LiFei1, 2, ChengJiulong1, et al. Fine detection of overburden strata based on time lapse high density resistivity method[J]. Journal of Mining Science and Technology, 2019, 4(1): 1-7.
Citation: LiFei1, 2, ChengJiulong1, et al. Fine detection of overburden strata based on time lapse high density resistivity method[J]. Journal of Mining Science and Technology, 2019, 4(1): 1-7.

Fine detection of overburden strata based on time lapse high density resistivity method

  • Finedetectionforthedeformationfailureofoverburdenstratacausedbyundergroundmining mayprovidereliableguidanceforsafety,highefficientandgreencoalmining*Firstly,theprincipleofo⁃ verburdendetectionbasedontimelapsehighdensityresistivitymethodwasinvestigated*Then3Dgeo⁃ logic⁃geophysicalmodelsofoverburdenstratabeforeandafterminingwereconstructed,andthecorre⁃ sponding numerical simulation was carried out by using these models*It is demonstrated that deformationfailureofoverburdenstrataishourglass⁃likeintheresistivitychangerateprofileandorifice istheseparatrixbetweenthefracturedzoneandthebendingzone*Furthermore,fieldtestswerecarried out,resultsshowthatthesurfacesubsidencecausedpositiveanomalyandprecipitationcausednegative anomalyintheresistivitychangerateprofile*Basedonthehourglass⁃likeanomalymorphologyandkeystratumlayer,theheightoffracturedzonewasdeterminedtobe98m*Finally,theresultsfromtime lapsedetectionwereverifiedbydrillingresults*
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