露天煤矿复合煤层边坡空间形态优化

发布时间：2018-02-10 08:58

本文关键词： 复合煤层露天煤矿边坡稳定性时间效应　出处：《煤炭科学技术》2017年06期 　论文类型：期刊论文

【摘要】：针对复合煤层软岩逆倾边坡形态优化问题,以扎哈淖尔露天煤矿北帮边坡为工程背景,基于刚体极限平衡理论,通过横采内排开采方式,从二维边坡稳定性分析角度出发,提出复合煤层边坡逐水平优化方法,确定扎哈淖尔露天煤矿北帮到界边坡参数。应用FLAC~(3D)数值模拟软件分析了优化后的北帮边坡稳定性及滑坡机理。结果表明:受横采内排压帮开采方式产生的时空效应,最终确定扎哈淖尔露天煤矿北帮不同层位边坡稳定系数从上到下依次为1.20、1.10、1.05;逐水平优化后北帮整体边坡角增大至29°,深部陡帮开采边坡角增大至34°,滑坡力学成因机制类型为推动式;边坡岩体的主要破坏形式为拉-剪复合型。
[Abstract]:Aiming at the optimization of soft rock reverse slope in composite coal seam, taking the north slope of Zahannur opencast coal mine as the engineering background, based on the theory of rigid body limit equilibrium, through the method of horizontal mining and internal drainage, this paper analyzes the stability of two-dimensional slope. A horizontal optimization method for composite coal seam slope is proposed. The parameters of the slope from the north side to the boundary in the Zahannaoer opencast coal mine are determined. The stability and the landslide mechanism of the optimized northern slope are analyzed by using the software FLACU 3D. The results show that the space-time effect of the mining method of the North side under the pressure of the horizontal mining is analyzed. Finally, it is determined that the slope stability coefficient of different strata in the north slope of Zahannaoer opencast coal mine is 1.20 ~ 1.101.101.05 from top to bottom, the angle of the whole slope increases to 29 掳after horizontal optimization, the angle of deep steep slope increases to 34 掳, and the mechanical mechanism of landslide is driven. The main failure form of slope rock mass is tension-shear composite type.
【作者单位】：辽宁工程技术大学矿业工程学院;中煤平朔集团有限公司东露天煤矿;
【基金】：国家自然科学基金联合基金资助项目(U1361211) 国家自然科学基金资助项目(51104084)
【分类号】：TD824.7

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