The extraction, processing, trade, and use of natural stone have been a part of human activity since ancient times and are integral to the history of human civilization. With the rise of emerging economies like China in the 1990s, the construction and decoration stone industry has seen rapid growth.
Projected Growth and Demand
The World Association of Architectural Decoration predicts that by 2025, the global annual consumption of natural stone will reach 4 billion square meters, with marble accounting for 40%, granite 50%, and other types such as sandstone, slate, basalt, limestone, and agate making up the remainder. China's rapid economic development over the past three decades has significantly increased the demand for natural stone, positioning it as the world's most important producer and seller of stone.
Global Stone Industry Development
The robust demand has spurred the development of the global stone industry. Traditional stone-producing countries like Italy and Spain are experiencing a decline in production due to resource depletion and environmental pressures. Meanwhile, countries such as Turkey, Brazil, Iran, India, and Egypt are rapidly growing in natural stone extraction. The center of global stone production and processing is shifting from Europe to China in Asia.
Innovations in Stone Quarrying
The modernization of stone mining and processing in China, marked by the adoption of Italian wire saw machines at the Hubei Da Hua Green Stone Mine, has evolved through introduction, learning, imitation, innovation, and sublimation to a leading position.
Chinese-made stone machinery, known for its economic, practical, and efficient performance, is popular worldwide. China's stone quarrying technology, safety, environmental standards, and production scale have surpassed those of traditional Western stone-producing countries.
Differences in Stone Mining
Stone mining differs essentially from other types of mining. The goal of stone mining is to extract large blocks of rough stone, whereas other minerals are mined to extract the smallest possible amount of effective minerals. Therefore, the mining model for decorative stone mines is unique and must consider the length, width, depth, and orientation of the ore body, as well as the conditions of the surrounding rock.
Traditional and Modern Mining Techniques
Combining traditional mining methods with modern technology achieves the most suitable mining method. This article shares practical experiences and insights on common mining methods, aiming to summarize various mining techniques and encourage collective development.
Upcoming Topics
Further discussions will be provided on stone quarry design, mining area demarcation, resource assessment, rough stone mining technology, wire saw cutting methods, drilling equipment and techniques for stone mining, and the comprehensive utilization of stone mine resources.
Classification of Stone Mines
Stone mines can be classified in various ways, such as low benches (around 2 meters for quarry saws), medium benches (around 4 meters for chain saws), and high benches (6-8 meters for wire saw machines). There are also three main types of open-pit mining: hillside, flat ground, and underground.
Mining Process
The mining process includes six main procedures: stripping, separation, disintegration, shaping, loading and transportation, and waste removal.
Technological Advancements
With the extensive use of new technologies and equipment, traditional mining methods for marble, granite, sandstone, and slate have blurred lines, and the best method is one that efficiently and cost-effectively extracts rough stone.
Traditional Mining Methods
Traditional methods, primarily manual, are well-suited for mines with good splitting properties, complete ore bodies, or obvious layering. These methods involve fire burning, drilling, and splitting, combined with controlled blasting techniques.
Diamond Bead Wire Saw Full Cutting Mining
This method uses a diamond bead wire saw for all separation, disintegration, and shaping of the rough stone. If the cost of mining is acceptable, this is currently the best method for fully mechanized mining, suitable for various patterns, especially marble mines with well-developed fractures.
Combination of Disc Saw and Bead Wire Saw Mining
This method combines the advantages of both disc saws and bead wire saws for efficient and resource-saving mining, applicable to various types of stone mining.
Conclusion
The classification, methods, and technological advancements in stone mining are continuously evolving. The goal is to achieve efficient, safe, and environmentally friendly mining practices that meet the growing global demand for natural stone.
