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。
The surface subsidence of coal cities is created by the coal mining underground, it is necessary to make the territorial planning of coal cities, which based on the geological conditions.
煤层的地下开采造成煤矿城市的地面沉陷，应搞好以地质状况为基础的煤矿城市的国土规划。
The mining minister in Chile says all is going well in the efforts to bring to the surface 33 miners who have been trapped deep underground for more than two months.
智利矿务部长表示，拯救33名被困矿工的工作进展顺利。这33名矿工已经在地面以下深处被困了超过两个月的时间。
To control the surface movement caused by mining, the backfill mining method was adopted for underground mining in Sijiaying Changyu iron mine.
司家营常峪铁矿为控制采矿引起的地表岩移，采用地下开采充填采矿法采矿。
Along with the underground mining of mineral, the damage of the surface subsidence due to mining is gradually serious.
随着地下矿藏的开采，矿区开采沉陷所带来的损害日趋严重。
Take an underground copper mine as studying object, on which the surface has to be protected, the mining method of sublevel filling method with roof reconstructing is studied.
以某地下铜矿为研究对象，研究了地表要求保护的前提下极破碎矿体的顶板再造上向分段充填采矿法。
The collapse of overburden layer and land surface due to underground mining is one kind of environmental hazards induced by human being.
采矿区覆岩及地表塌陷是涉及全球性人为环境灾害之一。
The laws of ground surface subsidence and rock mass movement in east area of Chenchao iron mine due to underground mining are studied.
以大量的现场实测资料为基础，分析了程潮铁矿东区地下采矿引起的地表沉降和岩层移动规律。
The laws of ground surface subsidence and rock mass movement in east area of Chenchao iron mine due to underground mining are studied.
以大量的现场实测资料为基础，分析了程潮铁矿东区地下采矿引起的地表沉降和岩层移动规律。
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