辽源煤矿采空区重力异常解释研究  

Gravity Anomaly Interpretation of Mined-out Area in Liaoyuan Coal

作　　者：张旭[1] 杜晓娟[1] 苏超[1] 黄航[1] 

机构地区：[1]吉林大学地球探测科学与技术学院,吉林长春130021

出　　处：《工程地球物理学报》2015年第6期755-759,共5页Chinese Journal of Engineering Geophysics

基　　金：国家科技支撑计划项目(编号:2009BAB43B00)

摘　　要：地下采空区对于城市安全是一个潜在的地质灾害,因此需探明其具体的位置、深度和分布范围,为煤矿采空区的土地综合规划和开发提供科学依据。辽源煤矿位于吉林省东南部,其煤层开采殆尽,遗留下大量的采空区,且大多分布于市区范围内。煤矿采空区的密度小于围岩的密度,因此会产生一定的负重力异常。针对该区微重力测量结果,首先采用小子域滤波法进行场分离,然后采用边界识别和聚焦反演方法获得采空区的分布。结果表明,微重力测量结合有效的处理与解释方法,可实现采空区具体分布范围的圈定。The underground mined-out area is a potential geology disaster for city,and geophysical tool should be used to detect the location,depth and scope to provide a scientific basis for the land comprehensive planning and development of the mined-out area.Liaoyuan coal mine is located in the southeast of Jilin Province,the coal seam was mined and there were a large number of mined-out area almost located in the urban area.The density of mined-out area is smaller than the wall rock,so the mined-out areas will occur negative gravity anomaly.For the microgravity measurement results,small sub-domian space filter is used to finish the filed separation to obtain the gravity generated by the mined-out area,and then edge detection method and focused inversion are used to ascertain the location and depth of mined-out area.The result shows that the microgravity measurement combining with processing and interpretation method,can delineate specific distribution scope of the mined-out area.

关 键 词：采空区 重力 小子域滤波 边界识别 聚焦反演 

分 类 号：P631.1[天文地球—地质矿产勘探]