The Benefits of Using Drilling Rigs&Tools For Sale

Grade Control (GC) drilling, often performed by specialized GC rigs, is a critical process in modern mining operations. It plays a pivotal role in optimizing ore extraction and ensuring the economic viability of mining projects. This article delves into what GC rigs are, how grade control drilling works, and its significance in the mining industry.

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What is Grade Control Drilling?

Grade control drilling is a geological research process that takes place just before the actual mining of an orebody. Its primary purpose is to precisely define the boundaries of ore and waste rock, and to determine the grade (concentration) of valuable minerals within the ore. This detailed information is crucial for making informed decisions about mine planning, blasting patterns, and ultimately, maximizing the recovery of valuable resources while minimizing the extraction of non-economic material.

The Role of GC Rigs

GC rigs are specialized drilling machines designed for grade control operations. They are typically highly mobile and capable of drilling numerous holes in close proximity, often within the ore body itself. These rigs are engineered to provide accurate and high-quality samples, which are essential for precise grade determination.

Many GC rigs utilize Reverse Circulation (RC) drilling techniques. RC drilling is known for its efficiency and ability to produce dry, uncontaminated samples, which is vital for accurate grade analysis.

How Grade Control Drilling Works

The process of grade control drilling involves several key steps:

1. Drilling: GC rigs drill a series of closely spaced holes within the target area. The depth and angle of these holes are precisely controlled to gather representative samples.

2. Sample Collection: As the drilling progresses, rock cuttings are brought to the surface. These cuttings are carefully collected and processed to obtain samples for analysis. "Drilling machinery provides the operator with real-time grade guidance while they are drilling. What this means is that they are given information about the desired depth, angle and alignments".

3. Sample Analysis: The collected samples are then sent to laboratories for geological analysis. Geologists assess the mineral content and determine the grade of the ore.

4. Data Interpretation and Mine Planning: Based on the laboratory results, detailed geological models are created. This information guides mine planners in defining ore and waste zones, optimizing blast designs, and scheduling the extraction of material. 

Benefits of Grade Control Drilling

Grade control drilling offers numerous benefits to mining operations:

• Optimized Ore Recovery: By accurately delineating ore and waste, grade control drilling minimizes dilution (unwanted waste rock mixed with ore) and maximizes the recovery of valuable minerals.

• Reduced Processing Costs: Separating high-grade ore from low-grade or waste material before processing reduces the amount of material that needs to be processed, leading to significant cost savings.

• Improved Mine Planning: Precise grade information allows for more efficient and effective mine planning, including optimized blasting, hauling, and processing strategies.

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• Enhanced Profitability: Ultimately, grade control drilling contributes to increased profitability by maximizing revenue from ore sales and minimizing operational costs.

• Environmental Responsibility: By optimizing resource extraction, grade control can also contribute to more responsible mining practices, reducing the overall environmental footprint.

Conclusion

CONVENTIONAL/WIRELINE CORE DRILLING

Bits/Core-barrels/ Casing Shoes

Conventional core drilling and wireline core drilling are two common methods used in geological exploration and mineral extraction, each with its own advantages and applications. METADRILL offers you both tooling and accessories as per below and not limited to:

Conventional

• T2-76 / T6-76
• T2-86 / T6-86
• T2-101 / T6-101
• T2-116 / T6-116

Wireline

• AWL / BWL / BWL3 /
• NWL / NWL3
• HWL / HWL3
• PWL /PWL3

TOP HAMMER BITS / CASING SHOES

Top hammer bits consist of a steel body with cemented carbide buttons or inserts on the face of the bit. These buttons are arranged in a pattern that maximizes the drilling efficiency and reduces wear on the bit. The carbide buttons are made from a tough and wear resistant material, which allows the bit to maintain its cutting performance for longer.

