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Application of Correlation Integral and Fractal Dimension in Longwall Mine SafetyNormal access

Authors: D. Mondal, P.N.S. Roy and P.K. Behera
Event name: 79th EAGE Conference and Exhibition 2017
Session: Near Surface - Seismic, Mining
Publication date: 12 June 2017
DOI: 10.3997/2214-4609.201701417
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 7.01Mb )
Price: € 20

Summary:
Longwall mining is considered as the most sophisticated form of coal mining and has very recovery. It is seen that in this form of mining the stress level in the roof strata plays a very important role in smooth running of the mines. The presence of stable roof strata over the coal seams sometimes creates problem in caving and the hanging load behind the face induces enormous amount on the powered supports. After reaching a critical limit the stress in the hanging strata is released in form of rock burst resulting in the total failure of the powered supports. Also the giant wind blowouts created results in fatalities in the mine. This paper attempts to describe the theory of using Fractal Dimension from Correlation Integral for locating the clustering of microseismic events in the roof strata that can be used for stress monitoring. It is seen that Fractal Dimension has been very helpful in locating stresses zones.


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