Investigations of the regularity of the formation of a dip over the mine

Dolzhikov, Peter; Prokopov, Albert; Prokopova, Marina; Hamidullina, Natalya

doi:10.1051/matecconf/201819603008

Cited by 12 publications

(5 citation statements)

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“…Such phenomena are caused by changes in physical and mechanical properties and are similar to technogenic processes occurring during the formation and development of sinkholes on the earth's surface [4]. According to the studies [5], the main characteristics of soils that affect the risk of failure are their moisture content and strength characteristics: specific adhesion and angle of internal friction. The settlement of pile foundations is also affected by the mode of their operation and the deformation characteristics of soils lying at the base of the conditional foundation (under the "heels" of the piles).…”

Section: Resultsmentioning

confidence: 99%

The use of piles with an adjustable operation mode to restraint the shaft sinking systems’ supporting structures

2021

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The article deals with the problem of ensuring the stability of grillages and pile foundations used to hold shaft sinking systems during the construction of vertical subway shafts. The features of such foundations’ operation in the process of shaft sinking are investigated, in contrast to similar structures that receive pressure from a building under construction. The importance of taking into account the mutual influence of shaft sinking and pile foundations of the shaft sinking systems’ supporting structures is shown. The design of bored piles and the technological scheme of mortar injection are proposed, which provide a change in the operating mode of pile foundations and regulation of its bearing capacity.

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Section: Resultsmentioning

confidence: 99%

The use of piles with an adjustable operation mode to restraint the shaft sinking systems’ supporting structures

2021

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“…Experimental studies have been carried out [1] to develop a reliable, efficient, and easily applicable way to close cavities by layered backfilling with burnt rock and plugging slurry; the studies also helped formulate the latter [1].…”

Section: Methodsmentioning

confidence: 99%

“…Large-scale closure of coal mines in mining areas frequently causes mining-related environmental incidents attributable to many factors, including supra-opening surface cavities [1].…”

Section: Introductionmentioning

confidence: 99%

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Plugging slurry (backfill) and surface cavity closure technology

et al. 2020

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The purpose of the study is to study mining and environmental emergencies associated with the formation of sinkholes of the earth’s surface over mining workings after the mass closure of coal mines and to develop a new method for eliminating the sinkhole. The study used a method of physical modeling, which investigated the influence of humidity on the deformation properties of burnt rocks used as a filler in the manufacture of plugging and filling suspensions, while establishing the dependence of the relative deformation of dump rocks on the load at their natural humidity and water saturation. The main results of the research are: a new method for eliminating dips in the earth’s surface over the inclined opening workings of the liquidated coal mines of the Eastern Donbass; formulations of plugging and filling suspensions used for layer-by-layer filling of sinkholes and providing non-shrink laying.

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“…Издательство «Мир науки» \ Publishing company «World of science» http://izd-mn.com виброграмм колебаний [15][16][17]. Акселерометры были установлены в четвертях и в середине пролета по обеим сторонам моста и по оси проезжей части, чтобы выявить возможные формы колебаний (рис.…”

Section: Sats122unclassified

Urban bridges studies on dynamic impacts from urban rolling stock

Khamidullina

2022

Russian journal of transport engineering

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The article is dedicated to the actual dynamic impact study of rolling stock on urban bridges. The requirements for recording the dynamic impact specified in domestic and foreign regulatory documents are considered. Using a mobile measuring complex, the results of which determine the natural frequencies of vertical, horizontal transverse, and horizontal longitudinal vibrations. The technique used in the experiment allows us to obtain initial data for the dynamic calculation of structures, to clarify the real rolling stock dynamics depending on the state of the rail track on the bridge. Urban rolling stock is a relevant and necessary type of public transport that meets modern city requirements. The bridge crossings construction will ensure the connection of the urban areas separated by obstacles into a single network. When designing such structures, it is important to take into account the effects of actual dynamic coercitive forces. The dynamics study allows, on the one hand, to reasonably set the dynamic loads impact on bridges, on the other hand, to diagnose the structures state by dynamic parameters. In this work, using a specialized mobile measuring complex, the authors measured the oscillation parameters on moving vehicles. As a conducted experimental studies result, a methodology for determining the dynamic characteristics of a moving load and directly urban bridges has been demonstrated. As a result of the conducted experimental studies, it can be concluded that the proposed method allows obtaining initial data for the dynamic analysis of structures for the transport load. In addition, fixing the transport load dynamic impact during operation allows you to clarify the real rolling stock dynamics, depending on the state of the rail track on the bridge.

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Investigations of the regularity of the formation of a dip over the mine

Cited by 12 publications

References 1 publication

The use of piles with an adjustable operation mode to restraint the shaft sinking systems’ supporting structures

The use of piles with an adjustable operation mode to restraint the shaft sinking systems’ supporting structures

Plugging slurry (backfill) and surface cavity closure technology

Urban bridges studies on dynamic impacts from urban rolling stock

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