Tunnelling through adverse geological condition: A case study

2012 ◽  
pp. 47-52 ◽  
Keyword(s):  
Geological Condition

scholarly journals Improving pre-drilling efficiency by analysing geological prospecting data: a case study of a project in Nanshan, Shenzhen

2020 ◽  
Vol 165 ◽  
pp. 03047
Author(s):  
Da Liu ◽  
Zheng Liu ◽  
Tianyu Chen
Keyword(s):  
Pile Foundation ◽  
Design Stage ◽  
Geological Condition ◽  
Optimal Length ◽  
Bored Pile ◽  
Bored Piles ◽  
The Cost ◽  
Rock Strata ◽  
Pile Length

Pre-drilling is a widely used technique to get the detailed geological condition at the location of the bored pile foundation prior to its construction. It is often a necessary step for bored piles supported by strata, as its results are helpful for finalizing the pile length in design stage, which often requires the pile to be embedded into the rock strata at certain depth. The aim of the paper is to find the optimal (normally the lowest) point of rock strata at the purposed pile location, so that the optimal length required for the pile can be determined. To achieve this, geological prospecting data of the site needs to be analysed and the optimal pre-drilling point needs to be determined. The model developed by this study is based on the geological prospecting data and the pre-drilling results of a real project with a sharp slope of strata. It is found that by using the method introduced in this study, higher accuracy results could be obtained with less pre-drilling works required, hence the time and the cost of pre-drilling can be greatly reduced.

scholarly journals Numerical Analysis of Longwall Gate-Entry Stability under Weak Geological Condition: A Case Study of an Indonesian Coal Mine

Energies ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 4710
Author(s):  
Takashi Sasaoka ◽  
Pisith Mao ◽  
Hideki Shimada ◽  
Akihiro Hamanaka ◽  
Jiro Oya
Keyword(s):  
Numerical Analysis ◽  
Coal Mine ◽  
Longwall Face ◽  
Geological Condition ◽  
Indonesian Coal ◽  
The Stability ◽  
Roof Support

The present research primarily focuses on the investigation of gate-entry stability of longwall trial panel under weak geological condition in Indonesia coal mine by means of numerical analysis. This work aims at identifying appropriate roof support at 100 m and 150 m of depth during gate development. Due to depth depending competency of dominant rock, the stability of gate-entry at 100 m of depth can be optimized by leaving at least 1 m of remaining coal thickness (RCT) above and below the gate-entry. The appropriate support for the trial panel gate-entry is steel arch SS540 with 1 m and 0.5 m spacing for 100 m and 150 m of depth, respectively. The influence of panel excavation on gate-entry is also discussed. Regarding the aforementioned influence, the utilization of additional gate mobile support is recommended at least 10 m from the longwall face.

scholarly journals Educational Institution on Responding Disasters in Palu of Indonesia

2019 ◽  
Author(s):  
Ismail Suardi Wekke ◽  
Rajindra Rajindra ◽  
Dinil Pushpalal ◽  
Muhammad Ahsan Samad ◽  
Ahmad Yani ◽  
...  
Keyword(s):  
Educational Institution ◽  
Geological Condition ◽  
National Agency ◽  
Case Study Methodology ◽  
Governmental Agencies ◽  
Rock Structure ◽  
Study Methodology ◽  
The Government ◽  
Increased Activity

The earthquakes that occur in the Indonesia are caused by several primary factors such as the tectonic plate shifts which lead to the increased activity of earthquakes and volcanoes. Moreover, the geological condition and the rock structure of swathes of Indonesia constitute the secondary factor that contributes to the danger of the disaster in Indonesia. Various disasters having occurred in the last 2 years are summarized in this article. This study was aimed to provide information concerning the history as well as attempts to cope with disasters and impacts on society following the disasters in Indonesia. The qualitative case study methodology was selected along with sources derived from various community groups as well as governmental agencies such as BNPB (The National Agency for Disaster Countermeasure) and BMKG (Meteorological, Climatological, and Geophysical Agency) that serve as a reference in this study. The results of the study delineated that the community’s response to the natural disasters led to increased security mitigation efforts made by the community and the government. In addition, it affected social relationship between communities in a positive manner evidenced by participation in helping with the post-disaster recovery.

scholarly journals Identification of Abnormal Processes with Spatial-Temporal Data Using Convolutional Neural Networks

Processes ◽  
2020 ◽  
Vol 8 (1) ◽  
pp. 73
Author(s):  
Yumin Liu ◽  
Zheyun Zhao ◽  
Shuai Zhang ◽  
Uk Jung
Keyword(s):  
Performance Comparison ◽  
Alternative Methods ◽  
Geological Condition ◽  
Temporal Data ◽  
Environment Pollution ◽  
Different Types ◽  
Process Operation ◽  
Modern Manufacturing ◽  
General Recognition

Identifying abnormal process operation with spatial-temporal data remains an important and challenging work in many practical situations. Although spatial-temporal data identification has been extensively studied in some domains, such as public health, geological condition, and environment pollution, the challenge associated with designing accurate and convenient recognition schemes is very rarely addressed in modern manufacturing processes. This paper proposes a general recognition framework for identifying abnormal process with spatial-temporal data by employing a convolutional neural network (CNN) model. Firstly, motivated by the pasting case study, the spatial-temporal data are transformed into process images for capturing spatial and temporal interrelationship. Then, the CNN recognition model is presented for identifying different types of these process images, leading to the identification of abnormal process with spatial-temporal data. The specific architecture parameters of CNN are determined step by step. According to the performance comparison with alternative methods, the proposed method is able to accurately identify the abnormal process with spatial-temporal data.

