scholarly journals Evaluate impacts of ground vibration on construction projects and determine reasonable blasting scale for Phong Xuan limestone quarry in Thua Thien Hue province

2020 ◽  
Vol 61 (4) ◽  
pp. 118-125
Author(s):  
Hieu Quang Tran ◽  
An Đinh Nguyen ◽  
Bao Dinh Tran ◽  
Phonepaserth Soukhanouvong ◽  
Keyword(s):  
Construction Projects ◽  
Ground Vibration ◽  
Blasting Vibration ◽  
Measurement Equipment ◽  
Monitoring Equipment ◽  
Limestone Quarry ◽  
Limestone Quarries ◽  
Vibration Wave ◽  
First Time

One of the advanced methods to evaluate the effects of blasting vibration wave on the constructions in need of protection surrounding limestone quarries is to use measurement equipment, according to Norm QCVN 02:2008/BCT of Ministry of Industry and Trade (Vietnam). It is the first time in Vietnam when the authors employ the blasting monitoring equipment MR3000BLA made of Bartec Syscom (Switzerland). The equipment is integrated with the new 4.0 technology to measure the effects of blasting vibration waves on the constructions in need of protection surrounding and determine the reasonable size of blasting for Phong Xuan limestone quarry in Thua Thien Hue province.

Research of Colliding Ground Vibration in Blasting Demolition

2013 ◽  
Vol 765-767 ◽  
pp. 2284-2287
Author(s):  
Ze Pei Xu ◽  
Xi Bing Li
Keyword(s):  
Surface Wave ◽  
Shear Wave ◽  
Vibration Frequency ◽  
Ground Vibration ◽  
Compressional Wave ◽  
Vertical Vibration ◽  
Blasting Vibration ◽  
Frequency Bandwidth ◽  
Horizontal Vibration ◽  
Vibration Wave

Colliding ground vibration wave consists of compressional wave, shear wave and surface wave, and it spreads by the attenuation through the different rock or soil. Comparing from the frequency and duration to the blasting vibration, with the engineering example, the analysis on the characteristics of colliding ground vibration has made. It is the conclusion that its vibration frequency is close to the building, and the vertical vibration is greater than horizontal vibration, and frequency bandwidth decreases along the distance, while the duration increases.

scholarly journals Prediction of the peak velocity of blasting vibration based on various models at Ninh Dan quarry, Thanh Ba district, Phu Tho province

2020 ◽  
Vol 61 (4) ◽  
pp. 102-109
Author(s):  
An Dinh Nguyen ◽  
Hieu Quang Tran ◽  
Bao Dinh Tran ◽  
Phonepaserth Soukhanouvong ◽  
Keyword(s):  
Peak Velocity ◽  
Mining Industry ◽  
Ground Vibration ◽  
Blasting Vibration ◽  
Blasting Operation ◽  
Surface Mines ◽  
Forecasting Models ◽  
Surrounding Environment ◽  
Vibration Wave ◽  
The Impact

In mining industry, blasting operation is effective method to fragment rocks, supporting for the next operations in surface mines such as loading, and hauling works. However, blasting operation also impacts adversely on buildings and the surrounding environment, in which the vibration wave is one of the most severe impacts. Therefore, the implementation of the forecasting models of vibration speed contributes significantly to guarantee the safety of buildings located within the impact areas of the vibration wave. This paper employs the monitoring results of blasting activity at the Ninh Dan limestone quarry situated in Thanh Ba district, Phu Tho province, to develop different forecasting models that determine the effects of the ground vibration speed in the surrounding buildings. The results show that the models USBM and Ambraseys Hendron having more accuvate prediction than other models.

scholarly journals Limestone quarries and cave protection

Ecocycles ◽  
2021 ◽  
Vol 7 (2) ◽  
pp. 18-22
Author(s):  
Szabolcs Leél-Őssy
Keyword(s):  
Economic Loss ◽  
Limestone Quarry ◽  
The Real ◽  
Difficult Question ◽  
Value Of Nature ◽  
Limestone Quarries

