working medium control in the mines

Bulat, A.F.; Slashchov, I.N.; Slashchova, Ye.A.

doi:10.15407/geotm2017.134.003

Cited by 14 publications

(6 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…At the Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine, work is underway to improve mining safety systems [3,4] involving geomechanical models and methods for assessing scenarios for the development of situations. Maintaining the equilibrium state of the geotechnical system, as an object of management, provides for the control of the system parameters values from the equilibrium point and the rate of change of this deviation.…”

Section: Resultsmentioning

confidence: 99%

“…Geotechnical systems are monitored for safety of mining operations under partial uncertainty of the rock massif behavior under load, irregularity and randomness of the distribution in space of the properties and structural features of rocks, variety characteristics of roadways supporting and other poorly predictable factors [3]. Unfortunately, in the mining and processing industries, the approaches to the development of management systems are still deeply conservative, which is connected with the need to ensure safe and trouble-free operation of technical systems in the difficult conditions of the development of deposits at great depths, danger of sudden emissions of rocks and gases.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Substantiation of fuzzy logic algorithms for control problems of a geotechnical systems

Slashchov

Yalanskyi

2019

E3S Web Conf.

View full text Add to dashboard Cite

The article presents results of study of intelligent fuzzy logic algorithms developed on the basis of fuzzy logic methods for information system of the mine safety system. In order to prevent emergency situations caused by the lost geotechnical system stability due to the uncertain behavior of the rock mass, a new fuzzy controller was designed which could generate an additional control signal. For the fuzzy controller, methods of data fuzziness, inference and de-fuzziness were validate, and linguistic rules were designed in order to control parameters of the geotechnical system. With the help of the Cauchy problem solved by Runge-Kutta method of the 4th order, designed a software model of the proposed system which simulated the system operation. The model has proved operability and static stability of the developed algorithms. Output signal of the fuzzy controller can be used as information for estimating risk for geotechnical systems, preventing possible emergency situations and, consequently, can improve job safety in the mines.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Substantiation of fuzzy logic algorithms for control problems of a geotechnical systems

Slashchov

Yalanskyi

2019

E3S Web Conf.

View full text Add to dashboard Cite

show abstract

“…Methodology for organization of computational processes, methods and algorithms for determining parameters of zoning and spatial orientation of fracture system development in the rock massif; methods for constructing the structures and software models of information systems for developing basic elements for software and information technology for geomechanical process calculation by the finite element method; mathematical modeling of the rock-massif stress-strain state by the finite element method; analysis and assessment of parameters of fracture systems in the structurally-heterogeneous rock massif performed with the help of information system "GEO-RS © " developed under the guidance and with direct participation of the author [6][7][8].…”

Section: Methodsmentioning

confidence: 99%

Estimation of fracture systems parameters in rock massif by the finite element method

Slashchov

2019

E3S Web Conf.

View full text Add to dashboard Cite

Results of analytical, laboratory and mine studies of parameters of disintegration zones in structurally-heterogeneous rocks and fracture systems around of the deep mine roadways are presented. A mathematical model is proposed, which is realized with the help of the procedures of simulation modeling by finite element method. Based on the calculation of possible directions of the rock shearing (the “rock shear sites”) and breakage of bonds between the elements, the model allows determining orientation of dominant master fracture system development with taking into account natural structural defects in the rock massif. A new algorithm was created for determining master cracks and boundaries of disintegration zones with the layered rock, which differs by determining directions of rock shear sites in the elastoplastic problem considering residual strength and main structural defects of the structurally-heterogeneous rock massif. Regularities of organization of unidirectional rock shear sites and their distribution under the influence of mining operations in zones with inelastic deformations were established.

show abstract

“…Initial parameters for physical and mechanical properties of the watered gassaturated rock mass are presented in (Slashchova, Slashchov, & Yalanskiy, 2014;Yalanskiy, Sapunova, Slashchov, & Novikov, 2014;Ikonnikov, Ikonnikov, Slashchova, Slashchov, & Yalanskiy, 2015). Mathematical modeling of geomechanical and gas-seepage processes with the help of finite element method was carried out by using the computing complex (GEO-RS © computing complex development and software implementation of the system functions were carried out on the basis of studies conducted by the (Bulat & Slashchov, 2012;Slashchov, Shevchenko, & Slashchov, 2013;Bulat, Slashchov, & Slashchova, 2017).…”

Section: Methodsmentioning

confidence: 99%

Forecast of potentially dangerous rock pressure manifestations in the mine roadways by using information technology and radiometric control methods

Slashchov¹,

Shevchenko²,

Kurinnyi³

et al. 2019

Min. miner. depos.

View full text Add to dashboard Cite

Purpose. To reduce risk of emergency and injury-risk situations while improving the methods for predicting stressstrain state of the rock mass with the help of information systems, and to detect fissure locations in the mine roadways with the help of radiometric control.Methods. Analysis and generalization of experimental data; mathematical modeling of geomechanical and filtration processes by means of the finite element method; underground investigations of changes in activity of α-radiation of certain radon-isotope in the atmosphere of the mine roadways using standard methods as well as radiometric control equipment; and statistical processing of measurement results.Findings. Ratios, determining correlation between parameters of geomechanical process (i.e. fracture porosity, inclination angles of the fracture networks and their strike) and parameters of gas-dynamic process (i.e. intensity, gas flow rates and direction of gas travel) have been obtained. A mathematical model based on the finite element method is proposed in which a reasonable assumption is made that deformation of the pore medium is equal to the varied volume of the pore and fracture area. In the context of the model, deviation part of the strain tensor determines changes in the shape of the rock mass elements during disintegration. Spherical part of the strain tensor characterizes changes in volume and permeability of the pore and fracture area; it is determined by a value of minimum principal strains of the model elements. Parameters of the pore and fracture area location, volume and permeability were substantiated in the rock mass. The mine investigations have helped determine that within the areas of geological dislocations, concentration of radon daughter decay product of alpha-radiation polonium (Po 218 ) experiences more that 2 -4 times increase in relation to the roadway average value. On the basis of the criterion, it is proposed to use radiation monitoring of the mine roadways to identify areas of newly formed fracture systems resulting from fracture system deformation as one of the elements of method for the integrated control of the rock mass state. Originality. For the first time, regularities of changes in the pore and fracture area shape and volume at different stages of the adjacent longwall mining have been determined basing on parameters of technogenic fracture system orientation and spherical part of the strain tensor. The method of controlling the safe state of rocks has been further developed; it differs in the use of the determined ratios between changes in fracture system parameters and changes in α-radiation activity of some radon isotopes, methane concentrations and their correlation.Practical implications. The research results have been applied for the development of analytical and experimental approach to control safety of production environment in mines.

show abstract

Evaluation methods of interconnected geomechanical and gas dynamic processes in the rock massif for the systems of working medium control in the mines

Cited by 14 publications

References 0 publications

Substantiation of fuzzy logic algorithms for control problems of a geotechnical systems

Substantiation of fuzzy logic algorithms for control problems of a geotechnical systems

Estimation of fracture systems parameters in rock massif by the finite element method

Forecast of potentially dangerous rock pressure manifestations in the mine roadways by using information technology and radiometric control methods

Contact Info

Product

Resources

About