本文選題：巖石力學(xué) + 千枚巖��； 參考：《中國(guó)礦業(yè)》2017年01期

【摘要】：為研究具有層理結(jié)構(gòu)巖石的巖爆傾向性,以西鞍山鐵礦地區(qū)的層理千枚巖為研究對(duì)象,現(xiàn)場(chǎng)取樣并加工為標(biāo)準(zhǔn)試樣,使用剛性壓力機(jī)進(jìn)行單軸加卸載壓縮試驗(yàn)。對(duì)試驗(yàn)結(jié)果進(jìn)行分析,揭示了西鞍山鐵礦地區(qū)千枚巖的破壞特征,在室內(nèi)巖石力學(xué)試驗(yàn)的基礎(chǔ)上,結(jié)合線彈性能判據(jù)(PES)及彈性能量指數(shù)(WET)對(duì)不同層理角度下的巖石巖爆傾向性定量分析。結(jié)果表明:千枚巖強(qiáng)度在加載方向與層理夾角為0°、90°時(shí)最高,30°、45°時(shí)較低,60°最低,總體呈現(xiàn)出U型變化規(guī)律;千枚巖的彈性模量隨夾角的增大逐漸增大:PES、WET指標(biāo)均顯示,千枚巖的巖爆傾向性呈0°最大,90°次之,60°最小的類U型變化趨勢(shì)。研究結(jié)果為在層理巖石內(nèi)開(kāi)拓巷道、確定巷道走向及進(jìn)行巷道支護(hù)等方面提供了有益參考。
[Abstract]:In order to study the rockburst tendency of rocks with bedding structure, the stratified phyllite in Anshan Iron Mine area in the west of China was studied. The in-situ sampling and processing were used as standard samples, and the uniaxial loading and unloading compression tests were carried out by rigid press. By analyzing the test results, the failure characteristics of phyllite in Xianshan Iron Mine area are revealed. Combined with linear elastic energy criterion (PES) and elastic energy index (WETT), quantitative analysis of rock burst tendency at different bedding angles is carried out. The results show that the strength of phyllite is the lowest when the loading direction and bedding angle is 0 擄~ 90 擄and the maximum is 30 擄~ 45 擄, which shows the rule of U-shaped variation, and the elastic modulus of phyllite increases gradually with the increase of the angle. The tendency of rock burst tendency of phyllite is the same as that of 0 擄maximum 90 擄0 擄and 60 擄minimum U-like trend. The results provide a useful reference for developing roadway in stratified rock, determining roadway direction and supporting roadway.
【作者單位】： 北京科技大學(xué)土木與環(huán)境工程學(xué)院;北京科技大學(xué)金屬礦山高效開(kāi)采與安全教育部重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目資助(編號(hào):51474016)
【分類號(hào)】：TD31

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本文編號(hào)：1977291