Quarry Operation

1.0 Introduction
This covers all the operations under the development of proposed mechanized quarry site with the details of equipments, machinery and procedures related to the quarry operation including quality control verifications, safety, health and environmental measures.

2.0 Abbreviations

QM – Quarry Manager
ME         – Mining Engineer
SO       – Safety Officer
CEA       – Central Environmental Authority
GSMB    – Geological Survey & Mines Bureau
IML         – Industrial Mining License
EPL         – Environmental Protection License
IEER       – Initial Environmental Examination Report
NBRO     – National Building Research Organization

3.0 Resources

Man Power Equipments Materials
Quarry Manager 03 Nos.  Air Compressors Dynamite
Mining Engineer 1 No. Track Drill Ammonium Nitrate
Safety Officer 3 Nos. Hand Held Rock Drills Detonators
Blasting Foreman 3 Nos. Excavators Electric Cord
Blasting Headman 2 Nos. Crushing Plants Quarry Dust
Powder men 1 No. Rock Breaker Diesel
Drillers & Helpers 1 No. Front End Loader
Heavy Equipment Operators 5 Nos. Dump Trucks
Mechanics 3 Nos. Wheel Loaders
Electricians 1 No. Vibratory Roller
Welders 3 No. Tandem Rollers
Security Staff 3 No. Bulldozers
Drivers 6 Nos. Generators
Laborers 1 No. Fork Lift
1 No. Motor Grader
1 No. Water Pump
Circuit Tester
Blasting Machine
Hand Speaker

4.0 Methodology
Methodology Flow Chart Download Here
Inspection Check List

4.1 Removal of Overburden & Top Soil
1.This area contains a soil profile which is strewn with boulders and generally 0-2m    deep and overburden would be removed with excavator.

4.2 Drilling Pattern and Particulars
1. Drilling at top of the rock would be carried out up to depth of 6m with 64mm drill bit with compressed air driven track drill machine to a total of 10 holes.
2. Hand held rock drill would be used in making and leveling the berm or access road,
if any occurrence of humps which would obstruct the haulage machinery to operate.

4.3 Charging of Bore Holes
1. Charging of bore holes with explosive materials would be done under strict supervision of Mining Engineer.
2. Electric short delay detonators one and/or two in each delay would be used in drilled holes per one blast.
3. A total of maximum 10 holes with 6m depth would be used for a single blast with a maximum of 5.6 kg of dynamite and not exceeding 75kg of ANFO as main blasting agent.
4. Charging would be done with more than 2.8m stemming height.
5. For stemming material, quarry dust would be used.
6. If the bore holes are in wet condition, explosive materials covered by polythene cover would be inserted to the bore hole.
Inspection Check List

4.4 Firing of Explosives Before and After
1. Blasting activities would be carried out in few blasting faces and the blasting face would be developed according to bench system in order to avoid unsuitable working conditions.
2. Only industrial explosives, blasting agents and accessories manufactured to international standards would be used for blasting.
3. The standard explosives storing and handling methods would be strictly followed during the storing, transporting, mixing charging and testing to avoid any misfires.
4. Explosives would be stored in a specially constructed container by covering the container wall with light weight wood so as to keep air gap to reduce the heat effect and providing ventilation holes.
5. For security reasons, the storage container would be placed at the nearest police station.
6. Explosive mixing, charging and firing would not be done under adverse weather conditions.
7. Before once the detonators is joined together in the method of series circuit pattern, the firing cable is laid out in the opposite direction of blasting face.
8. Maximum 12 blasts per week (Maximum 3 blasts per blasting day & maximum 4 blasting days per week) would be carried out.
9. In blasting operation, the air blast over pressure level would not be exceeded 105dB.
10. Time of blasting would be 9.00h – 17.00h on week days except public holidays.
11. 30 minutes before the firing, people in surrounding area would be alerted to move away from the blasting perimeter and into the designated safe area. This would be done using a hand speaker.
12. Sentries would be posted with red flags, to safe designated area where people will     be gathered. Strict instructions would be adhered and no one would be allowed to enter the area until the all clear signal are sounded.

13. After the blasting, quarry face would be checked up for misfired.
14. The houses in the vicinity would be checked up for any mishaps, damages or injuries to persons or property.

Inspection Check List

Download Methodology Flow Chart

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