資源描述:
《專題 厚煤層綜采放頂煤礦山壓力顯現(xiàn)規(guī)律淺析.doc》由會(huì)員上傳分享,免費(fèi)在線閱讀,更多相關(guān)內(nèi)容在工程資料-天天文庫(kù)。
1、專題部分厚煤層綜釆放頂煤礦山壓力顯現(xiàn)規(guī)律淺析馬建(中國(guó)礦業(yè)大學(xué)礦業(yè)工程學(xué)院)摘要:中國(guó)具有豐富的天然資源,特別是厚煤層儲(chǔ)量占全國(guó)煤炭總儲(chǔ)量40%?46%的煤炭資源,因此,厚煤層開(kāi)采技術(shù)成為影響中國(guó)煤炭行業(yè)技術(shù)水平的關(guān)鍵因素,同時(shí)也影響著行業(yè)經(jīng)濟(jì)效率。一般的,厚煤層開(kāi)采與單煤層開(kāi)采的區(qū)別是增加了一倍的單次采高,支架上有一層破碎的頂煤,所以其結(jié)構(gòu)工作面形成負(fù)載需要通過(guò)直接傳遞到頂煤頂板的是不再直接支持對(duì)象的液壓支架,從而顯示出采場(chǎng)壓力不僅要看直接頂和覆巖運(yùn)動(dòng),而且還依賴于頂煤,發(fā)展和支架剛度的頂煤破碎程度的性質(zhì)。因此,研究了厚煤層開(kāi)
2、采條件下頂板的活動(dòng),分析其礦壓顯現(xiàn)是必要的。本文共分為五個(gè)部分,分別介紹了大采高綜放開(kāi)采的煤巖冒放規(guī)律;夾肝厚煤層綜放礦壓規(guī)律;松軟厚煤層工作面礦壓顯現(xiàn)規(guī)律;厚煤層綜放工作面礦壓顯現(xiàn)以及特厚煤層綜放工作面礦壓顯現(xiàn)規(guī)律,并分別在一些厚煤層礦井生產(chǎn)綜放工作面為工程背景進(jìn)行了淺析,從支架工作阻力分布,以及頂煤頂板運(yùn)動(dòng)特征,巷道超前支護(hù)段面變形分析冋采面礦壓顯現(xiàn)規(guī)律特性,為類(lèi)似條件下綜放工作面安全生產(chǎn)提供參考。關(guān)鍵詞:厚煤層,綜采放頂煤,礦壓顯現(xiàn)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綜放開(kāi)采的煤巖冒放規(guī)律1」影響厚煤層綜放開(kāi)采的煤巖冒放規(guī)律的主要因素釆礦技術(shù)及影響因素的確定在本質(zhì)上放頂煤