普朗铜矿地应力测量及其结果分析

Pulang Copper Miner In-situ Stress Measurements and Its Results Analysis

普朗铜矿拟采用自然崩落法进行开采,在使用此方法之前要研究矿岩的可崩性、崩落规律等。矿区地应力数据是评价矿岩可崩性、研究崩落规律和井巷工程设计的主要依据。为此在普朗铜矿首采区的3720m和3540 m水平进行了系统的地应力测量,现场测量采用孔壁应变解除法,共获得了6个测点的三维应力数据。测量结果表明,地应力以水平构造应力为主导,最大主应力值介于11.60--17.69MPa之间,属于中等地压范围。

Pulang Copper miner is prepare to mine the orebody using nature caving method.Before using the method,the ore rock cavability,caving law,etc.must to be study.The in-situ stress data of mining is the main basis for ore cavability evaluation,caving law research,mine working engineering design.System in-situ stress measurements has been to do in the 3720m and 3540m levels of Pulang copper miner firstly mining area.Field measurements use the hole wall strain release method,and the three dimensional stress data of six points is received.Measurement results show that in-situ stress is dominated by horizontal tectonic stress,and the maximum main stress value is between 11.60MPa to 17.69MPa,belonged to the medium pressure range.