Abstract: The technology of deep-hole controlling presplitting blasting tests in soft, low permeability outburst thick coal seam was carried out, by reasonable charge selecting, hole sealing and blasting technology, we made the coal within the test of blasting region produced pressure released fracture zone and a great mount of secondary cracks. From this, the stress concentration was relieved effectively and the permeability coefficient in coal seam was increased greatly. Through the tenchnology of gas drilling to control coal gas nearby the boreholes, the gas content was decreased significantly, the gas pre-drainage rate was increased several times than that of conventional method, and the effect of gas extraction was improved feasibly.