Study And Application Of Comprehensive Survey Technology In Goaf Of Xingdong Coal Mine

The GOAF of coal mine has bad geological influence on engineering construction project,The location of mined-out area should be accurately determined by effective exploration method,And take appropriate control measures,In order to reduce the danger of GOAF.In the process of building high-speed,railway and highway,the underground GOAF has become an important hidden danger of geological hazards in the design and construction.The survey of mined-out area needs many kinds of technical methods to explain each other.The result of each technical method is only a necessary condition,not a sufficient condition for deducing the characteristics of mined-out area.The exploration of the mined-out area needs to coordinate every exploration technique such as Geological Survey,geophysics exploration,surface deformation monitoring,drilling and so on.The results of each exploration technique should be mutually verified to form a complete technical chain,the characteristics of goaf inferred by this method are more true and reliable,and the basic information provided for planning and construction is more accurate and reliable.Based on the preliminary investigation of geotechnical engineering of central ecology(comprehensive treatment of coal mining subsidence area)in Xingdong new district,Xingtai,and combined with the engineering geological conditions of the mining area,this paper adopts the methods of comprehensive geophysical prospecting technology,drilling technology and study on the law of surface deformation and deformation,the main contents of the study are as follows:1.The integrated geophysical prospecting technique,CSAMT(Controlled Source Audio Magnetotelluric Method)is one of the more effective and important geophysical exploration methods for goaf exploration.It is one of the more effective geophysical methods for goaf exploration under complex environmental conditions.2.Verified by drilling,according to the core observation and description adopted by ZK1 goaf engineering drilling verification hole,indoor rock physical and mechanical tests and comprehensive logging data,the distribution of "three zones" is determined,and the required rock electrical parameters are provided for geophysical exploration.3.The suty of deformation of ground surface,based on the analysis of the observation data of surface deformation for two consecutive years after the typical mining face is mined in the mine,it is concluded that the ground subsidence under the conditions of this well field can be divided into three periods:conduction period,subsidence period and recession period.And through the monitoring of ground subsidence data and the study of the law,the geological disasters caused by land subsidence deformation can be reduced and avoided,providing the basis for the evaluation of the stability of the upper surface of goaf.