Rock burst prediction based on in-situ stress and energy accumulation theory

Miao, Sheng; Cai, Meifeng; Guo, Qifeng; Huang, Zhengjun

doi:10.1016/j.ijrmms.2016.01.001

Cited by 114 publications

(27 citation statements)

References 17 publications

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“…Then formula (12) is substituted by (10) and 11; the formulas for calculating the principal stresses σ 1 and σ 2 are obtained.…”

Section: Geofluidsmentioning

confidence: 99%

“…It is a necessary prerequisite to determine the mechanical properties of engineering rock mass, analyze the stability of surrounding rock, and realize the scientific design of rock excavation and decisionmaking [7]. With the continuous expansion of the scale and depth of mine excavation, in situ stress has become more prominent and the occurrence of many disaster phenomena is closely related to the in situ stress [8][9][10]. Therefore, it is necessary to determine the distribution of the in situ stress before the mining project.…”

Section: Introductionmentioning

confidence: 99%

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A Simple and Accurate Interpretation Method of In Situ Stress Measurement Based on Rock Kaiser Effect and Its Application

Zhao

Yan

et al. 2018

Geofluids

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Many deep underground excavation practices show that the size and distribution of in situ stress are the main factors resulting in the deformation and instability of the surrounding rock structure. The in situ stress measured by the Kaiser effect of rock is used by engineers because of its economy and convenience. However, due to the lack of quantitative judgment basis in determining the Kaiser point position, there is a large artificial error in the practical application. In response to the problem, this study systematically investigates the characteristics of rock acoustic emission curve on the basis of the fractal theory and establishes an accurate and simple interpretation method for determining the Kaiser point position. The indoor rock acoustic emission test was carried out by drilling a rock sample at a mine site. By using the conventional tangent method, the cumulative ringing count rate-time-stress curve of rock acoustic emission is analyzed to preliminarily determine the time range of Kaiser point appearance. Considering that the fractal dimension of the rock Kaiser point is lower than the adjacent point, the minimum point of the fractal dimension of this time range can be determined from the fractal dimension-time-stress curve. Such determined point is the Kaiser point. The size of the in situ stress is calculated using an analytical method. Based on the value of the in situ stress, the distribution of the in situ stress in the mining area is further analyzed using the geological structure of the mine. The maximum principal stress is 19.38 MPa, with a direction of N (30°-40°) E, and the minimum principal stress is 8.02 MPa with a direction of N (50°-60°) W. The maximum and minimum principal stresses are approximately in the horizontal plane. The intermediate principal stress is 11.73 MPa in vertically downward. These results are basically consistent with the distribution statistical law of the measured in situ stress fields in the world. The results presented in the study could provide a reference for the later mining, stability evaluation, and support of the surrounding rock.

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“…Then formula (12) is substituted by (10) and 11; the formulas for calculating the principal stresses σ 1 and σ 2 are obtained.…”

Section: Geofluidsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Simple and Accurate Interpretation Method of In Situ Stress Measurement Based on Rock Kaiser Effect and Its Application

Zhao

Yan

et al. 2018

Geofluids

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“…The strain energy parameters were defined in FLAC3D to capture the mining‐induced energy distribution in the coal seam. The elastic strain energy is given by Miao et al as follows:

W_{e} = \frac{1}{2} (σ_{1} ε_{1} + σ_{2} ε_{2} + σ_{3} ε_{3}) = \frac{1}{2 E} [σ_{1}^{2} + σ_{2}^{2} + σ_{3}^{2} - 2 υ (σ_{1} σ_{2} + σ_{1} σ_{3} + σ_{1} σ_{3})]

where W e is the elastic strain energy of the surrounding rock. In the present study, Equation () was implemented by means of FISH.…”

Section: Model Results and Analysismentioning

confidence: 99%

“…The strain energy parameters were defined in FLAC3D to capture the mining-induced energy distribution in the coal seam. The elastic strain energy is given by Miao et al 39 as follows:…”

Section: Model Results and Analysismentioning

confidence: 99%

A numerical study of the mining‐induced energy redistribution in a coal seam adjacent to an extracted coal panel during longwall face mining: A case study

Wang

Qiu

Ning

et al. 2019

Energy Science & Engineering

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Mining of the coal seam adjacent to the extracted coal panel is widely practiced in China to improve coal resource recovery rates, but the energy change associated with longwall mining may present a new risk to ground stability and gateroad failure. To understand the energy change effectively, a meticulously validated numerical model, built using FLAC3D software, incorporating a double‐yield model for the gob materials and a strain‐softening model for the coal/rock masses, was developed to investigate the energy redistribution in coal seams and barrier pillars during the process of mining the coal seam adjacent to the extracted coal panel. The model results showed that the closer the region was to the LW 5301 gob, the higher the location and magnitude of the peak strain energy density. Consequently, the risk of rockburst in coal seams was greater than that in barrier pillars. Along the coal seam strike, with increasing advancing distance from the setup room, the magnitude of the peak strain energy density gradually increased to 1.88‐2.78 times the premining energy level. In addition, along the coal seam dip, the maximum distance from the peak strain energy density to the edge of the coal seam was approximately 16‐28 m, which is greater than that in the barrier pillar. The proposed numerical simulation procedure and calibrated method could be a viable alternative approach to evaluate longwall mining‐induced energy changes.

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“…With the increase of the coal mining depth, the occurrence frequency of rock burst also increases in China [4][5][6][7][8][9][10]. Among the different kinds of rock burst, sloughing rock burst is the most common one, which usually results from the local instability of a mine roadway [11][12][13]. The sloughing rock burst not only brings harms to the support systems and human lives but also can cause other mine disasters, such as gas explosion [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Dynamics Mechanism of Rock Burst Induced by the Instability of the Layer-Crack Plate Structure in the Coal Wall in Deep Coal Mining

Chen

Mao

et al. 2017

Shock and Vibration

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The instability of layer-crack plate structure in coal wall is one of the causes of rock burst. In the present paper, we investigate the formation and instability processes of layer-crack plate structure in coal wall by experiments and theoretical analysis. The results reveal that layer-crack plate structure formed near the free surface of the coal wall during the loading. During the formation of the layer-crack plate structure, the lateral displacement curve of the coal wall experiences a jagged variation, which suggests the nonlinear instability failure of the coal wall with a sudden release of the elastic energy. Then, a dynamic model for the stability analysis of the layer-crack plate structure was proposed, which takes consideration of the dynamic disturbance factor. Based on the dynamic model, the criterion for dynamic instability of the layer-crack plate structure was determined and demonstrated by an example. According to the analytical results, some control methods of dynamic stability of the layer-crack plate structure was put forward.

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Rock burst prediction based on in-situ stress and energy accumulation theory

Cited by 114 publications

References 17 publications

A Simple and Accurate Interpretation Method of In Situ Stress Measurement Based on Rock Kaiser Effect and Its Application

A Simple and Accurate Interpretation Method of In Situ Stress Measurement Based on Rock Kaiser Effect and Its Application

A numerical study of the mining‐induced energy redistribution in a coal seam adjacent to an extracted coal panel during longwall face mining: A case study

Nonlinear Dynamics Mechanism of Rock Burst Induced by the Instability of the Layer-Crack Plate Structure in the Coal Wall in Deep Coal Mining

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