Quickwrite Quiz

What are the 3 types of subsurface coal mining?
Describe the four steps of the 1st one described in the video.

The 3 types of subsurface mining include [1] conventional board and pillar mining, [2] blasting gallery technology, and [3] long wall mining. According to the "How Is Coal Mined?" video, conventional mining has four steps: 1) drilling, 2) blasting, 3) lifting, and 4) loading. In the first step, drilling, the workers drill into the wall in order to place an explosive within the wall. In the second step, blasting, after the workers place the explosive in the wall, they lock the explosive in place by burying it in dirt. Then, they stand back for the "show". Once blasting has taken place, the third step is initiated, lifting. This is where the workers shovel up the coal and fill them up into baskets. As soon as lifting has been completed, the fourth step, loading, takes place. Here, the workers take the baskets and load the coal collected onto a rail track. Once this final step is completed, stage 1 is finally over.