This shift is due to both improved safety standards and technology as well a move away from underground mines towards surface mining and controversial mountaintop-removal mining.
这种数据上的提高在于安全标准的提升和技术的进步，同时，地表开采和富有争议性的削山开采也使得地下开采也逐渐走到地上。
Successful predicting and controlling technology for safety mining coal on the aquifer with high-pressure are provided.
为深部煤层高承压含水层上安全开采提供了一套较成功的预报和控制技术。
The mining and technology play an all-important role in the safety production, exertion of the equipments ability, production cost, economic benefit, and so on.
煤矿开采方法及技术对煤矿的安全生产、生产设备能力的发挥、生产成本、经济效益等具有十分重要的作用。
There are series problems exist in the existing thick seam mining technology with large dip Angle, thus cause low extraction rate, poor safety and high cost.
现有的大倾角厚煤层开采技术存在着一系列问题，从而导致煤矿回采率低，安全性差，成本高。
The comrades have rich coal production scene, technology and production safety management experience, Unique coal mining and production safety management theory buried.
该同志具有丰富的煤矿生产现场、技术和安全生产管理经验，独到的煤炭开采和安全生产管理埋论。
The roadway manage, actual mining and support beside roadway in thin coal seam are introduced. Through planing reliable safety technology measures, better economic benefit has been achieved.
简要地介绍了薄煤层前进采煤的巷道布置、回采工艺及巷旁支护等，制定了切实可行的安全技术措施，取得较好的经济效益。
The roadway manage, actual mining and support beside roadway in thin coal seam are introduced. Through planing reliable safety technology measures, better economic benefit has been achieved.
简要地介绍了薄煤层前进采煤的巷道布置、回采工艺及巷旁支护等，制定了切实可行的安全技术措施，取得较好的经济效益。
应用推荐