本文選題：巖石力學 + 硬巖　； 參考：《巖石力學與工程學報》2017年10期

【摘要】：針對巷(隧)道巖爆破裂演化及錨桿錨固機制研究的不足,利用自制的真三軸加卸載試驗系統(tǒng)開展具有巖爆傾向性的無錨固和樹脂錨桿錨固長方體硬巖試樣在單面約束情況下的雙軸壓縮對比試驗研究,分析和探討硬巖層爆、層級破裂演化及錨桿錨固機制。結果表明,在無錨固的情況下,硬巖呈現明顯層爆現象,從臨空面到深部,爆裂破斷面的分形維數主要集中在1.3~1.8范圍,隨層序由于破斷面摩擦作用的增強導致其分形維數隨之降低,斷裂形態(tài)隨層序逐漸由張拉斷裂為主導向剪切斷裂為主導過渡,同時各層面均或多或少伴有次生層斷裂;錨桿錨固明顯降低了爆裂層數及范圍,限制了硬巖逐層爆裂;理論分析得出臨空面附近硬巖層爆層數的計算公式;視硬巖層爆部分為層狀巖層,提出層爆控制的錨桿組合梁理論;臨空面附近以劈裂為主的層爆是受壓致拉的結果,通過錨桿錨固顯著提高了完整巖體的抗拉強度,使層爆層數及范圍大為降低甚至不發(fā)生層爆。
[Abstract]:In order to solve the problem of rock burst evolution and anchoring mechanism of roadway (tunnel) tunnel, The self-made true triaxial loading and unloading test system is used to study the uniaxial compression test of unanchored and resin anchoring cuboidal hard rock samples with rockburst tendency, and to analyze and discuss the hard rock layer explosion. Hierarchical fracture evolution and anchoring mechanism. The results show that in the absence of Anchorage, the hard rock shows obvious laminar explosion phenomenon, and the fractal dimension of burst fracture section is mainly in the range of 1.31.8from the face of the air to the deep. The fractal dimension of the sequence decreases as a result of the enhancement of the frictional action of fracture section, and the fracture morphology gradually changes from tensile fracture to shearing fault with sequence, and each layer is accompanied by secondary fault more or less. The bolt anchoring can obviously reduce the number and range of burst layer and limit the burst of hard rock layer by layer. The formula for calculating the number of burst layers of hard rock layer near the face of the air is obtained by theoretical analysis, and the explosive part of hard rock layer is regarded as layered rock layer, This paper puts forward the theory of composite beam controlled by laminar explosion, and the laminated blasting near the empty surface is the result of compressive tension, and the tensile strength of the whole rock mass is improved obviously by anchoring the bolt, and the tensile strength of the whole rock mass is greatly improved by the laminated blasting near the empty surface. The number and range of laminated explosive layer are greatly reduced, even no laminated explosion occurs.
【作者單位】： 山東理工大學資源與環(huán)境工程學院;山東理工大學礦山工程技術研究所;
【基金】：山東省自然科學基金資助項目(ZR2015EL016) 山東理工大學青年教師發(fā)展支持計劃經費資助;山東理工大學一級學科重點支持計劃~~
【分類號】：TU45

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本文編號：1965944