【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。更多还原

【Abstract】 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.更多还原