Stress measurements in soft rocks

Corthésy, Robert; Leite, M.H.; Gill, D.E.; Gaudin, B

doi:10.1016/s0013-7952(03)00072-3

Cited by 14 publications

(5 citation statements)

References 12 publications

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“…Using the finite element method, it is possible to determine an approximate pattern of the mining-induced stresses and fracture propagation. The method has been widely used by many researchers, including Obara et al (2000), McKinnon (2001), Corthesy et al (2003), Hart (2003), Aksoy et al (2006), Xu et al (2006), andYang et al (2007).…”

Section: Introductionmentioning

confidence: 99%

Finite element modeling of stress distributions and problems for multi-slice longwall mining in Bangladesh, with special reference to the Barapukuria coal mine

Islam

Hayashi

Kamruzzaman³

2009

International Journal of Coal Geology

140

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Section: Introductionmentioning

confidence: 99%

Finite element modeling of stress distributions and problems for multi-slice longwall mining in Bangladesh, with special reference to the Barapukuria coal mine

Islam

Hayashi

Kamruzzaman³

2009

International Journal of Coal Geology

140

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“…Bizjak and Petkovšek [5] suggested that the settlement of vault is most prominent after the excavation of a soft rock tunnel and timely construction of a reverse arch and closed lining can effectively reduce the displacement of the tunnel. Corthésy et al [6] developed a modified doorstopper technique and affirmed its advantages in soft rock engineering. Shin et al [7] proposed a preliminary guideline for evaluating the protection zone of the blast vibration and utilized a numerical method for dynamic modeling of a tunnel in soft rocks.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation into the Bedding Plane Slip Effect on the Overlying Strata Behavior in Longwall Top Coal Caving of Soft Coal Seam

Liu

Zhang

Zhou

et al. 2019

Advances in Civil Engineering

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Bedding plane shear slip becomes more obvious in rock strata with quite different mechanical properties. A composite beam model considering the behaviors of the main roof and the immediate roof in the “three-soft” coal seam is established based on physical similarity simulation experiments and the slip theory in this paper. The movement and failure of the overlying strata and the mechanism of the bedding plane slip at the 2211 working face are studied by experimental and theoretical analysis. The results suggest that the front abutment stress distribution occurs 50 m ahead of the working face, the initial caving interval of the main roof is 55 m, and the peak stress appears at a distance 20 to 32 m ahead of the working face. The bedding plane slip areas can be divided into the obvious slip area and the slight slip area along the mining direction. The range of the obvious slip area becomes wider and the range of the slight slip area grows to be narrower as the working face advances. The bedding plane slip becomes steady after gradual increase and leads to the subsidence of the overlying strata in the “three-soft” coal seam. The observed initial caving interval of the main roof by field measurement is 51 m, which is consistent with the results of physical similarity simulation experiments and theoretical analysis. The results demonstrate that the beam slip model proposed in this paper is reasonable and able to describe the behaviors of overlying strata and bedding plane slip.

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“…Rock stresses originate from gravity and tectonic forces and can only be inferred by drilling a borehole, making a slot and coring the rock [1]. A large number of stress measuring methods have been developed and a detailed summary of these techniques can be found in Amadei and Stephansson [2], Ljunggren et al [3], Corthésy et al [4], and Ulusay [5].…”

Section: Introductionmentioning

confidence: 99%

“…Although hydraulic tests on preexisting fractures (HTPF) can determine the 3D stress tensor by testing a large number of fractures along the borehole [8][9][10], it is not an efficient method due to its assumptions. Borehole relief method [11][12][13] would be strongly influenced by the stress path, constitutive law, and associated parameters in the interpretation of stress measurement [4]. Other stress measuring methods such as borehole breakout [14] and Kaiser effect [15], which estimate rock stresses based on the phenomenon relevant to stresses, have relatively low reliability and are controversial as a method to determine in situ stress.…”

Section: Introductionmentioning

confidence: 99%

Analytical Investigation for In Situ Stress Measurement with Rheological Stress Recovery Method and Its Application

Liu

Jiang

Zhang

et al. 2016

Mathematical Problems in Engineering

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In situ stress is one of the most important parameters in underground engineering. Due to the difficulty and weakness of current stress measurement methods in deep soft rock, a new one, rheological stress recovery (RSR) method, to determine threedimensional stress tensor is developed. It is supposed that rock stresses will recover gradually with time and can be measured by embedding transducers into the borehole. In order to explore the relationship between the measured recovery stress and the initial stress, analytical solutions are developed for the stress measurement process with RSR method in a viscoelastic surrounding rock. The results showed that the measured recovery stress would be more close to the initial stress if the rock mass has a better rheological property, and the property of grouting material should be close to that of rock mass. Then, the RSR method, as well as overcoring technique, was carried out to measure the in situ stresses in Pingdingshan Number 1 coal mines in Henan Province, China. The stress measurement results are basically in the same order, and the major principal stresses are approximately in the direction of NW-SE, which correlates well with the stress regime of Pingdingshan zone known from the tectonic movement history.

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Stress measurements in soft rocks

Cited by 14 publications

References 12 publications

Finite element modeling of stress distributions and problems for multi-slice longwall mining in Bangladesh, with special reference to the Barapukuria coal mine

Finite element modeling of stress distributions and problems for multi-slice longwall mining in Bangladesh, with special reference to the Barapukuria coal mine

Experimental Investigation into the Bedding Plane Slip Effect on the Overlying Strata Behavior in Longwall Top Coal Caving of Soft Coal Seam

Analytical Investigation for In Situ Stress Measurement with Rheological Stress Recovery Method and Its Application

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