突出煤层瓦斯抽采钻孔有效半径与孔壁变形关系研究

突出煤层瓦斯抽采钻孔有效半径与孔壁变形关系研究Title: Study on the Relationship between Effective Radius of Coalbed Methane

突出煤层瓦斯抽采钻孔有效半径与孔壁变形关系研究 Title:StudyontheRelationshipbetweenEffectiveRadiusof CoalbedMethaneExtractionBoreholesandBoreholeDeformation Abstract: Coalbedmethane(CBM)extractionplaysapivotalrolein enhancingtheefficiencyandsafetyofcoalminingoperations. However,excessivedeformationofboreholescausedbyCBM extractioncanleadtoareductionintheeffectiveradiusofthe extractionboreholes.Thisstudyaimstoelucidatetherelationship betweentheeffectiveradiusofCBMextractionboreholesand boreholedeformation.Theresearchfindingsprovidevaluable insightsintothedesignandoptimizationofCBMextraction techniquesforimprovingcoalminingoperations. 1.Introduction Coalbedmethaneisoftentrappedwithincoalseams,creating potentialhazardsincoalminingactivities.Gasexplosionaccidents areoneofthemostsevererisksassociatedwithcoalmining.CBM extractionthroughdrillingboreholesprovidesaviablesolutionto mitigatethesehazardswhilealsoextractingvaluableenergy resources.However,highmethaneextractionratescanleadto boreholedeformation,reducingtheeffectiveradiusofthe extractionboreholesandaffectingtheoverallefficiencyofCBM extraction.Therefore,understandingtherelationshipbetweenthe effectiveradiusofCBMextractionboreholesandborehole deformationiscrucialforoptimizingtheextractionprocess. 2.Methodology 2.1FieldDataCollection Fielddatacollectionwillinvolvemeasuringthedeformation ofCBMextractionboreholesandcorrespondingchangesingas pressureovertime.ThedatawillbecollectedfromseveralCBM extractionsiteswithvaryinggeologicalconditions. 2.2ExperimentalSetup Laboratoryexperimentswillbeconductedtosimulatethe boreholedeformationunderdifferentgasextractionconditions. Syntheticcoalsampleswillbepreparedwithvaryingcoal properties.Drillingsimulationswillbecarriedoutwithcontrolled