Research and development and application of high pressure air blasting technology and equipment

in order to solve the low gas diaimage rteof th low perm abilit sam a new techrology to mprove the peme pbilit wit igh pressureaiblasing in the seam was povded. The blasting wave fomed wit the high pressure ai suden reased was appled to blatheseam,tus the insit s amwoud hav tecacks c.ured andth ailatbe racks orldotbedelopedto be acrck metworkTherefoet the seam pemeatilt wa efctvely improved .The ig ressure an sting compeed equipment os reseached and develped the apr saedthe s am prmeabiliy improved fehioue withthe igh pressureair lasting The underground mine Sperimentresuls of Digi fne showedtht ater tht igh pessre ainblasing condutedthe aura atnuLation coeicint ofthe borehole gas emission was reduced by A4%,the pure voume of thegas dranmage rom muti oreholes as impoved by1,1times and the sean peAmeatilt cefrvientwas inreased over fimes.The high pressureair asting coud improve the sam pemeatltycoubd hghy nvese the se am ga emss on olumeandga edran age vouome andcoudinpove te gas drainage effect.