Comprehensive study on the deformation and failure characteristics of a mining-impacted deep double-longwall working face floor

Zhu, Shuyun; Lu, Lipeng; Wu, Yun; Zhang, Tingting

doi:10.1088/1742-2140/aa64aa

Cited by 10 publications

(8 citation statements)

References 17 publications

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“…The area in which there are high strains in the advancement of the working face can be therefore defined as having the highest stresses. This area is the same as the area of increased stress found in Zhu et al (2017). It is also the location with the highest loading which is the primary cause of the plastic deformation of the mine floor.…”

Section: Mining-induced Characteristics Of Stress On Mine Floormentioning

confidence: 63%

“…The strain gauges used in this study provide two types of strain measurements: axial and radial strain measurements. Zhu et al (2017) proposed that after the advancement of the working face, the stress in front of the working face will increase due to stress concentrations, which will damage the mine floor. After more advancement of the working face, the layer of rock in the mine floor falls into the goaf due to unloading, which could lead to the deformation of the floor and even damage to the floor.…”

Section: Mining-induced Characteristics Of Stress On Mine Floormentioning

confidence: 99%

“…At present, the deformation and failure characteristics of the rock mass of the mine floor of seams have been studied by many both Chinese and international academics and practitioners, so a large volume of research results have been obtained (Li et al 2013;Feng et al 2016;Li et al 2016;Zhu and Zhang 2018). As a result, many research methods for determining the characteristics of failure of the mine floor have been proposed, which can be primarily grouped into field measurements (Zhang et al 2006;Kang et al 2010;Xu et al 2012;Huang et al 2014Huang et al , 2018Yin et al 2016;Zhao et al 2016), laboratory experiments Liu et al 2015;Sun et al 2017;Zhu et al 2017; and analytical calculations (Wang et al 2009;Yu et al 2009;Song et al 2016;Yin et al 2016;Cheng et al 2018;Su and Wei 2018;.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Experimental investigation on mining-induced strain and failure characteristics of rock masses of mine floor

Zeng

Huang

et al. 2020

Geomatics, Natural Hazards and Risk

Self Cite

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Section: Mining-induced Characteristics Of Stress On Mine Floormentioning

confidence: 63%

Section: Mining-induced Characteristics Of Stress On Mine Floormentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Experimental investigation on mining-induced strain and failure characteristics of rock masses of mine floor

Zeng

Huang

et al. 2020

Geomatics, Natural Hazards and Risk

Self Cite

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“…ere are many research results about deep mining, which can provide a reference for this study. Some scholars have studied the deformation mechanism of deep soft rock roadway using the angles of theory [12][13][14], numerical simulation [15][16][17], and field measurements [18,19]. A previous study has also studied the measures to control the deformation of roadways [20,21].…”

Section: Introductionmentioning

confidence: 99%

Failure Mechanism of Gob‐Side Roadway under Overlying Coal Pillar Multiseam Mining

Wang

Song

et al. 2021

Shock and Vibration

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Roadway deformation and rock burst are the two key challenges faced by the safe operation of coal mines. Aiming at the issue of large deformation of the gob-side roadway under coal pillars in multiseam mining, this study has considered the case of the 8308 panel of Xinzhouyao coal mine in China. Based upon a combination of theoretical analysis, numerical simulations, and engineering practices, the mechanical model of “stress and deformation quantitative calculation of gob-side roadway under overlying coal pillars” was established in this study. The analytical solutions of the vertical stress distribution and the plastic zone of the gob-side roadway under overlying coal pillars were obtained. Finally, the accuracy of the mechanical model was verified using numerical simulations. The results showed that the coal pillar, upright above the gob-side roadway, and the cantilever roof around the gob-side roadway were the main factors leading to stress concentration and deformation around the gob-side roadway. For the particular cases considered in this study, the peak stress of the gob-side roadway could reach 1.8 times of the self-weight stress of overlying strata. The rates of the contribution of the gob-side roadway’s overlying pillar and the cantilever roof around the gob-side roadway to peak stress were 78.3% and 16%, respectively. The obtained results have an essential reference significance for stress calculations and rock burst prevention design of gob-side roadway under overlying coal pillars in multiseam mining.

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“…In terms of theoretical calculation of goaf floor failure depth, Zhu et al applied semi-infinite body theory of elastic mechanics, considering the effect supporting pressure exerts on the floor, and then established a mechanical model of coal floor [1][2][3][4]. Lu et al treated limit equilibrium failure form of the floor under the supporting pressure as circular slip, applying the slip-line field's applied theory to calculate the maximum floor failure depth [5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Research on failure characteristics of goaf floor in the inclined coal seam based on the fracture mechanics

Zheng-yi

Zhang

et al. 2020

SN Appl. Sci.

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Floor failure is the leading cause of mine water inrush after coal mining above the confined aquifer. Therefore, the prediction of floor failure depth is an important content of mine water prevention. The mining-induced failure depth and goaf floor characteristics are researched to grasp the goaf failure condition after the inclined coal seam mining with the theoretical analysis method. The inclined coal goaf floor's stress solving mechanics mode is set up based on the fracture mechanics theories. According to the Mohr-Coulomb criterion, the floor failure depth solving the equation is derived. With the theoretical analysis of the floor failure characteristics during the inclined coal seam mining, (1) the maximum failure depth of floor is nonlinear to the coal seam dip and the lateral pressure coefficient; the working face length, mining depth and floor cohesion positively correlate with the failure range; the floor cohesion is reversely proportional to the failure range. (2) There appears asymmetry in the layout of stress and plastic zones in the inclined coal goaf floor. Failure range and depth in-floor plastic zone increasingly enlarge when the coal face advances.

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Comprehensive study on the deformation and failure characteristics of a mining-impacted deep double-longwall working face floor

Cited by 10 publications

References 17 publications

Experimental investigation on mining-induced strain and failure characteristics of rock masses of mine floor

Experimental investigation on mining-induced strain and failure characteristics of rock masses of mine floor

Failure Mechanism of Gob‐Side Roadway under Overlying Coal Pillar Multiseam Mining

Research on failure characteristics of goaf floor in the inclined coal seam based on the fracture mechanics

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