Coal mine excavation 煤矿采掘过程
mine tunnel excavation 矿山巷道掘进
mine underground excavation 矿山法暗挖
mine mining excavation plan 采掘计划
excavation for mine 矿山采掘
The draft of coal mine excavation plan is typically an unhealthy structural and complex tech economic problem.
矿井采掘计划的编制是典型的不良结构和复杂的技术经济问题。
Through reforming ventilation system in fire area, the capacity in disaster prevention of coal mine has improved to ensure the mine excavation disposal is proceeding orderly.
通过对火区影响范围系统进行改造，提高了矿井防灾抗灾能力，保证了矿井采掘部署有序进行。
They pointed out that the excavation of fossil fuels has its own history of catastrophic accidents, including coal mine collapses and the recent BP oil spill in the Gulf of Mexico.
他们指出化石燃料的挖掘也有导致灾难性事故的历史，包括煤矿垮塌和最近英国石油在墨西哥湾的漏油事件。
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