Journal of Korean Society for Rock Mechanics最新文献_第9页

A Numerical Study on the Correlation between Joint Roughness and Hydraulic Characteristics 节理粗糙度与水力特性相关性的数值研究

Journal of Korean Society for Rock Mechanics Pub Date : 2014-04-30 DOI: 10.7474/TUS.2014.24.2.176

Seung-Joong Lee, Byung-ryeol Kim, Sung O. Choi

{"title":"A Numerical Study on the Correlation between Joint Roughness and Hydraulic Characteristics","authors":"Seung-Joong Lee, Byung-ryeol Kim, Sung O. Choi","doi":"10.7474/TUS.2014.24.2.176","DOIUrl":"https://doi.org/10.7474/TUS.2014.24.2.176","url":null,"abstract":"Roughness, aperture and filling material of rock joint are widely considered to affect the hydraulic characteristics of joint. Among these factors, in this study, the joint roughness was examined with artificial joint profiles generated by Monte Carlo simulating on the original profiles suggested by Barton and Choubey(1977). Original profiles and revised profiles were combined to establish flow channel models, in which the hydraulic characteristics were analyzed numerically on the basis of minimum aperture changes and flow channel shapes. Maximum flow rate was identified at the growing point of flow area after passing through minimum aperture generated by the two profiles, and it was resulted that maximum flow rate is inversely proportional to minimum aperture. Maximum flow rate per unit area showed different values because flow channel shapes and minimum aperture locations are different in each model. In flow channel, mechanical aperture showed approximately 1.07 ~ 3.00 times larger than hydraulic aperture. In this study, mechanical and hydraulic aperture were concluded to be closely related to  value, and their relations can be denoted by     and     ,","PeriodicalId":437780,"journal":{"name":"Journal of Korean Society for Rock Mechanics","volume":"115 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114961720","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development of a Windows-based Simulation Program for Selecting Equipments in Open-pit Shovel-Truck Haulage Systems 露天矿铲车运输系统设备选型仿真程序的开发

Journal of Korean Society for Rock Mechanics Pub Date : 2014-04-30 DOI: 10.7474/TUS.2014.24.2.111

Sebeom Park, Sungjae Lee, Yosoon Choi, Han-Su Park

{"title":"Development of a Windows-based Simulation Program for Selecting Equipments in Open-pit Shovel-Truck Haulage Systems","authors":"Sebeom Park, Sungjae Lee, Yosoon Choi, Han-Su Park","doi":"10.7474/TUS.2014.24.2.111","DOIUrl":"https://doi.org/10.7474/TUS.2014.24.2.111","url":null,"abstract":"Abstract This study developed a Windows-based simulation program for selecting equipments in open-pit shovel-truck haulage systems. Visual Basic.NET 2012 was used to develop the graphic user interface (GUI) and the GPSS/H simulation language was utilized to implement the simulation engine of program. When users establish simulation parameters through the GUI, the program calls the simulation engine to perform the simulations repeatedly. Then, it finds the optimal fleet of equipments required for operating the open-pit shovel-truck haulage systems efficiently. Application of the program to the Ssangyong open-pit limestone mine, Gangwon-do, Korea, showed that the daily average profit of shovel-truck haulage operation can be maximized (i.e. 88,552 USD) under following conditions: (a) 4 trucks are dispatched into each loading point and (b) a crusher with capacity of 1,500 tph is utilized. Key words Open-pit mine, Shovel-truck haulage system, Equipment selection, GPSS/H초 록 본 연구에서는 노천광산 쇼밸 -트럭 운반 시스템의 장비선택을 위해 활용할 수 있는 Windows용 시뮬레이션 프로그램을 개발하였다 . Visual Basic.NET 2012를 이용하여 프로그램의 그래픽 사용자 인터페이스를 개발하였고, GPSS/H 시뮬레이션 언어를 이용하여 시뮬레이션 엔진을 구현하였다 . 사용자가 그래픽 사용자 인터페이스를 통해 시뮬레이션 조건을 설정하면 , 프로그램은 시뮬레이션을 반복적으로 수행하기 위해 시뮬레이션 엔진을 호출하며 운반 시스템을 가장 효율적으로 운영할 수 있는 장비의 조합을 분석하여 사용자에게 알려준다 . 개발된 프로그램을 강원도에 위치한 (주) 쌍용자원개발 동해 석회석 노천광산에 적용한 결과 각각의 적재지점에 대하여 트럭을 4대씩 배차하고 1,500 tph 처리용량을 가진 파쇄기를 사용할 때 쇼밸 -트럭 운반 작업의 하루 평균 수익을 88,552 USD로 최대화할 수 있는 것으로 나타났다 .핵심어 노천광산, 쇼밸-트럭 운반 시스템 , 장비선택, GPSS/H","PeriodicalId":437780,"journal":{"name":"Journal of Korean Society for Rock Mechanics","volume":"135 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128105707","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 13

