Assessor Resource

RIIBHD305D
Conduct down-hole hammer drilling

Assessment tool

Version 1.0
Issue Date: March 2024


This unit describes a participant’s skills and knowledge required to conduct down-hole hammer drilling in Drilling.

This unit is appropriate for those working in operational roles for down-hole hammer drilling.

Licensing, legislative, regulatory and certification requirements that apply to this unit can vary between states, territories, and Industry sectors. Relevant information must be sourced prior to application of the unit.

You may want to include more information here about the target group and the purpose of the assessments (eg formative, summative, recognition)



Evidence Required

List the assessment methods to be used and the context and resources required for assessment. Copy and paste the relevant sections from the evidence guide below and then re-write these in plain English.

1. Plan and prepare for down-hole hammer drilling

1.1 Access, interpret and apply drilling documentation and ensure the work activity is compliant

1.2 Obtain, confirm, clarify, confirm and apply work instructions

1.3 Identify, manage and report verbally or in writing all potential hazards and risks

1.4 Resolve coordination requirements with others prior to commencing and during work activities

1.5 Select and wear correct personal protective equipment, tools and equipment to carry out tasks, check for serviceability and rectify or report any faults

1.6 Check restraining devices on all pressure hoses

1.7 Fit/replace restraining devices on pressure hoses

1.8 Raise alarm/report as required

2. Operate down hole hammer drill

2.1 Select appropriate rod type, thread form and drill string components for job

2.2 Measure and select appropriate bit for the job

2.3 Correctly collar hole

2.4 Use rod handling equipment safely and correctly

2.5 Add/break out and remove drill rods/pipes and down hole equipment

2.6 Weight/feed/rotate drill at right rate for optimum penetration

2.7 Adjust air pressure to achieve required hole clearance

2.8 Measure line string and calculate depth of hole

3. Use drilling fluids

3.1 Identify hole conditions, assess requirements of dust control fluids

3.2 Select suitable ingredients/fluids

3.3 Prepare/monitor the preparation of required fluids

3.4 Use dust control fluids to achieve required result

4. Maintain equipment

4.1 Monitor equipment wear

4.2 Check all equipment and hoses

4.3 Disassemble, inspect and reassemble down hole hammers

4.4 Replace/adjust and report damaged/worn parts

4.5 Undertake bit sharpening

5. Respond to problems

5.1 Monitor operation and chips/sample/air return

5.2 Identify possible problems in equipment or process

5.3 Clear blockages safely

5.4 Determine other problems and maintenance tasks needing action

5.5 Determine possible fault causes

5.6 Rectify problem using appropriate solution within area of responsibility

5.7 Follow through items initiated until final resolution has occurred

5.8 Verbally or in writing report problems outside area of responsibility to designated person

Evidence is required to be collected that demonstrates a candidate’s competency in this unit. Evidence must be relevant to the roles within this sector’s work operations and satisfy all of the requirements of the performance criteria of this unit and include evidence that the candidate:

locates and applies relevant legislation, documentation, policies and procedures

works effectively with others to undertake and complete conducting of down-hole hammer drilling that meets all of the required outcomes including:

uses a range of communication techniques and strategies to communicate and coordinate information and activity to other

communicates the hazards of cuttings in the return air stream to all crew members

demonstrates completion of conducting down-hole hammer drilling that safely, effectively and efficiently meets all of the required outcomes on more than one (1) occasion including:

correctly use the various rod/pipe handling equipment

correctly and competently add/remove rods/pipe from the string

correctly applies rotation speed and weight on the bit to maintain optimum performance

correctly measures line string components and calculate hole depth

correctly collars holes

ensure that samples are monitored for sample quality, correctly collected and handled

ensure that all string components are correctly maintained

disassembles, describes the function of components, inspect components, replace unserviceable parts and reassemble a DTH hammer

ensures that drill pipe is inspected regularly and wear rates monitored

ensure that threads are inspected and maintained

ensuring that bit sharpening equipment, used to sharpen TC bits are used correctly and safely and that bits are sharpened to correct tolerances

The candidate must demonstrate knowledge of conducting down-hole hammer drilling through:

the critical need to match like threads with like threads on all tubular components and make up torque requirements

the parameters relating to wear of drill pipe and integrity of threads

the function of hole collaring

the methods required to limit the contamination of samples

the theory behind TC bit sharpening

correct bit selection for different types of drilling and different ground conditions

identifying problems related to inaccurate measurement of bits and other related components

the importance of monitoring sample quantity

the role that blockages play in affecting sample quality

methods commonly used to clear down hole blockages in air drilled holes and the hazards associated with clearing blockages

methods used to clear a blockage in a sample delivery hose and the hazards associated with clearing blockages

the critical need for restraining devices to be fitted to all pressure delivery hoses and sample delivery hoses, the devices available and their methods of attachment

dangers of drilled samples being returned to the surface at high velocity in air drilling operations and the parameters involved

the importance of checking gauges and monitoring pressures, flow rates and temperatures

