發(fā)布時間：2018-02-27 07:09

  本文關(guān)鍵詞： 層狀鹽巖 脆硬夾層 單軸壓縮 三軸壓縮 力學(xué)特性　出處：《巖土力學(xué)》2017年11期 　論文類型：期刊論文

【摘要】：為研究夾層特征變化對含夾層鹽巖力學(xué)特性及破壞的影響,克服了現(xiàn)場取樣的困難,利用自行壓制的含夾層鹽巖,在試驗(yàn)室進(jìn)行了單軸和三軸壓縮試驗(yàn)。試驗(yàn)結(jié)果表明:夾層和鹽巖之間的變形差異對含夾層鹽巖的強(qiáng)度、彈性模量等力學(xué)特性參數(shù)有重大影響。單軸壓縮條件下,含夾層鹽巖破壞均為由夾層擴(kuò)展至鹽巖的軸向劈裂;含夾層鹽巖強(qiáng)度隨夾層厚度的增加趨于降低;含雙夾層鹽巖強(qiáng)度低于含單夾層鹽巖;夾層傾角的存在會對含夾層鹽巖的強(qiáng)度、彈性模量有削弱作用,并且破壞形式屬于滑移和劈裂的綜合。三軸壓縮條件下,含夾層鹽巖的抗壓強(qiáng)度、彈性模量、峰值載荷變形量均低于純鹽巖;純鹽巖為側(cè)向膨脹破壞,沒有明顯的破裂面,而含夾層鹽巖中的泥巖夾層部分表現(xiàn)為剪切破壞的特征,鹽巖層部分為側(cè)向膨脹。其研究結(jié)果為層狀鹽巖儲庫的建造和運(yùn)營提供了有力的試驗(yàn)依據(jù)。
[Abstract]:In order to study the influence of intercalation characteristics on the mechanical properties and failure of intercalated salt rock, the difficulty of sampling in situ was overcome, and the self-compacting intercalated salt rock was used. Uniaxial and triaxial compression tests were carried out in the laboratory. The results show that the deformation difference between intercalation and salt rock has great influence on the strength and elastic modulus of intercalated salt rock. The failure of intercalated salt rock is axial splitting from intercalation to salt rock, the strength of intercalated salt rock tends to decrease with the increase of intercalation thickness, and the strength of double intercalated salt rock is lower than that of single intercalated salt rock. The existence of intercalation dip angle will weaken the strength and elastic modulus of intercalated salt rock, and the failure form belongs to the combination of slip and splitting. Under the condition of triaxial compression, the compressive strength and elastic modulus of the salt rock with intercalated intercalation, The peak load deformation is lower than that of pure salt rock, the pure salt rock is lateral dilatant failure, and there is no obvious fracture surface, while the mudstone intercalation part of intercalated salt rock shows the characteristic of shear failure. The results of the study provide a powerful experimental basis for the construction and operation of layered salt reservoir.
【作者單位】： 中北大學(xué)理學(xué)院;太原理工大學(xué)礦業(yè)工程學(xué)院;
【基金】：國家自然科學(xué)基金青年基金資助項(xiàng)目(No.51504220)~~
【分類號】：TU458.3
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本文編號：1541658