Informational Articles

Big data formation and using has become one of the most important directions in the XXI century technology development. This led to approaches revision for modeling objects and processes, as well as predicting their state with changing environmental factors and operating conditions. In the article we have discussed the Big data accumulation opportunities and prospects in the mining industry, in particular the mining facilities state monitoring.

The authors describe the results of application and characteristics of the method of route geometry parameters design calculations. The article also presents case studies of the Topocad package application in mine surveying in construction of main line tunnels from Ramenky Station to Lomonosovsky Prospekt Station of Moscow Metro. The analysis has been made of the advantages of the Topocad software package as compared with similar software packages and calculation methods.

The modeling of scenarios for the location of a new ore pass was performed based on an integrated approach taking into account physical and mechanical properties of rocks forming the rock mass, with the tests of rock cores sampled in boreholes drilled in the area under consideration. Alongside with the tests, a detailed geotechnical description of the rock mass was prepared, and domains were allocated for modeling with finite-element setting.

As ecosystems of nearly all geographic zones are exposed to technologyrelated effect, and the scale of this effect is global, the restoration of derelict lands is viewed today primarily as ecological restoration – restoration of natural ecosystems for sustainable development of the biosphere.

The article describes the solution of the applied research task of finiteelement modeling-based geotechnological grounding of the development of mineral deposits confined to tectonic faults. Based on the modeling with the CAE Fidesys software suite the authors have performed calculations for the identification of safe points of mine take access and development, and direction of the working face front advance, with due account for tectonic faults; as well as estimation of the necessity of the creation of protected zones, and their respective patterns, parameters and methods; elaboration of interim recommendations on the order of development of contiguous ore bodies in vertical and horizontal planes; estimation of the feasibility of slicing and room-and-pillar methods with backfilling for the development of the deposit site under consideration. For the analysis of the rock mass stress-strain behavior (SSB) the authors have used the finite-element method (FEM), because it is widely recognized as a reliable and reasonable tool for modeling of such tasks. Calculations have been performed for elastic-plastic deformation conditions based on the Drucker–Prager (DP) plasticity model with hardening. The finite-element modeling with the CAE Fidesys software suite is actually an efficient tool for the assessment of stresses and strains, which may occur in deep mine workings.

The authors present the results of modeling of stress-strain behavior of the adjacent virgin rock and pit deposits with dirt partings

The article discusses the application of acoustic methods of routine monitoring of coal-rock mass hazardous in terms of gas and coal dust outbursts and rock bumps, with three compulsory procedures: hazard risk forecast, application of hazard risk management method if the hazard is predicted by the forecast, and monitoring of the efficiency of the implemented method. Seismic scanning, acoustic emission (AE) and spectral-acoustic methods are analyzed. The authors prove that seismic scanning method is helpful for the detection of faults formed ahead of a driven working – one of the significant factors of outburst hazard. AE method can be reasonably used for the monitoring of poorly caving roof and/or coal seam hydrotreatment, which is accompanied by the development (growth) of fractures emitting acoustic emission pulses. Spectral-acoustic method is efficient for the monitoring of the face area stress state before and after implementation of a gas and dust outburst and rock bump hazard management method (for instance, hydrotreatment efficiency monitoring). The research was funded through a grant from the Russian Science Foundation (Project No. 17-17-01143)

At hazardous production facilities, such as coalmines, there are two groups of tasks: the first - increasing the efficiency of the production process and the implementation of the plan, the second - reducing the rates of industrial injuries, ensuring the safety of work and personnel. The decisive importance for the performance of both of them is the communications. In most cases, communication systems both on the surface and on underground are implemented based on computer networks. This is, first, due to the worldwide trend in the development of the concept of multi-service networks. Research and Production Company GRANCH develops and manufactures data transmission systems and network mobile devices for the development of multiservice networks, which serve as the basis for the multifunctional safety systems of coalmines and a number of production management systems. The product line is expanding; new devices are emerging, which undoubtedly expand the capabilities of networks and operating solutions. The multiservice networks of the GRUNCH Company include both equipment used as the basic network nodes that make up the network infrastructure and portable individual devices that perform the function of the clients in the network. This article provides an overview of the new mobile devices produced by GRUNCH Company, gives recommendations on their use in coalmines.

The importance of the problem of dynamic accumulation of mining technology-related wastes dictate the necessity of the elaboration of the efficient and innovatively attractive approach to the assessment, recovery and use of useful mineral components. For the efficient solution of this most important problem it is necessary to design an algorithm, which main objective is the assessment of technologyrelated resources with due account for the concentration of useful components. For the assessment of mining technology-related wastes the selection of advanced monitoring methods is required. One of such methods implies the use of unmanned aerial vehicles (UAV).