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1、第38卷第5期煤炭科学技术Vol38No52010年5月CoalScienceandTechnologyMay2010坚硬厚煤层综放采场顶煤破裂特征的实测分析111,211,3刘跃俊,刘长友,王美柱,吴晓东,滕向东(1.中国矿业大学矿业工程学院,江苏徐州221008;2.中国矿业大学出版社,江苏徐州221008;3.兖州矿业集团有限责任公司济宁二号井,山东济宁227005)摘要:基于综放采场顶煤体在支架上方裂隙发育程度和破碎特征,为确定综放开采顶煤冒放性和合理的放煤参数提供依据。在综放面支架上方打
2、穿煤层钻孔,采用钻孔摄像仪记录顶煤裂隙的发育情况。从钻孔摄像中取得的影像资料出发,分析了支架上方特厚坚硬顶煤沿厚度方向的破碎特征,进而分析了其破碎机理,并提出了合理的放煤参数,为特厚坚硬煤层综放开采进一步提高顶煤采出率提供技术支持和依据。关键词:坚硬厚煤层;顶煤破裂;钻孔摄像仪;放顶煤;冒放性中图分类号:TD323文献标志码:A文章编号:0253-2336(2010)05-0020-04SiteMeasurementAnalysisonTopCoalFractureFeaturesofFullyMechani
3、zedTopCoalCavingMiningFaceinThickHardSeam111,211,3LIUYuejun,LIUChangyou,WANGMeizhu,WUXiaodong,TENGXiangdong(1.SchoolofMiningEngineering,ChinaUniversityofMiningandTechnology,Xuzhou221008,China;2.PublishingHouse,ChinaUniversityofMiningandTechnology,Xuzhou221
4、008,China;3.JiningNo2Mine,YanzhouCoalMiningGroupCorporationLtd.,Jining227005,China)Abstract:Basedonthefissuredevelopmentdegreeandfracturefeaturesoftopcoalabovethehydraulicpoweredsupportsinthefullymechanizedtopcoalcavingminingface,inordertoprovidethebasicstosetu
5、ptherationaltopcoalcavingparametersforthefullymechanizedtopcoalcavingpossibility,boreholedrillingswereconductedinthetopcoalseamabovethehydraulicpoweredsupportsofthefullymechanizedtopcoalcavingminingface.Aboreholecamerahadrecordedthefracturedevelopment.Basedonthe
6、imageinformationfromtheboreholecamera,thepaperanalyzedthefracturefeaturesoftheultrathickhardtopcoalabovethehydraulicpoweredsupportsalongthethicknessdirectionandfurtheranalyzedthefracturemechanism.Thepaperprovidedtherationalcoalcavingparameters,whichcouldbethebasi
7、cstofurtherimprovethetopcoalminingratefromthefullymechanizedtopcoalcavingminingintheultrathickhardseam.Keywords:thickhardseam;topcoalfracturefeatures;boreholecamera;topcoalcaving;cavability明,沿走向顶煤的完整性可分为4个区,即完整1概述区、破坏发展区、裂隙发育区、破碎区。裂隙发育研究认为,在开采引起的矿山压力和支架的支区通常
8、指的是煤壁前方5m以内到煤壁后方2m以撑作用下,顶煤破碎成散体从支架的放煤口放内的范围,在裂隙发育区,支架的支撑-卸载作用[1-4]出。顶煤的裂隙始于煤壁前方初始破坏区,在将促使下位顶煤2m以内范围的裂隙进一步发展,支承压力作用下,顶煤发生剪切、拉伸和挤压破并伴有新的裂隙产生。因此,当顶煤较软较薄时,坏,煤体内原生节
