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Questions and Answers
What is one requirement for blasting operations performed by contractors?
What is one requirement for blasting operations performed by contractors?
Who is responsible for prescribing the quantity and type of explosives for removal of boulders?
Who is responsible for prescribing the quantity and type of explosives for removal of boulders?
What is the role of Blasting Mates during blasting operations?
What is the role of Blasting Mates during blasting operations?
What type of codes provide safety guidelines for blasting and drilling operations?
What type of codes provide safety guidelines for blasting and drilling operations?
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What should be included in the special instructions drawn up for major works?
What should be included in the special instructions drawn up for major works?
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In what form can blasting works be carried out?
In what form can blasting works be carried out?
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What must be ensured if blasting work is done by contract?
What must be ensured if blasting work is done by contract?
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Which of the following is a mandatory requirement for explosives storage locations?
Which of the following is a mandatory requirement for explosives storage locations?
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What should be done with paper or fibrous material used in packing explosives after its initial use?
What should be done with paper or fibrous material used in packing explosives after its initial use?
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At what angle should the line of shavings or dry grass be placed in relation to the wind direction during the destruction of explosives?
At what angle should the line of shavings or dry grass be placed in relation to the wind direction during the destruction of explosives?
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How far should cartridges be placed from the weather end of the line of shavings during the destruction process?
How far should cartridges be placed from the weather end of the line of shavings during the destruction process?
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What precaution must be taken regarding the day conditions when destroying explosives?
What precaution must be taken regarding the day conditions when destroying explosives?
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What should be placed adjacent to the safety fuse to ensure ignition of the shavings during the destruction of explosives?
What should be placed adjacent to the safety fuse to ensure ignition of the shavings during the destruction of explosives?
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What is one of the purposes of blasting materials mentioned?
What is one of the purposes of blasting materials mentioned?
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Which item is NOT a type of blasting material listed?
Which item is NOT a type of blasting material listed?
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What is an important requirement for Assistant Engineers regarding explosives?
What is an important requirement for Assistant Engineers regarding explosives?
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What precaution must be taken before a blasting operation?
What precaution must be taken before a blasting operation?
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Which of the following is related to testing materials used for blasting?
Which of the following is related to testing materials used for blasting?
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Which procedure is essential for the safety of track and structures during blasting?
Which procedure is essential for the safety of track and structures during blasting?
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What is a requirement laid out for the custody and storage of explosives?
What is a requirement laid out for the custody and storage of explosives?
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What type of explosives is mentioned in the context of widening rock cuttings?
What type of explosives is mentioned in the context of widening rock cuttings?
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What should be included in the progress reports submitted by engineers?
What should be included in the progress reports submitted by engineers?
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What is a critical factor in the handling of explosives?
What is a critical factor in the handling of explosives?
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Who is responsible for ensuring compliance with the rules regarding the storage and use of explosives on works?
Who is responsible for ensuring compliance with the rules regarding the storage and use of explosives on works?
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What must a vehicle have if it is carrying explosives by road?
What must a vehicle have if it is carrying explosives by road?
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What distance should blasting operations normally be restricted to from a running railway line?
What distance should blasting operations normally be restricted to from a running railway line?
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What should be done to protect tracks within 60 metres of rock to be blasted?
What should be done to protect tracks within 60 metres of rock to be blasted?
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Who has the authority to inspect all magazines holding explosives?
Who has the authority to inspect all magazines holding explosives?
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What is required before conducting blasting operations without block protection?
What is required before conducting blasting operations without block protection?
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How long before a train is expected to pass is blasting prohibited?
How long before a train is expected to pass is blasting prohibited?
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What actions are staff expected to take during the inspections of explosives handling?
What actions are staff expected to take during the inspections of explosives handling?
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Which of the following is NOT mentioned as a responsibility of specific engineering roles?
Which of the following is NOT mentioned as a responsibility of specific engineering roles?
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The general rule for possession of explosives involves the need for what?
The general rule for possession of explosives involves the need for what?
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What must be done if a misfire occurs during blasting operations?
What must be done if a misfire occurs during blasting operations?
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What is the primary responsibility of the Official in-charge after a blast?
What is the primary responsibility of the Official in-charge after a blast?
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What distance must explosives be disposed of from buildings?
What distance must explosives be disposed of from buildings?
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How much explosives can be destroyed at one time?
How much explosives can be destroyed at one time?
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Which of the following is NOT a requirement for explosives disposal?
