Earthjustice, a nonprofit environmental law firm, is suing to block the lease of state-owned land in Otter Creek, Mont., to Arch Coal for mining to serve demand in Asia and elsewhere.
地球公正，一个非盈利的环保律师事务所，正在请求阻止租赁蒙大拿奥特·克里克的国有土地和劝阻阿奇煤炭公司开采煤矿用于满足亚洲和其它地区的需求。
Simulation testing and theoretical analysis were made to study generating mechanics and moving evolutionary process of "granular arch" structure of upper immediate roof in top coal caving.
通过相似模拟实验和理论分析，研究了综放条件下上位直接顶“散体拱”结构的形成机理和移动演化过程。
Revamp on boiler arch can distribute wind well to improve efficiency, decrease the selection of coal kind and get good economical result.
对原锅炉炉拱改造，使炉内布风合理，提高锅炉效率，降低燃煤煤种的选择性，得到良好的经济效益。
A new kind of technique, the vortex arch suited to blind coal combustion for conveyor stoker is investigated.
提出一种能够用于链条炉燃用无烟煤的涡流拱新技术。
The influencing factors of coal arch camber in planomural coal bin and coal drop pipe with rectangular or circular cross section during coal drop are studied theoretically.
对落煤过程中平壁煤仓及截面形状分别为矩形、圆形的落煤管起拱的影响因素进行理论研究。
The paper provided the mechanics model of the multi strata arch structure in the top coal and pointed the related factors of the influence structure features.
并提出了顶煤体中“跨层拱”结构的力学模型，指出了影响结构特征的相关因素。
It is proven that the technique of the top-caving with vibration can easily destroy the arch structure, resulted in improving the top coal recovery ratio.
验证了振动放顶煤技术原理及其机构的可行性，证明了采用振动放顶煤技术可有效地提高顶煤采出率和降低混矸率。
The research results showed that an arch structure would be formed in the top coal above the supports.
研究表明，支架上方顶煤体中能够形成“拱”结构，该结构的存在将对工作面矿山压力显现产生显著影响。
Finally, the coal-rock mass in the arch angle and apex is slided, and causes the distortion of local rock pressure, even induces dynamic hazards around working face.
拱角与拱顶煤岩滑落失稳，造成工作面局部压力畸变并诱发动力学灾害。
Finally, the coal-rock mass in the arch angle and apex is slided, and causes the distortion of local rock pressure, even induces dynamic hazards around working face.
拱角与拱顶煤岩滑落失稳，造成工作面局部压力畸变并诱发动力学灾害。
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