Coal mines in Jharkhand are located at:

Jharkhand is a state in eastern India known for its rich mineral resources, including coal. The state is home to several coal mines that contribute significantly to the country's coal production. Among the various locations in Jharkhand, the coal mines are primarily concentrated in Jharia.

1. Jharia:
Jharia is a town in Dhanbad district of Jharkhand and is famous for its coal mines. It is one of the largest coalfields in India and has been a major contributor to the country's coal production. Jharia coalfield is spread across an area of about 450 square kilometers and is estimated to have reserves of around 19 billion metric tons of coal. The coal mines in Jharia are operated by Bharat Coking Coal Limited (BCCL), a subsidiary of Coal India Limited.

The coal mines in Jharia have been in operation for more than a century and have played a crucial role in the development of the region. However, the extensive underground mining activities have led to subsidence and the formation of large-scale underground fires, making Jharia one of the most fire-prone areas in the world. Efforts are underway to mitigate the environmental and safety concerns associated with the coal mines in Jharia.

2. Other Coal Mining Regions:
While Jharia is the primary location for coal mining in Jharkhand, there are also coal mines situated in other regions of the state. Some of these regions include:

- Jamshedpur: Jamshedpur is a city in Jharkhand known for its industrial activities, including steel production. While it is not a significant coal mining area, there may be smaller coal mines or coal-related industries in the vicinity.

- Ranchi: Ranchi is the capital city of Jharkhand and is not primarily known for coal mining. However, there might be some smaller coal mines or coal-related activities in the outskirts of the city.

- Lohardaga: Lohardaga is a district in Jharkhand and is known for its rich mineral resources, including coal. The district may have some coal mines or coal-related industries.

Overall, while Jharia is the major coal mining area in Jharkhand, there are also coal mines located in other regions of the state, albeit on a smaller scale.