摘要
探测的对象为某煤矿二矿井田西部二1煤的采空情况。本区采空区表现为高电阻率或次高阻,对比下伏高阻基岩(C+∈),在其顶部出现的局部高阻区被确认为二1煤采空区的电性标志。本次勘探以勘探深度大、对局部电性变化反应灵敏的偶极-偶极电阻率测深为主,并采用对称四极电阻率测深与瞬变电磁法辅助探测。通过对照解释,圈定三条测线中二1采空区异常点及复合异常点近10个,深度在200m左右;另外圈出深度在100m以浅三9采空区数异常点5个。
The subject investigated is the gob area of coal Ⅱ1 in minefield No. 2 of a coalmine. Relative to underlying high resistivity bedrock( C + ∈),the overlying coal measures top local high resistivity area has been identified as the electric indicator of coal Ⅱ1 gob area. The dipole-dipole resistivity sounding with deep prospecting depth and sensitive reaction on local electric changes has been selected as the main means,supplemented by quadrupole resistivity sounding and TEM. Through comparative interpretation,have delineated near 10 abnormal points and compound abnormal points of coal Ⅱ1 gob area with depth about 200 m; in addition,delineated 5 abnormal points with depth above 100 m.
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