Construction Schedules Simulation and Prediction of Water Conveyance Tunnel Based on Karst Geological Condition

2012 ◽  
Vol 594-597 ◽  
pp. 1298-1301
Author(s):  
Lei Bi ◽  
Jia Qian Luo ◽  
Da Wei Tong
Keyword(s):  
Simulation Modeling ◽  
Simulation Analysis ◽  
Real Case ◽  
Tunnel Construction ◽  
Geological Condition ◽  
Construction Process ◽  
Water Conveyance ◽  
Construction Schedules ◽  
Water Conveyance Tunnel

The construction process of water conveyance tunnel is complex and stochastic under the karst geological condition. Aiming at analyzing the construction process under this special condition, a simulation modeling method of water conveyance tunnel construction is presented. Through demonstrating the simulation analysis and predicting the schedules in a real case study of a water conveyance tunnel, this method is proved advanced and intuitive for formulating and analyzing the construction schedules under the karst geological condition.

The Genesis and Internal Dynamics of El Salvador's People's Revolutionary Army, 1970–1976

2014 ◽  
Vol 38 (01) ◽  
pp. 102-129
Author(s):  
ALBERTO MARTÍN ÁLVAREZ ◽  
EUDALD CORTINA ORERO
Keyword(s):  
Latin America ◽  
El Salvador ◽  
Early Years ◽  
Left Wing ◽  
Internal Dynamics ◽  
Internal Coherence ◽  
The 1960S

AbstractUsing interviews with former militants and previously unpublished documents, this article traces the genesis and internal dynamics of the Ejército Revolucionario del Pueblo (People's Revolutionary Army, ERP) in El Salvador during the early years of its existence (1970–6). This period was marked by the inability of the ERP to maintain internal coherence or any consensus on revolutionary strategy, which led to a series of splits and internal fights over control of the organisation. The evidence marshalled in this case study sheds new light on the origins of the armed Salvadorean Left and thus contributes to a wider understanding of the processes of formation and internal dynamics of armed left-wing groups that emerged from the 1960s onwards in Latin America.

Culture and the plasticity of perception

2020 ◽  
Vol 43 ◽  
Author(s):  
Michael Lifshitz ◽  
T. M. Luhrmann
Keyword(s):  
Cultural Context ◽  
Sensory Experience ◽  
Cultural Learning ◽  
The World

Abstract Culture shapes our basic sensory experience of the world. This is particularly striking in the study of religion and psychosis, where we and others have shown that cultural context determines both the structure and content of hallucination-like events. The cultural shaping of hallucinations may provide a rich case-study for linking cultural learning with emerging prediction-based models of perception.

Dual systems for all: Higher-order, role-based relational reasoning as a uniquely derived feature of human cognition

2019 ◽  
Vol 42 ◽  
Author(s):  
Daniel J. Povinelli ◽  
Gabrielle C. Glorioso ◽  
Shannon L. Kuznar ◽  
Mateja Pavlic
Keyword(s):  
Temporal Reasoning ◽  
Higher Order ◽  
Important Case ◽  
Human Cognition ◽  
Relational Reasoning ◽  
Dual Systems ◽  
First Order ◽  
Reasoning System ◽  
Role Based

Abstract Hoerl and McCormack demonstrate that although animals possess a sophisticated temporal updating system, there is no evidence that they also possess a temporal reasoning system. This important case study is directly related to the broader claim that although animals are manifestly capable of first-order (perceptually-based) relational reasoning, they lack the capacity for higher-order, role-based relational reasoning. We argue this distinction applies to all domains of cognition.

Sociocultural memory development research drives new directions in gadgetry science

2019 ◽  
Vol 42 ◽  
Author(s):  
Penny Van Bergen ◽  
John Sutton
Keyword(s):  
Episodic Memory ◽  
Autobiographical Memory ◽  
Developmental Psychology ◽  
Cross Cultural ◽  
Memory Development ◽  
Development Research ◽  
Cultural Research ◽  
New Directions ◽  
Cross Cultural Research

Abstract Sociocultural developmental psychology can drive new directions in gadgetry science. We use autobiographical memory, a compound capacity incorporating episodic memory, as a case study. Autobiographical memory emerges late in development, supported by interactions with parents. Intervention research highlights the causal influence of these interactions, whereas cross-cultural research demonstrates culturally determined diversity. Different patterns of inheritance are discussed.

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