of quarry blasting from Quarry A and B towards the nearby residential area. This outcome may contribute to the knowledge of rock blast management by enriching the parameters selection for future blast design refurbishment. The previously stated project aim can be solved by tackling these specific objectives stated which is to identify the blast ...
Aug 24, 2020 In a limonite quarry, in Malaysia Murlidhar et al. 16 a model hybrid was used based on Imperial Competitive Algorithm and Articial Neural Network, in order to predict the breakage of rock through blasting, using as an input data diverse blasting parameters and characteristics of the rock mass.
fEATuRE 10 TA Construction Blasting and Alternative Non-Explosive Rock Breaking Techniques by Ir. Hj. Look Keman bin Sahari Malaysia is a fast developing country, therefore, there is an urgent need to open up more land for new industries and
Drill and Blast Parameters Table 1 shows the drill and blast design parameters as obtained from each blast event. The powder factor varies from 0.34 to 0.43 3kg/m while the quantity of explosive detonated per blast hole varies from 54.91 kg to 67.73 kg. All the six blast events have
In Malaysia, quarry operation is increasing year by year. Quarries in Malaysia are operated above the land surface area or open surface in order to extract the rock through mining, cutting and blasting (Kou, 2008). 5.10Quarry and mining sector in Malaysia was started over 1970s (Ali et al., 2011). Department of SourceMineral and
EAST ROCK has an annual production capacity of 5,000,000 metric ton.. EAST ROCKs main quarry products are crusher run, aggregates, blocks stone, quarry dust, ballast, armour rock, stone column for infrastructure, breaks water and port construction, railway construction, slope remedial, housing development, hotel, commercial and high rise construction and plant manufacturing such as ...
Quarry Academy 2005 Blast Management Blast data Ampang Quarry Malaysia Rock type Granite Bench height 18 m Drill-hole diameter 89 mm Drill pattern 3x3 m2 Explosives Emulite 150 5 kg/hole ANFO 70 kg/hole Powder factor 0.46 kg/bm3 Photo S.O. Olofsson
than one face so that simple blasting patterns can be used to remove the rock. In the illustration that follows (Figure 8-4) shows a typical bench cut with two free faces and fired with one delay per row. Figure 8-5 indicates that the direction of throw of the blasted rock can be controlled by varying the delay pattern.
PARAMETERSNAM CURRENTLY CALCULATED UNITS E PARAMETERS PARAMETERS Burden 3.0 2.28 m Spacing 4.0 2.83 m Sub-drill 0.5 0.68 m Stemming height, h 3.5 2.28 m Bench height 6.5 6.32 m Hole diameter 76 76 mm Hole depth 7 7 m Powder factor 0.92 0.85 unitless Stemming material 6-10 mm aggregates Loam and Clay soil Since the parameters used at Nyanza ...
Noise from rock blasting and other quarry operations are responsible for loss of biodiversity particularly birds. Soil samples were collected at depths 0-15 and 15-30 cm from the three quarry sites and from a control, 1 km off the quarry sites, against the direction of drainage. Water sample was also collected from an abandoned
blast. Modification of blasting procedures should include limiting the size and frequency of blasts to limit the production of noxious fumes, and stripping of the overburden prior to blasting and excavating the shot rock immediately after blasting to allow the venting of gases. The use
studies 74,75, resistance parameters of the rock mass can have a deep impact on explosive operations Figure 1. Flowchart of di erent steps in this study. 2.1. Case Study and Data Collection In this study, in order to apply methods for PPV evaluation, four quarry blasting sites in Malaysia were selected.
rock mass parameters (geology, in-situ stress, and rock strength and stiffness) and 3. ... during the tests were those commonly used in perimeter blasting. The Vnga dimension quarry was the core site for the blast damage investigations. Here, tests were conducted under carefully controlled conditions. Saw cuts were
In this regard, 232 blasting operations were investigated in five granite quarries, Malaysia. Blasting parameters comprising maximum charge per delay and powder factor were prepared to predict ...
Teknologi Malaysia, Johor, Malaysia. ... Blasting is common activity used in quarry to fragment rock which the aim is to ... One borehole bench blast model. Table 1. Input parameters of the calibrated model. Properties Value Properties Value Particle radius/mm 100-125
Blasting is a widely used technique for rock fragmentation in opencast mines and tunneling projects. Ground vibration is one of the most environmental effects produced by blasting operation. Therefore, the proper prediction of blast-induced ground vibrations is essential to identify safety area of blasting. This paper presents a predictive model based on gene expression programming (GEP) for ...
(2019) Ramanathan, Abdullah. Sains Malaysiana. The drill and blast technique have been widely used recently due to demand for natural building materials like rock aggregates. However, the intensity of blasting effects has been questioned on its validity towards the nearby residential areas. In th...
Blast Monitoring Almost all quarries in Malaysia are required to carry out blast monitoring works to ensure that both the vibration level and airblast level are within the approved limits. Whilst there are many suppliers of seismograph in Malaysia nowadays, they do not have the technical knowledge on how to use the
Jun 01, 2014 A total of 62 blasting operations have been investigated from four granite quarry sites in Malaysia. These sites are located near Johor city, the capital of the Johor State, as shown in Fig. 1.Granite quarry in the mentioned sites are blasted using 75, 89, and 115 mm diameter blastholes and ANFO was used as the main explosive material.Fine gravels were used as the stemming material.
An Analysis and Prevention of Flyrock Accidents in Surface Blasting Operations by T. S. Bajpayee, Harry C. Verakis, and Thomas E. Lobb Abstract Blasting is a primary means of extracting minerals and ores at surface mining operations. The domestic consumption of explosives and blasting agents during the year 2002 was about 5.53 billion pounds.
Jan 01, 2019 Rock samples from six selected quarries were analyzed. Point load tests were carried out on the rock samples using standard procedures. Uniaxial compressive strength, tensile strength and drilling rates of the rocks were evaluated to determine the correlation between rock drillability (m 3 /hr) and blastability (blasting coefficient).
Rock fragmentation assessment plays a key role in the evaluation of efficiency and productivity of quarry blasting. Hence, regular assessment of rock fragmentation is needed to control it. If rock fragmentation is not controlled, it can increase production cost and delay the quarrying process due
Dblast hole diameter (mm), Wstandard deviation of the drilling accuracy (m), Ltotal charge length (m), HBench height (m).Cunningham (1987) notes that the uniformity coefficient n usually varies between 0.8 and 1.5 1.3 Bench Blasting Parameters Bench blasting in open pit
presented a new model for prediction of rock fragmentation by blasting based on the basic concepts of the rock engineering systems (RES). Akbari et al. 33 investigated the influence of rock mass properties, blast design parameters and explosive properties on blast fragmentation.
Dec 17, 2009 Following are the techniques of controlled blasting Line drilling, Trim (Cushion) blasting, Smooth (contour or perimeter) blasting, Pre-splitting, Selecting and employing various parameters of blast design, using modern technology, Precise and accurate timing
2019-12-31 2.0 LITERATURE REVIEW In Malaysia, quarry operation is increasing year by year. Quarries in Malaysia are operated above the land surface area or open surface in order to extract the rock through mining, cutting and blasting (Kou, 2008). 5.10Quarry and mining sector
Blasting is the most productive excavation method in hard rock mining. In quarries, to remove the mother rock from in-situ and crush into the desired size is realized by bench blasting method.