The present application relates to the technical field of
tunnel construction, in particular to a medium-wind-pressure
slag discharge construction process under the geological conditions of super-large buried depth and
high stress soft
coal seam, comprising the following steps: S1, establishing a
slag discharge system, the
slag discharge system comprising a medium-wind-pressure conveying
system and a ground slag discharge system, the ground slag discharge system being communicated with a
coal uncovering hole through a slag discharge channel, the slag discharge channel and the
coal uncovering hole axis intersecting at an included angle, the included angle M satisfying 30°≤M<90°; S2, drilling construction; S3, installation of an extraction
pipe; S4, regular extraction and checking of extraction concentration. The gas can be diluted by air pressure, the
gas concentration is reduced, and the construction safety is ensured. Meanwhile, the slag is conveyed to the ground slag discharge system through the slag discharge channel which is separately established and intersects with the coal uncovering hole at an
acute angle, the slag can smoothly enter the slag discharge channel along the drilling axis direction, the slag conveying distance between the
drill pipe and the ground slag discharge system is extended, which is conducive to avoiding the situation of hole spouting caused by slag blockage at the hole position, the slag
discharge efficiency is improved, and the hole spouting risk is reduced.