• 64mm (2 1/2″) T38 Retrac – Ballistic Inserts
• 76mm (3″) T38 Retrac Drop Centre – Ballistic Inserts
• 76mm (3″) T38 Standard – Domed Top Hammer Bit
• 89mm (3 1/2″) T38 Retrac Drop Centre – Domed
• 89mm (3 1/2″) T38 Retrac Drop Centre – Ballistic
• 89mm (3 1/2″) T38 Standard – Domed Top Hammer
• 102mm (4″) T51 Retrac Drop Centre Domed Top
• Hammer
• 102mm (4″) T51 Standard – Domed Top Hammer Bit
• 102mm (4″) T51 Standard – Drop Centre – Domed
• 102mm (4″) T51 Retrac Drop Centre – Ballistic Inserts
• 102mm (4″) T38 Standard – Ballistic Inserts
• 102mm (4″) T51 Retrac Drop Centre – Domed Inserts
• 88.9mm Top Hammer Casing Shoe – Chisel Type
• 88.9mm Top Hammer Casing Shoe – Button Type
• 102mm Top Hammer Casing Shoe – Button Type
• 102mm Top Hammer Casing Shoe – Chisel Type

PWF Long Standard / PWF Long Set to Liner

Stepped drag bits are a type of drill bit used for drilling holes in soft to medium-hard formations such as sandstone, shale, and clay. These bits are designed with a stepped profile, which means that they have different sizes of cutting elements placed at intervals along the length of the bit.

STEEL TOOTH TRICONE

Our Steel Tooth Tricone Bit models are designed with long “A” shaped teeth, widely spaced and fully hard faced from crest to root for maximum penetration rates in formations that range from moderately soft to medium soft.

FULL FACED PCD BITS

We offer a wide range of full-hole drill bits with polycrystalline diamond cutters (PCD). These span between small bits 3” diameter used in mines for drilling holes for roof-bolts to larger diameter bits used for horizontal drilling. All these bits have a full tungsten carbide matrix crown imparting a much superior wear resistance than equivalent steel-head bits.

PCD Coring

PCD (polycrystalline diamond) coring bits are a type of diamond drilling bit used in various industrial applications. These bits are made of a polycrystalline diamond layer that is bonded to a tungsten carbide substrate, providing high wear resistance and durability. We use these different types of barrels:

• T6-116 Standard / T6-116 Set to Liner
• T2-101 Standard / T2 -101 Set to Liner
• T6-101 Standard / T6-101 Set to Liner
• 412 Standard / 412 Set to Liner
• PWF Long Standard / PWF Long Set to Liner
• PWF Long Standard / PWF Long Set to Liner

DTH - DOWN THE HOLE

Our DTH system boasts advanced features that set it apart from the rest. With its state-of-the-art down-the-hole hammer technology, you can achieve faster and more accurate drilling operations, ensuring optimal penetration rates and reduced downtime. We use DTH from 2 ½ to 18inch drilling. Special sizes will be available upon request

DRILL RODS

We offer All types of drilling rods for conventional and wireline drilling. The exceptional durability of METADRILL WJ rod can be attributed to the high strength alloy teel and the superb plasma arcwelding process

ADAPTERS

Adapters are critical components of the drilling system and play a significant role in the overall drilling performance. The quality and compatibility of the adapter with the drilling rig and bit can have a significant impact on the drilling efficiency and accuracy.

MANUAL/AUTOMATIC SPT ASSEMBLIES

The Standard Penetration Test (SPT) assembly is a widely used in-situ testing method in geotechnical engineering to determine the geotechnical properties of soils at various depths below the ground surface.
METADRILL offers you both Manual Trip hammer or the Full Automatic SPT Assembly.

SAMPLING CONES/SPLIT TUBES

Sampling cones are specialized tools used in geotechnical and environmental drilling to gather soil or sediment.

These cones are typically attached to drilling equipment, such as cone penetration testing (CPT) or standard penetration testing (SPT) rigs.

Split tubes, also known as split spoon samplers or split core barrels, are widely used tools in soil sampling operations, particularly in geotechnical and environmental investigations.

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