中文：

动力煤是一种用于发电和供热的煤炭，是火力发电厂的主要能源之一。动力煤的燃烧效率高，产热量大，因此被广泛应用于火力发电和工业锅炉等领域。

动力煤的产地主要集中在中国的晋、陕、蒙等地区，其中山西和陕西两省的动力煤生产量较大。此外，澳大利亚、印度尼西亚、南非等国家也是重要的动力煤生产国。

动力煤的运输一般采用铁路、水路和公路等运输方式。其中，铁路运输是最常用的运输方式之一，因为铁路运输成本相对较低，且能够实现大规模运输。水路运输则适合长距离运输，但是需要考虑到港口和航道的条件。公路运输则适合短距离和小规模的运输。

动力煤的品质指标主要包括灰分、挥发分、硫分和水分等。灰分是指煤中矿物质燃烧后剩余的残渣，挥发分是指煤中有机物在高温下分解产生的可燃气体，硫分是指煤中含有的硫元素，水分则是指煤中含有的水分。这些品质指标都会影响动力煤的燃烧效率和产热量。

随着科技的发展，动力煤的开采和利用技术也在不断进步。例如，采用综采技术可以提高采煤效率，降低成本；采用干馏技术可以将煤转化为清洁能源；采用洁净煤技术可以减少燃煤污染等。

总的来说，动力煤是一种重要的能源资源，在发电和供热等领域有着广泛的应用前景。随着环保意识的提高和能源结构的调整，动力煤的开采和利用技术也将不断进步和发展。

英文：

Thermal coal, also known as steam coal, is a type of coal mainly used for power generation and heating. It is one of the main energy sources for thermal power plants. Thermal coal has high combustion efficiency and large heat output, so it is widely used in thermal power generation and industrial boilers.

The main producing areas of thermal coal are in China's Shanxi, Shaanxi, Inner Mongolia, and other regions, with Shanxi and Shaanxi provinces producing larger amounts. In addition, countries such as Australia, Indonesia, and South Africa are also important producers of thermal coal.

Transportation of thermal coal generally uses railway, waterway, and road transportation. Railway transportation is the most commonly used mode of transportation as it has relatively low transportation costs and can achieve large-scale transportation. Waterway transportation is suitable for long-distance transportation, but needs to take into account port and channel conditions. Road transportation is suitable for short-distance and small-scale transportation.

The quality indicators of thermal coal mainly include ash content, volatile matter content, sulfur content, and moisture content. Ash content refers to the residual ash remaining after the burning of coal, volatile matter content refers to the combustible gas generated by the decomposition of organic matter in coal at high temperatures, sulfur content refers to the sulfur content in coal, and moisture content refers to the moisture content in coal. These quality indicators will affect the combustion efficiency and heat output of thermal coal.

With the development of technology, the mining and utilization technology of thermal coal are constantly improving. For example, the use of integrated mining technology can improve coal mining efficiency and reduce costs; the use of dry distillation technology can convert coal into clean energy; the use of clean coal technology can reduce pollution from coal combustion.

Overall, thermal coal is an important energy resource with a wide range of applications in power generation and heating. With the increase of environmental awareness and the adjustment of energy structure, the mining and utilization technology of thermal coal will also continue to improve and develop.