露天煤矿端帮逆倾软岩边坡稳定性研究

发布时间：2019-05-18 00:59

【摘要】：为达到提高露天煤矿经济效益的目的,在确保最大限度回采压煤的前提下,以露天煤矿边坡稳定性问题作为边坡优化设计标准,结合胜利西二露天煤矿西端帮逆倾软岩边坡工程实际,采用刚体极限平衡软件和数值模拟软件FLAC3D相结合的方法,通过不断调整边坡参数,研究分析了不同留设煤柱长度到界边坡滑移模式及稳定性变化规律,优化设计了胜利西二露天煤矿西端帮最终边坡形态。研究结果表明:胜利西二露天煤矿西端帮逆倾软岩边坡滑移模式及稳定性主要受煤顶底板弱层控制;其稳定边坡角随着煤柱长度的增加呈先减小再增加最后趋于稳定的趋势;采用内排压帮可将西端帮压煤全部采出,最终帮坡角提高至32°,采出压煤471.44万t。
[Abstract]:In order to improve the economic benefit of opencast coal mine, the slope stability of opencast coal mine is taken as the optimal design standard under the premise of ensuring the maximum mining and compression coal. Combined with the engineering practice of reverse inclined soft rock slope at the west end of Shengli West No.2 opencast coal mine, the rigid body limit equilibrium software and numerical simulation software FLAC3D are used to adjust the slope parameters continuously. The slip mode and stability variation law from the length of coal pillar to the boundary slope are studied and analyzed, and the final slope shape of the western tip of Shengli West No.2 opencast coal mine is optimized. The results show that the slip mode and stability of the soft rock slope at the west end of Shengli West No.2 opencast coal mine are mainly controlled by the weak layer of the top and floor of the coal, and the stable slope angle decreases at first and then tends to be stable with the increase of the length of the coal pillar. The western end coal can be fully extracted by using the internal drainage pressure gang, and the slope angle can be increased to 32 掳, and the coal compression coal can be produced by 4.7144 million t.
【作者单位】：辽宁工程技术大学矿业学院;
【基金】：国家自然科学基金资助项目(51104084,51474119);国家自然科学基金煤炭联合基金资助项目(U1361211) 高等学校博士学科点专项基金资助项目(20122121110003)
【分类号】：TD824.7

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