Seismic velocity and electrical resistivity methods can be used to assess rock rippability and determine suitable areas for ripping. While seismic methods have limitations in obtaining detailed information at specific locations, resistivity provides additional information about rock properties with depth. The study emphasizes that blasting near sensitive structures requires proper documentation, monitoring, and adherence to sound and vibration limits. It concludes that blasting should be adopted carefully, while ripping is a suitable alternative for softer rock, with a combination of seismic and resistivity methods providing more comprehensive information for excavation planning.

Download Blasting AND/OR Alternates: Selecting/Choosing the Alternates

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Blasting can produce undesirable effects such as overbreak, ground vibrations, noise, air overpressure and fumes, which, if not controlled, may cause damage to nearby neighbourhoods and structures.

The objective of this paper is to review research conducted on blast-induced ground vibrations and broadly identify the existing research gaps. Previous research has focused on methods for controlling ground vibrations and associated damage, establishing permissible limits, developing empirical formulas for accurate prediction of ground vibrations, and improving prediction models.

The research also considers factors such as ground surface conditions, charge length, the accuracy and inaccuracy of delay detonators and their acceptable limits, geological structures including jointing patterns, geomechanical properties of rock, strata changes, and improvements in prediction formulas through cloud computing, IoT (Internet of Things), and data mining.

Download Review of Studies on Ground Vibrations and the Future Needs for Research.

The post Review of Studies on Ground Vibrations and the Future Needs for Research. first appeared on Uttam Blastech.

The post Field Evaluation of Stemming Plugs in Limestone Mining first appeared on Uttam Blastech.

Alternates to blasting such as ripping, cutting etc, are used at a few places but have their own limitations. Thus Rock Blasting has no substitute. It’s the cheapest and fastest Rock Breaking technique and the only technique capable of producing huge volumes as demanded by today’s business needs.

Higher volumes of productions necessitate higher volumes of use of explosives. Making it more susceptible to claims and litigation.

As the Mining & Civil Engineering industry expands and so also the villages and cities, explosives users need to find the ways to insulate themselves against spurious claims and vexation litigation. The legal position elucidates the tortious and regulatory liability of the mine owner. The object of the regulations is to ensure a fair balance between the right of the mine owner and the right to life and liberty of the persons as guaranteed by the Constitution of India.

This paper discusses the facts, legal position and mitigation methods of such claims and litigations.

BLASTING RELATED LITIGATION : FACTS, LEGAL POSITION & WAYS OF MITIGATION METHODS

The post Blasting Related Litigation first appeared on Uttam Blastech.

Woking of quarry in India is governed by many Rules. A few of them are:

• MCDR
• Minor Mineral Rules of the State
• Explosives Rules – Latest Circular
• Explosives Rules
• AN Rules
• Mines Act
• Mines Rules
• Metalliferrous Mines Regulations

Apart from Industrial Disputes Act, Minimum Wages and other Rules Governing the employment of Labour and Running of Industry.

You need clearances/Permissions/ Licenses from

• MOEF
• PESO
• DMS
• DMG of your state
• IBM in case of Major Minerals

Apart from other permissions a normal industry needs.

Though there are many legislations complying with them is not very difficult. Legislative compliances pay back their investments by

• Lowering the cost of procurement of products such as buying explosives directly from the manufactures at a competitive price.
• Being able to buy a better quality of product.
• Reduced Accidents
• Increased productivity
• Reduced fines etc..paid.
• Positive Image among the stake holders and authorities.
• Being able to attract high calibre workers.

You also need to maintain a few simple registers and plans under these Legislations. Order Registers

How can I buy enough good quality explosives for my Excavation needs?

• The best is to understand your requirements, constrains in procurement and the nearest sources of supply and the quality of supply.
• Then apply for the license with proper forms and drawings
• Usual time taken is 6 months.
• The investment payback within 6 months to 3 years in form of
  • Better out put
  • Reduced cost of procurement.
  • Peace of mind.
  • Download Explosives Rules and AN Rules

The post Operating a Quarry first appeared on Uttam Blastech.

The post Selecting a Seismograph first appeared on Uttam Blastech.

Looks are deceptive, hence world gets struck goes a saying in Marathi. The saying holds good in quarrying areas as well.

Before selecting quarry or quarry areas, you should know:

• The Quality and Quantity of rock in the proposed area,

• Quantity of Over Burden ( OB)
• Amount of OB to be excavated to mine desired output.
• Are there or can there be any local issues
• Can they be overcome?
• Which is the nearest area that can produce my desired output at the same time is not far away?
  A distance of 1 km saved translates into saving of Rs 10.00 Per Ton per Km in India

The post Selecting Quarry Area first appeared on Uttam Blastech.

Most of the complaints of damage due to Blasting are avoidable and can be easily overcome in court of law.

Whenever people complain of damage, its often that the noise due to blasting is annoying. Common man can’t differentiate between noise and ground vibrations; hence it is always better to know the truth.

In most of the cases there non-technical reasons for the complaint and blasting is the first to be blamed.

Mitigating & countering Complaints

• Pre blast survey
  By recording the conditions of the structure and in the structure, a record of the conditions of the structure is maintained by a 3^rd party who in case of complaints acts as an independent assessor of the damage and witness in case of legal tangle.
• Third Party Monitoring
  An independent agency measures the Noise and Vibrations of all the Blasts and acts as an assessor and witness.

The post Blasting/Excavation Litigation first appeared on Uttam Blastech.

• The Rule of Safe Blasting Distance is there are no Rules.
• There are instances where Blasting was done to chisel a sculpture out of a mountain.

• There are also instances of blasting Damage witnessed more than a kilometer away
• What matters is the attitude of the Blasting Company and the site owner.
• A company and employee who believe in safety, Legal compliance’s, complaints avoidance and is conscious of neighbors are always preferred over the prescribed distances.
• Hence, though Indian Regulations Prescribe 500 Meters as the safety distance for Blasting, Regulation 164 of Metaliferrous Mines Regulations of Government of India, allows blasting with certain conditions within the safety distance.

The post Safe Distance for Blasting first appeared on Uttam Blastech.

• Planning your crusher layout is very critical to the entire planning process.
• While crusher layout in series reduces the capital costs, it severely reduces the overall availability of the plant.
• While Modular/ Parallel layout increases the capital cost and also increases the Variable costs a bit; the overall costs come down as the Plant availability increases many times.

Example:

• A 3 stage Plant with a availability percentage of- 75%
• In Series layout has an overall availability of- 42%
• In Parallel overall availability is- 98% 

The post Crusher Layout first appeared on Uttam Blastech.