Which risk increased when Song Dynasty miners used black powder for underground quarrying?

💡 Explanation

Accidental stratum subsidence risk increased due to shock wave propagation from insufficiently controlled black powder explosions, leading to fractured supports; the high power caused collapse, rather than localized changes or water purification, because the Shock Wave action damaged supporting rocks.

• Which navigation error increases as wind loading exceeds the displacement tonnage during 18th-century navigation?
• Which consequence results when improperly tanned Viking longship sails weaken?
• Which optical phenomenon enabled Ibn al-Haytham's precise determination of star distances using parallax?
• Which navigational problem became solvable circa 1000 AD due to significant advances in algebra?
• Which physical consequence results when storing freshly harvested Pre-Columbian maize with excessive moisture content in a confined space?
• Which outcome occurred when ancient Mesopotamians smelted copper ore containing arsenic impurities?