Hydraulic Perforation Unmanned Gas Extraction Method

摘要

Disclosed is a hydraulic perforation unmanned gas extraction method, comprising: firstly perforating at the central line of coal body in the forward direction of working face for tunneling in coal roadway using a high pressure hydraulic perforating gun to form high pressure hydraulic perforation, then performing fracture in the coal body around the high pressure hydraulic perforation using a high pressure hydraulic fracturing gun to obtain the high pressure hydraulic fracturing holes with cracks, high pressure hydraulic fracturing holes are used as the outflow channels of the gas in coal body, then arranging a gas safety isolation airbag and gas extraction pipe in the roadway at the rear of the coal body, the gas extraction pipe passes through the gas safety isolation airbag into the high pressure hydraulic fracturing holes, the gas is extracted via the gas extraction pipe. The gas extraction system of the present invention enhances the work efficiency in the processes of roadway tunneling and rock cross-cut coal uncovering, and is ensures the safety of the constructors. The gas can be extracted from the coal body in front of tunneling working face and in front of rock cross-cut coal uncovering safely, efficiently and fast.