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反射波等时圆在岩体节理反演中的应用

Reflected Wave Isotraveling Time Circle and Its Application in Inverting Jointed Rock Masses

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【作者】 许年春林军志吴德伦

【Author】 XU Nian-chun1,2,LIN Jun-zhi3,WU De-lun2(1.Chongqing University of Science & Technology,Chongqing 400042,P. R.China;2.Chongqing University,Chongqing 400045,P.R.China;3.Chongqing Jiaotong University,Chongqing 400074,P.R.China)

【机构】 重庆科技学院建筑工程学院重庆交通大学河海工程学院重庆大学土木工程学院 重庆400042重庆大学土木工程学院重庆400045重庆400074

【摘要】 节理对岩体工程有重要的影响,采用应力波反演节理产状有重要的工程意义。从振源点发出的应力波经节理面反射后返回地面,利用解析几何理论,根据点、线、面的相互关系,经过严密推导,得出该反射波走时公式,该公式建立了节理真倾向、真倾角值与地面测点走时的直接关系,描述出的地面反射波等时圆概念清晰、明确。实测时,绕发射点环形布置测点,利用MATLAB平台上编写的程序,搜寻出等时圆圆心后,再结合任一测点走时即可反演节理产状。

【Abstract】 Joints are crucial factors in rock masses engineering,so using stress waves to invert joint attitude is a valuable practice.The stress wave emitted from a vibration source is reflected by joints and returns to the ground.A formula to calculate the reflected wave travel time was deduced using analytic geometry theory.In the formula,a direct relationship was established between a joint’s real dip angle,real dip direction and the travel time at test spots on the ground.The reflected wave’s isotravel time circle described by the formula has a clear conception and a definite meaning.Using the program on the MATLAB platform,this formula can be applied to invert the joint attitude by searching the center of the circle based on the measured travel time at the testing spots around the wave source.

  • 【文献出处】 重庆建筑大学学报 ,Journal of Chongqing Jianzhu University , 编辑部邮箱 ,2008年03期
  • 【分类号】TU452
  • 【下载频次】45
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