Induced seismicity of Indian coal mines

Chouhan, R. K. S.

doi:10.1016/0031-9201(86)90034-8

Cited by 11 publications

(3 citation statements)

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“…In another article [24] by Konicek et al, the effectiveness of torpedo blasts in preventing rockbursts was estimated using the seismic effect method. Stress relief blasting has also been used in Indian coal mines [25], in South African ore mines [26] and in a Canadian copper mine [27,28]. Andrieux et al [27] assessed the effectiveness of blasting using seismic tomography in one of the mines in Canada.…”

Section: Introductionmentioning

confidence: 99%

Geomechanical and Technical Aspects of Torpedo Blasting under Seismic and Rockburst Hazard Conditions in Legnica–Glogow Copper District Mines

Burtan,

Cieślik,

Chlebowski

et al. 2024

Energies

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The dominant hazard in the Polish copper ore mining industry (LGCD mines—Legnica–Glogow Copper District) is the occurrence of mining tremors and rockbursts. One of the effective active methods of preventing this threat is torpedo blasting, which results in disturbing the structure of roof rocks. A change in the integrity of a roof, especially in the tremor-generating layer or in the contact between stiff rock layers, reduces the possibility of an elastic energy concentration and may also be a kind of stress concentrator, provoking the destruction of rocks. This article presents original solutions for determining the areas of rock mass within a mining area where it is advisable to conduct torpedo blasting, and the experience of blasting in the Rudna copper mine in the LGCD is described. The first part of this article presents the results and experiences of using torpedo blasting prevention in the LGCD mine conditions in the Rudna mine. Assuming that due to the stress of the rocks, torpedo blasting brings the greatest benefits in the areas of elastic energy concentration, the second part of this article presents the results of numerical modeling, on the basis of which the zones of elastic energy concentration in the form of total, shear and volume deformation were determined in the vicinity of mining activities for typical geological and mining conditions in the LGCD. The importance of methods for the verification of the proposed solutions based on the analysis of seismic activity and geophysical mechanisms of events’ foci and seismo-acoustic emissions was also emphasized. The numerical simulations performed and conclusions from in situ observations allowed the formulation of general principles for the selection of torpedo blasting parameters.

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Section: Introductionmentioning

confidence: 99%

Geomechanical and Technical Aspects of Torpedo Blasting under Seismic and Rockburst Hazard Conditions in Legnica–Glogow Copper District Mines

Burtan,

Cieślik,

Chlebowski

et al. 2024

Energies

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“…These changes can trigger dynamic phenomena in the form of seismic events of varying degrees of energy. In the case of underground hard coal mining, some surveys were conducted in many coal-mining areas and reported in the last several decades, e.g., [1][2][3][4][5][6]. The research on the registered seismic events was conducted mainly to increase the safety of underground work and minimize the adverse impact on the surface [7].…”

Section: Introductionmentioning

confidence: 99%

Detailed Recognition of Seismogenic Structures Activated during Underground Coal Mining: A Case Study from Bobrek Mine, Poland

2020

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In rock mass disturbed by mining activity, distortions in the stress balance may lead to seismic energy being emitted in reactivated seismogenic structures. One way of increasing the imaging resolution of these seismically active structures is through relocation, which itself can be achieved using the cloud collapsing method. This method partially eliminates perturbations in the location of seismic energy sources concerning the actual positions of these sources. It enables events to be grouped into spatially ordered structures that may correspond to actual tectonic structures, such as fractures, fissures, or faults. We present the results of applying the collapsing method in mining seismology using a cloud of located events recorded during mining activity at one of the coalfaces in the Bobrek hard coal mine. The relocation procedure was applied to all the foci of events recorded during mining activity on face 3/503 between April 2009 and July 2010. In the relocated point cloud, two types of the linear structure responsible for generating events are automatically distinguished using the HDBSCAN algorithm: structures directly related to mining activity and structures associated with local tectonics. The location of the separated structures of the first type corresponds to the range of coalface 3/503 and the shafts delimiting earlier mined seams 507 and 509 located below. The isolated structures of the second type, with almost vertical orientation, are associated with existing zones of discontinuity that become seismically active as a result of mining activity. The identified structures lie near the biggest events recorded, which is evidence that these structures may correspond to real discontinuity zones.

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“…In India, the application of microseismic monitoring has been restricted mainly within the underground mines for understanding rock bursts and coal bumps. (Chouhan, 1986;Jha et al 1994;Srinivasan et al 1997;Sivakumar et al 2008). The application of microseismic monitoring in an opencast mine in India was initiated by Ajay Kumar et al (2009).…”

Section: Introductionmentioning

confidence: 99%

Slope Stability Monitoring by Quantification and Behavior of Microseismic Events in an Opencast Coal Mine

Vinoth

Kumar

2015

Journal of the Geological Society of India

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The application of a routine high resolution microseismic monitoring system installed in an opencast coal mine for monitoring highwall slope failures is discussed. A PC based microseismic network consisting of geophones, data loggers, GPS synchronization and Ethernet antennas for wireless communication is employed to study the impact of induced seismicity on the slope failures in real time. The study aimed to understand the rock mass response to mining induced seismicity from the behavior of seismic events within rock mass. The level of induced seismicity due to underground excavation is determined from the seismic source parameters such as locations, magnitude, and seismic energy. The status of the slope is assessed by the quantification of the microseismic events. The understanding of spatial and temporal distribution of the seismic events within the mining district correlated well with the existing geological structures and the excavation sequence. The application of microseismic system in the opencast mine has not only yielded confident results, but also marked as an effective tool for continuous monitoring of seismicity on the deep opencast slopes for mitigating the seismic risks and hazard management.

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Induced seismicity of Indian coal mines

Cited by 11 publications

References 0 publications

Geomechanical and Technical Aspects of Torpedo Blasting under Seismic and Rockburst Hazard Conditions in Legnica–Glogow Copper District Mines

Geomechanical and Technical Aspects of Torpedo Blasting under Seismic and Rockburst Hazard Conditions in Legnica–Glogow Copper District Mines

Detailed Recognition of Seismogenic Structures Activated during Underground Coal Mining: A Case Study from Bobrek Mine, Poland

Slope Stability Monitoring by Quantification and Behavior of Microseismic Events in an Opencast Coal Mine

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