A Study on Evaluation of Thermal Environment using Heat Stress Indices for Deep Coal Mine in Korea 韩国深部煤矿热环境热应力指标评价研究

Journal of Korean Society for Rock Mechanics Pub Date : 2014-04-30 DOI: 10.7474/TUS.2014.24.2.166

Seon-Oh Park, Jang-hoon Roh, Jin Kim

引用次数: 3

Review of Subaqueous Tunneling Case Histories 水下隧道工程案例回顾

Journal of Korean Society for Rock Mechanics Pub Date : 2014-04-30 DOI: 10.7474/TUS.2014.24.2.120

Seung-Beum Choi, Sudeuk Lee, Hyunwoo Kim, S. Jeon

引用次数: 0

Analysis of the Optimal Separation Distance between Multiple Thermal Energy Storage (TES) Caverns Based on Probabilistic Analysis 基于概率分析的多个储热洞室最佳间隔距离分析

Journal of Korean Society for Rock Mechanics Pub Date : 2014-04-30 DOI: 10.7474/TUS.2014.24.2.155

Dohyun Park, Hyunwoo Kim, Jung-Wook Park, E. Park, C. Sunwoo

{"title":"Analysis of the Optimal Separation Distance between Multiple Thermal Energy Storage (TES) Caverns Based on Probabilistic Analysis","authors":"Dohyun Park, Hyunwoo Kim, Jung-Wook Park, E. Park, C. Sunwoo","doi":"10.7474/TUS.2014.24.2.155","DOIUrl":"https://doi.org/10.7474/TUS.2014.24.2.155","url":null,"abstract":"Multiple thermal energy storage (TES) caverns can be used for storing thermal energy on a large scale and for a high-aspect-ratio heat storage design to provide good thermal performance. It may also be necessary to consider the use of multiple caverns with a reduced length when a single, long tunnel-shaped cavern is not suitable for connection to aboveground heat production and injection equipments. When using multiple TES caverns, the separation distance between the caverns is one of the significant factors that should be considered in the design of storage space, and the optimal separation distance should be determined based on a quantitative stability criterion. In this paper, we described a numerical approach for determining the optimal separation distance between multiple caverns for large-scale TES utilization. For reliable stability evaluation of multiple caverns, we employed a probabilistic method which can quantitatively take into account the uncertainty of input parameters by probability distributions, unlike conventional deterministic approaches. The present approach was applied to the design of a conceptual TES model to store hot water for district heating. The probabilistic stability results of this application demonstrated that the approach in our work can be effectively used as a decision-making tool to determine the optimal separation distance between multiple caverns. In addition, the probabilistic results were compared to those obtained through a deterministic analysis, and the comparison results suggested that care should taken in selecting the acceptable level of stability when using deterministic approaches.","PeriodicalId":437780,"journal":{"name":"Journal of Korean Society for Rock Mechanics","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121459737","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Influence of Delay Time and Priming Location on the Blast-Induced Ground Vibration 延迟时间和起爆位置对爆炸诱发地面振动的影响

Journal of Korean Society for Rock Mechanics Pub Date : 2014-02-28 DOI: 10.7474/TUS.2014.24.1.097

