眼前山铁矿岩体完整性评价方法
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摘要
在岩石工程领域主要采用RQD对岩体完整性进行描述,而RQD受机械扰动等因素的影响,其可信性较低。钻孔摄像技术作为最新的一项技术,可通过观测钻孔岩壁直接对岩体进行原位观测,准确判定原生节理面的产状、填充性等情况,同时结合岩体完整性的指标RMDI可更合理的对岩体完整性进行评价。结合眼前山铁矿分别采用上述两个指标进行了评价,通过对比发现RQD在深部钻孔时存在极大的误差,难以准确判断岩体的完整性。
In the field of rock engineering,RQD is the main method which is used to describe the integrity of rock mass.However,RQD is affected by the mechanical disturance and other factors,the credibility is low.Borehole camera technology as a new technology,it'scan directly through the observation borehole wall directly in situ observation of rock mass,accurate determination of the occurrence and filling of the primary joint surface,combined with the RMDI which is aindex of rock mass integrity can be performed on rock mass integrity evaluation more reasonable.In this paper,the above two indicators were evaluated of theYanqianshaniron ore,by comparison,it is found that there is a great error in the deep drilling of the RQD,it is difficult to judge the rock mass integrity.
In the field of rock engineering,RQD is the main method which is used to describe the integrity of rock mass.However,RQD is affected by the mechanical disturance and other factors,the credibility is low.Borehole camera technology as a new technology,it'scan directly through the observation borehole wall directly in situ observation of rock mass,accurate determination of the occurrence and filling of the primary joint surface,combined with the RMDI which is aindex of rock mass integrity can be performed on rock mass integrity evaluation more reasonable.In this paper,the above two indicators were evaluated of theYanqianshaniron ore,by comparison,it is found that there is a great error in the deep drilling of the RQD,it is difficult to judge the rock mass integrity.
引文
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