THEORETICAL FOUNDATIONS FOR THE CREATION OF A «FRAME» GEOTECHNOLO-GY FOR UNDERGROUND DEVELOPMENT OF SUBSURFACE RESOURCES

2021 ◽  
Vol 4 (1) ◽  
pp. 295-304
Author(s):  
Yu.P. Galchenko ◽  
◽  
V.A. Eremenko ◽  
Keyword(s):  
Stress Field ◽  
Theoretical Study ◽  
Underground Mining ◽  
Field Development ◽  
Variable Volume ◽  
Technological Paradigm ◽  
External Contour ◽  
Subsurface Exploration ◽  
Dynamic Structures ◽  
Theoretical Foundations

A physical model of the process of underground ore mining is substantiated and it is shown that ensuring the geomechanical safety of subsurface development is associated with the technological capabilities of nature-like mining technologies for the reproduction of stable dy-namic structures in the lithospheric objects being worked out. A cognitive analysis of typical geotechnologies is carried out and it is shown that the modern geo-technological paradigm is based on the principles of combining in time the processes that generate a geomechanical dis-turbance in the lithosphere and the processes to overcome the consequences of this disturb-ance. The internally insoluble contradiction of this approach is revealed and it is shown that overcoming this contradiction opens up a very real prospect of creating a fundamentally new concept for the development of underground mining technologies based on the implementation of the global idea of nature-like technologies in the form of the concept of creating convergent mining technologies. With the use of the proposed and developed by prof. The Rodionov model of the lithosphere as a solid body with different-scale inhomogeneities performed a theoretical study of the features of the stress field development during the formation of inhomogeneities with variable volume and zero density and found that in this case, the conditions for the repro-duction of stable dynamic structures will be determined by processes on the external contour of inhomogeneities. This made it possible to substantiate the geophysical and geotechnological ideas of a new technological paradigm of subsurface exploration.

Nature-like mining technology as a potentially monumental resolution of environmental contradictions during the development of solid mineral deposits

2020 ◽  
pp. 63-67
Author(s):  
Yu. P. Galchenko ◽  
◽  
G. V. Kalabin ◽  
Keyword(s):  
Industrial Development ◽  
Biological Systems ◽  
Essential Elements ◽  
Environmental Crisis ◽  
Russian Science ◽  
Mining Technology ◽  
Field Development ◽  
Technological Paradigm ◽  
Technical Systems ◽  
The Creation

The antagonistic contradiction between the biological essence of man and the abiological ways in which he obtains energy from the Sun for the creation of a food base and personal habitat is the determining factor shaping the image of our technocratic civilization. In order to address this contradiction in the development of the mineral and raw materials complex, it is necessary that the requirements for environmental security not be imposed on individual operations or processes but form the basis of a promising technological paradigm. In this way, the conservation of the Earth’s natural biota becomes a requirement and an inherent feature of the technologies created and applied. It seems abundantly clear that from a methodological point of view, technological responses to environmental challenges should be sought in the study of systems where these answers have already been obtained. Namely, these answers present themselves in biological systems taking form in nature-like technologies. Recent changes in public consciousness have inevitably led to the greener thinking in all spheres of human activity. The most illustrative ref lection of this phenomenon is the growing interest in nature-like technologies, which are associated with the main aspirations in the settling of a global environmental crisis generated by a long-term antagonistic confrontation between the technosphere and the bio- sphere. In considering the concept of nature-like technologies as a designation of the principal trend in the modernization of the general technological paradigm, it is necessary to distinguish two specific areas. Depending on whether or not the technologies that we use are present or absent in wildlife, we must first consider the construction of technologies by duplicating effective processes already observed in wildlife in the technosphere (nature-reproducing technologies) and, secondly, the creation of technological systems by transferring the effective functional structure of the circulation of matter and energy in biological systems to the technosphere (convergent technologies). The general theory of the creation of “similar to nature“ technologies is presented, based on the well-known principles of homeostatics - methods of maintaining the vital parameters of the interaction of natural and technical systems by controlling the contradictions between antagonists. The main directions of the structural and functional convergence of technical and biological sciences are identified when updating the technological paradigm of industrial development, based on the reproduction in the technosphere of systemic solutions that ensure the functioning of complex biological systems. Regarding the ecologization of the technological paradigm of the mineral resource complex, the methodology of creating an ecologically balanced technology as a multiobject cluster is based on the well-known principles of homeostatics, i.e., on the phased formation of a technological homeostat on the basis of the structure of a biological homeostat with the replacement of its essential elements with geotechnological target analogues. The result of this transformation is the construction of a convergent mining technology for integrated field development. Its use will ensure the development of technical systems that make it possible to limit external environmental impacts owing to the postexploitation self-restoration of natural biota phytocoenoses. The study was supported by the Russian Science Foundation, Project No. 19-17-00034.