Choo-Won Kang, Bok Hyun Ryu, Tae Hong Choi

{"title":"Influence of Delay Time and Priming Location on the Blast-Induced Ground Vibration","authors":"Choo-Won Kang, Bok Hyun Ryu, Tae Hong Choi","doi":"10.7474/TUS.2014.24.1.097","DOIUrl":"https://doi.org/10.7474/TUS.2014.24.1.097","url":null,"abstract":"Abstract In order to identify the characteristics of the propagation depending on delay time (20, 25 ms) and priming location (top priming, middle priming, bottom priming), test blasts were carried out a total of 4 times using different spacing, burden, drilling length, charge per delay and was derived the formula to predict blast vibration. This study investigated the characteristics of vibration by analysis of the nomogram and prediction of Peak Particle Velocity (PPV) from delay time and priming location by the formula to predict ground vibration. And it analyzed the trends of vibration increase by standards charge 0.5, 1.6, 5, 15 kg. Standards charge is “Blasting design and construction guidelines to road construction” by the Ministry of Land, Infrastructure and Transport. Depending on the charge in favor of vibration control method is proposed. Thus, when the design was to be used as a variable. Key words Delay time, Priming location, Ground vibration, PPV초 록 본 연구는 현재 제품화 되고 있는 뇌관의 지연시차인 20, 25 ms의 지연시차와 기폭위치 (정기폭, 중간기폭, 역기폭)에 따라 발파에 의한 지반진동의 전파특성을 파악하기 위해 공간격 , 저항선, 천공장 그리고 장약량을 달리하여 총 4회의 시험발파를 실시하여 지반진동 예측식을 도출하였다 . 도출된 평균 지반진동 예측식을 통해 지연시차와 기폭위치에 따른 최대입자속도의 노모그램 분석을 통해 진동특성을 규명하였고 , 국토교통부의 “도로공사 노천발파 설계 시공 지침 및 요령 ”에 제시된 표준발파공법의 공법별 경계 기준 장약량인 0.5, 1.6, 5, 15 kg을 적용하여 진동중가율을 비교분석하였다 . 그리하여 장약량에 따라 진동제어에 유리한 발파방법을 제안하여 발파설계의 인자로 사용할 수 있도록 하였다.핵심어 지연시차, 기폭위치, 지반진동, 최대입자속도","PeriodicalId":437780,"journal":{"name":"Journal of Korean Society for Rock Mechanics","volume":"135 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122491948","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

A Study on Shear Strength under Constant Normal Load Conditions by Using 3DEC 恒法向荷载条件下3DEC抗剪强度研究

Journal of Korean Society for Rock Mechanics Pub Date : 2014-02-28 DOI: 10.7474/TUS.2014.24.1.046

Young-Mok Noh, H. Mun, Ki-ho Kim, Won-Yil Jang

引用次数: 0

Influence of Joint Secondary Roughness on Roughness Parameter in Direct Shear Test 节理二次粗糙度对直剪试验粗糙度参数的影响

Journal of Korean Society for Rock Mechanics Pub Date : 2014-02-28 DOI: 10.7474/TUS.2014.24.1.089

Deok-Hwan Lee, Sung O. Choi

引用次数: 0

A Study on Relationship Between Basic Frictional Angle and Mineral Composition for Granite Sample 花岗岩试样基本摩擦角与矿物组成关系的研究

Journal of Korean Society for Rock Mechanics Pub Date : 2014-02-28 DOI: 10.7474/TUS.2014.24.1.032

Bong-Hyun Lee, Seung-Joong Lee, Sung O. Choi

引用次数: 3

Optimal Routes Analysis of Vehicles for Auxiliary Operations in Open-pit Mines using a Heuristic Algorithm for the Traveling Salesman Problem 基于旅行推销员问题启发式算法的露天矿辅助作业车辆最优路线分析

Journal of Korean Society for Rock Mechanics Pub Date : 2014-02-28 DOI: 10.7474/TUS.2014.24.1.011

Boyoung Park, Yosoon Choi, Han-Su Park

{"title":"Optimal Routes Analysis of Vehicles for Auxiliary Operations in Open-pit Mines using a Heuristic Algorithm for the Traveling Salesman Problem","authors":"Boyoung Park, Yosoon Choi, Han-Su Park","doi":"10.7474/TUS.2014.24.1.011","DOIUrl":"https://doi.org/10.7474/TUS.2014.24.1.011","url":null,"abstract":"Abstract This study analyzed the optimal routes of auxiliary vehicles in an open-pit mine that need to traverse the entire mine through many working points. Unlike previous studies which usually used the Dijkstra‘s algorithm, this study utilized a heuristic algorithm for the Traveling Salesman Problem(TSP). Thus, the optimal routes of auxiliary vehicles could be determined by considering the visiting order of multiple working points. A case study at the Pasir open-pit coal mine, Indonesia was conducted to analyze the travel route of an auxiliary vehicle that monitors the working condition by traversing the entire mine without stopping. As a result, we could know that the heuristic TSP algorithm is more efficient than intuitive judgment in determining the optimal travel route; 20 minutes can be shortened when the auxiliary vehicle traverses the entire mine through 25 working points according to the route determined by the heuristic TSP algorithm. It is expected that the results of this study can be utilized as a basis to set the direction of future research for the system optimization of auxiliary vehicles in open-pit mines.","PeriodicalId":437780,"journal":{"name":"Journal of Korean Society for Rock Mechanics","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115741527","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3