本文關(guān)鍵詞： 橫向簡諧荷載 錨桿固有頻率 粘結(jié)性衰減 均勻試驗(yàn)設(shè)計(jì) 極限錨固力　出處：《遼寧工程技術(shù)大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：目前錨桿已廣泛應(yīng)用于煤礦支護(hù)工程中,由于采動(dòng)荷載和爆破荷載對(duì)已有支護(hù)錨桿產(chǎn)生影響,因此迫切需要研究錨桿在動(dòng)荷載作用下的微觀力學(xué)特性及粘結(jié)性變化。本文從工程實(shí)際出發(fā),現(xiàn)場監(jiān)測錨桿工作狀態(tài)下軸力變化和爆破荷載過程中錨桿周邊圍巖振動(dòng)信息,并開展探索性室內(nèi)試驗(yàn)輔以數(shù)值仿真分析。工程監(jiān)測結(jié)果表明,錨桿軸力隨著齡期逐漸增加后基本穩(wěn)定,穩(wěn)定后錨桿軸向受力約為設(shè)計(jì)錨固力的三分之一。爆破荷載作用下錨桿周邊圍巖三向均有振動(dòng)跡象。室內(nèi)試驗(yàn)研究結(jié)果表明,錨桿在工作狀態(tài)下受到振動(dòng)頻率為40Hz的橫向簡諧荷載作用時(shí)錨桿粘結(jié)性衰減最快；同時(shí)得到40Hz20s橫向振動(dòng)荷載作用下錨桿粘結(jié)力變化率、振動(dòng)強(qiáng)度和時(shí)間三者關(guān)系式,可對(duì)不同齡期不同振動(dòng)荷載對(duì)粘結(jié)力產(chǎn)生影響進(jìn)行預(yù)測。振動(dòng)強(qiáng)度與養(yǎng)護(hù)齡期兩個(gè)因素對(duì)新裝錨桿粘結(jié)性衰減均產(chǎn)生影響,其中養(yǎng)護(hù)齡期的敏感性強(qiáng)于振動(dòng)強(qiáng)度的敏感性。通過橫向簡諧荷載振動(dòng)作用下拉拔試驗(yàn)可知,端錨粘結(jié)式錨桿的剪應(yīng)力分布具有可傳遞性,錨桿的剪切應(yīng)力峰值出現(xiàn)在錨桿錨固段的四分之一和四分之三處。對(duì)錨桿體的直徑和長度進(jìn)行敏感性分析,可得到錨桿長度敏感性強(qiáng)于錨桿尺寸敏感性。運(yùn)用FLAC3D模擬軟件采用室內(nèi)試驗(yàn)參數(shù)進(jìn)行模擬,其結(jié)果與室內(nèi)試驗(yàn)結(jié)果基本吻合,同時(shí)得到拉拔破壞過程中塑性區(qū)的發(fā)展情況。
[Abstract]:At present, anchor rod has been widely used in coal mine support engineering, because of the influence of mining load and blasting load on the existing supporting bolt, Therefore, there is an urgent need to study the micromechanical characteristics and bond properties of the bolt under dynamic load. Based on the engineering practice, this paper monitors the variation of axial force in the working state of the bolt and the vibration information of surrounding rock around the bolt during blasting load. The results of engineering monitoring show that the axial force of anchor rod is stable with the increase of age. The axial force of the anchor rod after stabilization is about 1/3 of the designed anchoring force. There are vibration signs in the surrounding rock around the bolt under blasting load. When the anchor rod is subjected to the vibration frequency of 40 Hz transverse harmonic load, the bond attenuation of the anchor rod is the fastest, and the relationship among the change rate of the bolt bond force, the vibration intensity and the time under the action of 40 Hz transverse vibration load is obtained. The influence of different age and different vibration load on bond force can be predicted. Both vibration strength and curing age have influence on the bond attenuation of new anchor. The sensitivity of curing age is stronger than that of vibration strength. The shear stress distribution of end anchor bonded anchor is transmissible by drawing test under transverse harmonic load. The peak shear stress of the bolt appears at 1/4 and 3/4 of the anchoring section. The sensitivity analysis of the diameter and length of the anchor body is carried out. The length sensitivity of anchor rod is stronger than the sensitivity of bolt size. The results of FLAC3D simulation software are simulated by indoor test parameters, and the results are in good agreement with the results of indoor test, and the development of plastic zone during pullout failure is obtained.
【學(xué)位授予單位】：遼寧工程技術(shù)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TU476

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 崔千里;林健;;樹脂錨桿錨固特性數(shù)值模擬研究[J];煤炭工程;2013年S1期

2 李強(qiáng);宿鐘鳴;;拉拔荷載下黃土隧道系統(tǒng)錨桿力學(xué)特性分析[J];重慶交通大學(xué)學(xué)報(bào)(自然科學(xué)版);2013年04期

3 孟超;李學(xué)華;;沿空掘巷錨桿支護(hù)參數(shù)敏感性分析與應(yīng)用[J];中國煤炭;2013年03期

4 賈金青;涂兵雄;王海濤;孟剛;姚大立;;壓力分散型預(yù)應(yīng)力錨桿的力學(xué)機(jī)理研究[J];巖土工程學(xué)報(bào);2011年09期

5 李術(shù)才;張寧;呂愛鐘;李明田;楊磊;;單軸拉伸條件下斷續(xù)節(jié)理巖體錨固效應(yīng)試驗(yàn)研究[J];巖石力學(xué)與工程學(xué)報(bào);2011年08期

6 龐宗霞;田利民;;水泥—水玻璃漿液的室內(nèi)試驗(yàn)與研究[J];山西交通科技;2010年05期

7 舒谷生;彭文祥;何忠明;;全長粘結(jié)式錨桿拉拔試驗(yàn)的數(shù)值實(shí)現(xiàn)[J];科技導(dǎo)報(bào);2009年12期

8 王光勇;張素華;謝文強(qiáng);萬曉東;;錨桿動(dòng)載響應(yīng)和軸向應(yīng)力分布規(guī)律數(shù)值分析[J];采礦與安全工程學(xué)報(bào);2009年01期

9 楊為民;李燕粉;張偉;;全長粘結(jié)式砂漿錨桿的力學(xué)特性數(shù)值分析[J];河南科技大學(xué)學(xué)報(bào)(自然科學(xué)版);2008年03期

10 邵丹;周業(yè)明;;回歸常數(shù)的顯著性檢驗(yàn)[J];科學(xué)技術(shù)與工程;2007年08期

相關(guān)碩士學(xué)位論文 前1條

1 曾鼎華;橫向沖擊荷載作用下錨桿錨固系統(tǒng)的動(dòng)力響應(yīng)研究[D];重慶大學(xué);2005年

，

本文編號(hào)：1548201