An assessor of this unit must satisfy the requirements of the NVR/AQTF or their successors; and Industry regulations for certification and licensing: and,

this unit must be assessed in the context of this sector’s work environment; and,

this unit must be assessed in compliance with relevant legislation/regulation and using policies, procedures, processes and operational manuals directly related to the industry sector for which it is being assessed; and,

assessment may be conducted in conjunction with the assessment of other Units of Competency; and,

assessment must confirm consistent performance can be applied in a range of relevant workplace circumstances; and,

assessors must demonstrate the performance evidence, and knowledge evidence as outlined in this Unit of Competency, and through the minimum years of current* work experience specified below in an Industry sector relevant to the outcomes of the unit; or,

where the assessor does not meet experience requirements a co-assessment or partnership arrangement must exist between the qualified assessor and an Industry subject matter expert. The Industry subject matter expert should hold the unit being assessed (or an equivalent unit) and/or demonstrate equivalence of skills and knowledge at the unit level. An Industry technical expert must also demonstrate skills and knowledge from the minimum years of current work experience specified below in the Industry sector, including time spent in roles related to the unit being assessed; and,

assessor and Industry subject matter expert requirements differ depending on the Australian Qualifications Framework Level (AQF) of the qualification being assessed and/or Industry Sector as follows:

Industry sector

AQF** Level

Required assessor or Industry subject matter expert experience

Drilling, Metalliferous Mining, Coal Mining, Extractive (Quarrying) and Civil Construction

1

1 Year

2

2 Years

Drilling, Coal Mining and Extractive (Quarrying)

3-6

3 Years

Metalliferous Mining and Civil Construction

3-6

5 Years

Other sectors

Where this Unit is being assessed outside of the Resources and Infrastructure Sectors assessor and/or Industry subject matter expert experience should be in-line with industry standards for the sector in which it is being assessed and where no Industry standard is specified should comply with any relevant regulation.

*Assessors can demonstrate current work experience through employment within Industry in a role relevant to the outcomes of the Unit; or, for external assessors this can be demonstrated through exposure to Industry by conducting frequent site assessments across various locations.

**Where a unit is being delivered outside of a Qualification the first numeric character in the Unit code should be considered to indicate the AQF level


Submission Requirements

List each assessment task's title, type (eg project, observation/demonstration, essay, assingnment, checklist) and due date here

Assessment task 1: [title]      Due date:

(add new lines for each of the assessment tasks)


Assessment Tasks

Copy and paste from the following data to produce each assessment task. Write these in plain English and spell out how, when and where the task is to be carried out, under what conditions, and what resources are needed. Include guidelines about how well the candidate has to perform a task for it to be judged satisfactory.

1. Plan and prepare for down-hole hammer drilling

1.1 Access, interpret and apply drilling documentation and ensure the work activity is compliant

1.2 Obtain, confirm, clarify, confirm and apply work instructions

1.3 Identify, manage and report verbally or in writing all potential hazards and risks

1.4 Resolve coordination requirements with others prior to commencing and during work activities

1.5 Select and wear correct personal protective equipment, tools and equipment to carry out tasks, check for serviceability and rectify or report any faults

1.6 Check restraining devices on all pressure hoses

1.7 Fit/replace restraining devices on pressure hoses

1.8 Raise alarm/report as required

2. Operate down hole hammer drill

2.1 Select appropriate rod type, thread form and drill string components for job

2.2 Measure and select appropriate bit for the job

2.3 Correctly collar hole

2.4 Use rod handling equipment safely and correctly

2.5 Add/break out and remove drill rods/pipes and down hole equipment

2.6 Weight/feed/rotate drill at right rate for optimum penetration

2.7 Adjust air pressure to achieve required hole clearance

2.8 Measure line string and calculate depth of hole

3. Use drilling fluids

3.1 Identify hole conditions, assess requirements of dust control fluids

3.2 Select suitable ingredients/fluids

3.3 Prepare/monitor the preparation of required fluids

3.4 Use dust control fluids to achieve required result

4. Maintain equipment

4.1 Monitor equipment wear

4.2 Check all equipment and hoses

4.3 Disassemble, inspect and reassemble down hole hammers

4.4 Replace/adjust and report damaged/worn parts

4.5 Undertake bit sharpening

5. Respond to problems

5.1 Monitor operation and chips/sample/air return

5.2 Identify possible problems in equipment or process

5.3 Clear blockages safely

5.4 Determine other problems and maintenance tasks needing action

5.5 Determine possible fault causes

5.6 Rectify problem using appropriate solution within area of responsibility

5.7 Follow through items initiated until final resolution has occurred

5.8 Verbally or in writing report problems outside area of responsibility to designated person

Evidence is required to be collected that demonstrates a candidate’s competency in this unit. Evidence must be relevant to the roles within this sector’s work operations and satisfy all of the requirements of the performance criteria of this unit and include evidence that the candidate:

