Opposite-direction energy-gathered explosion breaking dangerous method for high-gas coal seam impact dangerous area

• Main Authors: HU SHIXIONG, LIU WEI, GUO ZHAOSHUN, YANG RUIBIN, WANG FEI, CUI GUANGYONG, YU XUEQIANG, GANG ZHANWEI, WANG HONGTAO, CHEN FANGMING, PAN KEJU, MA YANKUN
• Format: Patent
• Language: Chinese; English
• Published: 09.08.2024
• Subjects: AMMUNITION; BLASTING; EARTH DRILLING; FIXED CONSTRUCTIONS; GALLERIES; HEATING; LARGE UNDERGROUND CHAMBERS; LIGHTING; MECHANICAL ENGINEERING; MINING; MINING OR QUARRYING; SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, ORDRAINING IN OR OF MINES OR TUNNELS; SHAFTS; TUNNELS; WEAPONS

The invention belongs to the technical field of rock burst prevention and control, and discloses an opposite-direction energy-gathered explosion breaking dangerous method for a high-gas coal seam impact dangerous area. Pre-pressure-relief drill holes are constructed in a coal seam in a roadway, and two rows of blasting drill holes are constructed in the pre-pressure-relief drill holes and above and below the pre-pressure-relief drill holes. And selecting drilling holes in the two rows of blasting drilling holes for charging and placing an energy-gathering cover, and carrying out conventional hole sealing on the other drilling holes and connecting an extraction pipeline. And marshalling the adjacent blasting drill holes and simultaneously detonating. The pre-pressure-relief drill holes and the blasting holes are arranged in rows, so that a deformation space is provided for shaped charge blasting, the utilization rate of explosive energy is improved, coal in a charging blasting area is crushed more sufficiently