Present-day stress state and fault stability analysis in the capital area of China constrained by in situ stress measurements and focal mechanism solutions

Peng, Li; Ren, Fenhua; Cai, Meifeng; Guo, Qifeng; Miao, Sheng

doi:10.1016/j.jseaes.2019.104007

Cited by 20 publications

(6 citation statements)

References 50 publications

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“…In terms of seismicity, the Tangshan area, which is close to the Qian'an area, is a well-known earthquake-prone area in North China and has been plagued by numerous destructive earthquakes throughout its long history (Figure 1(a)). Notably, the Tangshan and Luanxian areas experienced Ms 7.8 and Ms 7.1 earthquakes, respectively, in 1976 [8], and small and medium earthquakes frequently occur. In contrast, the seismicity in the Qian'an area is relatively low overall.…”

Section: Geological Setting and Seismicitymentioning

confidence: 99%

“…The principal compressive stress axes of the Tangshan Guye Ms 4.8 earthquake in 2012 and the Tangshan Ms 4.5 earthquake are close to the E-W orientation, and the T -axes approach the S-N direction [32]. Huang and Wan [50], Liu et al [51], and Li et al [8] compiled extensive focal mechanism data in North China and revealed that the principal compressive stress axis is oriented along a general E-W direction, although some local variation in the orientation was observed. The consistency of the stress field direction with the principal compressive stress direction derived from these focal mechanism solutions indicates that the stress tensor not only agrees with earthquakes in this area but also agrees with the concept that the maximum horizontal stress direction is mainly represented by the tectonic principal compressive stress [52].…”

Section: Stress Directionmentioning

confidence: 99%

“…Zoback et al [55] investigated global patterns of the tectonic stress field using plate tectonics theory and noted that the principal compressive stress axis of the Chinese mainland and adjacent blocks is the same as the tectonic motion direction of the peripheral plates, and the tectonic stress field inside the plates is triggered and governed by plate motion. North China is sandwiched between the Indian plate, Eurasian plate, and Pacific plate and is principally dominated by compression caused by the notable collision of the Indian plate with the western Chinese mainland and the subduction of the Pacific plate below the eastern Chinese mainland; the direction of the former is NEE-SWW or approximately E-W, while the latter is oriented NWW-SWW [8]. The mine district is located at the intersection of the compression and subduction zones of these two plates, which jointly affect the stress field pattern in this district.…”

Section: Stress Directionmentioning

confidence: 99%

See 2 more Smart Citations

Current Tectonic Stress State in an Iron Mine District, North China, Based on Overcoring, Hydraulic Fracturing, and Acoustic Emission Stress Measurements

Sun

Cai

et al. 2022

Lithosphere

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Full knowledge of the current tectonic stress state is crucial for assessing open-pit mine slope stability and regional tectonic evolution and geodynamic processes. Overcoring, hydraulic fracturing, and acoustic emission in situ stress measurement techniques were adopted to determine the 3D stress tensor in an iron mine district, North China, and 25 sets of stress data ranging from 56 to 490 m were measured. Accordingly, the current tectonic stress state and its relationship to regional geological tectonics were investigated. The results indicated that the stress condition seemed to favor thrust and strike-slip faulting, and the stress field was particularly controlled by the horizontal tectonic stress. A high horizontal tectonic stress considerably influenced the stability of high and steep slopes in this mine district, which requires great attention. The stress directions derived from different methods were almost similar, indicating a dominant NEE–SWW stress field direction or near-E–W direction, comparable to the direction revealed by focal mechanism solutions and other stress indicators around the mine district. According to geological structure analysis, the present-day stress field in this district generally inherited the third-stage tectonic stress field while partially retaining the characteristics of the second-stage tectonic stress field, which is the result of dynamic action and tectonic movement during different geological periods, and the maximum principal stress direction of the tectonic stress field that affects the modern tectonic activity in this area is the NEE–EW direction.

