摘要
磷矿是一种重要的非金属矿产资源,大多数磷矿山采用房柱法开采,该方法回采率低、安全性差,而条带式胶结充填采矿法能极大提高采场的稳定性和矿石回采率,其回采顺序对磷矿安全生产极为重要。基于后坪磷矿采场Ph_(1)^(3)矿层的工程地质条件,提出了4种条带式胶结充填开采方案--一次性开采、间隔开采、隔2采2、隔3采3,建立了基于莫尔-库仑强度准则的弹塑性本构模型,运用PLAXIS 2D软件构建了数值模型,从应力、位移和塑性区等方面对比分析了各开采方案的优劣,结果表明:方案1和方案4的塑性区贯通,模拟计算不收敛,采场失稳;方案3的应力、位移、塑性区面积及其占比均较方案2小,更有利于采场的安全高效开采,故方案3(隔2采2)最优,该成果可为后坪磷矿以及类似矿山的开采方案优化和确定提供参考。
As a significant non-metallic mineral resource, most phosphate mines are amenable to room and pillar mining method with low recovery and poor safety. However stripe cemented filling method is favorable for the remar-kably improved stability of the stope and higher ore recovery. The mining sequence is a critical factor on the safety of phosphate ore mining operation.Based on the engineering geological conditions for Ph_(1)^(3) ore bed in Houping phosphate mine, four options for stripe cemented filling mining method were proposed in this paper, including one-off mining, interval mining, two rooms filling after mining, and three rooms filling after mining. The elastic-plastic constitutive model based on Mohr-Coulomb strength criterion was established, the numerical model was built using PLAXIS 2D software, both the advantages and disadvantages of each optional mining schemes were compared and analyzed in aspects of stress, displacement and plastic zone. The results show that as the plastic zone of scheme 1 and scheme 4 cut-through, simulated calculation exhibited non convergence, stability failure of stope occurred. The stress, displacement, area and ratio of plastic zone of scheme 3 were smaller than scheme 2, which is more conducive to safe and efficient mining.Therefore, scheme 3(two rooms filling after mining) is the optimal, and the results can be provided as a reference for the optimization and determination of mining scheme for Houping phosphate mine even similar mines.
作者
董高一
高鹏
陈景松
孙洋
周春梅
吝曼卿
张卫中
Dong Gaoyi;Gao Peng;Chen Jingsong;Sun Yang;Zhou Chunmei;Lin Manqing;Zhang Weizhong(School of Environment and Civil Engineering,Wuhan Institute of Technology,Wuhan Hubei 430073,China;Hubei Xingfa Chemical Group Co.,Ltd.,Yichang Hubei 443700,China;School of Resources of Safety Engineering,Wuhan Institute of Technology,Wuhan Hubei 430074,China)
出处
《化工矿物与加工》
CAS
2023年第1期13-19,共7页
Industrial Minerals & Processing
基金
国家自然科学基金青年基金项目(52174085,52174086)
武汉工程大学研究生教育创新基金项目(CX2021135)。