scholarly journals Monitoring and measurement analysis of key indexes for the implementation of mining, dressing, backfilling, and controlling technology in coal resources—A case study of Tangshan Mine

2022 ◽  
Author(s):  
Zhang Qiang ◽  
Kang Yang ◽  
Jixiong Zhang ◽  
Yin Wei ◽  
Xianwei Liu ◽  
...  
Keyword(s):  
Coal Resources ◽  
Measurement Analysis ◽  
Monitoring And Measurement

Vibration source properties of cargo trains: free field vibration and trackside measurement analysis

2021 ◽  
Vol 263 (2) ◽  
pp. 4652-4659
Author(s):  
Eliam Vlijm
Keyword(s):  
Free Field ◽  
Vibration Measurement ◽  
Vibration Source ◽  
Mean Square ◽  
Vibration Level ◽  
Vibration Signals ◽  
Measurement Analysis ◽  
Train Speed ◽  
Rail Deflection

Annoyance caused by railway operations has gained increasing attention in the Netherlands. This has led to a multimillion research project into different aspects of train passages as a source of vibration. The project is initiated by the Dutch railway operator ProRail. In advance of this project a study has been performed on vibration signals at free field caused by cargo train passages at four different sites. The signals have been compared to trackside measurements. The trackside measurements consist of fibre optic measurements of the rail deflection at pre-installed locations different from the free field vibration measurement sites. Different vibration level indicators have been studied like train speed, axle loads and wheel roughness indicators and their correlation with vibration levels. Vibration levels are defined in several ways, a frequency weighted running mean square value (so-called Veffmax), a 2-second RMS level (unweighted) and levels per frequency band. Special attention is given to the variation in time of the measured vibration signals during the train passage to see whether 'bad quality' wheel passages can be identified. The results give valuable input for a future case study in which wheel quality and its influence on vibration levels will be studied further.

scholarly journals Study on Efficient Utilization Technology of Coal Pillar Based on Gob-Side Entry Driving in a Coal Mine with Great Depth and High Production

2019 ◽  
Vol 11 (6) ◽  
pp. 1706 ◽  
Author(s):  
Xinyue Li ◽  
Nong Zhang ◽  
Zhengzheng Xie ◽  
Dongxu Liang ◽  
Yiming Zhao
Keyword(s):  
Renewable Resources ◽  
Coal Pillar ◽  
Great Depth ◽  
Efficient Utilization ◽  
Key Technology ◽  
Coal Resources ◽  
High Production ◽  
Efficient Recovery ◽  
Pillar Size

Improving the utilization of non-renewable resources takes a crucial position in circular economy. Gob-side entry driving technology has been widely applied in coal mines in China, such as in the Shilawusu mine (Ordos City, Inner Mongolia), here considered as a case study due to its high safety and resource-recovery rate. However, at present the complexity of coal pillar utilization makes it hard to fully master the key technology for coal pillar size design, which leads to huge waste of coal resources. Based on theoretical calculation and numerical simulation, this study analyzed the basic mechanical structure of coal pillar and the characteristics of its weakening failure, providing theoretical reference for efficient recovery of coal resources. In general, results of this study can be helpful in pursuing the efficient, hence sustainable, development of mines with Gob-side entry driving technology.

Simulating the impact of coal seam gas water production on aquifers

2012 ◽  
Vol 52 (1) ◽  
pp. 545 ◽  
Author(s):  
Julian Strand ◽  
Reem Freij-Ayoub ◽  
Shakil Ahmed
Keyword(s):  
Coal Seam ◽  
Electricity Production ◽  
Water Production ◽  
Hypothetical Case ◽  
Coal Seam Gas ◽  
Coal Resources ◽  
Victorian Department ◽  
Gippsland Basin ◽  
The Impact

Derived from a larger scale project, which studied geomechanical issues associated with coal seam gas (CSG) production, this paper investigates a hypothetical case study based on the Latrobe Valley, Gippsland Basin, Victoria. The paper focuses on examining aquifer water management associated with CSG production-related water extraction. As such, the paper limits itself to determining the volume of water production from a hypothetical case study area in the Latrobe Valley. A simplistic property model and methane production strategy has been used. The impact of extraction of this water on the hydraulic head in aquifers underlying the produced seams is quantified. The Latrobe Valley Depression contains 129,000 million tonnes of coal resources and is one of the world’s largest, and lowest cost, energy sources. Most of Victoria’s electricity is generated using coal from the Loy Yang, Morwell and Yallourn mines. In addition to these massive operations, significant additional coal resources are available and unallocated at this time. Opportunities exist for the continued usage of these resources for electricity production, gasification, liquefaction and other coal conversion processes, as well as solid fuel for industrial, domestic and other uses. The existence of data from the Victorian Department of Primary Industries 2003 coal resource model was the main reason for the selection of the case study, and their data was used to form a model of the stratigraphy of the Latrobe Valley. Aquifer models were simulated in MODFLOW, based on extraction figures modelled in the CSG simulator COMET3.

