Thursday, February 1, 2024
问题:综采放顶煤开采一个循环结束是以()工序完成为标志。A、放煤B、移架C、移溜
Thursday, February 1, 2024
Thursday, February 1, 2024
Saturday, December 2, 2023
问题:单体液压支柱配Π型钢支护采面中排柱初撑力是()KN。A、30B、55C、90
Sunday, September 11, 2022
问题:浅眼装药爆破大块岩石时,最小抵抗线和封泥长度都不得小于()。A、0.5mB、0.3mC、0.1m
Monday, January 29, 2024
Sunday, September 11, 2022
Friday, October 20, 2023
问题:郑煤集团公司执行的采掘工作面三项评价是指瓦斯防治评价、水害防治评价和()。
Tuesday, September 13, 2022
Sunday, September 11, 2022
Thursday, December 15, 2022
Thursday, February 1, 2024
Tuesday, September 13, 2022
Wednesday, February 8, 2023
问题:采煤机工作时电动机输出的功率主要消耗在()。A、截煤B、牵引C、装煤
Thursday, February 1, 2024
Friday, October 20, 2023
问题:《煤矿安全视程》第四十五条规定,在揭露老空时,只有()方可恢复工作。A、将人员撤至安全地点B、证明老空内无危险C、进行瓦斯抽放后
Friday, January 26, 2024
Wednesday, June 7, 2023
问题:采煤工作面冒顶来不及撤退到安全地点时,遇险者应靠()贴身站立。
Saturday, December 9, 2023
问题:采区回风巷、采掘工作面回风巷风流中瓦斯浓度超过()%或CO2浓度超过1.5%时,必须停止工作,撤出人员,采取措施,进行处理。A、1.0B、2.0C、3.0
Sunday, September 11, 2022