Research of Rock Burst Risk Induced by Mining and Field Case in Anticlinal Control Area

Gu, Shitan; Xiao, Zhimin; Jiang, Bangyou; Huang, Ruifeng; Peng, Shan

doi:10.1155/2018/2632549

Cited by 3 publications

(2 citation statements)

References 19 publications

(23 reference statements)

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“…Dou et al 19 proposed the mechanism of superimposition of static and dynamic loads and analysed the coal bursts mechanism. Gu et al 20 studied the coal bursts risk induced by mining in an anticlinal tectonic‐controlled area. Li et al 21 established a mechanical model of fault locking and unlocking sliding and discussed the effect of fault unlocking on coal bursts induced by fault shear sliding.…”

Section: Introductionmentioning

confidence: 99%

A coal seam‐roof‐floor coupling destressing control method of fault coal bursts induced by deep coal seam mining

Xiao

Zhang

et al. 2022

Energy Science & Engineering

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Fault coal bursts is a common type of coal bursts in coal mining. With increases in mining depths and mining intensities, the occurrence frequency and disaster degree of coal bursts in fault-controlled areas are increasing in severity. Therefore, in this article, the mechanism and control method of deep mining-induced fault coal bursts are analysed on the No. 3402 longwall panel controlled by two faults in the Shandong Mine, China. Based on the microseismic monitoring data of the longwall panel, the fault activation process induced by mining can be divided into four stages. The second energy release and fault activation stages are risk stages of fault coal bursts. Using numerical simulation, the evolution laws of vertical stress, elastic strain energy in front of the longwall panel, and the ratio of shear stress to normal stress on fault plane are investigated. The phenomenon of a 'high elastic energy sectionlow elastic energy section' coal pillar between faults is revealed, and the mechanism of coal pillar coal bursts induced by high elastic energy is discussed. Third, based on the above research results, coal burts risk areas of the longwall panel in the fault-controlled area are determined. The method of 'coal seam-roof-floor coupling destressing with the reduction in mining speed' to control fault coal bursts is introduced. Field test results show that the method effectively destroys the integrity and bearing capacity of the coal seam, significantly reduces the energy storage capacity of the superposition area of mining stress and fault tectonic stress, so that the coal bursts risk of the coal seam in the fault control area is relieved, ensuring safe and efficient mining of the longwall panel. The method can provide a reference for other coal mines with similar geological conditions.

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Section: Introductionmentioning

confidence: 99%

A coal seam‐roof‐floor coupling destressing control method of fault coal bursts induced by deep coal seam mining

Xiao

Zhang

et al. 2022

Energy Science & Engineering

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“…Xu et al [20] discussed the characteristics of roadway rock burst and put forward the concept of "roadway floor risk factor." Gu et al [21] studied on rock burst risk induced by mining and field case.…”

Section: Introductionmentioning

confidence: 99%

A Control Method of Rock Burst for Dynamic Roadway Floor in Deep Mining Mine

Xiao

Liu

et al. 2019

Shock and Vibration

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Roadway floor rock burst is an important manifestation of rock bursts in deeply buried mines. With the increase of mining depth and mining intensity, rock burst disasters in the roadway floor such as floor heaves are becoming more serious. The article investigated the roadway floor severe heave caused by floor rock burst during excavation of the No. 3401 working face, which was controlled by an anticlinal structure and deep mining in Shandong Mine, China. Firstly, by analyzing geological conditions of the working face, roadway support parameters, and characteristics of coal and rock, it was revealed that high tectonic stress and high crustal stress were main causes of the floor rock burst. Secondly, based on the Theory of Mechanics and Theory of Energy, the energy conversion process in the roadway floor was discussed, and the rock burst condition caused by elastic energy in the roadway floor was analyzed. The failure characteristics of roadway-surrounding rock were also inspected, using a borehole recorder. The roof and sidewalls of roadway mainly contained fissures and cracks, whereas cracks and broken areas are distributed in the roadway floor. Finally, based on the deformation and failure characteristics of roadway-surrounding rock, a method termed “overbreaking-bolting and grouting-backfill” was proposed to control roadway floor rock burst. The method was tested in the field, and the results showed that it could effectively control the deformation of roadway floor and rock burst, guaranteeing the stability of roadway floor. This impact control method for the roadway floor can provide a reference for the prevention and control of roadway rock burst in mines with similar geological conditions.

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Behaviors and Overlying Strata Failure Law for Underground Filling of a Gently Inclined Medium‐Thick Phosphate Deposit

Geng

et al. 2021

Advances in Civil Engineering

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In this study, the No. 6 pit in the eastern mining area of the Jinning phosphate mine in China was taken as the research background. In order to reduce the cost of filling, an improved pillarless sublevel caving method is proposed. This method greatly improves the ore recovery rate by adding a recovery route. In addition, the combination of similar material simulation experiments and numerical simulations (discrete element and universal distinct element code) revealed the deformation and failure laws of the surrounding roof rock and the characteristics of the surface subsidence. The results indicate the following. (1) The similar simulation experimental results indicate that the deformation of the overlying rock layer originated from the direct roof of the goaf and gradually developed into the deep part of the rock layer. An irregular stepped caving zone formed in the goaf. The maximum surface subsidence was located above the phosphorus orebody, and it gradually decreased toward both sides. As the stope approached propulsion, the location of the maximum subsidence gradually moved toward the propulsion direction. (2) The numerical results revealed that the displacement of the overlying strata was nonlinear, and it decreased with increasing roof height. A support pressure concentration area was formed within a certain range of the stope roof. The numerical simulation results are basically consistent with the similar simulation experimental results.

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Research of Rock Burst Risk Induced by Mining and Field Case in Anticlinal Control Area

Cited by 3 publications

References 19 publications

A coal seam‐roof‐floor coupling destressing control method of fault coal bursts induced by deep coal seam mining

A coal seam‐roof‐floor coupling destressing control method of fault coal bursts induced by deep coal seam mining

A Control Method of Rock Burst for Dynamic Roadway Floor in Deep Mining Mine

Behaviors and Overlying Strata Failure Law for Underground Filling of a Gently Inclined Medium‐Thick Phosphate Deposit

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