Study on the reconstruction technology of karst fall column-fault-fracture property in Gubei Coal Mine

The major threats of coal seam mining in North China are fault, fall column and fracture water inrush.At present, the key scientific problems to be solved are the implicit construction and attribute reconstruction.The coal seam of Gubei Coal Mine is a high water pressure and thin resistance water layer, which is not only threatened by the limestone water of Taiyuan Group on the bottom plate, but also seriously restricted by the hidden access to the Ordovician system.Based on the practice of hidden structure exploration and reconstruction engineering in Gubei Coal Mine, the straight layer branch double-layer grouting method is used to reconstruct the 2^# fall column-fault-fracture properties.It effectively changes activation and harmfulness, and putting forward two structural attribute reconstruction modes of single layer reconstruction and double layer reconstruction.This paper provides a further systematic analysis of 2^# fall column in No.1 coal seam mining area of Gubei Coal Mine and associated fault exploration, management process, and the focus of regional advanced branch exploration management effect.The inspection treatment effect is good.It establishes with three-dimensional seismic, vertical drilling technology, the branch of drilling technology as the core of the hidden structure exploration technology new system.It can provide guarantee for the safe and efficient mining of coal mines, and provide technical methods and theoretical support for the research of hidden structure of North China coal field.