英语翻译1.Some features formed during peat accumulation or shortly thereafter,whereas others developed long after deep burial and coalifiction.2.Coal mining involves both basic unit operations in the production and handling of coal and auxiliary

英语翻译1.Some features formed during peat accumulation or shortly thereafter,whereas others developed long after deep burial and coalifiction.2.Coal mining involves both basic unit operations in the production and handling of coal and auxiliary
英语翻译
1.Some features formed during peat accumulation or shortly thereafter,whereas others developed long after deep burial and coalifiction.
2.Coal mining involves both basic unit operations in the production and handling of coal and auxiliary operations of a service nature that are essential but do not contribute directly to the output of coal.
3.The complex system of forces]and the resulting rock mechanical problems (developed by mining activities at different levels)result in significant differences between European and US underground development．
4.Few items in mine development are as costly as the mine portals since several will be generally employed in a fairly large mine to provide access for men and supplies and for ventilation．
5.However,as the face advances further,the entry ribs in the gob area yield and move the position of the peak side abutment outward to a distance approximately equal to 15％ of the overburden thickness．
6.Much of the success of the system in any circumstances depends upon the distance that the requisite number of roads has to be driven in the solid before the retreating faces can be put into full production,and upon the effect of the natural phenomena upon these roads until they are no longer needed ．

英语翻译1.Some features formed during peat accumulation or shortly thereafter,whereas others developed long after deep burial and coalifiction.2.Coal mining involves both basic unit operations in the production and handling of coal and auxiliary
1.一些特性中形成的泥炭堆积或此后不久,而其他发达的长深埋和coalifiction之后.
　　2.煤矿包括基本单元操作生产和处理的煤和辅助服务的操作自然至关重要但不直接导致煤炭的输出.
　　3.这个复杂的系统,军队]和由此产生的岩石力学问题由矿业活动在不同层次)导致显著差异元素
4.在矿井开发的几个项目是昂贵的,因为我的门户网站,因为许多将通常部署在一个相当大型煤矿为男性提供访问和物资并进行通风.
　　5.然而,当面临进一步进展,入口的肋骨在采空区地区产量和移动位置峰的一侧距离桥台外约等于15%的覆盖层厚度.
　　6.很多成功的系统在任何情况下取决于距离必要数量的反渗透