Which of the following is NOT a requirement for explosives disposal?
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What should be done if adjacent charges may have been affected by a misfire?
What should be done if adjacent charges may have been affected by a misfire?
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What must be the width and thickness of the dry grass line for disposal?
What must be the width and thickness of the dry grass line for disposal?
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During the use of electrical methods for firing charges, what is a potential risk?
During the use of electrical methods for firing charges, what is a potential risk?
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What should be included in the initial operation after a misfire occurs?
What should be included in the initial operation after a misfire occurs?
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What precaution should be taken when laying multiple explosive trains?
What precaution should be taken when laying multiple explosive trains?
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What should be done with shavings before the destruction of explosives?
What should be done with shavings before the destruction of explosives?
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Which method is prescribed for rendering black powder harmless?
Which method is prescribed for rendering black powder harmless?
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What is the maximum distance cartridges should be placed from the weather end of the line of shavings?
What is the maximum distance cartridges should be placed from the weather end of the line of shavings?
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What should be the angle of the line of materials used in packing explosives in relation to the wind direction?
What should be the angle of the line of materials used in packing explosives in relation to the wind direction?
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What can be used to enhance the ignition of shavings during the destruction of explosives?
What can be used to enhance the ignition of shavings during the destruction of explosives?
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What measures should be taken to ensure the safety of trains during blasting operations near a running railway line?
What measures should be taken to ensure the safety of trains during blasting operations near a running railway line?
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Which of the following roles is primarily responsible for ensuring compliance with the storage and use of explosives?
Which of the following roles is primarily responsible for ensuring compliance with the storage and use of explosives?
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What action is required when blasting occurs without block protection?
What action is required when blasting occurs without block protection?
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What should be done to tracks within 60 metres of the blasting site?
What should be done to tracks within 60 metres of the blasting site?
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How should explosives be handled if transporting them by road?
How should explosives be handled if transporting them by road?
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What should be ensured before any blasting operation is initiated?
What should be ensured before any blasting operation is initiated?
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What is the maximum time allowed before a train's arrival during which blasting operations should not take place?
What is the maximum time allowed before a train's arrival during which blasting operations should not take place?
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What happens if a misfire occurs during blasting operations?
What happens if a misfire occurs during blasting operations?
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What is the minimum distance that persons, except those light the fuses, must maintain during blasting operations?
What is the minimum distance that persons, except those light the fuses, must maintain during blasting operations?
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Which action must be taken if a charge supposedly misses fire?
Which action must be taken if a charge supposedly misses fire?
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What should be done after confirming that a misfire has occurred during blasting operations?
What should be done after confirming that a misfire has occurred during blasting operations?
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What should be the angle of boreholes drilled to control the blast and reduce damage to structures?
What should be the angle of boreholes drilled to control the blast and reduce damage to structures?
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What should be done to the work site following a blast?
What should be done to the work site following a blast?
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What is the maximum amount of explosives that can be disposed of at one time?
What is the maximum amount of explosives that can be disposed of at one time?
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What precaution should be exercised when using more than one blasting train?
What precaution should be exercised when using more than one blasting train?
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What precaution should an individual take regarding safety fuses and their ignition?
What precaution should an individual take regarding safety fuses and their ignition?
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What must be included in the area selected for disposing explosives?
What must be included in the area selected for disposing explosives?
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What must be marked if a charge has reportedly missed fire?
What must be marked if a charge has reportedly missed fire?
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What is the purpose of using only shallow bore-holes in blasting operations?
What is the purpose of using only shallow bore-holes in blasting operations?
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What should be done if a search reveals unexploded detonators in debris after a misfire?
What should be done if a search reveals unexploded detonators in debris after a misfire?
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What must be ensured regarding the carriers of explosives and detonators?
What must be ensured regarding the carriers of explosives and detonators?
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What is an essential safety consideration when using the electrical method of firing?
What is an essential safety consideration when using the electrical method of firing?
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Which of the following is an essential step to take before starting blasting operations?
Which of the following is an essential step to take before starting blasting operations?
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What width and thickness is required for the line of shavings or dry grass during the disposal of explosives?
What width and thickness is required for the line of shavings or dry grass during the disposal of explosives?
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What role does the person in charge of a blast have regarding the broken rock post-blasting?
What role does the person in charge of a blast have regarding the broken rock post-blasting?
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Which of the following is NOT mentioned as a protocol for the removal of misfired explosives?
