School of Mining, Liaoning Technical University

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。

In order to reach the target to improve the economic benefit of the surface mine, on the premise to ensure a max mining of the coal under the buildings a nd others, based on the slope stability of the surface as the standard of the slope optimized design, in combination with the Reversed inclined soft rock slope engineeri ng practices at the west end slope of Shengli West No. 2 Surface Mine, with the application of a method combined with the Rigid Body Limit Balance Method and the nu merical simulation software FLAC3 D, with the continuous adjustment of the slope parameters, a study and analysis were conducted on the slope sliding mode and stab ility variation law from the different left coal pillar length to the mine boundary and the optimized design was conducted on the final slope shape at the west end slope of Shengli West No. 2 Surface Mine. The study results showed that the slope stability mode and the stability of the reversed inclined soft rock slope at the west end slope of Shengli West No. 2 Surface Mine were mainly controlled by the weak roof and floor strata. The angle of the stable slope would be firstly reduced then increased with the coal pillar length increased and finally would be in a stable tendency. With the in pit dumping to compress the end slope, the coal at the west end slope under the bu ilding and others could be fully mined, the final slope angle could be increased to 32° and the coal under the building and others were mined out with a quantity of 4.71 4 4 million tons.

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)；