冲积层下煤层顶板水害探测与防治技术研究

Study on Water Hazard Detection and Prevention Technology of Coal Seam Roof under Alluvial Layer

冲积层底部含水性严重威胁冲积层下采煤的水害防治安全,在煤层开采前及开采过程中都需要采取相应的防治水措施以杜绝重大水害事故的发生。因此,为保障厚冲积层煤层放顶煤安全、高效开采,文章开展基于并行电法的冲积层下煤层顶板水害探测与防治技术研究,通过数值模拟及现场实测得到顶板局部富水所引起的响应特征。结果表明,对水体高度敏感的并行电法能够精准、高效地识别顶板富水状态,基于此可进一步提出相应的水害防治措施,进而为冲积层下采煤工作面防治水工作提供关键指导依据。

The water content at the bottom of the alluvium seriously threatens the safety of water damage prevention and control in coal mining under the alluvium.Corresponding scientific water prevention and control measures need to be taken before and during coal seam mining to prevent the occurrence of major water damage accidents.Therefore,in order to ensure the safety and efficient mining of top coal caving in thick alluvium coal seams,this article conducts research on the detection and prevention technology of water damage in coal seam roof under alluvium based on parallel electrical method.Through numerical simulation and on-site measurement,the response characteristics caused by local water accumulation in the roof are obtained.The results indicate that the parallel electrical method,which is highly sensitive to water bodies,can accurately and efficiently identify the water rich state of the roof.Based on this,relevant water hazard prevention and control measures can be further proposed,providing key guidance for water prevention and control work in coal mining faces under alluvial layers.