Which of the following is NOT mentioned as a protocol for the removal of misfired explosives?
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What is a critical requirement for the safe destruction of explosives disposal sites?
What is a critical requirement for the safe destruction of explosives disposal sites?
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What should be verified before drilling a new hole after a misfire?
What should be verified before drilling a new hole after a misfire?
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What is the proper action to take if a misfire occurs and it is safe to do so?
What is the proper action to take if a misfire occurs and it is safe to do so?
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Why is it necessary for the Blasting Mate to keep a key to the exploder in his pocket?
Why is it necessary for the Blasting Mate to keep a key to the exploder in his pocket?
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What type of tools should be avoided when attempting to sludge out tamping from a misfire?
What type of tools should be avoided when attempting to sludge out tamping from a misfire?
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What action is prohibited within a distance of 300 mm of a misfired hole?
What action is prohibited within a distance of 300 mm of a misfired hole?
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What is a required safety measure when drilling new holes after a misfire?
What is a required safety measure when drilling new holes after a misfire?
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What should happen after a fresh hole is drilled to address a misfire?
What should happen after a fresh hole is drilled to address a misfire?
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How long should one wait before drilling a new hole after a misfire has occurred?
How long should one wait before drilling a new hole after a misfire has occurred?
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What is required for a new hole to be drilled in the presence of an authorized shot-firer?
What is required for a new hole to be drilled in the presence of an authorized shot-firer?
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What is NOT a recommended step after a misfire has occurred?
What is NOT a recommended step after a misfire has occurred?
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Study Notes
Storage and Use of Explosives
- General: The "Indian Explosive Act 1884", "BIS Codes", and Railway Administration/State Government instructions provide guidance on explosive use.
- Explosives Use: Explosives are used for various purposes on railways, including clearing boulders, quarrying, widening cuttings, deepening wells, rock cuttings, excavating foundations, and tunnel construction.
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Instructions on Use: Detailed instructions are mandatory for major works and should cover:
- Duties of Blasting Mates and other staff.
- Description of materials used (e.g. explosives, detonators, safety-fuses, blasting cables, joint adapters, fuse lighters, exploders, and crimpers).
- Collection and transport of materials.
- Testing of materials used for blasting.
- Procedure and methods of boring, charging holes, and blasting.
- Imposition and removal of traffic blocks.
- Safety distances.
- Protection of track and structures during blasting.
- Precautions before, during, and after blasting.
- Danger and all clear signals.
- Periodical progress reports.
- Custody and storage of explosives in magazines and their accountal.
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Observance of Rules:
- Explosive Possession: A license is required by the Explosive Rules.
- Responsibility: Divisional/Dy.Chief Engineer, Assistant Engineer, and Section Engineer (Works) ensure adherence to government and administration rules regarding explosive storage and use.
- Inspections: The Inspector of Explosives and District Magistrate have inspection powers over all magazines.
- Staff Awareness: Frequent checks ensure staff handling explosives understand the rules and modifications.
- Carriage of Explosives: The "I.R.C.A. Red Tariff No.16" outlines how explosive transport by rail must be done. Explosives transported by road must have a vehicle license.
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Protection to Trains and Railway Property:
- Blasting Near Railway Line: Blasting operations within 100 meters of a running line should typically be carried out under block protection. Tracks within 60 meters of blast sites are protected using old sleepers. The Permanent Way Inspector ensures train protection when blasting without a block.
- Misfired Charges: An Official in-charge is responsible for examining the blast site for misfired charges.
- Search for Unexploded Detonators: A careful search for unexploded detonators is crucial within debris.
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Misfires with Electrical Firing:
- Multiple Trains: If more than one train is laid with electrical firing, lay them at a distance to prevent unintentional detonation from heat.
-
Explosives Disposal:
- No Abandonment: Explosives should not be abandoned and are disposed of or destroyed according to approved methods. Manufacturers or the appropriate authority provide guidance.
- Safe Handling: Explosives, caps, boxes, liners, or packing material should not be left in areas accessible to children, unauthorized persons, or livestock.
- Paper Material Disposal: Paper or fibrous material used in explosive packing should be destroyed by burning under the supervision of a responsible person.
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Destruction of Explosives:
- Supervision: Assistant Engineer supervision is mandatory for all explosive destruction.
- Black Powder: Black powder is dissolved in water, preferably hot, to safely dispose of it.
