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1、充填開采控制地表沉陷的關鍵因素分析瞿群迪,姚強嶺,李學華,榮同義(中國礦業(yè)大學礦業(yè)工程學院,江蘇徐州221116)摘要:充填開采是控制地表沉陷的有效技術手段之一.為了提高充填開采的地表沉陷控制效果,采用理論分析和數(shù)值計算研究方法,對采空區(qū)全部充填法的地表下沉系數(shù)進行了預計,分析了充填開采控制地表沉陷的各影響因素.研究表明:充填前頂?shù)装逡平?、充填體欠接頂量和充填體壓縮量是造成地表下沉三個關鍵因素,提高充填體的接頂率是減小充填開采地表下沉系數(shù)的最有效途徑,提高充填體強度可以在一定程度上提高對地表下沉的控制效果.關鍵詞:充填開采;地表沉陷;影響因素;充填體接頂率中圖分類號:TD82
2、3.7文獻標識碼:AKeyFactorsAffectingControlSurfaceSubsidenceinBackfillingMiningAbstract:Backfillingminingisoneofthemosteffectivetechnicalmeasurestocontrolsurfacesubsidence.Inordertoreprovethecontroleffectofsurfacesubsidencecausedbybackfillingmining,weestimatethesubsidencefactorofthefullgobackfillin
3、gandalsoanalyzehowthesefactorsaffectingthesurfacesubsidencethroughtheoreticalanalysisandnumericalcalculation.Theresultshowsthattheroof-to—floorconvergencebeforebackfilling,thegapthebackfillingbodyandroof,andthecompressionamountofthebackfillingbodyarethekeyfactoraffectingsurfacesubsidence.Tor
4、aisetheratioofbackfillingbodyheighttominingheightisthemosteffectivewaytoreducethesubsidencefactorsinbackfillingmining.Thesubsidencecontroleffectcanbealsoimprovedtoacertainextentbyincreasingthestrengthofthebackfillingbody.Keywords:backfillingmining;surfacesubsidence;influencingfactors;ratioof
5、backfilling;煤礦通風瓦斯在燃氣輪機中的催化燃燒特性尹娟翁一武(1.上海交通大學機械與動力工程學院,上海20003摘要:在不同進口溫度、工作壓力和當量比條件下,研究了煤礦通風瓦斯氣在燃氣輪機催化燃燒室內(nèi)部的燃燒特性,對數(shù)值模擬結(jié)果與試驗結(jié)果進行了對比,并分析了催化燃燒對超低濃度瓦斯氣性能的影響.結(jié)果表明:增加甲烷濃度(或當量比)可促進超低濃度甲烷的催化燃燒;提高催化燃燒室進I:/溫度或工作壓力可相應提高煤礦通風瓦斯燃氣輪機系統(tǒng)的效率.關鍵詞:燃氣輪機;煤礦通風瓦斯;超低濃度瓦斯氣;催化燃燒特性;數(shù)值計算CharacteristicsofCoaIMineVentilat
6、ionAirMethaneCombustedbyCatalyticinGasTurbineAbstract:Thecombustioncharacteristicsofthecoalmineventilationairmethaneinacatalyticcombustorofagasturbinewereinvestigatedunderdifferentinlettemperatures,operatingpressuresandequivalentceratios.Thesimulationresultswerecomparedwiththeexperimentresul
7、tsandtheinfluencefactorsofcatalyticcombustionthatcouldaffecttheactivityofultra—lowconcentrationmethanewerefound.ResultsshowthatthecatalyticcombustionoftheMethanewithultra-lowconcentrationcouldbearatedbyincreasingitsconcentration(orvalenceratio).The