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- big mining depth 大采深
- Wengquangou paigeite ore is a big mine in Fengcheng city of Liaoning province. 辽东硼铁矿床是一处类型独特的超大型矿床。
- With the increase of mining depth, the problem of floor heave of roadway could become more and more serious. 摘要随着开采深度的不断增加,巷道底鼓问题日趋严重。
- With the increase of mining depth,the possibility for rock burst increases correspondently. 随着煤矿开采深度的增加,冲击地压危险越来越大,已成为严重威胁矿井安全生产的主要灾害。
- The analytical solution of roadway discharge is given,under the condition of rock permeabillty attenuation with mining depth increase. 给出了在岩石渗透性随深度衰减条件下,二维稳定流巷道涌水量的解析解。
- The big mining companies all believe that high commodity prices will return, although no one is prepared to say when. 所有的大型矿业公司都相信高价商品时代会再现,虽然没人准备说出具体时间。
- In Xuzhou Coal Mining Area the groundwater hazard is serious due to the larger mining depth and complicated hydrogeological conditions. 徐州矿区开采深度大,水文地质条件复杂,水害严重。主要突出水源为奥陶系含水层。
- The coordinates of the centre point of a subsidence trough are calculated by the effect transference angle and the mining depth. 利用平面图形几何重心公式计算回采工作面水平投影图形的重心坐标,然后根据影响传播角和开采深度计算下沉盆地中心位置的坐标。
- Vale do Rio Doce, boosting the fortunes of big mining firms at the expense of steel producers and their customers world-wide. 分析人士预计,在未来几周中,中国及其他国家和地区的钢铁企业达成的铁矿石采购价格会与此相当,甚至更高。
- Alongside mining depth of mine continuing,roadway support displays out soft rocks feature,anchor way of bolt must expand from end bolt to long bolt and all bolt. 随着矿井采深的不断加大,巷道支护表现出软岩支护的特点,锚杆锚固方式由端锚逐步向加长锚、全锚方向发展。
- An initial mining depth in the thick seam or a depth of a full seam cut will cause an obvious increasing in crack height and also in horseshoe distribution. 增大重复开采厚度以提高采煤工效和矿井经济效益;
- As mining depth of the stope area and geopressure increase,stope wall rock and obsturator are of the possibility of serious yielding destruction and whole instability. 随着开采深度的增加,采场面积扩展和地压增大,采场围岩及充填体潜在着严重的屈服破坏和整体失稳的可能。
- With mining depth increasing continuously in our country,in condition of mining in the deep-lying,there are many problems in determining displacement angle of stratum at present. 随着我国煤矿开采深度的不断增加,指出了目前岩层移动角的确定存在诸多问题。
- With the increase of mining depth,pre-mining rock stresses increase dramatically,which leads to the rise of the frequency of rock burst occurrence and the drop of mine safety. 随着矿山开采深度的增加,原岩应力水平大大提高,导致岩爆等灾害发生频率提高,矿山生产的安全性下降。
- The National Coal Board says that if consumption continues to fall,several big mines will have to go in to short time of stop production altogether. 国家煤矿委员会说如果消费继续减少,几家大煤矿不得不减少工时或完全停止生产。
- The National Coal Board says that if consumption continues to fall, several big mines will have to go in to short time of stop production altogether. 国家煤矿委员会说如果消费继续减少,几家大煤矿不得不减少工时或完全停止生产。
- Our firm is likely to reap a big profit this year. 今年我们公司很可能获得巨额利润。
- The thesis analyzes the effect of the increase of mining depth on the floor heave, discusses the laws that gravity stress, tectonic stress, the strength of surrounding rock, terrestrial heat and imbibition water change with the increase of mining depth. 分析了采深对巷道底鼓的影响,以及自重应力、构造应力、围岩强度、地温、水随开采深度变化的规律。
- As state-owned of small coalpit of the ageing of big mine and villages and towns shut thoroughly, once brilliant old economy adding up to hill dropped when new old century is alternant trough. 随着国有大矿的老化和乡镇小煤窑的彻底关闭,曾经辉煌了多年的合山经济在新旧世纪交替之际一下跌入了低谷。
- With the downward movement of crebody mining depth in Meishan Iron Mine, the ground cave-in area hasbecome larger and the ground pressure more evident and the undergrou ad joints, fissures, faults and drift cave-in more serious. 梅山铁矿随着矿体开采深度的下移,地表塌陷面积越来越大,地压显现越来越明显,井下节理、裂隙、断层、巷道跨冒现象越来越严重;