Application of the strain energy to estimate the rock load in squeezing ground condition of Eamzade Hashem tunnel in Iran

Dehkordi, M. Soleiman; Shahriar, K.; Moarefvand, Parviz; Gharouni-Nik, Morteza

doi:10.1007/s12517-011-0417-1

Cited by 17 publications

(6 citation statements)

References 19 publications

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“…In the process of ore deformation and destruction, energy transfer and release are key factors [19,20]. From a mechanical point of view, the deformation and destruction process of rock is actually a process from local dissipation to local destruction and finally to the overall disaster.…”

Section: Unloading Local Energy Release Eorymentioning

confidence: 99%

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Research on Evolution Characteristics of Unloading Energy in Excavation Face of High-Stress Pillar

Liu

Sun

Feng

et al. 2022

Shock and Vibration

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In the mining process of the stage empty field subsequent filling mining method, aiming at the problem of unloading failure and instability of the excavation face of the high-stress ore pillar, the theory of unloading stress component is introduced and combined with the energy release theory to explore the unloading failure mechanism of the excavation face of the ore pillar. The results show the following. (1) The degree of accumulation of strain energy in the pillar is related to the tangential stress. After the peak of the tangential stress, the energy changes from accumulation to release, indicating that energy release is the main cause of pillar damage. (2) In pillar unloading, there are 4 typical characteristic areas of stress during the loading process: crushing area, shaping area, elastic area, and original rock stress area. The energy accumulation area and the stress component area show good correspondence, and they all appear from the top to the bottom of the pillar. At 1/4, the starting point of unloading failure can be determined. (3) The mutation mechanism in the process of energy release is related to the time effect of tangential stress. On the contrary, the greater the tangential stress is, the longer the elastic zone lasts, and the more significant the energy accumulation is. Also, the increase in tangential stress will lead the energy release time becomes shorter, and a large amount of accumulated energy is released in a short time, causing local instability and destruction of the pillar, and eventually spreads to the whole.

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Section: Unloading Local Energy Release Eorymentioning

confidence: 99%

“…According to formula (20), the distribution curve of each stress component of the pillar at different heights from the top pillar is calculated.…”

Section: Research On Transient Unloading Energy Release Of Pillar Under the Action Of Backfillmentioning

confidence: 99%

Research on Evolution Characteristics of Unloading Energy in Excavation Face of High-Stress Pillar

Liu

Sun

Feng

et al. 2022

Shock and Vibration

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“…Assuming the failure criterion of Hoek and Brown, based on Seeber's condition, the relation between the confinement pressure and the uniaxial compressive strength σ c , of the intact rock can be obtained [6,16,17]. This relation can be approximated by: where, m b is the product of a parameter m depending on the lithology, with a reduction factor depending on the degree of fracturing of the rock.…”

Section: Figmentioning

confidence: 99%

“…The deformation modulus, E rm , can be obtained from Hoek and Diederichs approach according to Eq. 15 because more effective factors on deformability such as the elastic modulus of intact rock, E i , disturbance factor, D, and GSI are used in this equation [8,16,17].…”

Section: Figmentioning

confidence: 99%

Application of TBM operational parameters to estimate the drop modulus, case study: Karaj–Tehran water conveyance tunnel of Iran

Lazemi

Dehkordi

2016

Geo-Engineering

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“…Much elastic energy is stored in rock mass, and deeper buried depth leads to more energy. Many scholars have paid attention to energy storage characteristics of rocks [1][2][3][4]. Affected by excavation, the stress and strain will redistribute, resulting in rock damage and destruction.…”

Section: Introductionmentioning

confidence: 99%

Rockburst Prediction on the Superimposed Effect of Excavation Accumulation Energy and Blasting Vibration Energy in Deep Roadway

Xiang

2021

Shock and Vibration

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In deep mining, much elastic energy is stored in rock mass due to the high geostress. Rockburst will be induced by accumulated energy during excavation. Meanwhile, because of blasting vibration energy in the host rock, there will be an obvious superimposed effect on the probability and intensity of rockburst. To explore the most reasonable and effective method for understanding rockburst problem under blasting, a deep roadway of Sanshandao gold mine was studied. On the basis of in situ geostress data, the accumulated energy of three-centered arch roadway after quasi-static excavation was derived. Then, a series of in situ blasting vibration were monitored, and the blasting vibration energy was calculated by employing the equivalent theory of elastic vibration boundary. Finally, the tendentiousness of rockburst was evaluated qualitatively with the superimposed energy. The results indicated that the disaster-driven energy was increased by 45.1% and 28.2% on different places of roadway. Also, the probability and intensity of rockburst would be raised.

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Application of the strain energy to estimate the rock load in squeezing ground condition of Eamzade Hashem tunnel in Iran

Cited by 17 publications

References 19 publications

Research on Evolution Characteristics of Unloading Energy in Excavation Face of High-Stress Pillar

Research on Evolution Characteristics of Unloading Energy in Excavation Face of High-Stress Pillar

Application of TBM operational parameters to estimate the drop modulus, case study: Karaj–Tehran water conveyance tunnel of Iran

Rockburst Prediction on the Superimposed Effect of Excavation Accumulation Energy and Blasting Vibration Energy in Deep Roadway

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