中国科技核心期刊
美国化学文摘社(CAS)数据库
美国EBSCO学术数据库
日本科学技术振兴机构数据库(JST)
卢铀嘉|姜永恒|刘博
Lu Youjia¹, Jiang Yongheng², Liu Bo²
囫囵图矿采用双进路分段空场采矿法进行回采,为保证矿山安全开采,运用 Flac3D软件建立了采场三维数值模型,综合考虑各分段采场的最大主应力、z方向位移和塑性区的变化等,对回采过程中采场稳定性进行了分析。结果表明:随着回采的进行,采场顶板最大主应力、z方向位移及塑性区均逐渐增大,可在最上2个分段回采结束后用废石充填或崩落顶板围岩的方式及时对采空区进行处理,以防止因上部采空区大面积垮塌而形成冲击地压。
To ensure safe mining operations at the Huluntu Mine, which employs a double-approach sublevel open stoping method, this study established a 3D numerical stope model using Flac software. The stability of the stope during mining was analyzed by evaluating variations in maximum principal stress, z-direction displacement, and plastic zonesacross different sublevels. Results indicate that the maximum principal stress, z-direction displacement, and plastic zones in the stope roof progressively increase as mining advances. To prevent rockbursts caused by large-scale collapse of upper goafs, it is recommended to implement waste rock filling or induced roof caving immediately for goaf treat-ment after completing mining in the top 2 sublevels.