露头区综放工作面玄武岩含水层出水原因分析及对策

Cause analysis and countermeasures for water inrush in fully mechanized top coal caving face in shallow coal seam outcrop area

以内蒙古多伦协鑫煤矿白垩系煤层浅部1709-1露头区综放工作面涌水事故为例展开分析研究,以钻孔资料为基础建立地质模型,综合分析了工作面开采对含水层的影响及覆岩破坏特征,查明了出水水源和导水通道,明确了出水是由于井田边界煤层露头区处工作面基岩厚度薄,导水裂缝带波及到工作面上方的玄武岩弱含水层,并由边界强富水性侵蚀带补给造成的。此外,提出了露头区浅部工作面水害防治综合对策,制定了防治水安全措施,为工作面安全生产提供保障。

Based on the engineering background of water burst accident in cretaceous shallow coal seam of 1709^-1 working face of Duolun Xiexin Coal Mine Inner Mongolia, geological model was established on the basis of borehole data, the impact of working face mining on aquifer and the features of overburden failure were comprehensively analyzed, the water source and water channel were found, confirmed the cause of water inrush was that, the working face bedrock was thinner in coal seam outcrop area, water flowing fractured zone affected to the basalt weak aquifer above the working face, which was supplied from strong water erosion at the border. The paper proposed countermeasures for prevention and control of water disasters in the outcrop area of shallow face, and formulate measures for water prevention and control, ensuring the safety for mining.