Study on roof cutting,pressure released and gateway driving technology in Shendong Mining Area

in orer to inplement the oo cuiting,ressure released and roaiwvay driving fechnolog in Shendong Mining Area,taking No.12201 transportation gateway in Hralagu MKine as a cae a siot hole and basting slt wer frsty constructed in the roo of the mine gateway.the constantresistance anchor was applied to make the addtional enhanced suport of the gateway retained during the mining period and a single suppot was conducted in the stable area of the withdrawn gateway.Mfenwhile the shotcreting was conducted on the side gateway wall in the goaf and the of cuting,pressure released and gateway driving was feally realized. The results showed that ater the oo cuiting ,ressue released and gateway driving of N0o.12201transpotation gateway,the max load of the constant res stance anchor woul be286.7 k N,the max lateral pressure would be 2.0 MRa and the profile of the gateway was excellnt.The ventliation nethod of the gatevay retained was iproved and the safety mining was realied.The appication of the technology was sumnmarized. The of cuting and gatewa retained technogy would be suitableto thefully mechan2ed coal mining face with a mining heightlss than 3 m and the roof co ition with mediunm grade. An optinization and reconstouction were conducted on the existed blasting slotitig problem .suppor and constution parameters and nethod and could provide the references to promote the roof cuting,pressure released and gateway driving technology in Shendong Mining Area.