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Section: Geological Setting and Seismicitymentioning

confidence: 99%

Section: Stress Directionmentioning

confidence: 99%

Section: Stress Directionmentioning

confidence: 99%

See 1 more Smart Citation

Current Tectonic Stress State in an Iron Mine District, North China, Based on Overcoring, Hydraulic Fracturing, and Acoustic Emission Stress Measurements

Sun

Cai

et al. 2022

Lithosphere

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“…In situ measurement of in situ stress is the most direct way to study the tectonic stress field around faults, but it is easily restricted due to the complex and changeable conditions, the long test cycles, and the high costs of in situ tests [16][17][18][19]. In addition, in situ measurements can describe only the local in situ stress, and a limited amount of measurement data cannot accurately reflect the regional stress field, making it difficult to meet the needs of mine engineering design and construction.…”

Section: Introductionmentioning

confidence: 99%

Quantitative Study on the Stress Distribution Characteristics of Coal Rock with Faults

2022

Geofluids

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To quantitatively describe the distribution characteristics of stress field of coal rock in fault area, a finite element model was established to study the influence mechanisms of different fault parameters on the stress distribution characteristics of coal rock and a prediction model of the tectonic stress field of a fault-containing coal rock was established based on the numerical simulations. The numerical simulation results show that the coal rock in the hanging wall of a normal fault forms an area of disturbance significantly larger than that in the footwall of the normal fault and reverse fault. With the increase in fault throw, the stress concentration factor and fault influence range decrease in both the normal and reverse fault scenarios. Additionally, for both the normal and reverse fault scenarios, with the increase in fault dip angle, the coal rock stress concentration zone gradually collapses to the fault plane and the stress concentration coefficient gradually increases due to the reduction in the area of pressure relief. The prediction model of the tectonic stress field can better describe the quantitative relationship between the fault parameters and the stress of coal rock, which can provide guidance for the excavation design of mining engineering and early warning for possible coal and gas outburst disasters.

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“…An accurate estimation of in-situ geo-stresses is critical for the reliable design and regular operation of underground rock-engineering projects. Various stress measurement approaches in rocks are present, most of which are nevertheless time-consuming and uneconomic, such as hydraulic fracturing and overcoring methods [1][2][3][4][5][6]. Moreover, these approaches may lack adequate accuracy [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Assessment of Appropriate Experimental Parameters for Studying the Kaiser Effect of Rock

Chen

Meng

et al. 2020

Applied Sciences

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The Kaiser effect of rock has been extensively studied due to its wide application in in-situ stress measurement and rock damage quantification. The uniaxial cyclic loading and unloading (UCLU) test is commonly employed to examine the rock Kaiser effect. However, how the two critical parameters, including prescribed stress in the first loading cycle (σA) and loading strain rate (lsr), affect the appearance of the Kaiser effect lacks thorough understanding. We systematically performed UCLU tests on 75 sandstone specimens under 25 combinations of σA and lsr. σA spans from 0.5σc (σc is the uniaxial compressive strength) to 0.9σc, and lsr ranges from 10−5 s−1 to 10−3 s−1, respectively. The acoustic emission characteristics of all the rock specimens are continuously monitored over the entire tests. We find that the Kaiser effect is unanimously observed in the stable crack growth stage, corresponding to the stress levels of 0.5σc to 0.7σc because under a lower stress, the Kaiser effect is easily covered by the acoustic emissions generated by microcrack friction. The loading strain rate also heavily affects the occurrence of the Kaiser effect. When lsr does not exceed 10−4 s−1, the Felicity ratio (FR) rises quickly as lsr ascends, whereas FR increases less pronouncedly once lsr exceeds 10−4 s−1. Therefore, a relatively high loading strain rate, i.e., lsr higher than 10−4 s−1, is suggested to facilitate the appearance of the Kaiser effect.

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Present-day stress state and fault stability analysis in the capital area of China constrained by in situ stress measurements and focal mechanism solutions

Cited by 20 publications

References 50 publications

Current Tectonic Stress State in an Iron Mine District, North China, Based on Overcoring, Hydraulic Fracturing, and Acoustic Emission Stress Measurements

Current Tectonic Stress State in an Iron Mine District, North China, Based on Overcoring, Hydraulic Fracturing, and Acoustic Emission Stress Measurements

Quantitative Study on the Stress Distribution Characteristics of Coal Rock with Faults

Assessment of Appropriate Experimental Parameters for Studying the Kaiser Effect of Rock

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