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Impact of pressure of surrounding medium on plain water jet cutting of rocks
The International Journal of Advanced Manufacturing Technology, 2016The goal of this contribution is to investigate problems connected with the application of plain water jets in surroundings between jet outlet and target differing from standard atmosphere. Two cases are especially interesting from the practical viewpoint.
Josef Poláček, Eva Janurová
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Effect of creep of concrete and surrounding rocks on the stress in pressure-tunnel linings
Hydrotechnical Construction, 19721. Rock creep is an unfavorable factor leading to a considerable increase of tensile stresses in a pressuretunnel lining. On the contrary, concrete creep leads to a decrease of tensile stresses in the lining, but the practical use of this circumstance is possible only under conditions of a gradual increase of tunnel pressure to the operating ...
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Study on the Mining Induced Stress of Hard Surrounding Rock under Dynamic Pressure
Advanced Materials Research, 2014There is a series of features of the strata-pressure behavior of hard surrounding rock which is affected by dynamic pressure, such as the caving of the roof is difficult, sudden and large-area. In this paper we focus on the mining and support of 14-1103 working face, In view of the problems of the mine such as the roof is hard to caving, the suspension-
Ji Ping Liu +5 more
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2011 International Conference on Electric Technology and Civil Engineering (ICETCE), 2011
Domestic and foreign scholars have made untiring researches and brought out many research productions on the theoretical calculation method on surrounding rock pressure of tunnel. From the various yield criterion, stress-strain relationship and different modulus in tension and compression of rock and soil, it makes a discussion and evaluation about the
Hong-hu Yuan, Zhi-yin Wang
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Domestic and foreign scholars have made untiring researches and brought out many research productions on the theoretical calculation method on surrounding rock pressure of tunnel. From the various yield criterion, stress-strain relationship and different modulus in tension and compression of rock and soil, it makes a discussion and evaluation about the
Hong-hu Yuan, Zhi-yin Wang
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Blast Vibration Response of Tunnel Influenced by Confining Pressure and Surrounding Rock Type
Applied Mechanics and Materials, 2014Based on the finite element model of the tunnel, dynamic response of tunnel is studied influenced by different confining pressure and different surrounding rock types under of blasting vibration under blast vibration load. The results show that when the confining pressure increases, the maximum horizontal and vertical vibration velocity, stress and ...
Tie Jun Tao +3 more
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Stress calculation of unlined pressure tunnel surrounding rock in hydraulic engineering
2013 2nd International Symposium on Instrumentation and Measurement, Sensor Network and Automation (IMSNA), 2013In hydraulic engineering, the running state of pressure diversion tunnel directly affects the normal use and economic benefit of the whole project. This paper bases on the deep-lying circular tunnel and analyse stress distribution in the unlined hydraulic tunnel surrounding rock by using the finite element method, respectively study the stress after ...
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Physics of Fluids
In order to identify the pressure arch of the surrounding rock in shallow-buried rock tunnels and quantitatively evaluate its global stability, a boundary identification index α and a global safety factor S of the pressure arch were proposed. When α is the change rate of the ratio of radial and tangential stresses, and the value of α at the extreme ...
Wei-teng Li +7 more
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In order to identify the pressure arch of the surrounding rock in shallow-buried rock tunnels and quantitatively evaluate its global stability, a boundary identification index α and a global safety factor S of the pressure arch were proposed. When α is the change rate of the ratio of radial and tangential stresses, and the value of α at the extreme ...
Wei-teng Li +7 more
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Discussion on the Calculation Method of the Deep Buried Tunnel Surrounding Rock Loose Pressure
Applied Mechanics and Materials, 2012Adopted the load-structure model to tunnel structure design calculation, our country often use surrounding rock pressure experience calculation formula, This paper analysed the problems existing in the experience calculation formula and calculated the surrounding rock pressure have influence on calculation results of tunnel structure internal force ...
Yong Feng Yun, De Lun Wu
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Elastic Stresses in the Rock Surrounding Pressure Tunnels
Transactions of the American Society of Civil Engineers, 1923openaire +1 more source