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Mining DocExplainer
Added: May 21, 20252025-05-21T13:24:17-04:00 2025-05-21T13:24:17-04:00In: Mining Operations

How do mechanical cutters improve excavation speed in mining?

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Mechanical cutters significantly impact mining speed by enabling continuous excavation, unlike the cyclical drill and blast method. This continuity reduces downtime associated with blasting, ventilation, and support installation, leading to faster advance rates (Knights et al., 2006).

Various mechanical cutters are employed, including continuous miners for soft rocks like coal, achieving high production rates (Singh et al., 2024).

Roadheaders are used for soft to medium-hard rock in tunneling and mine development. Surface miners excavate near-surface deposits in soft to medium-hard rock.

Tunnel boring machines (TBMs) are known for rapid excavation in long tunnels, especially in favorable ground conditions.

The speed of mechanical cutters is influenced by rock properties such as strength and abrasiveness, machine parameters like power and cutterhead design, and operational factors including cutting depth and speed (Inside Mines).

Case studies, such as the Bolter Miner Rapid Excavation Technology (BMRET) in the Menkeqing Coal Mine, demonstrate significantly increased excavation speeds compared to traditional methods (MDPI, 2020).

What factors do you think influence how fast a mechanical cutter can excavate rock? Share your thoughts!

References:
Knights, P., Stewart, P., & Ramezanzadeh, A. (2006). Benchmark drill and blast and mechanical excavation advance rates for underground hard-rock mine development. ((https://www.researchgate.net/profile/P_Knights/publication/43460983_Benchmark_drill_and_blast_and_mechanical_excavation_advance_rates_for_underground_hard-rock_mine_development/links/5508c5c90cf26ff55f83c6c3.pdf))
Singh, A. K., Kumar, A., Kumar, R., & Kumar, N. (Unknown). Success Story of Continuous Miner Technology Below Easily Caveable Roof. ((https://www.researchgate.net/publication/385893732_Success_Story_of_Continuous_Miner_Technology_Below_Easily_Caveable_Roof))
Colorado School of Mines. (Unknown). Performance Prediction of Mechanical Excavators. https://inside.mines.edu/UserFiles/File/earthMechanics/performance_prediction_of_mechanical_excavators/performance_prediction4.pdf
MDPI. (2020). Application of Bolter Miner Rapid Excavation Technology in Deep Underground Roadway in Inner Mongolia: A Case Study. https://www.mdpi.com/2071-1050/12/7/2588
Video rights: @SimexIt (YouTube)
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