locates and applies relevant legislation, documentation, policies and procedures

works effectively with others to undertake and complete conducting of down-hole hammer drilling that meets all of the required outcomes including:

uses a range of communication techniques and strategies to communicate and coordinate information and activity to other

communicates the hazards of cuttings in the return air stream to all crew members

demonstrates completion of conducting down-hole hammer drilling that safely, effectively and efficiently meets all of the required outcomes on more than one (1) occasion including:

correctly use the various rod/pipe handling equipment

correctly and competently add/remove rods/pipe from the string

correctly applies rotation speed and weight on the bit to maintain optimum performance

correctly measures line string components and calculate hole depth

correctly collars holes

ensure that samples are monitored for sample quality, correctly collected and handled

ensure that all string components are correctly maintained

disassembles, describes the function of components, inspect components, replace unserviceable parts and reassemble a DTH hammer

ensures that drill pipe is inspected regularly and wear rates monitored

ensure that threads are inspected and maintained

ensuring that bit sharpening equipment, used to sharpen TC bits are used correctly and safely and that bits are sharpened to correct tolerances

The candidate must demonstrate knowledge of conducting down-hole hammer drilling through:

the critical need to match like threads with like threads on all tubular components and make up torque requirements

the parameters relating to wear of drill pipe and integrity of threads

the function of hole collaring

the methods required to limit the contamination of samples

the theory behind TC bit sharpening

correct bit selection for different types of drilling and different ground conditions

identifying problems related to inaccurate measurement of bits and other related components

the importance of monitoring sample quantity

the role that blockages play in affecting sample quality

methods commonly used to clear down hole blockages in air drilled holes and the hazards associated with clearing blockages

methods used to clear a blockage in a sample delivery hose and the hazards associated with clearing blockages

the critical need for restraining devices to be fitted to all pressure delivery hoses and sample delivery hoses, the devices available and their methods of attachment

dangers of drilled samples being returned to the surface at high velocity in air drilling operations and the parameters involved

the importance of checking gauges and monitoring pressures, flow rates and temperatures

An assessor of this unit must satisfy the requirements of the NVR/AQTF or their successors; and Industry regulations for certification and licensing: and,

this unit must be assessed in the context of this sector’s work environment; and,

this unit must be assessed in compliance with relevant legislation/regulation and using policies, procedures, processes and operational manuals directly related to the industry sector for which it is being assessed; and,

assessment may be conducted in conjunction with the assessment of other Units of Competency; and,

assessment must confirm consistent performance can be applied in a range of relevant workplace circumstances; and,

assessors must demonstrate the performance evidence, and knowledge evidence as outlined in this Unit of Competency, and through the minimum years of current* work experience specified below in an Industry sector relevant to the outcomes of the unit; or,

where the assessor does not meet experience requirements a co-assessment or partnership arrangement must exist between the qualified assessor and an Industry subject matter expert. The Industry subject matter expert should hold the unit being assessed (or an equivalent unit) and/or demonstrate equivalence of skills and knowledge at the unit level. An Industry technical expert must also demonstrate skills and knowledge from the minimum years of current work experience specified below in the Industry sector, including time spent in roles related to the unit being assessed; and,

assessor and Industry subject matter expert requirements differ depending on the Australian Qualifications Framework Level (AQF) of the qualification being assessed and/or Industry Sector as follows:

Industry sector

AQF** Level

Required assessor or Industry subject matter expert experience

Drilling, Metalliferous Mining, Coal Mining, Extractive (Quarrying) and Civil Construction

1

1 Year

2

2 Years

Drilling, Coal Mining and Extractive (Quarrying)

3-6

3 Years

Metalliferous Mining and Civil Construction

3-6

5 Years

Other sectors

Where this Unit is being assessed outside of the Resources and Infrastructure Sectors assessor and/or Industry subject matter expert experience should be in-line with industry standards for the sector in which it is being assessed and where no Industry standard is specified should comply with any relevant regulation.

