The Study On Application Of High-density Resistivity Method On The Survey Of Structural Of Slope Rock Mass

The structural characteristics of the rock mass are the key factors to control the slope instability model.How to effectively identify the structural characteristics of the rock mass inside the slope? In the absence of adit and rich drilling data,geophysical and ground survey is a combination of more effective means.High-density electrical method is an important branch of geophysical methods,with low cost,high precision and high efficiency.It is mainly used to qualitatively explain the underground structures,and there are few studies on quantitative or semi-quantitative interpretation of structural planes and rock structures.In this case,it is very urgent and necessary to establish a set of analysis and evaluation system for the detection of ruptured rock structures based on the high density resistivity method.Based on the study of the electrical characteristics of the structural plane and the electrical characterristics of the rupture degree of the rock mass,this paper takes the qualitative ana lysis and quantitative evaluation of the faulted rock mass in the Maodaling landslide and the overlying rupture rock and the Luanqu hydropower station in the Lancang River.Combined with the basic academic thinking,established a more complete broken rock structure detection technology method system.The main findings are as follows:(1)Established a set of high-density electrical detection method system suitable for a certain scale of the ?,? structural plane.Through the numerical calculation,the relationship between the main parameters of the structural plane and the anomalies of the high density resistors is studied systematically.A quantitateive identification method of structural plane features based on high density resistivity section is proposed.(2)Based on the site test method,a well established qualitative discriminant system of goaf based on high density resistivity method is established.The results show that the anomalous characteristics of the goaf in the high density section are studied,and the qualitative criterion of the goaf is established.(3)Based on the influence factors of resistivity of rock mass and the analysis of engineering geological conditions,the "rupture degree index" ?? of rupture degree of ruptured rock mass is established.According to the different engineering geological conditions of the ruptured rock mass,the formulas of the "rupture degree index" are deduced under the three assumptions of the rock mass—above the water level,the rock mass below the water level and the clayey rock mass—for quantitative evaluation.(4)Based on the above research results,a well established method of detecting the structure of ruptured rock mass based on high density resistivity method is established,and the detection method and implementation steps are systematically expoundded.The high density resistivity method is the basic means of collecting data in rock mass structure detection,the quantitative identification method of rock mass structure surface parameters,the qualitative discrimination criterion of goaf area and the index of rock fracture degree are the basis of rock mass structure exploration.The establishment of the body structure detection method is the core,the three together for an organic system,constitute a high density resistivity method based on the detection of broken rock structure technology system.(5)A detailed study is made on the detection method of the ruptured rock mass based on the high density resistivity method,taking the Mada hill landslide and the overlying rupture rock mass of the galf and the Miaowei hydropower station.Through the practical application,the actual effect of the detection method and the actual state of the evaluation index are studied,and the quantitative criteria are assigned according to the evaluation index.On this basis,the research area of the ruptured rock mass based on the high density resistivity method combined with qualitative analysis and quantitative evaluation is used to detect the research area,and the detection result is consistent with the actual situation.