祁东井田地应力场特征及其对煤与瓦斯突出的影响

第42卷第2期煤田地质与勘探Vol.42No.22014年4月COALGEOLOGY&EXPLORATIONApr.2014收稿日期:2013-01-26基金项目:(2011ZX05040-005)(101100910700)作者简介:(1987—).文章编号:1001-1986(2014)02-0009-05祁东井田地应力场特征及其对煤与瓦斯突出的影响赫少攀1，林青2，张朝举2，张玉贵1(1.河南理工大学安全科学与工程学院，河南焦作454003；2.安徽恒源煤电股份有限公司祁东煤矿，安徽宿州234000):地应力是煤与瓦斯突出的重要动力，区域应力场是不同期次构造运动在该区域综合作用的具体体现。结合区域应力场和区域构造断块划分，研究了祁东井田应力场及其对煤与瓦斯突出的影响。结果表明：祁东井田最大、中间、最小主应力与煤层埋深呈正相关关系，且其最大主应力明显比位于华北地区的焦作中马村矿，平顶山一矿、六矿、八矿，以及华东地区的淮南潘一矿、谢一矿都大得多；祁东井田处在高应力区，地应力是9号煤层25次煤与瓦斯突出的主导因素；该井田东部地应力较集中，瓦斯含量大，煤与瓦斯突出危险性较大。：地应力；地质构造；煤与瓦斯突出：TD713：ADOI:10.3969/j.issn.1001-1986.2014.02.002GroundstressfieldcharacteristicsandtheirinfluenceoncoalandgasoutburstinQidongwellfieldHEShaopan1,LINQing2,ZHANGChaoju2,ZHANGYugui1(1.SchoolofSafetyScienceandEngineering,HenanPolytechnicUniversity,Jiaozuo454003,China;2.QidongMineofAnhuiHengyuanCoal-electricityCo.,Ltd,Suzhou234000,China)Abstract:Groundstressistheimportantpowerofcoalandgasoutburst,regionalstressfieldistheconcretere-flectionofthecomprehensiveresultsoftectonicmovementsofdifferentperiodsinaregion.Combiningregionalstressandregionaltectonicfaultblockdivision,thepaperstudiedQidongstressfieldandtheimpactoncoalandgasoutburst.Theresultsshowthattherelationshipbetweencoalseamdepthandmaximum,intermediate,minimumprincipalstressofQidongwellfieldispositivecorrelation.FurthermorethemaximumprincipalstressisobviouslymuchgreaterthanthatofJiaozuoZhongmacunmine,PingdingshanNo.1mine,No.6mine,No.8minelocatedinNorthChinaandHuainanPanyimine,XieyiminelocatedinEastChina.AsQidongwellfieldisinthehighstressregion,groundstressistheprimaryfactorof25coalandgasoutburstsinNo.9seam.Thegroundstressisconcen-tratedintheeastofthefieldandthegascontentisveryhigh,leadingtothegreatdangerofcoalandgasoutburstintheregion.Keywords:groundstress;geologicstructure;coalandgasoutburst3[1][2][3](A.Heim)1912[4]71[2][5][6][3]·10·煤田地质与勘探第42卷[7][8][9][10]−1矿井概况10°~15°33F223261718295150104t20012构造应力场分析2.1()[11]EWSNEWNNE[12]NE1EWNE1—2—3—4—5—6—7—1Fig.1ModerntectonicstressfieldinAnhuiProvince2.2ⅠⅡⅠ5Ⅱ6ⅠⅡ1()“25”(2)“105”“24”“101”“27”“34”“24”“25”Ⅰ-2Ⅰ-3Ⅰ-5Ⅱ-1Ⅱ-6第2期赫少攀等:祁东井田地应力场特征及其对煤与瓦斯突出的影响·11·表1Ⅰ级和Ⅱ级断裂特征表Table1CharacteristicsoflevelandfaultsⅠⅡ/(°)-1-2−-3−-410~15−-510~20-1305-212−-3-4-5320~330-620−2ⅠⅡFig.2Level,faultsinNorthernAnhui3祁东井田应力场测量3.1−408m−500m−600m1(2)333.232EW1表2地应力测试地点Table2Locationofgroundstressmeasurement/m/m/m/(°)/(°)1−4084299.75332−5005219.459943−6006218.451084.53NENEE-EW13334.9°3−408m−500m2.21MPa2.79MPa2.24MPa0.024MPa/m0.030MPa/m0.024MPa/m−500−6003.40MPa2.26MPa2.14MPa0.034MPa/m0.023MPa/m0.021MPa/m−408−6005.61MPa5.05MPa4.38MPa0.029MPa/m0.026MPa/m0.023MPa/m·12·煤田地质与勘探第42卷表3地应力实测结果Table3Groundstressmeasurementresult3/MPa/(°)/(°)σ1/σ2σ1/σ3σ2/σ3σ123.6849.4−4.5σ211.11−54.271.61σ37.94140.917.82.132.981.40σ125.8994.22.7σ213.90−11.679.92σ310.18184.69.71.862.541.37σ129.2942.634.9σ216.1623.853.63σ312.32126.29.01.812.381.31(3)σ1σ2σ1σ3σ2σ33Fig.3Relationshipbetweenprincipalstressanddepth3(4)555m()()4地应力对煤与瓦斯突出的影响2625915.2~502m33.2t104t916~36MPaSNNW(EWNE)11.61m3/t(529.24m)255结论a.EWNEb.c.σ1σ2σ1σ3σ2σ3d.925第2期赫少攀等:祁东井田地应力场特征及其对煤与瓦斯突出的影响·13·表4其他矿区地应力实测数据与祁东井田等深推测值对比表[13-16]Table4ComparisononmeasuredgroundstressdatainotherminingareasandpredicteddataatthesamedepthinQidongwellfield/MPaσ1σ2σ3/m29412.1919.488.397.627.184.6835513.6121.258.279.216.466.0254317.1426.7015.1514.1010.9810.1654923.0626.8713.2114.2512.1810.2967325.230.4717.7817.4812.8913.0279331.233.9521.3720.6017.8915.6644019.0323.7112.6611.4211.407.8955528.1327.0519.0614.4115.2610.4265222.3929.8617.6516.9314.2012.5654725.7426.8114.1114.2010.0510.2565728.630.0015.5117.0610.1412.6741714.6223.0411.3510.827.237.3952416.7226.1412.2513.609.079.7456218.2927.2510.8214.598.3810.58参考文献[1].[J].1978(00)20−32.[2].[J].1985(3)2−6.[3].[M].2001151−164.[4].[M].1990.[5].[J].199419(3)304−314.[6].[J].19973(1)88−94.[7].[J].200728(2)71−74.[8].[J].200930(9)1326−1329.[9].[J].201037(1)223−228.[10].−[J].201218(3)453−459.[11].[M].2009.[12].[J].199419(2)129−138.[13].[J].200928(6)1−3.[14].[M].2004.[15].[J].200423(23)4033−4037.[16].[J].200929(1)144−148.[17].[M].2007.[18].[J].200716(3)88−91.[19].[J].200019(2)234−237.[20].[J].199615(1)1−4.[21].[J].200827(12)2557−2561.[22].[J].201239(1)6−13.[23].[J].200627(3)348−350.[24].[J].200827(12)2473−2481.[25].[J].200680(10)1627−1632.