Volumetric changes in the focal areas of seismic events corresponding to destress blasting

Koníček, Petr; Schreiber, J.; Nazarova, Larisa

doi:10.1016/j.ijmst.2019.06.004

Cited by 15 publications

(5 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Lazy Mine extraction in this area uses the longwall mining method with controlled caving. The research studies (Konicek et al, 2013;Konicek et al, 2019;Jiránková et al, 2012) proved that the rock mass has anisotropic properties and mining is accompanied by significant seismological phenomena.…”

Section: Study Areamentioning

confidence: 99%

“…Commonly used values for the geomechanical properties of the rock mass in the OKC District (Konicek et al, 2019; were applied in the model (see Table 2). The average values of the initial mechanical parameters were interpolated from the data obtained by almost 3,000 laboratory tests Illustration of defined deformation zones for Carboniferous and Miocene overburden rocks in OKC mine ASSESSMENT OF MODELS TO PREDIT SURFACE SUBSIDENCE IN THE CZECH PART OF … .…”

Section: Overburden Propertiesmentioning

confidence: 99%

See 1 more Smart Citation

Assessment of models to predict surface subsidence in the Czech part of the Upper Silesian Coal Basin - Case study

Jiránková¹

2020

Acta Geodynamica Et Geomaterialia

View full text Add to dashboard Cite

This case study presents the verification of two surface subsidence prediction models for longwall mining at depths greater than 400 m. The surface subsidence points were surveyed and compared for both models. The first model uses empirical calculations to predict the surface subsidence. This method is reliable for predicting surface subsidence at shallower depths. At present, however, coal mining has progressed to great depths. The second model is the 2-dimensional finite element method to predict surface subsidence. In contrast to the first method, this method is based on the regional parameters and uses the rock mass properties to evaluate surface subsidence for multiseams at any depth. Results show that the finite element method gives a better approximation of the measured surface subsidence than the Knothe method. The maximum surface subsidence, which was determined by the FEM method, was used to adjust the extraction coefficient in the Knothe's method. The predicted value differs from the measured value by 8 %. The slope of the predicted subsidence trough was within the range of 2-8 % from the surveyed subsidence. This case study proposes a procedure for using both models to successfully predict the surface subsidence.

show abstract

Section: Study Areamentioning

confidence: 99%

Section: Overburden Propertiesmentioning

confidence: 99%

Assessment of models to predict surface subsidence in the Czech part of the Upper Silesian Coal Basin - Case study

Jiránková¹

2020

Acta Geodynamica Et Geomaterialia

View full text Add to dashboard Cite

show abstract

“…With the increase of mining depth, mines are facing complex production environments such as high ground stress, high geothermal temperature, high rock saturation water pressure, and strong dynamic load disturbance (He et al, 2005(He et al, , 2018Zhu et al, 2018). Further research is urgently needed on the mechanisms of deep rockburst, coal and gas outburst, mine fires, and technologies of monitoring and preventing these hazards (Kaiser and Cai, 2013;Lin et al, 2015;Konicek et al, 2019;Vennes et al, 2020;Lu et al, 2022). The latest research mainly focuses on the fundamental theory of deep mine disasters and monitoring and control technologies, especially on issues related to complex disaster mechanisms and intelligent monitoring technologies (Pu et al, 2018(Pu et al, , 2019Małkowski and Niedbalski, 2020;He et al, 2023).…”

Section: Introductionmentioning

confidence: 99%

Advances in mining safety theory, technology, and equipment

He,

Mitri

et al. 2023

Adv. Geo-Energy Res.

View full text Add to dashboard Cite

Mineral resources are increasing important for sustainable development in modern society. As the progressive depletion of shallow mineral deposits, deep or ultra-deep mineral extraction is an inevitable choice for mineral and energy security in various countries in the future. The trend of occurrences of geohazards including rock burst, cascading ground failure, uncontrollable underground space squeezing, coal and gas outburst, and fires, will be expected to excessively increasing as deepening the mine depth. Mining safety science and engineering challenges are drawing more and more attention over last decade and beyond. In August 2023, the 6 th International Symposium on Mine Safety Science and Engineering was held in Harbin to promote innovative development of mining safety, and foster international collaborations among scholars in the field of mining safety. It served as a platform for the exchange of the most recent advancements in mining safety scientific theories, technologies, and equipment by bringing together global talent. Over 400 attendees representing 9 countries, including Australia, Russia, United State, Kazakhstan, and Canada, engaged in academic discussions and knowledge sharing on new theories, technologies, equipment, and methods in mining safety science and engineering. The latest research results are of great significance in enhancing the practices of preventing mine disaster and ensuring the safety of mining operations.

show abstract

“…In Situ stress redistribution influenced by mining excavation can be analyzed by numerical modeling, InSar monitoring, and seismic monitoring in association with tomography to show velocity anomalies [15,16]. Studies suggested that reliable microseismic monitoring systems are playing a key role for mining safety [17][18][19]. The ability of forecasting mainshocks in mine management is crucial for establishing and effectively employing a protocol for seismic hazards mitigation [20].…”

Section: Introductionmentioning

confidence: 99%

Passive Tomographic Study on Velocity Changes in Underground Mines Using Tabular Mesh Grids

Westman

Guo

et al. 2022

Lithosphere

View full text Add to dashboard Cite

Double difference tomographic inversion on measurements of travelling time and location are performed to analyze the velocity structure within rock mass in underground mining. Residuals of each iteration are estimated to evaluate the conversion of computation. Average wave propagation velocities in tabular areas are assessed to compare the velocity change affected by mainshocks. It is summarized that velocity increases before mainshocks and then reduces with temporal evolution after them. Possible explanations include static stress buildup that enhances the wave propagation before mainshocks and static stress reduction that weakens the waveform propagation. Additionally, wave propagation is attenuated by the dynamic-shaking induced fractures and ruptures within rock masses. Velocity change is shown to be of importance in assessing the stress redistribution and stability of rock masses. It is found that P-wave velocity increased by 1% ~5% before the occurrence of mainshocks. After the mainshocks, the velocity turned into decreasing and eventually dropped to a level that was even lower than the average level before the mainshocks. It can be inferred that stress increased and formed a stress concentration region before the mainshocks. The occurrence of mainshocks caused damage and stress relaxation in the rock mass, leading to a significant velocity decrease.

show abstract

Volumetric changes in the focal areas of seismic events corresponding to destress blasting

Cited by 15 publications

References 16 publications

Assessment of models to predict surface subsidence in the Czech part of the Upper Silesian Coal Basin - Case study

Assessment of models to predict surface subsidence in the Czech part of the Upper Silesian Coal Basin - Case study

Advances in mining safety theory, technology, and equipment

Passive Tomographic Study on Velocity Changes in Underground Mines Using Tabular Mesh Grids

Contact Info

Product

Resources

About