- Dynamite and Similar Explosives: No more than 2.5 kg of explosives should be destroyed at a time. Destroy in a designated area at least 800 meters from buildings and dwellings.
- Destruction Method: A line of shavings or dry grass is laid, sprinkled with kerosene oil, and ignited using a safety fuse. Cartridges are placed in a continuous line, spaced from the shavings line, to ensure complete destruction.
Handling Explosives
- Explosives must be handled with extreme care: Possession and use of explosives requires licensing and strict adherence to rules and regulations.
- Responsibility for implementing safe practices: The Divisional/Dy.Chief Engineer, Assistant Engineer, and Section Engineer are responsible for ensuring that all staff working with explosives understand and follow the relevant rules and regulations.
- Inspectors have authority: The Inspector of Explosives and the District Magistrate have the authority to inspect all magazines (storage facilities for explosives).
- Frequent checks on staff knowledge: Frequent checks must be conducted to ensure that all staff understand the rules and regulations governing explosives.
Blasting Operations
- Safety for trains: All blasting operations within 100 meters of a running railway line should be performed under block protection. Tracks within 60 meters of the blasting area should be protected with old sleepers.
- Timing for blasting: When blasting is conducted without block protection, no blasting should be done within 30 minutes of a train's expected arrival time.
- Warning system: Before blasting commences, all personnel except those responsible for lighting the fuses must be warned by a signal (e.g., striking an empty tin or blowing a siren) and must stay at least 150 meters away.
- Protection of structures: Shallow boreholes and light charges should be used when blasting near structures, such as bridges and telegraph wires. The angle of boreholes can be adjusted to control the blast.
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Blasting mate responsibilities: The Blasting Mate is responsible for:
- Lighting fuses in the presence of other authorized personnel.
- Ensuring the number of shots fired matches the planned amount.
- Inspecting the work after blasting to ensure all holes have exploded and no unexploded cartridges remain.
Misfires:
-Safe distance: If a misfire is suspected, everyone must be warned and prevented from approaching the site. -Re-examination and re-wiring: The Blasting Mate should re-examine connections, check wiring, and re-wire if necessary. -Alternative firing: If the charge can’t be fired by electrical means, specific procedures for handling misfires outlined in paragraphs 82-84 of relevant regulations should be followed. -No manipulation: No person should attempt to bore out, withdraw, or tamper with a misfired hole or nearby holes. -Re-priming and firing: Tamping can be sludged out with compressed air or water but only under pressure.. The misfired hole should be re-primed and fired. -Drilling new holes: New holes should be drilled a minimum of 300mm (12 inches) away from the misfired hole, ensuring no contact with the remaining explosive. -Debris removal: Authorized shot-firers should supervise the removal of debris located within 2 meters of the misfired hole. -Careful search: Debris should be carefully searched for unexploded detonators and cartridges. -Adjacent charges: If a blast explodes a nearby charge that had not detonated, the blasting team must inspect the area to ensure no other charges have misfired.
Explosives Disposal
- No abandonment: Explosives must never be abandoned.
- Disposal methods: Explosives must be disposed of or destroyed according to approved methods. Manufacturers or relevant authorities should be consulted for guidance.
- Safe handling: Explosive components, including boxes, liners, and packing materials, should not be left in areas accessible to children, unauthorized personnel, or livestock.
- Disposal of packing materials: Paper or fibrous material used in packing explosives should not be reused and must be destroyed by burning in the presence of a responsible person.
Destruction of Explosives
- Assistant Engineer supervision: The destruction of explosives should always be supervised by the Assistant Engineer.
- Black powder destruction: Black powder should be thrown into water, preferably hot water, to dissolve the saltpetre and render the explosive harmless.
- Destruction of dynamite: Destruction of dynamite and similar explosives should be carried out in a designated area at least 800 meters away from buildings and dwelling places. No more than 2.5 kg of explosives should be destroyed at a time.
- Destructive procedure: A line of shavings or dry grass should be laid out at an angle to the wind. Kerosene oil should be used to create a continuous line of fire. Cartridges should be placed in a line spaced 25mm apart, with the wrappers removed and placed underneath. Cartridges should be placed approximately 6 meters from the line of flammable material, which will be ignited by a safety fuse.
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Description
This quiz covers important guidelines and instructions regarding the storage and use of explosives as per the Indian Explosive Act 1884 and related regulations. It includes details on the roles of staff, materials used, collection transport, safety measures, and procedures for blasting in railway operations.