It happened in Hungary several times that a limestone quarry opened the entrance of a new, unknown cave during its activity such as the case was in the Villány Mountains, in Budapest, and in Kesel?, Naszály or Esztramos Hills. It is right that the natural caves are protected, but what is the solution in such cases? Closing the mine? Absolving the cave from protection? It is a difficult question. The real way: we must weigh. Which is more expensive? How valuable and unique is the cave? How big is the economic loss if we close the mine? And how serious is the harm if it is allowed to annihilate the value of nature, which is impossible to reproduce? Examples follow from Hungary.

scholarly journals Experimental Investigation of the Propagation and Attenuation Rule of Blasting Vibration Wave Parameters Based on the Damage Accumulation Effect

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Huaibao Chu ◽  
Xiaolin Yang ◽  
Shuanjie Li ◽  
Weimin Liang
Keyword(s):  
Frequency Band ◽  
Damage Accumulation ◽  
Low Frequency ◽  
Experimental Results ◽  
Vibration Velocity ◽  
Blasting Vibration ◽  
Main Frequency ◽  
Wave Parameters ◽  
Accumulation Effect ◽  
Vibration Wave

The propagation and attenuation rule of blasting vibration wave parameters is the most important foundation of blasting vibration prediction and control. In this work, we pay more attention to the influence of the damage accumulation effect on the propagation and attenuation rule of vibration wave parameters. A blasting damage accumulation experiment was carried out, the ultrasonic wave velocity of the specimens was measured, and the damage value was calculated during the experiment. The blasting vibration wave was monitored on the surface of the specimens, and its energy was calculated by using the sym8 wavelet basis function. The experimental results showed that with the increase in the number of blasts, the damage continues to increase; however, the vibration velocity and the main frequency decrease continuously, the unfocused vibration wave energy in the zone near to the blasting source is rapidly concentrated in the low-frequency band (frequency bands 1 to 3), and the energy is further concentrated in the low-frequency band in the intermediate zone and zone far from the blasting source. There is a distortion process in which the vibration velocity and the main frequency increase slightly and the energy of the blasting vibration wave converges to the high-frequency band (the 5th band) before the sudden unstable fracture failure of the specimens. The experimental results indicate that the prediction and evaluation of blasting vibration should consider the variation rule of blasting vibration wave parameters synthetically based on the cumulative damage effect, and it is not safe to use only one fixed vibration control standard for the whole blasting operation.

scholarly journals Introducing an innovation promotion model for construction projects

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Sam Fernando ◽  
Kriengsak Panuwatwanich ◽  
David Thorpe
Keyword(s):  
Literature Review ◽  
Construction Projects ◽  
Complex Dynamics ◽  
Relationship Enhancement ◽  
Content Type ◽  
Study Approach ◽  
Project Outcomes ◽  
First Time ◽  
Comprehensive Study

PurposeThis study aims to investigate and model the complex dynamics of innovation enablers in construction projects aiming to develop a framework identifying actions for clients to promote innovation.Design/methodology/approachThrough a comprehensive literature review, a conceptual model was previously derived to explain the client-driven enablers in promoting innovation. This was tested using the data from 131 Australian construction projects. Statistical analysis was conducted on the data using factor analysis and correlation analysis to test the model, which was validated using the case study approach. The testing and validating aspects are explained in this paper.FindingsThe constructs of the recommended model are idea harnessing, relationship enhancement, incentivization and project team fitness.Research limitations/implicationsThe difficulty of analyzing the complex dynamics happening within projects in relation to innovation has been a barrier to progress research in this area. The introduction of this model would pave the way for researchers to explore this area with ease.Originality/valueAs revealed in the detailed literature review undertaken, this is the first time that a comprehensive study has been conducted to identify client-led innovation enablers for construction projects. The results would benefit industry practitioners to achieve enhanced project outcomes in construction projects through innovation.

Ground Vibration due to Blasting in Limestone Quarries

Fragblast ◽  
2004 ◽  
Vol 8 (2) ◽  
pp. 85-94 ◽  
Author(s):  
G.R. Adhikari ◽  
A.I. Theresraj ◽  
H.S. Venkatesh ◽  
R. Balachander ◽  
R.N. Gupta
Keyword(s):  
Ground Vibration ◽  
Limestone Quarries

Blasting Vibration Signals Time-Frequency Analysis Based on S-Transform

2012 ◽  
Vol 588-589 ◽  
pp. 2013-2017
Author(s):  
Dong Tao Li ◽  
Jing Long Yan ◽  
Le Zhang
Keyword(s):  
Frequency Analysis ◽  
Vibration Signal ◽  
Transformation Method ◽  
Blasting Vibration ◽  
Time Duration ◽  
Vibration Signals ◽  
Time Frequency Analysis ◽  
Time Frequency ◽  
S Transform ◽  
Vibration Wave

Introduced the theory of S-transform, designed simulation experiment and the frequency components distribution versus time was, verified that the S-transformation method is suitable for blasting vibration signal time-frequency analyzed. Applied it to the time-frequency analysis of measured blasting vibration signals at situ, the results show that S-transform has excellent time-frequency representation ability and higher resolution, reveals the detail information of blasting vibration wave changing with time and frequency, and provides a new way for blasting vibration research. Determined the desired delay intervals through comparing the energy of signal and the time duration of the waveform at characteristic frequency between two-hole blasting vibration signals with different delay intervals.

Stability Assessment of the High Safety Pillars in Slovenian Natural Stone Mines / Ocena Stabilności Wysokich Filarów Bezpieczeństwa W Kopalniach Kamieni Naturalnych W Słowenii

2015 ◽  
Vol 60 (1) ◽  
pp. 403-417
Author(s):  
Jože Kortnik
Keyword(s):  
Safety Monitoring ◽  
Geological Structure ◽  
Raw Material ◽  
Natural Stone ◽  
Stability Assessment ◽  
Underground Excavation ◽  
Open Spaces ◽  
Limestone Quarry ◽  
Trial Basis ◽  
First Time

Abstract For the first time in Slovenia, the underground excavation of natural stone blocks was introduced on a trial basis at the Hotavlje I colourful limestone quarry in 1993, in 2002 at the Lipica II limestone quarry, in 2008 at the Lipica I limestone quarry and in 2009 also at the Doline limestone quarry. This was primarily because of the geological structure of the site, the quarry’s condition, the potentially large amounts of the overburden in the event of an expansion of the surface part of the quarry, and the increasing needs for this raw material, i.e. natural stone. The underground excavation of natural stone in all locations are done using a modified room-and-pillar excavation method that is adjusted to each site’s characteristics, with regularly or irregularly distributed high safety pillars. Since the underground excavation of natural stone blocks is performed at a relatively shallow level under the surface, i.e., at a depth of only 10-40 m, the value of the primary vertical stress state is also relatively low (less than 1.0 MPa). This significantly increases the risk of wedge-shaped pieces or blocks falling out of the ceiling in open underground spaces. In previous years, special attention was paid to the installation of stress-strain systems for controlling the planned dimensions (width and height) of large, open, underground spaces (rooms) and the dimensions of the high safety pillars, along with continual monitoring and identification of the instability phenomena in the ceiling and sides of the large open spaces (rooms). The paper presents the methods and devices used for the optimization and the safety monitoring of high safety pillars for the underground excavation of natural stone blocks in Slovenian natural stone mines.

scholarly journals Post-mining Land of Limestone Quarries for Sengon Plants in PT Semen Baturaja (Persero) Tbk

2018 ◽  
Vol 2 (4) ◽  
Author(s):  
Regi suhada pujakesuma ◽  
Restu Juniah ◽  
Harminuke Eko Handayani
Keyword(s):  
Final Stage ◽  
Mining Activities ◽  
Limestone Quarry ◽  
Geological Conditions ◽  
Reclamation Area ◽  
Limestone Quarries ◽  
Climate Space

Limestone mining in PT Semen Baturaja mine mining materials in the form of limestone. Limestone is the material needed to make cement. Open mining activities at the final stage will leave ex-mining land. Ex-mine land in the PT Semen Baturaja reclamation area has been planned for revegetation of sengon seedlings. The research was conducted to examine economically post-mining land of limestone mines for sengon plantations. The initial baseline studied in the study area includes climate, space and geological conditions, and vegetation. Some plants in the study area include sengon, cypress, and guava. The results showed that the use of limestone quarry land for sengon plants had met economically. The results of the study are expected to be utilized by stakeholders, academics, practitioners, researchers, mining associations and the environment.

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