Research On Gas Extraction Technology Of Low Permeability And Soft Coal Seam

Dealing with the problems of low permeability and gas extraction difficulty ofWuyang mine soft coal seam, this paper researches the gas extraction technology andextraction hole design and extraction system optimazing. This paper analyzes allkinds of methods and craft of gas extration. By the coal and rock test piece takenunderground, test the rock physical mechanics parameters of Wuyang mine inlaboratory. Combining producing actuality of Wuyang mine, researches thetechnology of gas extraction while driving and gas extraction while mining.Constructing numerical model with RFPA, analyzes the influence of holes distanceand extraction time and extraction negative pressure to gas extraction effect. Basingon this, proposes the solutions to the extraction problems. Analyzes the feasibility ofdeep hole control presplit blasting technology, and make a elementary design ofblasting schemes.