问题:井下空气最适宜的温度是与人体体温保持一致,即36℃左右。...
Thursday, September 15, 2022
问题:电爆破专用的爆破仪表有两类,爆破()(导通仪)和爆破线路电桥。...
Thursday, September 15, 2022
Sunday, September 11, 2022
问题:矿尘对人体危害作用有化学作用、物理机械作用、()。...
Wednesday, February 21, 2024
问题:直线掏槽时各眼距为(),适用于整体性好的韧性岩石和较小的巷道断面...
Thursday, September 15, 2022
Sunday, September 11, 2022
问题:遇顶帮岩石破碎或平行节理发育地段,开孔前不必要做的工作()。A、检撬浮石B、调整排位C、支护巷道...
Saturday, September 23, 2023
Friday, March 31, 2023
Thursday, September 15, 2022
问题:井巷钻眼爆破掘进时,通常将炮眼分为()、辅助眼和周边眼三种。...
Thursday, December 8, 2022
问题:多孔粒状铵油炸药主要性能:猛度15mm,爆速()m/s,爆力300mL,密度085-095g/cm3...
Tuesday, July 25, 2023
问题:按安装和()不同,风动凿岩机分为风动气腿式、风动导轨式和风动()...
Thursday, September 15, 2022
Thursday, September 15, 2022
Thursday, September 15, 2022
Sunday, September 11, 2022
Sunday, September 11, 2022
Sunday, September 11, 2022
问题:某工地采用焚烧法销毁尚未用完的爆破器材发生爆炸事故,事故原因可能...
Thursday, September 15, 2022
问题:木粉混合在硝铵类的粉状炸药中除作可燃剂外,还能起()的作用。...
Sunday, September 11, 2022
Thursday, September 15, 2022