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DGMS Mines Act 1952 PDF Download | Indian Minerology

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DGMS Mines Act 1952 PDF Download | Indian Minerology DGMS Mines Act 1952 – PDF Download (Complete Guide) The Mines Act, 1952 is the primary mining legislation in India, enforced by the Directorate General of Mines Safety (DGMS) . This Act ensures the safety, health, and welfare of persons employed in mines. 📘 What is DGMS Mines Act? The Mines Act, 1952 lays down legal provisions related to working conditions, safety measures, inspection powers, and responsibilities of mine owners, agents, and managers. Applicable to Coal, Metalliferous & Oil Mines Mandatory for DGMS exams Foundation of all mining regulations ⚖️ Objectives of Mines Act 1952 Prevent mining accidents Ensure safe working environment Protect mine workers’ rights Define DGMS inspector powers 👷 Who Should Study This Act? Mining Engineering Students Mine Managers & Agents Overman & Sirdar Candidates Safety Officers DGMS Exam Aspirants 📥 DGMS Mines Act 1...
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Cost per Tonne Calculation in Opencast Mine (With Formula & Example) | Indian Minerology

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Cost per Tonne Calculation in Opencast Mine



Cost per tonne calculation is one of the most important parameters in opencast mining. It helps mine management to evaluate profitability, control expenses, and improve operational efficiency.

What is Cost per Tonne in Mining?

Cost per tonne is the total cost incurred to produce one tonne of coal, ore, or overburden. It includes operating cost, maintenance cost, manpower cost, fuel cost, and overheads.

Why Cost per Tonne is Important?

  • Measures mine profitability
  • Helps in cost control
  • Used for tender & contract evaluation
  • Important for budgeting & planning

Major Cost Components in Opencast Mine

1. Operating Cost

  • Fuel cost
  • Lubricants
  • Power cost
  • Tyres

2. Maintenance Cost

  • Spare parts
  • Workshop cost
  • Breakdown repairs

3. Manpower Cost

  • Operators & helpers
  • Supervisors
  • Technical staff

4. Administrative & Overhead Cost

  • Office expenses
  • Safety & training
  • Royalty & statutory charges

Cost per Tonne Formula

Cost per Tonne = Total Operating Cost / Total Production (tonnes)

Example Calculation

Monthly Operating Cost = ₹3,00,00,000
Monthly Production = 5,00,000 tonnes

Cost per Tonne = 3,00,00,000 / 5,00,000 = ₹600 per tonne

Machine-wise Cost Contribution

  • Dump Truck: 35–40%
  • Hydraulic Shovel/Excavator: 25–30%
  • Drilling & Blasting: 10–15%
  • Others: 15–20%

Fuel Cost Impact on Cost per Tonne

Fuel cost alone can contribute 30–40% of total mining cost. Even a 5% reduction in fuel consumption can save crores annually.

Methods to Reduce Cost per Tonne

  • Proper shovel–dumper matching
  • Improving haul road condition
  • Reducing idle time
  • Preventive maintenance
  • Operator skill improvement
  • Use of electric mining machinery

Cost per Tonne for Different Mines (Indicative)

  • Coal Opencast Mine: ₹500 – ₹1200/tonne
  • Iron Ore Mine: ₹700 – ₹1500/tonne
  • Limestone Mine: ₹400 – ₹900/tonne

Frequently Asked Questions (FAQs)

Q1. What is a good cost per tonne in opencast mining?

Lower cost per tonne compared to industry average is considered good, but it depends on stripping ratio and mine conditions.

Q2. How can cost per tonne be reduced?

By improving productivity, reducing fuel consumption, and minimizing equipment downtime.

Conclusion

Cost per tonne is the most critical performance indicator of any mine. Regular monitoring and optimization are essential for sustainable and profitable mining operations.


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