Mining method for preventing gas overrun in initial mining period of first mining face of close-range coal seam group

The invention discloses a mining method for preventing gas overrun in an initial mining period of a first mining face of a close-range coal seam group. The method comprises the following steps: a drill site of presplitting blasting drill holes is arranged on roofs of the first mining face, the presp...

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Bibliographic Details
Main Authors ZHANG XINJING, WANG DEJIE, CHEN DAWEI, WANG YI, XIE JUN, XIE JINGNA, SUN XIANGKE, ZHOU SHUANZHU, BIAN ZHAOQING
Format Patent
LanguageChinese
English
Published 03.09.2021
Subjects
AMMUNITION
BLASTING
EARTH DRILLING
FIXED CONSTRUCTIONS
GALLERIES
HEATING
LARGE UNDERGROUND CHAMBERS
LIGHTING
MECHANICAL ENGINEERING
MINING
MINING OR QUARRYING
SHAFTS
TUNNELS
WEAPONS
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Summary:The invention discloses a mining method for preventing gas overrun in an initial mining period of a first mining face of a close-range coal seam group. The method comprises the following steps: a drill site of presplitting blasting drill holes is arranged on roofs of the first mining face, the presplitting blasting drill holes sequentially penetrate through rock masses between coal seams and an upper adjacent coal seam from bottom to top, and final holes enter the rock masses at the upper part of the upper adjacent coal seam; the presplitting blasting drill holes are filled with powder, and presplitting blasting is carried out; and after detonating, communicating seams are blasted through the energy-gathered effect of bidirectional energy-gathered pipes, and after blasting of the communicating seams is completed, waiting for arrangement of production equipment of the first mining working face to be completed is carried out. In the initial mining period, the cutting depth of a coal mining machine in the forwar
Bibliography:Application Number: CN202110581562