Mined-out areasurvey as the part of mineral resource exploration played an important rule in recovery of mined-out area and mine safety control.
在固体矿产资源调查过程中，采空区综合信息对于残矿回采、矿山安全具有十分重要的意义。
2
At last, the effectiveness of using integrated geophysical methods to the coal mine gob areasurvey with specific engineering exploration is proved.
最终，结合具体工程勘查实践，证明了在煤层采空区勘查中采用综合地球物理勘查技术的有效性。
3
The measurement of net arable land coefficient is of great importance in investigating the status of land-use, aiming at improving accuracy of the areasurvey.