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J4 ›› 2012, Vol. 20 ›› Issue (2): 58-61.

• 技术前沿 • 上一篇    下一篇

焦家金矿寺庄矿区岩体节理裂隙调查与矿岩稳定性分析

董金奎1,2,申延3,邱俊刚2   

  1. 1.东北大学资源与土木工程学院,辽宁  沈阳   110819;
    2.山东黄金矿业(莱州)有限公司焦家金矿,山东  莱州   261441;
    3.中南大学资源与安全工程学院,湖南  长沙   410083
  • 收稿日期:2012-01-09 修回日期:2012-03-06 出版日期:2012-04-28 发布日期:2012-08-21
  • 作者简介:董金奎(1964-),男,山东莱州人,高级工程师,从事采矿工程技术研究工作.qiujungang2008@126.com
  • 基金资助:

    山东省经贸委2010年科研资助项目“焦家金矿寺庄矿区机械化高效采矿方法研究”(编号:201020606002)资助.

Investigation of Joint Fissure and Analysis of Ore-rock Stability in Sizhuang Mining of Jiaojia Gold Deposit

DONG Jinkui1,2,SHEN Yan3,QIU Jungang2   

  1. 1.College of Resources and Civil Engineering,Northeastern University,Shenyang   110819,Liaoning,China;
    2.Jiaojia Gold Mine,Shandong Gold Group Co.,Ltd.,Laizhou   261441,Shandong,China;
    3.School of Resources and Safety Engineering,Central South University,Changsha   410083,Hunan,China
  • Received:2012-01-09 Revised:2012-03-06 Online:2012-04-28 Published:2012-08-21

摘要:

通过对焦家金矿寺庄矿区矿岩节理裂隙现场调查,获得上下盘围岩及矿体节理裂隙的产状和平均间距,并对其进行统计分析。采用CSIR岩体质量评判方法,根据节理密度换算计算岩石质量指标RQD,以岩体的完整性系数来表征岩体的强度,通过计算得出RMR值,以不同的RMR值来表征岩体的稳定性,预测出采场跨度及其稳定时间。研究结果表明,上盘围岩节理裂隙较矿体及下盘围岩节理发育,并且当节理角度在30~75°之间时,节理分布对岩体强度影响较大;上盘围岩稳定性较差,矿体和下盘围岩稳定性好;由于寺庄矿区7-2号矿体上盘围岩的稳定性差,揭露后需及时进行有效支护,以限制围岩进一步变形和破坏;中段标高越往下,开采深度越深,矿体和围岩的稳定性降低,进行深部开采时,采场需要及时支护以保证作业安全。该研究结果为矿床开采采场结构参数优化及稳定性分析提供了理论依据,对矿区安全生产有重要指导意义。

关键词: 节理裂隙, 优势结构面, 岩体稳定性, 评价, 寺庄矿区, 焦家金矿

Abstract:

By investigating on the joints and fissure in Sizhuang mining area of Jiaojia gold deposit,the altitude and average spacing of joint fissure of the hanging and footing wall were obtained,and the data were statistically analyzed.Using CSIR rock quality evaluation method,the rock quality index RQD was calculated by the joints density.The rock integrity coefficient was used to represent the strength of rock masses by calculating the RMR whose magnitude could indicate the stability degree of rock masses,and predicted the stope span and their stability time.The results show that more fissures develop in surrounding rock on the plate than in the orebody and footwall surrounding rock, and the rock mass strength is more influenced by the distribution of joints when the joints have angle of 30° to 75°;orebody and footwall of surrounding rock are stable,while surrounding rock on the plate has poor stability.Because of the poor stability of the surrounding rock in No.7-2 orebody,Sizhuang mine area,timely effective support is needed to limit the surrounding rock deformation and failure after exposing;Due to decreasing of surrounding rock with the decreasion of the ground elevation, stope needs timely support to ensure the safety of operations when exposed to deeper ore body.This study can be used as an important reference for optimizing of mining stope structural parameters and analyzing of its stability,and is essential value to safe production.

Key words: Joint fissure, Dominant structural surface, Rock body stability, Evaluation, Sizhuang mine area, Jiaojia gold mine

中图分类号: 

  • TD853.34

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