在软岩中测量地应力传感器与围岩的相互作用
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摘要
讨论了传感器引起的钻孔变形随时间的变化,最后推出了由测值反算地应力的公式,此方法称为流变法应力测量.通过实测数据,利用非线性最小二乘法求得原岩应力,流变法应力测量与孔壁应变法应力测量在应力大小和应力方向基本保持一致.
It is very difficult to obtain the cylinder core that fits to the requirement of strata stress measure in the rheological rock mass,so it is very difficult to use the method of stress relief.New method based on the rheological of rock does not need the core samples obtained with coring bit.It is called method of boring deformation.When measuring strata stress,the rigidity of sensor can not be ignored comparing to the rock mass,the boring deformation with time is determined by strata stress as well as the contact between sensor an boring.The paper discusses the boring deformation with time caused by sensor,and finally derives the formula of strata stress that can be calculate through the measured value.Through the data of actual measurement,using method ofnonlinear least squares,get rock stress,flow out the stressmeasure of political reform with the strain law stress measureof hole wall in stress size and stress direction basic maintenanceconsistent.
It is very difficult to obtain the cylinder core that fits to the requirement of strata stress measure in the rheological rock mass,so it is very difficult to use the method of stress relief.New method based on the rheological of rock does not need the core samples obtained with coring bit.It is called method of boring deformation.When measuring strata stress,the rigidity of sensor can not be ignored comparing to the rock mass,the boring deformation with time is determined by strata stress as well as the contact between sensor an boring.The paper discusses the boring deformation with time caused by sensor,and finally derives the formula of strata stress that can be calculate through the measured value.Through the data of actual measurement,using method ofnonlinear least squares,get rock stress,flow out the stressmeasure of political reform with the strain law stress measureof hole wall in stress size and stress direction basic maintenanceconsistent.
引文
[1]张超.地应力测量的原理与应用[M].北京:地质出版社,1981.
[2]尹祥础.固体力学[M].北京:地震出版社,1985.
[3]陈子荫.由位移测定值反算流变岩体变形性质参数及地应力[J].煤炭学报,1985,10(4):26-27.
[4]徐曾和,李国臻.龙凤矿-625水平地应力测量[J].阜新矿业学院学报,1985,7(6):42-45.
[5]张兆平,李国臻.北京房山矿应力场初步研究[J].阜新矿业学院学报,1988,10(2):33-38.
[2]尹祥础.固体力学[M].北京:地震出版社,1985.
[3]陈子荫.由位移测定值反算流变岩体变形性质参数及地应力[J].煤炭学报,1985,10(4):26-27.
[4]徐曾和,李国臻.龙凤矿-625水平地应力测量[J].阜新矿业学院学报,1985,7(6):42-45.
[5]张兆平,李国臻.北京房山矿应力场初步研究[J].阜新矿业学院学报,1988,10(2):33-38.
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