托库孜巴依金矿地表沉降与控制数值模拟研究

Numerical simulation study on ground subsidence and its control in Tuokuzibayi Gold Mine

托库孜巴依金矿设计采用浅孔留矿采矿法进行开采,现已开采3个中段。为了保障矿山安全生产,采用数值模拟方法对矿体和围岩进行建模,依据现行的采矿方法对模型进行模拟开采分析,研究地表沉降状况与沉降规律。介绍了矿体计算模型的建立及模拟过程,经计算得出位于模型地表中部的最大沉降值有可能达到140 cm;根据地表沉降模拟结果提出控制地表沉降的措施,建议对已经开采的530 m、490 m和450 m中段的采空区进行全尾砂充填,而从410 m中段开始采用胶结尾砂充填采矿法开采,这样模拟得出地表最大沉降值可能减小到24 cm左右。研究结论有利于矿山深部开采的安全和经济效益。

Tuokuzibayi Gold Mine is designed to use shrinkage mining method to exploit, and 3 stages have been developed. In order to guarantee safety mining, numerical simulation methods are used to model the ore body and surrounding rocks, and the model is analyzed based on current mining methods to Study the surface subsidence regularity. The paper introduces the process of the establishment of ore body calculation and simulation. The maximum settlement value of the ground surfa paper proposes measures advised to be backfilled ce is likely to reach 140 cm in the center of the model. According to the simulation results, the to control the surface subsidence. The mined-out area stages of 530 m,490 m and 450 m are with tailings, and the cemented sand backfilling mining method is taken from the 410 m stage on. Afterward calculation shows that the maximum settlement value may be reduced to 24 cm. Research conclusion is conductive to the safety in deep mines and economic profits.