突出煤体吸附-解吸瓦斯变形特性试验研究.doc

《突出煤体吸附-解吸瓦斯变形特性试验研究.doc》由会员上传分享，免费在线阅读，更多相关内容在工程资料-天天文库。

1、极松软煤体高压吸附过程中变形特性试验研究刘延保V(1.瓦斯灾害监控与应急技术国家重点实验室，重庆400037：2.中煤科工集团重庆研究院有限公司，重庆400037)摘要：突出煤层大都层理紊乱、存在煤质极其松软的软分层，软分层吸附瓦斯和释放瓦斯的能力比硬分层大许多，突出危险性更大。为分析软分层在高压条件下的吸附变形特性，研制了煤层瓦斯吸附解吸变形动态测试装置，并利用该装置进行了恒温定容条件下煤样吸附、解吸瓦斯过程中吸附量与应变的同步测试。研究结果表明：等温吸附曲线、等温解吸曲线和等温吸附应变曲线均服从

2、朗格缪尔方程，等温解吸应变曲线服从改进的朗格缪尔方程；软分层吸附一解吸过程可逆，吸附一解吸变形不可逆；瓦斯吸附量与体应变呈非线性关系。通过对实验数据的统计分析，建立了软分层煤体应变与吸附量的精确拟合方程。关键词：极松软煤体；软分层；瓦斯吸附量；吸附变形；恒温定容中图分类号：TD713文献标志码：AExperimentalInvestigationontheDeformationCharacteristicsunderHighPressureAbsorptionofUltraSoftCoalLIUYa

3、nbao12(1.StateKeyLaboratoryofGasDisasterMonitoringandEme/'gencyTechnology,Chongqing400037,China;2.ChinaCoalTechnology'andEngineeringGroupChongqingResearchInstitute,Chongqing400037.China)Abstract：Mostoutburstcoalscamswithbeddingdisorderandcoalqualityext

4、remelysofthierarchicallayers,theabsorbandreleasegasabilityofsofthierarchicallayerismorethanthehardhierarchicallayer,socoalandgasoutburstdangerousisgreater。Inordertoinvestigatethecharacterbehaviorofswellingdeformationandcontractiondeformationefleetofsof

5、thierarchicallayerunderhighpressure,thedynamictestingdeviceofgasadsorptiondesoiptiondef()nnationofcoalseamwasdeveloped,andthedevicewasusedtoperformthesynchronoustestofadsorptionandstrainundertheconstanttemperatureandvolume,fherelationbetweenbodystraina

6、ndgasadsorptionisdiscussed・Theresultsshowthattheisothermaladsorptioncurve,theisothermaldesorptioncurveandtheisothermaladsoiptivcdeformationcurvewillfollowtheLangmuircequation,whiletheisothermaldcsorptivcdeformationcurvewillfollowtheImprovedLangmuirccqu

7、ation.Theprocessofadsorption-desorptionisreversible,whiletheadsorption-desorptiondefonnationofsofthierarchicallayerisirreversible・Bodystrainandthevolumeofgasadsorptionarenonlinearlyrelated.Usingtheanalysisresultsofexperiment,thebodystrainandadsorptionq

8、uantityprecisefittingequationofsofthierarchicallayerwasestablished.Keywords：ultrasoftcoal：softlayered：adsorption；adsorptivedelonnation；constanttemperatureandvolume近年来，随着国内外研究者对煤岩瓦斯动力灾害发生机制、瓦斯抽采、以及二氧化碳煤层封存等收稿日期：基金项目：国家“十三五”科技重大专项(2016ZX0