scholarly journals The Journey of Adopting Lean Six Sigma – from the Implementation Team’s Perspective: A Case Study

2020 ◽  
Vol 5 (2) ◽  
pp. 232-245
Author(s):  
Nicoleta Dorina RACOLȚA-PAINA ◽  
◽  
Nicolae Sebastian BUNEA ◽  
Keyword(s):  
Performance Improvement ◽  
Customer Service ◽  
Six Sigma ◽  
Lean Six Sigma ◽  
Primary Data ◽  
Implementation Team ◽  
Operational Costs ◽  
Measurement Analysis ◽  
Long Duration

This paper proposes a case study undertaken within a Romanian company which adopted Lean Six Sigma (LSS) Methodology. The research objectives pursued are the identification of the way in which this process has proceeded, from the implementation team’s perspective. The primary data collected while interviewing them target both the positive and the negative aspects, as well as the benefits and the elements that still need improvement as part of the process of LSS implementation. The conclusions of our research indicate some of the positive aspects of Company A’s “journey” towards LSS namely: a totally committed management, well trained employees, openness to change from the implementation team and from part of the employees, and also the external consultant’s involvement when this was needed. The less positive aspects of the researched process were given by the need to get some of the instruments adjusted (these being specific to the field of production, as the researched team provides products, solutions and electro-technical and mechanical services), the lack of experience regarding LSS from the large majority of the members of the implementation team, and also the long duration of the Analysis stage as part of the D.M.A.I.C. Methodology (Defining, Measurement, Analysis, Implementation, Control) given the large quantity of data. One essential aspect identified is that, in the case of Company A, LSS implementation led to the desired results that is to the change of the organizational culture, to the reducing of operational costs and to performance improvement, and also to improving customer service.

scholarly journals Analisis Pengukuran Kinerja Koperasi Tani Duta Kartika Kencana dengan Pendekatan Balanced Scorecard

2021 ◽  
Vol 31 (11) ◽  
pp. 2853
Author(s):  
I Gede Candra Kusuma ◽  
I Ketut Suryanawa
Keyword(s):  
Data Analysis ◽  
Comparative Analysis ◽  
Performance Appraisal ◽  
Balanced Scorecard ◽  
Business Processes ◽  
The Balanced Scorecard ◽  
Analysis Techniques ◽  
Measurement Analysis ◽  
Financial Aspect

Balanced scorecard research is based on various theories and backgrounds in different places. The research was conducted at the Duta Kartika Kencana Farmer's Cooperative, which still performs traditional measurements, which only looks at the financial aspect so that it is not in accordance with the targets to be achieved by the cooperative. Performance measurement based on the balanced scorecard is the goal of this research, especially at the Duta Kartika Kencana Farmers Cooperative. This type of research is a case study. Descriptive and comparative analysis are data analysis techniques. Finance, customers, internal business processes as well as learning and growth into a balanced scorecard perspective. Based on the results of the measurement analysis that has been carried out, it shows that the performance of the Duta Kartika Kencana Farmers Cooperative as a whole is quite good, this is shown from the scores generated by each perspective. Keywords : Balanced Scorecard; Cooperative; Performance Appraisal.

Crack length measurement: Analysis of the electropotential method using a finite element method

1986 ◽  
Vol 21 (3) ◽  
pp. 127-134 ◽  
Author(s):  
D W J Pulle
Keyword(s):  
Crack Length ◽  
Numerical Method ◽  
Crack Growth ◽  
Exact Representation ◽  
Measurement Analysis ◽  
Voltage Probe ◽  
Potential Reading ◽  
The Relationship ◽  
Crack Length Measurement

An evaluation of the electropotential method for deriving the crack length in a sheet metal specimen is carried out. Comparisons are made between an existing analytical and numerical method for calculating the relationship between electropotential and crack length. The numerical method allows an exact representation of the specimen geometry which enables the influence of asymmetrical crack growth on the electropotential to be examined. A case study to analyse this effect on the electropotential is discussed which indicates that underestimation of the crack length will occur which becomes increasingly significant as the voltage probes across which the electropotential is measured are placed closer to the crack. The paper shows that a compromise must be made with regard to voltage probe positioning between the desired sensitivity of the potential reading and tolerated vulnerability to asymmetric crack growth. Comparisons between experimental and theoretical derived potential crack length relationships indicate that limited crack length accuracy is obtained in case the latter is calculated on the basis of the measured electropotential.

scholarly journals Physical Measurement Analysis in Pre-Utility Covid-19 Isolation Room: A Case Study Universitas Mataram Teaching Hospital

