Earth tides and seismic activity in deep coal mining

Siwek, Sławomir

doi:10.1016/j.ijrmms.2021.104972

Cited by 18 publications

(3 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Annually, more than 500 tremors occur in the USCB. The typical energy associated with these mining tremors falls within the range of 10 5 to 10 7 J, although events with energy levels up to 10 10 J have been documented [5,6,34,35]. In the USCB region, the recorded maximum amplitudes of these tremors can reach values of up to 1.7 m/s 2 , and their predominant frequencies typically range from 3 to 8 Hz [36,37].…”

Section: Characteristics Of Mining-induced Tremors and The Shock Used...mentioning

confidence: 99%

On the Susceptibility of Reinforced Concrete Beam and Rigid-Frame Bridges Subjected to Spatially Varying Mining-Induced Seismic Excitation

Boroń,

Drygała,

Dulińska

et al. 2024

Materials

View full text Add to dashboard Cite

This paper aims to identify the optimal reinforced concrete bridge construction for regions at risk of mining-induced seismic shocks. This study compares the performances of two common bridge types made of the same structural tissue, i.e., a reinforced concrete beam bridge and rigid-frame bridge under real mining-induced tremors using uniform and spatially varying ground motion models. This study investigates the dynamic responses of the bridges depending on wave velocity and assesses their susceptibility to mining-triggered tremors based on the contribution of quasi-static and dynamic effects in the global dynamic responses of the bridges. This study revealed significant changes in dynamic response under spatially varying ground excitation for both bridge types. It was observed that rigid-frame bridges show higher susceptibility to quasi-static effects due to their stiffness, whereas beam bridges are more susceptible to dynamic stresses. This study recommends that in regions with mining tremors, the choice between bridge types should consider the possibility of limiting individual components of stress. A solution may involve the reduction in quasi-static components through structural reinforcement or decreasing dynamic components by using vibration absorbers. It was found that beam bridges are more cost-effective and practical in mining-affected areas, especially when founded on weak grounds.

show abstract

Section: Characteristics Of Mining-induced Tremors and The Shock Used...mentioning

confidence: 99%

On the Susceptibility of Reinforced Concrete Beam and Rigid-Frame Bridges Subjected to Spatially Varying Mining-Induced Seismic Excitation

Boroń,

Drygała,

Dulińska

et al. 2024

Materials

View full text Add to dashboard Cite

show abstract

“…In the process of coal mining, these thick and hard rock strata are not easy to break. However, as the mining space increases, the overhanging roof area of the hard-thick strata keeps increasing and begins to accumulate a large amount of elastic energy, and when the breaking limit is reached, the hardthick strata will break and release the accumulated energy [1][2][3] , thus inducing many strong dynamic disaster phenomena such as strong mine earthquake, mine water burst, and roof falling [4][5][6][7][8] . Take Ordos area in China as an example, there are thick and hard rock strata mainly medium and fine grained sandstone in the Cretaceous strata, which have high strength, large thickness and distance from coal seams.…”

Section: Introductionmentioning

confidence: 99%

Study on the Mechanism and Response Law of Fracture Movement on the Super-High Position Hard-thick Strata

Zhang

Zhou

Wang³

et al. 2023

Preprint

View full text Add to dashboard Cite

Based on the breaking of hard-thick rock strata in Ordos area triggering large-energy and strong earthquake, a thick plate structural mechanical model of breaking hard-thick rock strata is established. And the evolution process of hard-thick rock strata are analyzed based on Vlasov theory. The large energy mining earthquake and surface subsidence data are used to verify the analysis. The following conclusions were drawn: (1) The hard-thick strata in the cretaceous system will not be broken during the advancing and mining process of the 221 upper 03 working face of Shilawusu coal mine. (2) Before the advancing of the 221 upper 03 working face reached "double square", no breakage occurred in the lower part of the hard-thick strata, because no separated space was formed. (3) When the 221 upper 03 working face was advanced to about 856m, vertical "O-X" breakage occurred in the hard-thick strata. As the working face continues to advance 138m, periodic breakage will continue to occur in the hard-thick strata. (4) No large-energy mine earthquake event has occurred during mining at 221 upper 03 working face, and the amount of surface subsidence is approximately 200mm. (5) In the mining at 221 upper 03 working face, two large energy mining earthquake occurred in 837m, 1153m away from the open-off cut, respectively, and the maximum amount of surface subsidence increased to 1397mm, which basically accords with the results of the first and periodic breaks calculated by theory. The research results of this paper are of guiding significance for the study of the breaking law of hard-thick strata under similar engineering geological conditions and disaster pre-control.

show abstract

“…Especially in the underground excavation, the rock mass is subjected to the combination of high static load and frequent or cyclic external disturbances, among which the external disturbances include blasting, earthquake, mechanical vibration, etc. [1][2][3][4]. Under these conditions, the stress redistribution within a certain range caused by rock excavation and the external disturbance is the main cause of the frequent occurrence of disasters, such as rockbursts [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Fracture and Damage Characteristics of Granite under Uniaxial Disturbance Loads

Fei

Wang

et al. 2022

Buildings

View full text Add to dashboard Cite

To investigate the mechanical properties and damage characteristics of granite under frequent disturbance loads in the process of underground engineering construction, laboratory uniaxial compression tests were conducted on granite under combined dynamic and static loading conditions. The following conclusions were reached: (1) under a dynamic disturbance, the failure stress of granite grows gradually as the initial stress and disturbance load rise due to the coupling of damage and strain-rate effect; (2) the characteristic stresses of granite specimens grow with the increasing amplitude of disturbance Δσ under the disturbing loads; with the same Δσ, the characteristic stresses show an increase trend with the increasing initial stress σm; (3) the particle size distribution of rock fragments broken under the disturbance load follows the fractal law, and the fractal dimension F gradually enlarges with the growth of Δσ, indicative of an increased degree of fragmentation; and (4) the damage variable grows rapidly at first, then steadily, and, finally, shows a rapid growth trend again under the disturbance loads. The Δσ significantly influences the number of cycles and rate of change of the damage variable during the steady increase. This research has certain theoretical significance and engineering guidance value for dynamic disaster recognition and control.

show abstract

Earth tides and seismic activity in deep coal mining

Cited by 18 publications

References 21 publications

On the Susceptibility of Reinforced Concrete Beam and Rigid-Frame Bridges Subjected to Spatially Varying Mining-Induced Seismic Excitation

On the Susceptibility of Reinforced Concrete Beam and Rigid-Frame Bridges Subjected to Spatially Varying Mining-Induced Seismic Excitation

Study on the Mechanism and Response Law of Fracture Movement on the Super-High Position Hard-thick Strata

Fracture and Damage Characteristics of Granite under Uniaxial Disturbance Loads

Contact Info

Product

Resources

About