摘要
以河曲露天矿为工程背景,分析了不同追踪距离下端帮边坡位移云图、最大剪切应变增量云图,以及内排压脚不同追踪距离下端帮边坡稳定性变化。研究结果表明:不同内排压脚追踪距离下,端帮边坡形成了不同面积的危险区域以及沉降区域;随着内排压脚追踪距离的不断减小,端帮边坡危险区域及沉降区域逐渐向工作帮迁移,靠近端帮边坡内排土场及坑底形成底鼓区域,端帮边坡滑移形态近似呈"凸"字形;内排追踪距离与端帮边坡稳定性系数之间服从Boltzmann函数关系式,当追踪距离由150 m减小到100 m时,端帮边坡稳定性系数发生了断崖式变化;合理的内排压脚追踪距离不仅能够提高端帮边坡的稳定性,同时也能够提高矿山的经济效益,采用内排压脚措施来提高端帮边坡稳定性,也不失为一种既合适又经济的方法。
Based on the engineering background of Hequ Open-pit Mine, this paper analyzes the bottom slope displacement cloud map, the maximum shear strain increment cloud image at different tracking distances, and the different pressure feet in Hequ Open-pit Mine. The slope stability changes at the lower end of the tracking distance. The research results show that under different tracking distances of the inner row presser foot, the end side slope forms different areas of dangerous areas and settlement areas. With the continuous reduction of the inner row presser foot tracking distance, the end side slope danger area and settlement area gradually migrate to the working side, close to the dumping yard and the bottom of the end side slope to form a bottom drum area, the end side slope sliding form is approximately “convex”;the inner row tracking distance and the end side slope stability coefficient obey the Boltzmann function relation. When the tracking distance is reduced from 150 m to 100 m, the stability coefficient of the end slope has a cliff-like change. Therefore, a reasonable tracking distance of the inner row presser foot can not only improve the stability of the side slope, but also improve the economic benefits of the mine. The use of the inner row presser foot measure to improve the stability of the end side slope is also a kind of both appropriate and economical method.
作者
罗科
刘震
张宇
LUO Ke;LIU Zhen;ZHANG Yu(Shanxi Coal Import and Export Group Hequ Jiuxian Opencast Coal Industry Co.,Ltd.,Hequ 036500,China)
出处
《煤矿安全》
CAS
北大核心
2022年第2期234-240,共7页
Safety in Coal Mines
