freepeople性欧美熟妇, 色戒完整版无删减158分钟hd, 无码精品国产vα在线观看DVD, 丰满少妇伦精品无码专区在线观看,艾栗栗与纹身男宾馆3p50分钟,国产AV片在线观看,黑人与美女高潮,18岁女RAPPERDISSSUBS,国产手机在机看影片

正文內(nèi)容

采礦工程畢業(yè)設(shè)計論文-祁東煤礦18mta新井設(shè)計-資料下載頁

2025-08-24 15:11本頁面

【導(dǎo)讀】以實習(xí)礦井祁東煤礦條件為基礎(chǔ),完成祁東煤礦。計、采煤方法、礦井通風(fēng)系統(tǒng)、礦井運(yùn)輸提升等。決實際問題的能力;④工作量的大??;⑤取得的主要成果及創(chuàng)新點(diǎn);⑥寫作的規(guī)范程度;一般部分針對宿州祁東礦進(jìn)行了井型為。祁東礦井位于安徽省宿。州市東南,井田走向長約,傾向長約4.0km,面積約2km。井田工業(yè)儲量為,可采儲量,礦井服。瓦斯涌出量為3/mh,屬高瓦斯礦井。考慮到本礦井為高瓦斯礦井,礦井通風(fēng)方式采分區(qū)對角式通風(fēng),并在開采前預(yù)。掘底板瓦斯抽排巷進(jìn)行瓦斯提前卸壓抽放。運(yùn)料、排矸、供電系統(tǒng)設(shè)計。該工作面煤層平均厚度為,平均傾角。14°,直接頂為泥巖,老頂為砂巖。采煤機(jī)割煤,往返一次割兩刀。采用“三八制”工作制度,截深,每天四個循環(huán),循環(huán)進(jìn)尺,月推進(jìn)度104m。大巷采用膠帶輸送機(jī)運(yùn)煤,輔助運(yùn)輸采用架電式式電機(jī)車牽引固定箱式礦車。的礦車雙層四車寬罐籠運(yùn)料和升降人員。論研究,進(jìn)行了詳實的數(shù)據(jù)收集與整理,對礦井生產(chǎn)實踐具有顯著的指導(dǎo)意義。

  

【正文】 cycle. ThreeEight working system has been used in this design and the depthweb is m with fou working cycles per day, and the advance of a working cycle is m and the advance is 104 m per month. Main roadway makes use of belt conveyor to transport coal resource, and overhead line electric lootiveto be assistant transport. The main shaft uses double 12 t skips to lift coal with a balance hammer and the auxiliary shaft uses a twins t fourcar doubledeck cage and a wide fourcar doubledeck cage to lift material and personnel transportation. The monographic study entitled Pressure behavior and control of deep mine , with the theoretical research related engineering test, conducted a detailed pressure observation data collection and processing, gave the deformation and convergence law of soft rock roadway,with law we can remend some control measures which really have a important influence. The title of the translated academic paper is Numerical modelling of the effects of weak immediate roof lithology on coal mine roadway stability,which mainly introduce the failed pillars of engineering practice by pressure arch theory and numerical simulation. Keywords:Qidong coal mine。 double vertical shaft。 district mode。 fullheight coal caving。16
點(diǎn)擊復(fù)制文檔內(nèi)容
畢業(yè)設(shè)計相關(guān)推薦
文庫吧 www.dybbs8.com
備案圖鄂ICP備17016276號-1