WATER DIVERSION FRACTURE HEIGHT TEST METHOD FOR UNDERWATER FILLING COAL MINING

摘要

Disclosed is a water diversion fracture height test method for underwater filling coal mining. The method comprises the steps of punching a drill hole (2) on a side coal wall of a working face of a solid filling coal mining working face roadway (1), arranging an electrode (4) in the drill hole (2) and the roadway (1) and collecting data, and then determining fracture development height of an overlying top plate on the working face according to a resistivity imaging change law. By means of the method, development conditions of overlying rock water diversion fracture in the underwater filling coal mining can be tested precisely, theoretical feedback data are provided for the design of the underwater filling coal mining filling rate, and a theoretical reference is provided for safe implementation of underwater filling coal mining. The test result has a practical and guiding effect on the design of a solid filling coal mining filling rate, and can guarantee safe mining when solid filling coal mining is realized underwater. The method is simple, safe and reliable, and saves time and effort.