Definition
The process or business of extracting valuable metals or minerals from the earth, whether in their native state or as ores. In legal contexts, mining refers principally to the working of deposits of precious or base metals, coal, and similar mineral substances through excavation, tunneling, or related subsurface operations. The term carries distinct legal significance in property law, regulatory law, and federal public lands law, where it defines the scope of mineral rights, triggers specific statutory regimes, and determines what activities qualify for particular legal protections or entitlements.
Common Language
Modern common usage (Wiktionary): The activity of removing valuable resources (often minerals) from the earth; also used broadly for any activity that extracts or undermines, for the placement of explosive mines, and for the creation of cryptocurrency by validating transactions.
Historical common usage (Webster's 1913): The act or business of making mines or of working them.
The legal meaning of mining is narrower than modern common usage suggests. Cryptocurrency "mining" and data mining have no bearing on any legal definition. More importantly, the legal term carries an exclusionary boundary: operations that extract rock, marble, slate, or similar materials by quarrying, and operations that sink wells for oil or water, have historically been treated as legally distinct from mining even though the lay understanding of "extracting things from the earth" would cover them. A researcher applying the ordinary English sense of the word risks reading sources too broadly.
Common Confusion
Mining is frequently conflated with quarrying and drilling. Black's 2nd Edition is explicit that the term as ordinarily used does not include the extraction of rock, marble, or slate (described as quarrying), though coal and salt are mined. Well-sinking for oil, gas, or water sits in a separate legal category. This distinction matters because different common law doctrines, statutes, and regulatory regimes govern each activity. In public lands law, the General Mining Law of 1872 governs locatable minerals but does not cover oil and gas (governed by the Mineral Leasing Act of 1920) or common varieties of stone and gravel. Researchers should not assume that a legal rule about "mining" extends automatically to quarrying operations or well-drilling, and vice versa.
Why It Matters in Research
The legal content of "mining" shifts significantly depending on the source and era being consulted. In 19th-century American public lands cases and statutes, mining almost always means hard-rock metal mining — the gold, silver, and copper extraction that drove Western settlement. That context shapes the entire body of federal mining law and the customs that became codified law. Coal mining entered a distinct regulatory stream, particularly after the early 20th century, with its own safety statutes and labor law history. Oil and gas, though often grouped colloquially with mining, diverged early into a separate legal universe.
Researchers working in property law should note that the severance of mineral rights from surface rights — and the question of what a "mineral rights" deed actually conveys — turns heavily on how courts define mining in a given jurisdiction. A deed conveying "mining rights" may or may not include coal, oil, gas, or quarry stone depending on local precedent.
In regulatory research, the shift from the 1872 General Mining Law framework toward environmental and reclamation requirements in the late 20th century (Surface Mining Control and Reclamation Act of 1977 for coal; various state hard-rock reclamation statutes) marks a significant doctrinal break. Sources predating that shift describe a largely self-regulatory industry; post-1977 sources describe a heavily regulated one. Historical secondary sources may present the law as it stood before these reforms without flagging the change.
The corpus also contains significant labor law material tied to mining — particularly coal mining — including union recognition disputes, company town cases, and occupational safety litigation. These sources use "mining" in the coal-specific sense and may not be generalizable to metal mining contexts.
Historical Dictionary Support
Black's 2nd Edition defines mining as "the process or business of extracting from the earth the precious or valuable metals, either in their native state or in their ores," citing In re Rollins Gold Min. Co., 102 Fed. 985. The definition is anchored in metal extraction — a reflection of the period when the most legally contested mining activity involved gold and silver claims in the American West.
The entry's explicit exclusions are as instructive as the definition itself. Black's notes that quarrying (rock, marble, slate) falls outside the ordinary meaning, while coal and salt mining fall within it. Well-sinking is excluded. This carve-out structure reveals that the term was understood functionally, not purely by reference to subsurface extraction as such, but by the industry and product involved.
What historical dictionaries largely miss is the regulatory dimension that came to dominate 20th-century mining law. Black's 2nd Edition definition is essentially a property and commercial law definition — it tells you what activities constitute mining for purposes of identifying rights and business characterization, but it does not anticipate the administrative, environmental, and labor law frameworks that would come to define the field. Researchers should treat the historical dictionary definition as a starting point for property and common law questions, not as a guide to statutory interpretation under modern regimes.
Jurisdictional Note
Federal public lands law (primarily the General Mining Law of 1872 and its successors) governs mineral rights on federal lands and uses a specific statutory definition of locatable minerals that does not track the common law definition precisely. State law governs mineral rights on private land, and state courts have reached different conclusions about what substances fall within a conveyance of "mining rights" or "mineral rights." Western states generally have more developed mining law doctrine than Eastern states, owing to historical patterns of resource extraction.
Encyclopedia Cross-Reference
See Law Mind Encyclopedia: Mineral Rights; Public Lands Law; Surface Mining and Reclamation.