Exploration of Underground Structures in the Holy Trinity Danilov Monastery by Muon Radiography Method

2021 ◽  
Vol 48 (6) ◽  
pp. 175-180
Author(s):  
N. S. Konovalova ◽  
A. S. Konovalov ◽  
N. M. Okateva ◽  
N. I. Starkov ◽  
T. V. Shchedrina
2021 ◽  
Vol 84 (6) ◽  
pp. 855-859
Author(s):  
A. B. Alexandrov ◽  
S. G. Vasina ◽  
V. I. Galkin ◽  
L. A. Goncharova ◽  
A. S. Konovalov ◽  
...  

The study of the transport and capture of particles moving in a fluid flow in a porous medium is an important problem of underground hydromechanics, which occurs when strengthening loose soil and creating watertight partitions for building tunnels and underground structures. A one-dimensional mathematical model of long-term deep filtration of a monodisperse suspension in a homogeneous porous medium with a dimensional particle retention mechanism is considered. It is assumed that the particles freely pass through large pores and get stuck at the inlet of small pores whose diameter is smaller than the particle size. The model takes into account the change in the permeability of the porous medium and the permissible flow through the pores with increasing concentration of retained particles. A new spatial variable obtained by a special coordinate transformation in model equations is small at any time at each point of the porous medium. A global asymptotic solution of the model equations is constructed by the method of series expansion in a small parameter. The asymptotics found is everywhere close to a numerical solution. Global asymptotic solution can be used to solve the inverse filtering problem and when planning laboratory experiments.


2015 ◽  
Vol 1 (1) ◽  
pp. 13-20
Author(s):  
Hamid Reza Samadi ◽  
Mohammad Reza Samadi

Due to the development of cities as well as rapid population growth, urban traffic is increasing nowadays. Hence, to improve traffic flow, underground structures such as metro, especially in metropolises, are inevitable. This paper is a research on the twin tunnels Of Isfahan's metro between Shariaty station and Azadi station from the North towards the South. In this study, simultaneous drilling of subway's twin tunnels is simulated by means of Finite Difference Method (FDM) and FLAC 3D software. Moreover, the lowest distance between two tunnels is determined in a way that the Law of Super Position could be utilized to manually calculate the amount of surface subsidence, resulted by drilling two tunnels, by employing the results of the analysis of single tunnels without using simultaneous examination and simulation. In this paper, this distance is called "effective distance". For this purpose, first, the optimum dimensions of the model is chosen and then, five models with optimum dimensions will be analyzed separately, each of which in three steps. The results of analyses shows that the proportions (L/D) greater than or equal 2.80, the Law of Super Position can be applied for prediction of surface subsidence, caused by twin tunnels' construction


2020 ◽  
Vol 54 (1-3) ◽  
pp. 253-279
Author(s):  
Jennifer B. Spock

Abstract The study of monasticism in Russia has found new acolytes since the dissolution of the Soviet Union. With the separation of the Soviet republics, religion became, and continues to become, a vibrant subfield of Russian studies. This article examines the problems inherent in attempting to grasp the day-to-day life of monks and monasteries given their individual characteristics, social classes, roles, and the wide variety, yet often limited scope, of various texts and material objects that can be used as sources. The vast source base is an embarrassment of riches in one sense, but problematic in another as prescriptive and normative texts must be understood in context. One important element that has not been directly addressed is the cacophony of sound, the interruptions, and the distractions of the constant activity of expanding cloisters in the sixteenth and seventeenth centuries. How did monks maintain their spiritual path and pious duties when on service expeditions outside the monastery: when engaged in salt-production, fishing, trade, rent-collecting, or other activities outside its walls? How intrusive were building projects, which abounded in the period, or even efforts to adorn the churches? How strict was oversight, or how weak? Such questions still need answers and can only be fully understood by integrating diverse source bases. This article uses Solovki, Holy Trinity, and Kirillov monasteries to exemplify the problems that remain in understanding the daily lives of monastics and their adherents within and without the confines of the cloister.


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