急斜工作面支架稳定性分析
投稿时间:2013-12-07  修订日期:2014-05-29  点此下载全文
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作者单位E-mail
马淑胤 安徽理工大学 煤矿安全高效开采省部共建教育部重点实验室 402362325@qq.com 
基金项目:国家自然科学(51274008)
中文摘要:随着急倾斜工作面采矿活动的进行,工作面在倾斜方向会产生底板破坏滑移。根据倾斜砌体结构理论,支架在倾向正压状态下,以及受到底板滑移破坏作用会发生失稳。为了研究该种失稳方式,借助边坡失稳问题分析方法,求出底板安全系数F。在安全系数 情况下,分析工作面支架在倾向正压以及底板破坏滑移共同作用下的失稳模式。得出支架滑移和顺向倾倒两种失稳模式。采用数值模拟分析急倾斜工作面底板破坏滑移区域,发现底板应力主要集中在工作面中上部,并且当倾角越大,工作面底板破坏越严重。研究结果表明,工作面中上部是支架在倾向正压及底板滑移共同作用下发生失稳的高发区。
中文关键词:急倾斜煤层  底板破坏  工作面支架  数值模拟
 
An inclined seam analysis of the stability of working face support
Abstract:As the steeply inclined working face mining activities, slipping of the coal face in inclined direction can produce floor damage. According to the theory of inclined masonry structure, support in the tendency of positive pressure condition, and the function of the bottom slip damage happens instability. In order to research this kind of buckling mode, with the aid of instability of slope analysis method, and the floor safety factor F. In the safety factor F < 1 case, analysis of working face support in the tendency of positive pressure and sliding instability under the action of destruction of the base plate model. Scaffold slippage and consequent dumping two buckling mode. The numerical simulation analysis of steep damage sliding floor area, found that stress mainly concentrated in the face of the upper floor, and when the dip Angle, the greater the face slab destruction more serious. The research results show that in the working face is the upper bracket in the tendency of positive pressure and bottom slip joint instability occurred under the action of high incidence.
keywords:steeply inclined mining seam  floor damage  working face support  numerical simulation
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