Bench design geometry parameters are considered the important issue of rock extraction. It directly has influences on rock extraction on all surface mines and quarries operation. This paper discuss the bench height calculation according to three important considerations; the stability of slope faces, the safety of the work place and the efficiency of the work place, besides the …
supersedes any previous documents that relate to emission factors for the mining industry issued by the BAPC. Page 2 of 29 Issued May 31, 2017 Table of Contents Section 1. Introduction 3 1.1. Purpose 3 ... Limestone, granite, dolomite, traprock (basalt), sandstone, quartz, quartzite. The BAPC also allows use of Chapter 11.19.2 emission factors ...
In a limestone quarry mine, fragmentation is a crucial outcome of blasting operations. The optimization of blasting operations greatly benefits from the prediction of rock fragmentation. ... If we refer to domain knowledge of drilling and blasting in mining, the powder factor in determining rock fragmentation is a very important factor. So, it ...
Powder factors greater than 0.7–0.8 kg/m 3 result in a lower uniformity index, according to an analysis of monitored blast results. The results showed that powder factors of 0.7 kg/m 3 (between 1.6 and 1.7) had the highest uniformity index. According to the findings, the small-scale optimum blast uniformity index is between 1.33 and 1.68.
of fly rock in Indian limestone mines using ANNs after propagation, and indicated that the amount of charge per hole, depth of holes, burden, spacing, stemming, hole diameter, powder factor, rock quality designation (RQD), and compressive strength were the most influential parameters in the fly rock distance. Nguyen et al. [19] have predicted
Basantnagar Limestone Mines is a captive limestone mine of M/s. Kesoram Cement, which is located in Palakurthi Mandal of Peddapalli District, Telangana. The lease ... to 25% is used to boost entire column of explosive with powder factor 8.0 to 8.5 Tonnes/Kg of Explosive. 03. LEVELING BY DOZER After blasting, blasted material will be dozed at ...
Powder factor can be defined as the quantity of explosives (kg) required to break a unit volume or tonne (t) of rock. The prospect of excavating rocks by blasting is characterized by a specific ...
280 G. Agyei and M. O. Nkrumah strengthonexplosiverequirementsduringblast-ing. 3.1. PowderFactorvs. UniaxialCompressive StrengthofRocks(UCS ...
Blasting is essential in mining for rock fragmentation, significantly impacting downstream processes, overall productivity, and the efficiency of resource extraction. This study uses machine learning models, including decision tree regressor, random forest regressor, support vector regressor, and Extreme gradient boosting machine to predict the blast …
Download scientific diagram | General view of Dobari open cast mine (Study area) from publication: Effect of Stemming to Burden Ratio and Powder Factor on Blast Induced Rock Fragmentation– A ...
Hot Sale Grinder Limestone Powder Mill Machine In South Africa, ... Ltd. Supplier or Manufacturer on Alibaba ... limestone powder mill in nigeria – Grinding … . limestone powder supplier ... uses for limestone powder in south africa powder factor limestone mines ... Pakistan,limestone powder mill internal ...
Calculate the powder factor if each hole is charged with 50 kg of explosive. In an open pit limestone mine a burden of 3 m and spacing of 4.2 m is being kept. If the height of bench is 10 m and 30 holes are to be blasted, calculate the amount of limestone this blast will yield if the density of rock is $2.5 mat{t} / mat{m}^3$.
fragment size, powder factor and charge factor. 2. Case study The study was conducted in Aditya Limestone Mines of UltraTech Cements Limited, Aditya Cement Works, Shambhupura, Chittorgarh, Rajasthan. The limestone deposit in the mine belongs to Nimbahera limestone formation where limestone, shale and clay are the major rock type (Parihar and
Powder Factor in Kg/m3 0.10–0.18 0.18–0.34 0.34–0.57 0.57–1.14 Figure 5: . UCS vs. Powder factor [31]. tual explosives energy requirement to create efficient fragmentation and cause displacement of the rock mass. It was found that the relation kept increasing until a powder factor of 1.02 kg/cu. m was achieved.
bottom charge, powder Factor for limestone quarry at Al Ain El Sukhna – west of Gulf of Suez according to field trial tests. 1. Introduction In surface mining drilling and blasting are the major …
This research work is carried out to aim analysis and improvisation of powder factor and rock fragmentation achieved by blasting at JK cement Maliakhera limestone mine, Nimbahera, …
factors favoring large-scale production by underground mining are becoming more ... especially for limestone mining in the central and eastern parts of the United States, as producers increasingly recognize the ... with water, in continuous hydrators. The end product is a fine dry powder, or with excess water, pumpable milk of lime. 9.2 Inputs ...
Powder factor values (P.F.) is 0.40-0.66 kg/m 3 at 80% passing over 0.5m. ... However, some mines like Rajashree cement limestone mine had adopted a combination of air-deck with SME so as to have ...
JOURNAL OF MINES, METALS & FUELS 357 ... Bangkok is developed due to medium to large aggregate quarries situated up to 200 km from Bangkok utilizing granite, limestone and basalt as resource. Aggregate consumption will be exceeding 350 ... minimum powder factor is essential for achieving overall reduction in cost of drilling and blasting [5-12 ...
