The coal resources mining right has the same characteristics as option, which is a multi-period call option exercised annually.

煤炭资源采矿权具有和股票看涨期权一样的期权特性，本质上是一种按年度执行的多期看涨期权。

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Firstly it defines the concept and connotation of green mining logistics based on analysis of the composition of mine production and logistics and the feature of coal resources mining and logistics.

在矿井生产物流组成和煤炭资源开采物流特点分析的基础上，首先界定了矿井绿色开采物流的概念及其内涵；

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Don Blankenship, CEO, Massey energy: "Most coal mined by surface mining cannot be deep mined... energy resources would be lost if not surface mined... our company is an energy company," he added.

Massey Energy的首席执行官Don Blankenship表示：“采用地表采矿，大多数煤炭不能深采…不采用地表采矿，会造成能源损失…我们公司是能源公司。”

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The prospects for coal in the U.S. have suffered lately and weighed on coal mining companies such as Alpha Natural Resources.

FORBES: CSX Chugs To $25 Despite King Coal's Weakness

Of the bottom five stocks, I recommend only one: coal-mining company Alpha Natural Resources (ANR).

FORBES: 5 Worst Stocks of the Year -- Which Are 'Buys' for 2012?

The Bakries, backed by the independent non-executive directors, have offered to buy back Bumi Resources, leaving Bumi PLC with the Berau coal-mining assets in a deal that would leave shareholders with a loss of about 50% on their original investment.

WSJ: London Needs Full Inquest