scholarly journals Participatory Heritage On Social Networking Sites: The Discussion of Main Theoretical Concepts

2021 ◽  
Vol 91 ◽  
pp. 100-119
Author(s):  
Ingrida Kelpšienė
Keyword(s):  
Cultural Heritage ◽  
Social Networking ◽  
Social Networking Sites ◽  
Theoretical Study ◽  
Theoretical Concepts ◽  
Heritage Studies ◽  
Practice Based Research ◽  
Collaboration And Communication ◽  
Theoretical Considerations ◽  
Theoretical Foundations

The field researching cultural heritage communication on social networking sites, is still developing its theoretical foundations, while participatory heritage, as one of the newest concepts born in this field, is still lacking its grounded conceptualization, especially emerging from practice-based research studies. This theoretical study suggests to integrate different theoretical considerations that derives from cultural heritage studies, social networking sites research and theory of participation, and proposes to refine the concept of participatory heritage believing that the primary understanding of the context as “participatory” lies not in the environment itself, but in the activity that takes place in it. Therefore, I offer that participatory heritage could be understood as a new shift in cultural heritage practice that emerge through collaboration and communication of people on social networking sites.

scholarly journals A Model of Anisotropic Property of Seepage and Stress for Jointed Rock Mass

2013 ◽  
Vol 2013 ◽  
pp. 1-19 ◽  
Author(s):  
Pei-tao Wang ◽  
Tian-hong Yang ◽  
Tao Xu ◽  
Qing-lei Yu ◽  
Hong-lei Liu
Keyword(s):  
Rock Mass ◽  
Stress Field ◽  
Underground Mining ◽  
Principal Direction ◽  
Water Pressure ◽  
Jointed Rock ◽  
Jointed Rock Mass ◽  
Surrounding Rock ◽  
Metal Mine ◽  
Roadway Stability

Joints often have important effects on seepage and elastic properties of jointed rock mass and therefore on the rock slope stability. In the present paper, a model for discrete jointed network is established using contact-free measurement technique and geometrical statistic method. A coupled mathematical model for characterizing anisotropic permeability tensor and stress tensor was presented and finally introduced to a finite element model. A case study of roadway stability at the Heishan Metal Mine in Hebei Province, China, was performed to investigate the influence of joints orientation on the anisotropic properties of seepage and elasticity of the surrounding rock mass around roadways in underground mining. In this work, the influence of the principal direction of the mechanical properties of the rock mass on associated stress field, seepage field, and damage zone of the surrounding rock mass was numerically studied. The numerical simulations indicate that flow velocity, water pressure, and stress field are greatly dependent on the principal direction of joint planes. It is found that the principal direction of joints is the most important factor controlling the failure mode of the surrounding rock mass around roadways.

Steel Catenary Riser Response Characterization With On-Line Monitoring Devices

2009 ◽  
Author(s):  
Metin Karayaka ◽  
Wolfgang Ruf ◽  
Shreenaath Natarajan
Keyword(s):  
Monitoring System ◽  
Analytical Models ◽  
Steel Catenary Riser ◽  
Field Development ◽  
Critical Dynamic ◽  
On Line ◽  
Offshore Industry ◽  
Complex Monitoring ◽  
Dynamic Structures ◽  
Monitoring Devices

Steel Catenary Risers (SCR) are critical dynamic structures with a complex fatigue response. The offshore industry lacks verification of analytical models with full-scale response measurements. Only a small number of installed SCRs have any instrumentation to monitor dynamic response. This paper describes an on-line monitoring system deployed on one of the Tahiti infield (production) SCRs. Tahiti is a Truss Spar Floater located in 4,000 ft water depth in the Gulf of Mexico. The system is configured with localized strain and motion measurement devices. Emphasis is placed on the selection of number and location of the monitoring devices to characterize vessel induced riser response, VIV induced riser response, riser-seabed interface, and discontinuities at the riser hang-off locations. Monitoring device sensitivity requirements and qualification programs are also discussed. The monitoring system configuration drivers are reviewed in detail such as; monitoring objectives, instrumentation requirements, specification and architecture, field development integration, and installation. Information provided in this paper would be helpful for configuration of complex monitoring systems for deepwater steel catenary rises.

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