Analysis And Application Of Detection Effect Of High-density Resistivity Detection Device

In recent years,the high density resistivity is used more and more broadly.It is a kind of exploration method has the same basic principles that based on different conductivity of rock with traditional resistivity.It is studied on distribution of current conduction in electric field.Electrical prospecting is based on the difference between the electrical properties of rock and mineral.It is a class of geophysical methods to identify the underground geological structure and the search for underground electrical heterogeneity(Karst,weathering layer,landslide,etc.)through observation and research related to these differences in the electric field and the electromagnetic field in space or time on the distribution and variation.High density resistivity method,also known as "high density electrical",it is developed in middle 1980 s and getting more and more attention in geological field in recent years.The greatest strength high density electrical is that it improves efficiency,reduces labor intensity,reflecting the large amount of ground Information compared with the traditional electrical methods.After 20 years of development,the high density electrical method in equipment,software,methods and applications,has achieved remarkable results.High density electrical with high degree of automation,high efficiency,the advantages of visually abnormal compared with other detection methods,it has been widely used and have achieved good results in the field of the metal and nonmetal mineral resources,engineering geological investigation,geological hazard survey,a large karst and the detection of mined areas,and many other areas of archaeological.However a lot of problems and deficiencies has been found when using high density resistivity method during the field work.Such as field work methods are not standardized,interpretation of the system is not perfect,not easy to exclude interfering factors,low resolution,image display and the actual location of the target groups have greater excursion and so on.In order to improve the high density resistivity exploration technology and its application effect,theseproblems must be solved.This paper focus from the point of practical application in mine the detection,to simulate real work situations encountered by forward modeling software to build models of mined areas in a variety of practical method of selecting the acquisition parameters and the anti-inversion modeling process software in order to provide an effective theoretical for future work.First,the optional parameters are: device type,the polar distance,using the total number of electrodes,isolation factor,power supply mode in the collection process.The distance between electrode number and isolation coefficient is the specific response to the scope of the size of the collection;Power mode selection is based on the different selected collection instruments which can be reasonably set.This article highlights the detection device selection of high density resistivity method,first numerical forward modeling analysis,and then forward through the inversion software to interpret the model(the selected algorithm is the least square method)in order to select the appropriate device for detecting the collected data mining area.There are many types of devices of high density resistivity method are many types of devices,this article focuses on the device types are:Winner device,dipole device,a unilateral three-pole device(two).According to the results of the simulation test,the goaf detection is carried out in the working area of Huolinguole Industrial Park by using the high-density resistivity method as the main geophysical method.Based on the results of geological information and geophysical survey,the anomaly types are inferred and the goaf and fault structures are divided.