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时间:2017-12-08
《薄煤层冲击矿压发生机理及防治研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、第34卷第1期西安科技大学学报Vo1.34No.12014年01月JOURNALOFⅪ’ANUNIVERSnYOFSCIENCEANDTECHNOL0GYJan.2014文章编号:1672—9315(2014)O1—0033—05薄煤层冲击矿压发生机理及防治研究王占立,刘丹,朱亚辉(1.黑龙江科技大学安全工程学院,黑龙江哈尔滨150027;2.演马庄矿,河南焦作454000;3.崔庙矿,河南荣阳450131)摘要:分析了崔庙矿薄煤层诱发冲击矿压的原因,验证了薄煤层深部开采时具有冲击矿压现象,实验研究了
2、薄煤层的冲击矿压危险性与煤岩体的结构特征的关系,即组合煤岩试样的冲击能指数随着顶板与煤样高度比值的增加而增加,随着煤岩高度比减小,组合煤岩单轴抗压强度增大,煤层厚度的变化对煤体中的应力分布有着很大的影响,探讨了薄煤层应力分布及转移规律和冲击矿压机理,即煤层越薄,煤体承载能力越强,越不容易产生应力转移,由于开采煤体,引起峰值应力区垂直应力升高,水平应力对煤体约束减小,导致冲击矿压。文中以崔庙矿为工程研究背景,通过设置切顶巷和顶板深孔爆破降低了冲击危险性,取得了显著效果,验证了薄煤层开采切顶巷防冲技术和顶
3、板预裂爆破技术的可行性。关键词:薄煤层;冲击矿压;组合煤岩样;坚硬顸板;切顶巷中图分类号:TD324文献标志码:AOccurrencemechanismandpreventionresearchonrockburstofthincoalseamWANGZhan.1.i.,LIUDan,ZHUYan—hui(1.CollegeofSafetyEngineering,HeilongfiangInstituteofScience&Technology,Harbin150027,China;2.Yanmazh
4、uangCoalMine,Jaozuo454000,China;3.CuimiaoCoalMine,Rongyang450131,China)Abstract:Thepaperanalyzedthecauseofrockburstsinthincoalseam,Toverifythethincoalseamindeepmininghastherockburstphenomena,andexperimentallystudiedtherelationshipbetweenthecoalrockburst
5、andthestructureofcoalrockstrata,Theindexofburstenergyofthecombinedsampleincrea-seswiththeincreaseofheightratioofrooftocoal,theuniaxialcomprehensivestrengthincreaseslinearlywiththedecreaseofheightratioofcoalandrockofcoal-rockcompoundsamples.Thicknessofco
6、alseamplaysagreatroleintheverticaldistributionofstressincoa1.Finally,discussedmechanismandthestressdistributionandtransferenceofrockburstinthincoalseam,thatis,thethinnerthecoalseam,thestron-gerthecarryingcapacityofcoalis,themoreitisnoteasytoproducestres
7、stransfer,andthestresstrans—ferenceoftheverticalstressincreasingandthehorizontalstressabruptdecreasinginpeakstresszone,resultinginthehappeningofrockbursts.TakingCuimiaoMineasresearchobject,therockbursthazardisdecreasedwiththecuttingroofroadwayandroofdee
8、p—holeblasting,andnotableeffecthasbeenreached,provingthefeasibilityofcuttingroofroadwayrockburstpreventiontechnologyandroofpre—splittingblastingtechnologyforthincoalseamgroupmining.Keywords:thincoalseam;rockburst;coal-rockcombina
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