本文選題：巖爆 + 深埋巷道�。� 參考：《中國鎢業(yè)》2016年01期

【摘要】：巖爆是開采深部礦床常遇到的難題,會對礦山企業(yè)造成巨大的損失。為了預(yù)測深部礦床圍巖的巖爆活動,文章針對某金屬礦深埋巷道開挖工程,首先通過室內(nèi)巖石力學(xué)試驗獲取多個圍巖巖爆傾向性指標(biāo)值,并以有效沖擊能量指標(biāo)W為主,其他指標(biāo)為輔,判定礦區(qū)各圍巖的巖爆傾向。在此基礎(chǔ)上,依據(jù)基于最大主應(yīng)力的巖爆判別準(zhǔn)則,對不同深度的大理巖和花崗閃長斑巖兩種圍巖的巷道開挖進(jìn)行了數(shù)值模擬計算,由此判定了巷道周邊各部位的巖爆等級。結(jié)果表明:該礦區(qū)埋深為450~1 050 m的兩種圍巖巷道不同部位,開挖完成后均可能出現(xiàn)中等至高等的巖爆活動,各部位的巖爆等級排序為底板兩側(cè)巷道兩幫拱頂內(nèi)緣;埋深情況相同的兩種圍巖巷道,花崗閃長斑巖巷道發(fā)生巖爆的等級更高。該研究結(jié)果為深埋巷道的開挖及制定合理的巖爆預(yù)防措施提供了依據(jù)。
[Abstract]:Rock burst is a difficult problem often encountered in mining deep ore deposits, which will cause huge losses to mining enterprises. In order to predict the rockburst activity in the surrounding rock of deep ore deposit, aiming at the excavation of deep buried roadway in a metal mine, this paper first obtains several rock burst tendency index values by indoor rock mechanics test, and mainly takes the effective impact energy index W as the main factor. Other indicators are supplementary to determine the rock burst tendency of each surrounding rock in mining area. On this basis, according to the criterion of rock burst discrimination based on the maximum principal stress, the excavation of two kinds of surrounding rock of marble and granodiorite with different depths is numerically simulated, and the grade of rock burst around the roadway is determined. The results show that two kinds of surrounding rock roadways with a depth of 450 ~ 1050m are likely to occur moderate to higher rockburst activities after excavation, and the order of rock burst grades of each part is the inner edge of two side arch roof of roadway on both sides of bottom plate. The rock burst of granodiorite porphyry roadway is higher in two kinds of surrounding rock roadways with the same buried depth. The results provide a basis for excavation of deep-buried roadway and reasonable prevention measures of rock burst.
【作者單位】： 江西理工大學(xué)省礦業(yè)工程重點(diǎn)實驗室;
【基金】：江西省研究生創(chuàng)新專項資金項目(YC2014-S350)
【分類號】：TD315

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本文編號：1881405