地面-井下联合地震勘探确定岩溶陷落柱空间分布
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摘要
为查明谢桥煤矿东二采区两个煤系岩层不均匀下沉的地质异常体构造的性质,利用验证孔及其测井曲线人工合成记录标定出地质异常体内的主要煤层层位,对三维数据在钻孔资料约束下重新处理,获得多属性切片与剖面,初步判定异常体为疑似陷落柱;再在井下采用高精度三分量震波勘探,探测结果表明,13118工作面东翼运输巷的8煤底板向下煤岩层分布尚稳定,只在测线中段出现煤层及其顶底板破碎现象,工作面南侧存在一直径150~200m陷落柱,其北边界最近仅距离巷帮10m左右。依据这种综合勘探结果拟定注浆封堵工程,工程施工证实探测结果是准确的。
In order to define the abnormal structure features of the inhomogeneous subsidence geology for two coal measures strata in East No. 2 mining blocks of Xieqiao Mine in Huainan Coalfield, the artificial synthetic records of the verification drilling holes and logging curves were applied to demarcate the main seam locations in the geological abnormal mass. The three dimension data were reprocessed with the drilling borehole information constraints. The multi attribution sections and cross sections were obtained from the reprocessing. The abnormal mass was preliminarily defined as the seemed sink hole. Then the high precision three components seismic survey was applied in the underground mine. The survey results showed that the distribution of the coal seam and strata were unstable under the No. 8 seam floor in the east wing transportation gateway of the No. 13118 coal mining face. There was a coal seam with broken roof and floor in the middle of the survey line. There was a sink hole with a diameter of 150~200 m in the south side of the coal mining face. The north boundary of the sink hole had only a distance about 10 meters to one side wall of the gateway. According to the comprehensive survey results, a grouting and sealing project should be conducted. The project construction conformed that the survey result was correct.
In order to define the abnormal structure features of the inhomogeneous subsidence geology for two coal measures strata in East No. 2 mining blocks of Xieqiao Mine in Huainan Coalfield, the artificial synthetic records of the verification drilling holes and logging curves were applied to demarcate the main seam locations in the geological abnormal mass. The three dimension data were reprocessed with the drilling borehole information constraints. The multi attribution sections and cross sections were obtained from the reprocessing. The abnormal mass was preliminarily defined as the seemed sink hole. Then the high precision three components seismic survey was applied in the underground mine. The survey results showed that the distribution of the coal seam and strata were unstable under the No. 8 seam floor in the east wing transportation gateway of the No. 13118 coal mining face. There was a coal seam with broken roof and floor in the middle of the survey line. There was a sink hole with a diameter of 150~200 m in the south side of the coal mining face. The north boundary of the sink hole had only a distance about 10 meters to one side wall of the gateway. According to the comprehensive survey results, a grouting and sealing project should be conducted. The project construction conformed that the survey result was correct.
引文
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