2021 ◽  
Vol 7 (2) ◽  
pp. 1
Author(s):  
Eustachius Hagni Wardoyo ◽  
Ida Bagus Alit ◽  
Monalisa Nasrul ◽  
Didit Yudhanto ◽  
Prima Belia Fathana ◽  
...  
Keyword(s):  
Teaching Hospital ◽  
Negative Pressure ◽  
Pressure Gauge ◽  
Physical Measurement ◽  
Physical Measure ◽  
Isolation Room ◽  
Measurement Analysis ◽  
The Mean ◽  
The Difference

Background: Negative pressure room is recommended for the treatment of COVID-19 patients. Aim this study to describe physical measurement analysis of isolation room Universitas Mataram Teaching Hospital. Methods: Newly developed negative pressure isolation room was physical measure using following instruments: anemometer, moisture meter, hygrometer and pressure gauge.  Results: This study showed physical measurement as follow: 1) ACH (air change per hour) 23.3 / hour [minimum: 12+ ACH]; 2) the difference in pressure gradient between the inpatient room and anteroom -30 Pa [minimum -15 Pa]; 3) the mean of air temperature 24.8°C [21-24]; 4) air humidity 58% [maximum 65%] and 5) concrete moisture 22.45%. Conclusion: The COVID-19 isolation room at the Universitas Mataram Teaching Hospital meets the standard criteria.

scholarly journals SHARING WALL PROJECT SEBAGAI BENTUK UPAYA KONSERVASI SUMBERDAYA BATUBARA

2020 ◽  
Vol 1 (1) ◽  
pp. 785-796
Author(s):  
Herri Lubis
Keyword(s):  
Coal Resources ◽  
Technical Management ◽  
Left Behind ◽  
The Government ◽  
Coal Reserves ◽  
Laws And Regulations

ABSTRAK Salah satu bentuk usaha konservasi sumberdaya mineral dan batubara (seperti yang diamanatkan dalam PP No. 55 Tahun 2010) adalah pengelolaan dan atau pemanfaatan cadangan marginal. Contoh pemanfaatan cadangan marginal ini adalah dengan memaksimalkan penambangan cadangan batubara di perbatasan antara 2 (dua) atau beberapa konsesi yang saling bersinggungan. Cadangan batubara di perbatasan ini seringkali ditinggal karena beberapa pertimbangan dari pemegang konsesi. Dalam makalah ini menggunakan studi kasus pada penambangan bersama di Izin Usaha Pertambangan (IUP) PT Banjarsari Pribumi (PTBP) dan IUP PT Budi Gema Gempita (PTBGG) di Kabupatan Lahat, Sumatera Selatan. Kerjasama penambangan di perbatasan konsesi yang saling bersinggungan ini dinamakan dengan “Sharing Wall Project”. Tujuan dari penulisan makalah ini adalah memberikan informasi dan panduan kepada para pemegang konsesi yang saling berimpitan dalam melakukan kerjasama penambangan sesuai dengan peraturan perundangan yang berlaku. Sampai saat ini “Sharing Wall Project” antara IUP PTBP dan PTBGG ini sudah menambang batubara sebesar 350,000 ton dari Sharing Wall Project ini untuk masing-masing konsesi. Dengan “Sharing Wall Project” ini berpotensi adanya penambahan cadangan marginal sebesar 1,000,000 ton yang bisa ditambang untuk masing-masing IUP. Artinya akan tambahan royalti yang dibayarkan ke pemerintah dari kedua IUP ini. Penambangan perbatasan IUP sudah diatur dalam Kepmen ESDM No. 1827K/30/MEM/2018 Pada Lampiran II Mengenai Pedoman Pengelolaan Teknis Pertambangan Kata Kunci: Sharing Wall Project, konservasi, cadangan marginal, royalti.  ABSTRACT  One of conservation efforts for mineral and coal resources (as mandated in PP No. 55 of 2010) is the management and or utilization of marginal reserves. An example of utilizing this marginal reserve is by maximizing the mining of coal reserves at the boundary between 2 (two) or several conflicting concessions. Coal reserves at this border are often left behind due to several considerations from concession holders. This paper uses a case study on joint mining in the PT Banjarsari Pribumi (PTBP) and PT Budi Gema Gempita (PTBGG) in Lahat Regency, South Sumatra. Mining cooperation at the intersection of concessions that coincide with each other is called the "Sharing Wall Project". The purpose of writing this paper is to provide information and guidance to concession holders who coincide with each other in conducting mining cooperation in accordance with applicable laws and regulations. Until now the "Sharing Wall Project" between PTBP and PTBGG has mined 350,000 tons of coal from the Sharing Wall Project for each concession. With this "Sharing Wall Project" it has the potential to increase marginal reserves of 1,000,000 tons that can be mined for each concession. This means that additional royalties will be paid to the government from these two concessions. Concessions border mining has been regulated in ESDM Decree No. 1827K / 30 / MEM / 2018 in Appendix II Concerning Guidelines for Mining Technical Management  Keywords: Sharing Wall Project, conservation, marginal reserves, royalties.  

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