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1、第21卷第3期中國礦業(yè)V01．21，No．32012年3月CHINAMININGMAGAZINEMar．2O12高承壓水體上開采煤層底板潛在突水區(qū)動態(tài)演化數(shù)值模擬陳陸望，劉金龍。，桂和榮。(1．合肥工業(yè)大學(xué)資源與環(huán)境工程學(xué)院，安徽合肥230009；2．合肥學(xué)院建筑工程系，安徽合肥230022；3．宿州學(xué)院地球科學(xué)與工程學(xué)院，安徽宿州234000)摘要：以底板受石炭系太原組灰?guī)r高承壓含水層威脅的淮北蘆嶺煤礦1O煤為研究示范，利用有限元軟件Plaxis8．2建立能模擬承壓水壓力的1O煤動態(tài)開采的數(shù)值模型，并考慮
2、冒落矸石密度、變形參數(shù)與強度參數(shù)隨時間的變化，分析底板采動破壞帶與潛在突水區(qū)域的時空分布及其影響因素。研究結(jié)果表明：正常開采條件下，底板破壞深度隨工作面推進(jìn)距離的加大而增加，推進(jìn)到一定距離后將達(dá)到極大值；隨著煤層傾角的增大，由于冒落巖體的充填效應(yīng)，開采冒落區(qū)導(dǎo)水裂隙提前閉合，潛在突水區(qū)域變小，并逐步集中于新近采空區(qū)；承壓水壓力越大，底板裂隙擴(kuò)展并最終相互溝通的可能性越大，當(dāng)承壓水壓力處于高值時，突水隨時可能發(fā)生。關(guān)鍵詞：數(shù)值模擬；高承壓水體；底板破壞；潛在突水區(qū)中圖分類號：P641．135文獻(xiàn)標(biāo)識碼：B文章
3、編號：1004—4051(2O12)03—0081—04Numericalsimulationofevolutionofpotentialwaterinrushareaincoalseamflooronthetopofhigh—confinedaquiferCHENLu—wang，LIUJin—long。，GUIHe—rong。(1．SchoolofResourceandEnvironmentalEngineering，HefeiUniversityofTechnology，Hefei230009，Chin
4、a2．DepartmentofCivilEngineering，HefeiUniversity，Hefei230022，China；3．SchoolofEarthSciencesandEngineering，SuzhouUniversity，Suzhou234000，China)Abstract：ModeledforthestudyonNo．10coalseamofLulingCoalinHuaibei，whoseseamflooristhreatenedbyhigh—confinedaquiferofCa
5、rboniferousTaiyuanFormationlimestone，thefiniteelementsoft—warePlaxis8．2isadoptedtOestablishnumericalsimulationwhichcansimulatethedynamicminingofNo．10coalseamonthetopofconfinedacquifer，consideringtherooffallingrockdensity，thechangeofde—formationparametersan
6、dstrengthparameterswithtime．Thespatialandtemporaldistributionandaffectedfactorsoffloorfailurezoneandpotentialwaterinrushareaareanalyzed．Theresultsshowthattherupturedepthoffloorwillincreasewiththeadditionofadvancingdistanceofworkingfaceinthenormalmining，the
7、nitwillreachamaximumvaluewhenworkingfacereachacertaindistance；andthatwaterconductedcrackofcollapsedzoneclosesaheadwiththeincreaseofcoalseamdipbecauseofthefillingeffectofrooffailingrock，andpotentialwaterinrushareabecomessmall，andgraduallyfocusesontherecentg
8、oaf；andthatthegreaterthepressureofhigh—confinedaquiferis，thegreaterthelikelihoodofcrackpropagationandultimateconnectionwitheachotheris，andwhenthepressureofconfinedaquiferisinthehighvalue，waterinrushmayoccurat
