What is Miner?

Legal Definition
A miner is a person who extracts ore, coal, or other mineral from the earth through mining. There are two senses in which the term is used. In its narrowest sense, a miner is someone who works at the rock face; cutting, blasting, or otherwise working and removing the rock. In a broader sense, a "miner" is anyone working within a mine, not just a worker at the rock face. This article will consider this broader concept.

Mining is one of the most dangerous trades in the world. in some countries, miners lack social guarantees and in case of injury may be left to cope without assistance.

In regions with a long mining tradition, many communities have developed cultural traditions and aspects specific to the various regions, in the forms of particular equipment, symbolism, music, and the like.
-- Wikipedia
Legal Definition
One who mines; a digger for metals and other minerals. While men of scientific attainments or of experience in the use of machinery, are to be found in this class, yet the word by which the class is designated imports neither learning nor skill. Watson v. Lederer, 11 Co.lo. 577, 19 Pac. 604, 1 L. R. A. 854, 7 Am. St Rep. 263.
-- Black's Law Dictionary