International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 09 Issue: 06 | Jun 2022
p-ISSN: 2395-0072
www.irjet.net
A Study on Blast Induced Effects on Environment G. Durga Nookaraju1, Vinay Kumar Patel1, P. Vinay Krishna2 Department of Mining Engineering, Bhagwanth University, Sikar Road, Ajmer-305004, Rajasthan, India Graduate Engineer Trainee (Mining), Transnational Drilling and Mining Associates Pvt Ltd, Zawar, Rajasthan, India ---------------------------------------------------------------------***--------------------------------------------------------------------for the construction industry to use as raw material in Abstract - Mining activity plays a major key role in the 1
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building and road constructions. In the study site for carrying blasting, first the holes are drilled with the help of drilling machines which are operated with the help of pneumatic power, the drilling machined used at the site was depicted in the Figure 1.
development of any country. The development of the nation depends on the industries and most of the industries requires raw material to run it. Mining is the basic source of raw material for most of the industries. Blasting is the economic way for the extraction of the minerals and execution of blasting will results in various environmental effects. In the current study the effect of blast induced ground vibration and air over pressure on environment was studied.
Key Words: Mining, Blasting, Blast induced ground vibration, Blast induced air over pressure.
1. INTRODUCTION Mining activity plays a major key role in the development of any country. The development of the nation depends on the industries and most of the industries requires raw material to run it. Mining is the basic source of raw material for most of the industries [1]. Drilling and Blasting are the two key operations in the mining industry Drilling is a process in which the holes are made into the rock surface and Blasting is the process of breaking of rock with the help of explosives [2]. When the explosives are subjected to initiation, blasting will happen and during this process huge energy and pressure will be generated, which will help to break the rock. As per past research only 20 to 30 % of the energy which was released during the blasting will be utilized for rock braking and 70 to 80 % of the energy gets wasted in the form of other blast induced effects like Blast Induced Ground Vibration (BIGV), Fly rock, Noise generation and Back Break which can be said as the side effects of blasting[3]. The generation of these side effects have impacts on the environment. Among all the generated side effects the vibration and noise has several adverse effects on environment [4]. So, it is important to design a proper blast design to reduce the Blast Induced ground vibration and noise to mitigate the environmental effects of blasting operation. In this present study the blast induced vibration and noise were monitored at a stone quarry where the blasting activity is carried for breaking the rock.
Figure 1: Drilling machine at study site After the completion of the drilling the drill holes will be charged with explosives which is technically termed as the charging of holes. The drill hole is divided into two parts namely, charge column and the stemming column. The charge column consists of explosive and the stemming column will be filled up with some non-combustible material like sand or drill chippings. The charge pattern of drill hole shown in Figure 2.
METHODOLOGY An extensive field investigation is carried out at a blasting quarry in Andhra Pradesh state in India. On the selected site blasting activity is being carried for converting solid rock mass into small fragments and that was supplied
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