發(fā)布時(shí)間：2019-02-25 18:06

【摘要】：天坪隧道穿越含有害氣體非煤地層,為解決采用大量地質(zhì)鉆探預(yù)報(bào)成本高且嚴(yán)重影響施工進(jìn)度的問(wèn)題,根據(jù)前期有害氣體的出現(xiàn)位置以及巖層厚度、產(chǎn)狀等信息,利用隧道與巖層走向間的已知條件,采用區(qū)域地層厚度和產(chǎn)狀測(cè)量、隧道與巖層關(guān)系投影計(jì)算、斜井預(yù)報(bào)正洞等綜合預(yù)報(bào)方法,計(jì)算出有害氣體在某一巖層的賦存范圍,進(jìn)而推測(cè)出下一階段有害氣體在隧道內(nèi)出現(xiàn)的位置,然后通過(guò)少量鉆探進(jìn)行驗(yàn)證,使超前地質(zhì)鉆孔更有針對(duì)性,可大大縮減鉆孔數(shù)量,節(jié)約施工時(shí)間。天坪隧道采用該方法取得了較好的應(yīng)用效果,能準(zhǔn)確預(yù)測(cè)有害氣體的位置,為提前進(jìn)行設(shè)計(jì)優(yōu)化和施工組織提供依據(jù)。
[Abstract]:Tianping Tunnel passes through non-coal strata containing harmful gases. In order to solve the problem of high cost of geological drilling prediction and serious influence on construction progress, according to the location of harmful gas in the early stage, the thickness and occurrence of strata, and so on, Based on the known conditions between tunnel and rock strike, regional thickness and occurrence measurement, projection calculation of tunnel-rock relationship, prediction of forward hole in inclined well and so on, the occurrence range of harmful gas in a certain rock stratum is calculated. Then the location of harmful gas in the tunnel in the next stage is deduced and verified by a small amount of drilling, which makes the advance geological drilling more targeted, and can greatly reduce the number of drilling holes and save the construction time. This method can accurately predict the position of harmful gases and provide basis for design optimization and construction organization in advance.
【作者單位】： 中鐵隧道集團(tuán)一處有限公司;中鐵隧道勘測(cè)設(shè)計(jì)院有限公司;
【分類號(hào)】：U456.3

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