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无底柱分段崩落法巷道稳固性研究 被引量:2

Study on Tunnel Stability in Nonpillar Sublevel Caving
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摘要 从现场宏观调查入手 ,进行了试验室矿岩力学性质测定 ,现场点荷载试验研究和数值模拟研究 ,从采场地压控制和巷道合理支护两个方面 ,对弓长岭井下铁矿 - 1 6 0m东区无底柱分段崩落法巷道稳固性问题进行了研究。研究结果表明 ,平行回采下分段应力较小 ,滞后回采 ,残留矿柱都将增大下分段应力 ,对此采用了集中作业 ,强化开采 。 Starting from the in-situ macro investigation and by laboratory testing of the mechanical properties of ore rock,in-situ point load test and numerical simulation study,the study on the stability of the tunnel in -160 m east area of Gongchangling's underground mine in nonpillar sublevel caving was made from the aspects of the ground pressure of the stope and the rational support of the tunnel. The research results showed that parallel extraction caused a smaller stress on the next level while in delayed mining the residual ore pillar could increase the stress on the next level. Therefore, measures were taken, such as concentrated operation, intensified mining, utilization of a rational extraction sequence and strengthening.
出处 《金属矿山》 CAS 北大核心 2003年第11期8-9,12,共3页 Metal Mine
关键词 无底柱分段崩落法 数值模拟 巷道稳固性 维护 铁矿 Nonpillar sublevel caving,Numerical simulation,Tunnel stability,Maintenance
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