*Assessors can demonstrate current work experience through employment within Industry in a role relevant to the outcomes of the Unit; or, for external assessors this can be demonstrated through exposure to Industry by conducting frequent site assessments across various locations.

**Where a unit is being delivered outside of a Qualification the first numeric character in the Unit code should be considered to indicate the AQF level

Copy and paste from the following performance criteria to create an observation checklist for each task. When you have finished writing your assessment tool every one of these must have been addressed, preferably several times in a variety of contexts. To ensure this occurs download the assessment matrix for the unit; enter each assessment task as a column header and place check marks against each performance criteria that task addresses.

Observation Checklist

Tasks to be observed according to workplace/college/TAFE policy and procedures, relevant legislation and Codes of Practice Yes No Comments/feedback
Access, interpret and apply drilling documentation and ensure the work activity is compliant 
Obtain, confirm, clarify, confirm and apply work instructions 
Identify, manage and report verbally or in writing all potential hazards and risks 
Resolve coordination requirements with others prior to commencing and during work activities 
Select and wear correct personal protective equipment, tools and equipment to carry out tasks, check for serviceability and rectify or report any faults 
Check restraining devices on all pressure hoses 
Fit/replace restraining devices on pressure hoses 
Raise alarm/report as required 
Select appropriate rod type, thread form and drill string components for job 
Measure and select appropriate bit for the job 
Correctly collar hole 
Use rod handling equipment safely and correctly 
Add/break out and remove drill rods/pipes and down hole equipment 
Weight/feed/rotate drill at right rate for optimum penetration 
Adjust air pressure to achieve required hole clearance 
Measure line string and calculate depth of hole 
Identify hole conditions, assess requirements of dust control fluids 
Select suitable ingredients/fluids 
Prepare/monitor the preparation of required fluids 
Use dust control fluids to achieve required result 
Monitor equipment wear 
Check all equipment and hoses 
Disassemble, inspect and reassemble down hole hammers 
Replace/adjust and report damaged/worn parts 
Undertake bit sharpening 
Monitor operation and chips/sample/air return 
Identify possible problems in equipment or process 
Clear blockages safely 
Determine other problems and maintenance tasks needing action 
Determine possible fault causes 
Rectify problem using appropriate solution within area of responsibility 
Follow through items initiated until final resolution has occurred 
Verbally or in writing report problems outside area of responsibility to designated person 
Access, interpret and apply drilling documentation and ensure the work activity is compliant 
Obtain, confirm, clarify, confirm and apply work instructions 
Identify, manage and report verbally or in writing all potential hazards and risks 
Resolve coordination requirements with others prior to commencing and during work activities 
Select and wear correct personal protective equipment, tools and equipment to carry out tasks, check for serviceability and rectify or report any faults 
Check restraining devices on all pressure hoses 
Fit/replace restraining devices on pressure hoses 
Raise alarm/report as required 
Select appropriate rod type, thread form and drill string components for job 
Measure and select appropriate bit for the job 
Correctly collar hole 
Use rod handling equipment safely and correctly 
Add/break out and remove drill rods/pipes and down hole equipment 
Weight/feed/rotate drill at right rate for optimum penetration 
Adjust air pressure to achieve required hole clearance 
Measure line string and calculate depth of hole 
Identify hole conditions, assess requirements of dust control fluids 
Select suitable ingredients/fluids 
Prepare/monitor the preparation of required fluids 
Use dust control fluids to achieve required result 
Monitor equipment wear 
Check all equipment and hoses 
Disassemble, inspect and reassemble down hole hammers 
Replace/adjust and report damaged/worn parts 
Undertake bit sharpening 
Monitor operation and chips/sample/air return 
Identify possible problems in equipment or process 
Clear blockages safely 
Determine other problems and maintenance tasks needing action 
Determine possible fault causes 
Rectify problem using appropriate solution within area of responsibility 
Follow through items initiated until final resolution has occurred 
Verbally or in writing report problems outside area of responsibility to designated person 

Forms

Assessment Cover Sheet

RIIBHD305D - Conduct down-hole hammer drilling
Assessment task 1: [title]

Student name:

Student ID:

I declare that the assessment tasks submitted for this unit are my own work.

Student signature:

Result: Competent Not yet competent

Feedback to student

 

 

 

 

 

 

 

 

Assessor name:

Signature:

Date:


Assessment Record Sheet

RIIBHD305D - Conduct down-hole hammer drilling

Student name:

Student ID:

Assessment task 1: [title] Result: Competent Not yet competent

(add lines for each task)

Feedback to student:

 

 

 

 

 

 

 

 

Overall assessment result: Competent Not yet competent

Assessor name:

Signature:

Date:

Student signature:

Date: