scholarly journals MANAJEMEN GETARAN UNTUK KESETABILAN LERENG DENGAN METODE “SIGNATURE HOLE ANALISYS” DALAM KEGIATAN PELEDAKAN TAMBANG TERBUKA

2020 ◽  
Vol 1 (1) ◽  
pp. 357-364
Author(s):  
Muhammad Syafiq Isnaya ◽  
Fadhil Bellico ◽  
Dwi Agung Priyanggoro
Keyword(s):  
Wave Propagation ◽  
Particle Acceleration ◽  
Slope Stability ◽  
Ground Vibration ◽  
Analysis Method ◽  
Scaled Distance ◽  
The Stability ◽  
The Impact ◽  
Slope Design ◽  
Maximum Limit

ABSTRAK Pit 10 merupakan wilayah operasional PT. Alamjaya Bara Pratama dalam kegiatan peledakan bekerjasama dengan PT. Multi Nitrotama Kimia sebagai penyedia bahan peledak dan jasa peledakan. Salah satu dampak yang ditimbulkan dari kegiatan peledakan adalah Ground Vibration yang akan mempengaruhi kestabilan lereng pada area pit 10. Desain akhir lereng pada pit 10 menunjukan batas maksimal Peak Particle Acceleration (amax)  yang dapat diterima lereng akibat hasil peledakan sebesar 0,07g, sehingga perlu adanya manajemen getaran agar getaran yang dihasilkan oleh kegiatan peledakan tidak mempengaruhi kestabilan lereng di area Pit 10. Penelitian dan percobaan dilakukan menggunakan metode Signature Hole Analysis (SHA) untuk pemetaan terhadap perambatan gelombang di setiap range blok – strip tertentu untuk kemudian digunakan untuk memodelkan dan memprediksi getaran yang diakibatkan oleh kegiatan peledakan pada setiap blok – strip. Metode Signature Hole Analysis yang dikombinasikan dengan pendekatan Scaled Distance, berhasil menjadi solusi dalam tata kelola getaran peledakan di Pit 10. Hasilnya, sepanjang tahun 2019 berjalan, tidak ada isu berkenaan dengan bagian geoteknik dari lereng-lereng di seputaran area operasional Pit 10. Pendekatan Signature Hole Analysis dan kontrol bersama tim Geoteknik menghasilkan kerjasama yang baik serta tata kelola kestabilan lereng menjadi lebih aman. Kaca Kunci : Kestabilan Lereng, Peledakan, Signature Hole Analysis  ABSTRACT Pit 10 is operational area of PT. Alamjaya Bara Pratama  the blasting activity carried out with PT. Multi Nitrotama Kimia as provider of explosive and blasting service. One of the impact blasting activity is Ground Vibration which will affect the stability of the slope in the area pit 10. The final slope design in pit 10 shows the maximum limit of peak particle acceleration (amax) that can’t be exceed by 0,07g. its very necessary to manage the ground vibration so the vibration produced by blasting activity do not affect the stability of the slope in pit 10. Research and experiment conducted using Signature Hole Analysis (SHA) for monitoring wave propagation in each block-strip used to model and predict vibration which caused by the blasting activity. Signature Hole Analysis combined with Scaled Distance has succeeded in becoming the solution of ground vibration management in pit 10. Throughout 2019 there was no problem with geotechnical issues of slopes around the pit 10. Signature Hole Analysis Method and Geotechnical approachment result good impact of a slope stability on pit 

scholarly journals Vibration Management for Slope Stability with “Signature Hole Analysis” Method in Open Pit Blasting Activity

2019 ◽  
Vol 1 (1) ◽  
pp. 29-35
Author(s):  
Muhammad Syafiq Isnaya ◽  
Muhammad Fadil Bellico ◽  
Dwi Agung Priyanggoro
Keyword(s):  
Wave Propagation ◽  
Slope Stability ◽  
Ground Vibration ◽  
Open Pit ◽  
Analysis Method ◽  
Scaled Distance ◽  
The Stability ◽  
The Impact

One of the impact blasting activity is Ground Vibration which will affect the stability of the slope. Research and experiment conducted using Signature Hole Analysis (SHA) for monitoring wave propagation in each block-strip used to model and predict vibration which caused by the blasting activity. Signature Hole Analysis combined with Scaled Distance has succeeded in becoming the solution of ground vibration management.

Centrifuge Simulation of Wave Propagation due to Vertical Vibration on Shallow Foundations and Vibration Attenuation Countermeasures

2005 ◽  
Vol 11 (6) ◽  
pp. 781-800 ◽  
Author(s):  
K. Itoh ◽  
X. Zeng ◽  
M. Koda ◽  
O. Murata ◽  
O. Kusakabe
Keyword(s):  
Wave Propagation ◽  
High Speed ◽  
Ground Vibration ◽  
Vertical Vibration ◽  
Shallow Foundations ◽  
Testing System ◽  
High Speed Trains ◽  
Railway System ◽  
Environmental Consideration ◽  
The Impact

When constructing a high-speed railway system in an urban area, the reduction of the ground vibration and noise generated by train passages is a vitally important environmental consideration. In this paper we focus on the development of a centrifuge vibration testing system, which can simulate dynamic loading acting on shallow foundations. The system is used to generate vertical vibration similar to that generated by high-speed trains. The characteristics of wave propagation in a shallow circular foundation on sand are investigated. The effects of two types of barriers on vibration reduction are studied. Additionally, the impact of using vibration attenuating materials to build trackbeds is evaluated.

A Slope Stability Analysis Method Based on Unsaturated Seepage of Slope and its Comparison with Geo-Seep Software

2014 ◽  
Vol 540 ◽  
pp. 177-180 ◽  
Author(s):  
Dong Fang Tian
Keyword(s):  
Stability Analysis ◽  
Slope Stability ◽  
Rigid Body ◽  
Unsaturated Soil ◽  
Limit Equilibrium ◽  
Fem Analysis ◽  
Slope Stability Analysis ◽  
Analysis Method ◽  
The Impact ◽  
Unsaturated Seepage

Based on the FEM analysis of unsaturated slope seepage and strength of unsaturated soil, and adopted the assumption of rigid body limit equilibrium to calculate safe coefficient of landslides, a new slope stability analysis method is promoted and the calculation program called USSP is composed and verified. The method could consider the impact of rainfall and water change to slope stability. Compared with GeoSlope package, it is more practical in rainfall or variation of ground water level condition.

scholarly journals ANALISA LINEAR SUPERPOSITION DALAM KELOLA GETARAN TANAH HASIL PELEDAKAN PADA PERTAMBANGAN BATUBARA

2020 ◽  
Vol 1 (1) ◽  
pp. 349-356
Author(s):  
Dhion Pradatama. DM ◽  
Chani Pradasara ◽  
Syarif Nurdiansyah
Keyword(s):  
Wave Propagation ◽  
Delay Time ◽  
Ground Vibration ◽  
Analysis Method ◽  
Linear Superposition ◽  
Service Company ◽  
Engineering Approach ◽  
Vibration Signature ◽  
Waste Energy ◽  
Principle Of Linear Superposition

ABSTRAK Getaran tanah merupakan getaran yang ditimbulkan akibat dari proses peledakan tambang. Selama ini getaran tanah dianggap sebagai waste energy yang dapat merusak dan menjadi isu terhadap lingkungan di sekitar area tambang. PT. Multi Nitrotama Kimia sebagai perusahaan jasa peledakan dan penjualan bahan peledak di Indonesia memiliki kustomer dengan isu demikian, salah satunya adalah PT Adaro Indonesia. Guna menanggulangi isu tersebut, maka dilakukan rekayasa teknik terhadap getaran tanah yang dihasilkan dengan merubah waste energy menjadi work energy dengan prinsip linear superposition menggunakan metode signature hole analysis (SHA) dan dioptimalkan dengan aplikasi inter-deck delay pada lubang double-deck untuk meminimalisir getaran tanah yang ditimbulkan. Penelitian dan percobaan dilakukan menggunakan metode Signature Hole Analisys (SHA) untuk merekam perambatan gelombang di setiap range blok – strip tertentu terhadap area konsen. Gelombang yang telah terekam selanjutnya dianalisis dengan fitur Linear Superposition untuk mendapatkan rekomendasi waktu tunda beserta prediksi getaran yang ditimbulkan. Rekomendasi waktu tunda yang didapat adalah waktu tunda pada inter-hole, inter-row, dan inter-deck yang mana akan diterapkan untuk peledakan selanjutnya. Berdasarkan analisis menggunakan metode Signature Hole Analysis, rekomendasi waktu tunda yang diberikan dapat diterapkan untuk mengakomodir prinsip linear superposition gelombang. Penerapannya dapat dioptimalkan menggunakan inter-deck delay sehingga meminimalisir getaran tanah yang dihasilkan. Dibuktikan oleh getaran tanah yang dihasilkan menggunakan rekomendasi tersebut selalu di bawah standar yang ditetapkan (PVS = < 2.00 mm/s). Kaca Kunci : Getaran Tanah, Signature Hole Analysis, Linear Superposition   ABSTRACT One of the blasting process effect is ground vibration. Ground vibration currently consider as waste energy which it can infere and be an issue to the environment. PT. Multi Nitrotama Kimia as blasting service company and explosives sales in Indonesia has customers dealing with that issues, one of them is PT Adaro Indonesia. To overcome the issue, engineering approach is done to the ground vibration by changing waste energy into work energy with the principle of linear superposition using the signature hole analysis (SHA) method and optimized with the application of inter-deck delay on the double-deck hole to minimize the ground vibration. Researches and experiments are carried out using the Signature Hole Analysis (SHA) method to record wave propagation in each range of certain blocks - strips to the concern area. The recorded waves are analyzed with the Linear Superposition feature to obtain delay time recommendation along with the predicted vibration. The recommended delay time obtained is the delay time on inter-hole, inter-row, and inter-deck which will be applied for next blasting. Based on the Signature Hole Analysis method, the recommended delay time given can be applied to accommodate the linear superposition wave principle. Its application can be optimized using inter-deck delay to minimize ground vibration produced. Its proven by ground vibrations produced using the recommendations always below the specified standard (PVS = <2.00 mm / s). Keywords: Ground Vibration, Signature Hole Analysis, Linear Superposition

scholarly journals Risk analysis and optimization for communication transmission link interruption in Smart Grid cyber-physical system

2018 ◽  
Vol 14 (2) ◽  
pp. 155014771875603 ◽  
Author(s):  
Xingyu Chen ◽  
Puyuan Zhao ◽  
Peng Yu ◽  
Baoju Liu ◽  
Wenjing Li ◽  
...  
Keyword(s):  
Risk Analysis ◽  
Power System ◽  
Network Structure ◽  
Optimization Method ◽  
Path Optimization ◽  
Analysis Method ◽  
Service Distribution ◽  
Transmission Link ◽  
The Stability ◽  
The Impact

Since the communication network of the cyber-physical power system is responsible for communicating information, which guarantees the operation of the cyber-physical power system, researchers focus on the stability of the communication system. This article analyzes the risk of the communication transmission link interruption based on the network structure and characteristics of service transmission and proposes a path optimization method. First, we analyze the impact of link disruption on network structure and service, respectively, and quantify the impact as link interruption risk. According to the risk analysis, we propose an optimization method utilizing the Dijkstra’s algorithm and the genetic algorithm to reconfigure service paths, which aims to minimize time delay and realize the equilibrium of service distribution. Through a particular situation, we calculate the link interruption risk and use the optimization method to configure service path for affected service. The results show that the time delays of the optimized service paths are in the acceptable level as well as the balance index of the service distribution is decreased obviously. The simulation experiment reveals the operability of the risk analysis method and the effectiveness of the path optimization method, which provides a technical reference for risk analysis and service path configuration.

scholarly journals Stability Assessment and Optimization Design of Lakeside Open-Pit Slope considering Fluid-Solid Coupling Effect

2015 ◽  
Vol 2015 ◽  
pp. 1-11
Author(s):  
Wenchen Fan ◽  
Ping Cao ◽  
Ke Zhang ◽  
Kaihui Li ◽  
Chong Chen
Keyword(s):  
Slope Stability ◽  
Water Level ◽  
Lake Water ◽  
Optimization Design ◽  
Great Influence ◽  
Water Levels ◽  
Open Pit ◽  
Stability Of Slopes ◽  
The Stability ◽  
Slope Design

Chengmenshan copper mine, located at Jiujiang city in the Jiangxi Province, is a rarely lakeside open-pit mine in China. Since the open-pit is very close to Sai Lake, the seasonally changed water level and the distance between lake and slope have great influence to the stability of open-pit slope. Based on the drill data and geological sections, a numerical model of the slope is built. With the fluid-mechanical interaction associated, the stability of the slopes is numerically analyzed, in which different lake water levels and lake-slope distances are taken into consideration. The comparative analysis shows that a larger lake-slope distance can promise better slope stability and weaken the sensitivity of slope stability to water. The stability of slopes with different heights is analyzed to find that the stability weakens and the sensitivity is enhanced with the height increasing. To the most serious situation, the slope height and the lake water level being 238 m and 17.2 m, respectively, theFsvalue equals 1.18945 which is extremely closed to the allowable safety factor of 1.20 for slope design. According to the minimumFsfor slope design, the minimum distance between lake and open-pit slope is found to be 60 m.

scholarly journals ANALISIS STABILITAS DAN PERKUATAN LERENG MENGGUNAKAN PLAXIS2D DI DESA SUKARESMI, SUKABUMI, JAWA BARAT

2019 ◽  
Vol 5 (2) ◽  
Author(s):  
A'isyah Salimah ◽  
Muhammad Fathur Rouf Hasan ◽  
Suripto Suripto ◽  
Yelvi Yelvi ◽  
Imam H Sasongko
Keyword(s):  
Slope Stability ◽  
Safety Factor ◽  
Retaining Wall ◽  
Soil Surface ◽  
Retaining Walls ◽  
Environmental Damage ◽  
Field Investigations ◽  
Base Transceiver Station ◽  
The Stability ◽  
The Impact

Permukaan tanah tidak semua berbentuk bidang datar, namun memiliki perbedaan ketinggian dan kemiringan pada setiap daerah. Perbedaan ketinggian tanah mampu mengakitbatkan terjadinya pergerakan tanah yaitu longsor. Keberadaan bangunan base transceiver station (BTS) tower di Desa Sukaresmi, Cisaat, Sukabumi yang berada pada daerah lereng curam dengan kondisi retaining wall dan pagar dalam keadaan retak dan mengalami penurunan tanah menjadi salah satu faktor yang mengancam keselamatan. Untuk mengantisipasi dampak kerusakan lingkungan bertambah parah dibutuhkan penanganan khusus. Penelitian ini bertujuan untuk melakukan analisis stabilitas dan perkuatan lereng menggunakan software Plaxis2D. Adapun metode penelitian dilakukan dengan melakukan investigasi lapangan secara langsung, pengujian laboratorium, analisis stabilitas perkuatan lereng dengan software Plaxis2D serta rekomendasi perbaikan drainase. Upaya perkuatan lereng dengan mengganti dan memperdalam retaining wall existing. Hasil perkuatan lereng dapat meningkatkan nilai safety factor menjadi 1,369, nilai ini lebih besar dari safety factor existing sebesar 1,302. Kata kunci: cisaat, longsor, Plaxis2D, stabilitas lereng. The soil surface is believed to have differences in height and slope in each region. The different elevation could cause land movements namely landslides. The existence of tower base transceiver station (BTS) buildings in Sukaresmi Village, Cisaat,  Sukabumi on a deep slope area with cracked retaining walls and fences condition which experienced settlement is one of the factors that threaten safety. To anticipate the impact of environmental damage getting worse requires special handling. The aim  of this study is to analyze the stability and slope reinforcement using Plaxis2D software. The research method is carried out by conducting direct field investigations, laboratory tests, reinforced slope stability analysis with Plaxis2D software and drainage refinement recommendations. Countermeasures to strengthen the slope are done by replacing and deepening the existing retaining wall. The result of this measure is the increase of the safety factor value to 1,369, this value is greater than the value of the existing safety factor of 1,302. Keywords : cisaat, landslide, Plaxis2D, slope stability.

Sensitive Analysis of Factors Affecting Soil Slope Stability

2012 ◽  
Vol 170-173 ◽  
pp. 1072-1075
Author(s):  
Yong Chun Cheng ◽  
Ping Jiang
Keyword(s):  
Sensitivity Analysis ◽  
Slope Stability ◽  
Influence Factor ◽  
Influence Factors ◽  
Analysis Method ◽  
Factors Affecting ◽  
Safety Coefficient ◽  
Analysis Process ◽  
Sensitivity Analysis Method ◽  
Slope Design

In order to get better calculation parameters for slope stability analysis, as well as provide a better theoretical basis for slope design and reinforcement. In this paper, based on the single factor sensitivity analysis method, the finite difference strength reduction method was taken to calculate the slope safety coefficient when influence factors change. Sensitivity analysis process was explained through a numerical example, the calculation result shows that, influence factor sensitivity of slope stability is related to the value of influence factor.

scholarly journals Groundwater Effect on Slope Stability in Open Pit Mining: a Case of West Kutai Regency, East Kalimantan, Indonesia

2021 ◽  
Vol 6 (4) ◽  
pp. 192-205
Author(s):  
Shalaho Dina Devy ◽  
Pretty Permatasari Hutahayan
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Shear Strength ◽  
Slope Stability ◽  
Groundwater Modeling ◽  
Open Pit ◽  
The Finite Element Method ◽  
East Kalimantan ◽  
The Stability ◽  
The Impact

The stability of open pit slopes in Biangan district, West Kutai Regency, East Kalimantan Province, is greatly influenced by groundwater conditions. The existence of groundwater reduces the shear strength of the materials which causes a decrease in the stability value of pit slopes. The main objective of this study is to assess the impact of groundwater on the stability of the low wall and high wall pit mining. Groundwater modeling is used to determine the prediction of groundwater level on the pit slope which determines the value of the slope stability. Slope stability analysis in this study was performed using the Finite Element Method, producing output in the form of strain zones, deformation and displacement values. Therefore, the Strength Reduction Factor (SRF) approach was used, which is a gradual reduction of shear strength until the values of cohesion and friction angles reach minimums and the slopes are at a critical state. Groundwater modeling results indicate that groundwater flows to the Biangan river with hydraulic heads between 76 and 108 meters above sea level. Based on the analysis using the Finite Element Method, the stability values of the pit slopes, which are influenced by groundwater, are 0.65 on the low wall and 1.40 on the high wall. The total displacements are 0.019 meters on the low wall and 0.002 meters on the high wall.  The impact of groundwater on the slope is an increase in the slope load. This increases the materials’ thrust and reduces the shear strength of the materials which reduces the rock mass that can function as a water seepage path. Thus, the recommendation for low wall pit construction is a safety factor of 7.79 with a total displacement of 0.020 meters.

scholarly journals Linier Superposition Analysis on Managing Blasting Ground Vibration in Coal Mining

2019 ◽  
Vol 1 (1) ◽  
pp. 22-28
Author(s):  
Dhion Pradatama ◽  
Chani Pradasara ◽  
Syarif Nurdiansyah
Keyword(s):  
Wave Propagation ◽  
Coal Mining ◽  
Delay Time ◽  
Ground Vibration ◽  
Analysis Method ◽  
Ground Vibrations ◽  
Linear Superposition ◽  
Engineering Approach ◽  
Waste Energy ◽  
Principle Of Linear Superposition

One of the blasting process effect is ground vibration. Ground vibration currently consider as waste energy which it can infere and be an issue to the environment. PT. Multi Nitrotama Kimia as blasting service and explosives sales in Indonesia has customers dealing with that issues, one of them is PT Adaro Indonesia. To overcome the issue, engineering approach is done to the ground vibration by changing waste energy into work energy with the principle of linear superposition using the signature hole analysis (SHA) method to minimize the ground vibration. Researches and experiments are carried out using the Signature Hole Analysis (SHA) method to record wave propagation in each range of certain blocks - strips to the concern area. The recorded waves are analyzed with the Linear Superposition feature to obtain delay time recommendation along with the predicted vibration. The recommended delay time obtained is the delay time on inter-hole and inter-row which will be applied for next blasting.Based on the Signature Hole Analysis method, the recommended delay time given can be applied to accommodate the linear superposition wave principle. Its application can be optimized using inter-deck delay to minimize ground vibration produced. Its proven by ground vibrations produced using the recommendations always below the specified standard (PVS = &#60;2.00 mm / s).

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