Microseismicity observed in an underground mine: Source mechanisms and possible causes

Barthwal, Himanshu; Baan, Mirko van der

doi:10.1016/j.gete.2019.100167

Cited by 9 publications

(2 citation statements)

References 35 publications

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“…During this process, rock fracture and mining vibration are inevitable, and the spontaneous or stimulated acoustic emission phenomenon is called microseism [13,14]. Microseism is primarily mediated by the overburden caving in the goaf, large roof falling, surface subsidence, coal and gas outbursts, underground mining, and other mining activities [15]. The present research on mine earthquakes focuses on the inducing mechanism, the energy calculation, the microseism monitoring and positioning, and hazard prevention and control [16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Response of Heavy Metals to Microseism in Coal Mining Subsidence Water of Huainan, China

Wang

Zhang

2023

Water

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Coal mining causes surface subsidence, and the accumulated water body is constantly affected by the mining microseism in this process. Understanding the relationship between the subsided water quality and microseism plays a special role in assessing the environmental impact of mining activities. Based on sampling and monitoring, analyzing, and evaluating the Pansan subsided water area of Huainan, the influence of microseism activity on heavy metal elements in subsided water was verified. We found that the microseism effects decreased the contents of Zn, Pb, and Cu in the subsided water by 43.76%, 35.88%, and 28.83%, respectively, and Cd was not detected. The mechanism of heavy metal evolution in the water–sediment system under microseism factors was further explored by simulating experiments with similar materials. The results showed that the mining microseism increases the heavy metal adsorption capacity of suspended solids, and the dissolved heavy metals in water were transformed into suspended heavy metals. The heavy metals of subsided water eventually accumulate in the sediment, and the purpose of controlling heavy metal pollution can be achieved through regular cleaning of the bottom sediment.

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Section: Introductionmentioning

confidence: 99%

Response of Heavy Metals to Microseism in Coal Mining Subsidence Water of Huainan, China

Wang

Zhang

2023

Water

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“…Microseismic technology has been ap-plied in the field of coal mining to monitor and analyze the distribution and evolution of support pressure in working faces [37]. The application of microseismic technology in coal mining has made encouraging achievements in improving our understanding of the distribution and evolution of support pressure, and in predicting and preventing potential damage or collapse [38][39][40].…”

Section: Introductionmentioning

confidence: 99%

Mechanism and Empirical Study of Rockburst in the Adjacent Area of a Fully Mechanized Top-Coal Caving Face Based on Microseismic Technology

et al. 2023

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Monitoring and providing warnings for coal mine rockburst disasters is a worldwide problem. Several rockburst accidents have occurred in a 1301 belt transport chute near a 1300 fully mechanized caving mine face. To address this issue, an empirical study of the occurrence mechanism of rockbursts in the adjacent area of the fully mechanized top-coal caving face was carried out. This paper mainly addresses the following issues: (1) based on microseismic monitoring technology, the distribution characteristics of the host-rock-supported pressure of the 1300 working face were measured, and the evolution and distribution of the deep-well caving working face host-rock-supported pressure were analyzed. It is revealed that the occurrence mechanism of rockburst in the adjacent area is actually caused by the evolution and superposition of the lateral abutment pressure of the 1300 stope, and the stress of the original rock along the 1301 belt transport down chute; (2) a theoretical calculation model of dynamic and static abutment pressure in longwall stope is built, and an example is tested. The results show that the peak position of lateral abutment pressure of the coal body outside the 1300 goaf is around 63 m, and the peak value of abutment pressure is around 47 MPa; (3) coal body stress monitoring, bolt dynamometer detection, and other means are compared and analyzed. At the same time, with the help of CT geophysical prospecting and drilling cutting measurements, it is concluded that the 1301 belt transport down chute is in the bearing pressure influence zone (superimposed zone), which further verifies the validity of microseismic analysis results and the accuracy of the above theoretical model. Based on this, the early warning system and prevention measures for rockburst based on microseismic monitoring are proposed. The engineering practice shows that the dynamic and static bearing pressure distribution and evolution law of the working face can be dynamically obtained by using microseismic technology, which provides a basis for the accurate prediction and treatment of rockbursts.

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Microscopic Modeling of Frictional Response of Smooth Joint Under Normal Cyclic Loading

2021

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Microseismicity observed in an underground mine: Source mechanisms and possible causes

Cited by 9 publications

References 35 publications

Response of Heavy Metals to Microseism in Coal Mining Subsidence Water of Huainan, China

Response of Heavy Metals to Microseism in Coal Mining Subsidence Water of Huainan, China

Mechanism and Empirical Study of Rockburst in the Adjacent Area of a Fully Mechanized Top-Coal Caving Face Based on Microseismic Technology

Microscopic Modeling of Frictional Response of Smooth Joint Under Normal Cyclic Loading

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