Dust is one of the most significant challenges in the mining industry, which adversely impacts the environment and human health. This research develops a hybrid approach based on dimensional analysis and regression analysis (H-DAMRA) methods to predict dust emission distance due to the bench-blasting in a limestone surface mining located in West …
Using the powder factor method of surface blast design, calculate subgrade drilling, stemming length, length of hole, charge length/hole, amount of explosive to be charged/hole, if charge/m length amount is to be 21.5 kg / m. ... burden and spacing. In a limestone ore mine, the rock density is $2.5 mat{t} / mat{m}^3$, the drill hole ...
Powder factor is a design methodology rooted in the idea that a set number of pounds of explosives per cubic yard (or ton) of rock will give specific desired blast results.
Analisis Rock Factor Dan Pengaruh Powder Factor Terhadap Fragmentasi Pada Batuan Limestone Di Bukit Karang Putih Pt. Semen Padang (Persero) ... final project is attained the value of rock factor 5.01 by using Monte Carlo simulation and the relationship between powder factor with the fragmentation is 72% with equation Y = -102,89X + 50,086 ...
bottom charge, powder Factor for limestone quarry at Al Ain El Sukhna – west of Gulf of Suez according to field trial tests. 1. Introduction In surface mining drilling and blasting are the major unit operations and have a big effect on the materials fragmentation, safety and total production cost. Drilling and blasting cost in any
Underground mining is conducted when the ore is present at depths greater than 100 meters or when limestone availability is abundant. Other factors that determine underground mining include the hardness of the topsoil covering the mineral, such as rocks. The first step in starting underground mining is considering the economic factors.
DOI: 10.1007/s40033-024-00812-7 Corpus ID: 272942578; Prediction of Rock Fragmentation for Surface Mine Blasting Through Machine Learning Techniques @article{Raj2024PredictionOR, title={Prediction of Rock Fragmentation for Surface Mine Blasting Through Machine Learning Techniques}, author={Anuj Kumar Raj and Bhanwar Singh …
about 20 to 25% is used to boost entire column of explosive with powder factor 8.0 to 8.5 Tonnes/Kg of Explosive. 03. LEVELING BY DOZER After blasting, blasted material will be dozed at face, which helps for safe loading in ... Basantnagar Limestone Mines has taken measures of water sprinklers at dust emitting ...
The prediction of powder factor would prove an important and reliable indicator to the mining profession. As a result, research workers carried out many investigations in order to determine powder … Expand
Powder factor,kg/BCM ... and the Kuz-Ram model in particle size distribution analysis at a limestone quarry. ... of blasting is a major factor in the surface mining industry and must be addressed ...
In this study, an attempt has been made to design the effective factors on Tajareh limestone mine explosion [i.e., burden, blast-hole, spacing, hole length, sub-drilling, stemming, powder factor, charge in each delay and Geological Strength Index (GSI)] in order to reduce improper fragmentation and flyrock.
displace a given volume of rock (powder factor). The burden-to-charge diameter ratio varies with rock density, changing the powder factor. The average burden-to-charge diameter ratio of 25 to 30 is for average density rocks similar to the typical rocks listed in table 19-1. Denser rocks such as basalt require smaller ratios (higher powder factors).
Evaluation of blast induced ground vibration and powder factor in surface limestone quarries using statistical and ann approach. ... Department of Mining Engineering [28] This thesis is submitted by students/Research scholar/ faculty; Search in IDR. Search in IDR This Collection. Advanced Search. Browse.
About Us. Sri Ganesh Mines and Minerals was established in 2005 and is one of the leading and successful premier private sector company in Tamilnadu, India. It occupies a place of pride in production and marketing of Calcite powder, …
This paper aims to review the various methods for powder factor estimation in both surface bench blasting and underground tunnel operations; to assess of the influence of intact rock properties on powder factor selection, and to analyse …
Powder factor can be defined as the quantity of explosives (kg) required to break a unit volume or tonne (t) of rock. The prospect of excavating rocks by blasting is characterized by a...
Materials and Methods. A locally available Type I/II ordinary Portland cement (OPC) conforming to the ASTM C150 specification [] with a 3.7 % limestone (91.0 % CaCO 3) addition by mass was used in this study.The limestone powder (LS) was obtained from a commercial aggregate production plant, supplied as the dust of fracture passing through a #100 (150 μm) sieve, …
The median fragment size (X50) was also predicted as a function of rock strength factor, powder factor (q), explosive charge per hole (Q), and SANFO using modified Kuz–Ram models by Cunningham (1987) and Gheibie et al. (2009) in 42 zones of Sungun open pit copper mine, Rashakan limestone, Soufian limestone, and Golgohar open pit iron mine.
The powder factor of the limestone in bench blasting is 2.5 tonne per kg of ANFO, while a 2m sub drilling is carried out with ANFO (density 800kg/mº) as column charge and cast booster of 250g as primer.
Powder factor is an important parameter used in blast design process. It is ratio between amount of rock broken and total weight of explosive consumed (tonne/kg or m3/kg). ... to aim analysis and improvisation of powder factor and rock fragmentation achieved by blasting at JK cement Maliakhera limestone mine, Nimbahera, Chittorgarh. All blasts ...
