【摘要】：為了保證礦山安全高效的回采,采用理論研究與數(shù)值模擬手段,將膏體假頂力學(xué)模型簡(jiǎn)化為簡(jiǎn)支"梁"模型,揭示了膏體假頂強(qiáng)度與膏體假頂厚度及經(jīng)濟(jì)配筋率的變化規(guī)律,研究表明,膏體假頂?shù)臉O限強(qiáng)度隨著膏體假頂厚度的增大呈多項(xiàng)式降低,經(jīng)濟(jì)配筋率隨膏體假頂強(qiáng)度增加呈對(duì)數(shù)增加。結(jié)合新疆某銅礦工程實(shí)際情況,并通過(guò)數(shù)值模擬技術(shù),設(shè)計(jì)鋸齒形膏體假頂,確定膏體假頂厚度為3 m,強(qiáng)度為6.78 MPa,經(jīng)濟(jì)配筋率為0.6%,縱筋選擇12φ14@250布置。結(jié)果表明,膏體假頂在自重及上部充填體作用下,膏體假頂可以保證正常的工作,從而很好地驗(yàn)證了膏體假頂力學(xué)模型的可靠性。該研究成果對(duì)膏體假頂設(shè)計(jì)具有重要的指導(dǎo)意義。
[Abstract]:In order to ensure the safety and efficiency of mining, the mechanical model of paste false roof is simplified into a simply supported "beam" model by means of theoretical research and numerical simulation, and the variation law of the strength, thickness and economic reinforcement ratio of paste false top is revealed. The results show that the ultimate strength of the paste roof decreases with the increase of the thickness of the paste false top, and the economic reinforcement ratio increases with the increase of the paste false top strength. Combined with the actual situation of a copper mine project in Xinjiang, and through numerical simulation technology, the jagged paste false roof is designed. The thickness of paste false top is 3 m, the strength is 6.78 MPa, the economic reinforcement ratio is 0.6 and the longitudinal reinforcement is 12 蠁 14250-arranged. The results show that under the action of self-weight and upper filling, the paste false roof can ensure the normal operation, thus the reliability of the paste pseudo-roof mechanical model is well verified. The research results are of great significance to the design of plaster roof.
【作者單位】： 北京科技大學(xué)土木與環(huán)境工程學(xué)院;
【基金】：國(guó)家“十二五”科技支撐計(jì)劃課題項(xiàng)目(2012BAB08B02)
【分類(lèi)號(hào)】：TD32;TD862.1

【相似文獻(xiàn)】

相關(guān)期刊論文 前10條

1 方理剛;膏體泵送特性及減阻試驗(yàn)[J];中國(guó)有色金屬學(xué)報(bào);2001年04期

2 周華強(qiáng),侯朝炯,孫希奎,瞿群迪,陳德俊;固體廢物膏體充填不遷村采煤[J];中國(guó)礦業(yè)大學(xué)學(xué)報(bào);2004年02期

3 趙才智,周華強(qiáng),瞿群迪,關(guān)明亮;膏體充填材料力學(xué)性能的初步實(shí)驗(yàn)[J];中國(guó)礦業(yè)大學(xué)學(xué)報(bào);2004年02期

4 趙才智;周華強(qiáng);柏建彪;強(qiáng)輝;;膏體充填材料強(qiáng)度影響因素分析[J];遼寧工程技術(shù)大學(xué)學(xué)報(bào);2006年06期

5 孫e，

本文編號(hào)：2333199