Striding-type quick excavation method for down steps of surrounding rocks of grade IV-V of dual-track tunnel
The invention provides a striding-type quick excavation method for down steps of surrounding rocks of a grade IV-V of dual-track tunnel and relates to the field of engineering construction. The methodsuccessively comprises the following steps: a down step blast area is divided into a left area and a...
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| creator | MEI HONGBO SUN JINSHAN ZHANG XIN |
| description | The invention provides a striding-type quick excavation method for down steps of surrounding rocks of a grade IV-V of dual-track tunnel and relates to the field of engineering construction. The methodsuccessively comprises the following steps: a down step blast area is divided into a left area and a right area which are symmetrical with an excavation center line of a working area face of a blasttunnel as the interface, shot holes are disposed on the left side of the excavation center line, and one-time drilling and in-place charging are carried out. One-time explosion initiation is carried out, and ventilation is carried out quickly after blasting; loading equipment and matched self-unloading equipment are carried out for quick tapping; danger elimination is carried out; an arc bridge isjointed in length, a roof truss frame is erected for each interval of a roof truss, a locking pin anchor tube is disposed, U-shaped rebar is used for welding reinforcement, and a reinforcement mesh is hung; and arc frames, loc |
| format | Patent |
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The methodsuccessively comprises the following steps: a down step blast area is divided into a left area and a right area which are symmetrical with an excavation center line of a working area face of a blasttunnel as the interface, shot holes are disposed on the left side of the excavation center line, and one-time drilling and in-place charging are carried out. One-time explosion initiation is carried out, and ventilation is carried out quickly after blasting; loading equipment and matched self-unloading equipment are carried out for quick tapping; danger elimination is carried out; an arc bridge isjointed in length, a roof truss frame is erected for each interval of a roof truss, a locking pin anchor tube is disposed, U-shaped rebar is used for welding reinforcement, and a reinforcement mesh is hung; and arc frames, loc</description><language>chi ; eng</language><subject>AMMUNITION ; BLASTING ; EARTH DRILLING ; FIXED CONSTRUCTIONS ; GALLERIES ; HEATING ; LARGE UNDERGROUND CHAMBERS ; LIGHTING ; MECHANICAL ENGINEERING ; MINING ; SHAFTS ; TUNNELS ; WEAPONS</subject><creationdate>2020</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20201016&DB=EPODOC&CC=CN&NR=111780633A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25563,76318</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20201016&DB=EPODOC&CC=CN&NR=111780633A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>MEI HONGBO</creatorcontrib><creatorcontrib>SUN JINSHAN</creatorcontrib><creatorcontrib>ZHANG XIN</creatorcontrib><title>Striding-type quick excavation method for down steps of surrounding rocks of grade IV-V of dual-track tunnel</title><description>The invention provides a striding-type quick excavation method for down steps of surrounding rocks of a grade IV-V of dual-track tunnel and relates to the field of engineering construction. The methodsuccessively comprises the following steps: a down step blast area is divided into a left area and a right area which are symmetrical with an excavation center line of a working area face of a blasttunnel as the interface, shot holes are disposed on the left side of the excavation center line, and one-time drilling and in-place charging are carried out. 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| language | chi ; eng |
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| subjects | AMMUNITION BLASTING EARTH DRILLING FIXED CONSTRUCTIONS GALLERIES HEATING LARGE UNDERGROUND CHAMBERS LIGHTING MECHANICAL ENGINEERING MINING SHAFTS TUNNELS WEAPONS |
| title | Striding-type quick excavation method for down steps of surrounding rocks of grade IV-V of dual-track tunnel |
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