摘要
在矿产资源开发过程中,确保矿石安全高效开采至关重要,而巷道围岩稳定性分析是确保安全开采的关键。聚焦多宝山铜矿不稳固巷道,针对岩爆倾向性和围岩楔形体2个因素展开研究。通过现场工程地质调查,综合运用人工测量法与三维激光数字测量法,对特定区域进行岩体结构面产状测量,获取了节理裂隙的详细信息。经室内岩石力学试验获得了矿岩的各项物理力学参数,采用弹性能量法和脆性系数法判定其岩爆倾向性较弱或无。采用Q系统分级、RMR分级和GSI这3种方法,对其岩体质量进行评估,确定其围岩为中等稳固。利用Unwedge分析巷道楔形体的稳定性,发现不同区域楔形体形态、尺寸各异,其稳定性受节理裂隙分布、岩体物理力学性质、地应力等多因素影响,部分楔形体需进行加固处理。研究表明:多宝山铜矿地质条件复杂,开采中应充分考虑各因素对岩体稳定性的影响,采取加固、监测及定期评估等工程措施,以保障矿山安全生产。
In mineral resource exploitation,ensuring mine safety is of paramount importance.Rock mass stability and hidden disaster-causing factors in roadways are key aspects.This paper centers on the Duobaoshan Copper Mine and conducts indepth research on rockburst propensity and surrounding rock wedge bodies.Through on-site engineering geological investigations employing artificial measurement methods and three-dimensional laser digital measurement techniques,the occurrence of rock mass structural planes in specific areas is measured,and information such as joint fractures is obtained.Regarding the evaluation of rockburst propensity,through indoor rock mechanics tests,the physical and mechanical parameters of ore and rock are acquired.The elastic energy method and brittleness coefficient method are utilized to determine that the rockburst propensity is weak or nonexistent.For rock mass quality evaluation,three methods,namely Q system classification,RMR classification,and GSI,are employed to determine that it is moderately stable.By using the Unwedge software to analyze the stability of wedge bodies,it is found that the shapes and sizes of wedge bodies in different regions are diverse.Their stability is influenced by multiple factors such as the distribution of joint fractures,the physical and mechanical properties of rock masses,and in-situ stress,and wedge bodies require reinforcement.The study results show that:the geological conditions of the Duobaoshan Copper Mine are complex.In mining operations,the influence of various factors on rock mass stability should be fully considered.Engineering measures such as reinforcement,monitoring,and regular assessment should be implemented to guarantee safety production in the mine.
作者
王建华
高永
秦绍龙
曹学文
赵兴东
WANG Jianhua;GAO Yong;QIN Shaolong;CAO Xuewen;ZHAO Xingdong(Heilongjiang Duobaoshan Copper Co.,Ltd.,Heihe 161400,China;Key Laboratory of Ground Control Management Plan in Deep Metal Mines,National Mine Safety Administration,Shenyang 110819,China;School of Resources and Civil Engineering,Northeastern University,Shenyang 110819,China)
出处
《金属矿山》
CAS
北大核心
2024年第11期37-44,共8页
Metal Mine
基金
国家自然科学基金重点项目(编号:52130403)
教育部基本科研业务费重大需求项目(编号:N2301027)。
关键词
围岩稳定性
工程地质调查
岩爆倾向性
岩体质量分级
楔形体识别
stability of surrounding rock
engineering geological investigation
rockburst propensity
rock mass quality classification
wedge identification
