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1、专题部分厚煤层综釆放顶煤矿山压力显现规律浅析马建(中国矿业大学矿业工程学院)摘要:中国具有丰富的天然资源,特别是厚煤层储量占全国煤炭总储量40%〜46%的煤炭资源,因此,厚煤层开采技术成为影响中国煤炭行业技术水平的关键因素,同时也影响着行业经济效率。一般的,厚煤层开采与单煤层开采的区别是增加了一倍的单次采高,支架上有一层破碎的顶煤,所以其结构工作面形成负载需要通过直接传递到顶煤顶板的是不再直接支持对象的液压支架,从而显示出采场压力不仅要看直接顶和覆岩运动,而且还依赖于顶煤,发展和支架刚度的顶煤破碎程度的性质。因此,研究了厚煤层开
2、采条件下顶板的活动,分析其矿压显现是必要的。本文共分为五个部分,分别介绍了大采高综放开采的煤岩冒放规律;夹肝厚煤层综放矿压规律;松软厚煤层工作面矿压显现规律;厚煤层综放工作面矿压显现以及特厚煤层综放工作面矿压显现规律,并分别在一些厚煤层矿井生产综放工作面为工程背景进行了浅析,从支架工作阻力分布,以及顶煤顶板运动特征,巷道超前支护段面变形分析冋采面矿压显现规律特性,为类似条件下综放工作面安全生产提供参考。关键词:厚煤层,综采放顶煤,矿压显现Abstract:Chinahasabundantnaturalresources,espe
3、ciallythickcoalreservesaccountingfor40%oftotalcoalreservesto46%ofcoalresources,sothickseamminingtechnologyhasbecomeakeyfactoraffectingthetechnicallevelofChina'scoalindustry,butalsoaffecttheindustryeconomicefficiency.Ingeneral,thedifferencebetweenasinglethickseamminin
4、gandcoalminingistoincreasetheone-timeminingheight,withalayerofcrushedcoalontopofthebracket,sothestructureofthefacetoformtheloadtransmitteddirectlythroughthetopcoalroofisnolongerdoubleddirectsupportforobjecthydraulicsupport,thusshowingnotonlylookatthedirectpressureofs
5、toperoofandoverlyingrockmovement,butalsoonthenatureofthetoplevelofthetopcoalcrushingcoal,developmentandbracketstiffness.Therefore,thestudyoftheconditionsundertheroofofthickseamminingactivities,analyzeitsminepressurebehaviorisnecessary.Thispaperisdividedintofiveparts,
6、eachdepictingalargefullymechanizedcoalcavingminingrockcavinglaw;thickseampartingsrockpressurelaw;softthickCoalSeamStrataBehavior;ThickCoalSeamStratapressurebehaviorandspecialthickcoalSeamStrataBehavior,andwereinsomethickcoalmineproductionoffullymechanizedcavingfacean
7、alysisconductedfortheengineeringbackground,rangedfromsupportworkingresistance,aswellasrooftopcoalmovementcharacteristics,roadwayforepolingsegmentsurfacedeformationanalysisstopesStrataBehaviorcharacteristics,undersimilarconditionsforthesafeproductionoffullymechanizedc
8、avingfacereference.Keywords:thickcoalseammechanizedcavingminepressurebehavior1综放开采的煤岩冒放规律1」影响厚煤层综放开采的煤岩冒放规律的主要因素釆矿技术及影响因素的确定在本质上放顶煤