scholarly journals Determining the operating parameters of machine systems in potash mines when tunneling with stope back partial section

2020 ◽  
pp. 105-112
Author(s):  
Mikhail S. Ozornin ◽  
Keyword(s):  
Lower Layer ◽  
System Capacity ◽  
Magnesium Salt ◽  
Operating Parameters ◽  
Salt Deposit ◽  
Cross Sectional ◽  
Machine System ◽  
Geological Conditions ◽  
Machine Systems ◽  
Full Face

Introduction. Heading and winning machine system operation has been considered in the conditions of the Upper Kama (Verkhnekamskoe) potassium and magnesium salt deposit. Excavation of producing formations with the thickness of more than 4 m is carried out in two moves. The lower layer is excavated by the second move, while the area of the stope back is usually less than the cross-sectional area of the machine’s executive body. In this case, the heading and winning machine does not have a full face. Typical calculation methods contain no information for determining the operating parameters of machine systems at potash mines when tunneling with stope back partial section. Research methodology. The methodological foundations of a machine system capacity determination in the conditions of the Upper Kama potassium and magnesium salt deposit are described. The calculation of the main parameters characterizing the operation of the machine system when tunneling with stope back partial section. Results. Based on the identified dependencies, it is possible to determine the rational type of machine system equipment, the rate of hauling the machine to the face, and rational delivery distances based on equipment type and geological conditions. Summary. The proposed method of a machine system’s operating parameters determination in potash mine when tunneling with stope back partial section can be adapted and used in potash mines with various mining and geological and mining conditions to determine the capacity of machine systems.

Predicting Graceful Extensibility of Human-Machine Systems: A New Analysis Method for Evaluating Extensibility Plots to Anticipate Distributed System Performance

2020 ◽  
Vol 64 (1) ◽  
pp. 313-318
Author(s):  
Dane A. Morey ◽  
Jesse M. Marquisee ◽  
Ryan C. Gifford ◽  
Morgan C. Fitzgerald ◽  
Michael F. Rayo
Keyword(s):  
Artificial Intelligence ◽  
Distributed System ◽  
System Performance ◽  
Healthcare Setting ◽  
Evaluation Methods ◽  
Performance Data ◽  
Analysis Method ◽  
Machine System ◽  
Machine Systems

With all of the research and investment dedicated to artificial intelligence and other automation technologies, there is a paucity of evaluation methods for how these technologies integrate into effective joint human-machine teams. Current evaluation methods, which largely were designed to measure performance of discrete representative tasks, provide little information about how the system will perform when operating outside the bounds of the evaluation. We are exploring a method of generating Extensibility Plots, which predicts the ability of the human-machine system to respond to classes of challenges at intensities both within and outside of what was tested. In this paper we test and explore the method, using performance data collected from a healthcare setting in which a machine and nurse jointly detect signs of patient decompensation. We explore the validity and usefulness of these curves to predict the graceful extensibility of the system.

Construction and operation of batching plants in difficult geological conditions of Upper Kama potash mines

2021 ◽  
pp. 51-56
Author(s):  
V. N. Aptukov ◽  
V. V. Tarasov ◽  
V. S. Pestrikova ◽  
O. V. Ivanov
Keyword(s):  
Crack Opening ◽  
Concrete Lining ◽  
Salt Deposit ◽  
Mine Shaft ◽  
Deformation And Fracture ◽  
Geological Conditions ◽  
Negative Impacts ◽  
Long Term Experience ◽  
Term Maintenance

Scenarios of the component arrangement of batching plants in the system of a vertical mine shaft are discussed. The features of operation of batching plants in vertical shafts of potash mines are identified. The actual recorded damages generated in the lining of batching plants in the course of their longterm operation in potash mines are described. The geomechanical researches aimed to determine vertical convergence in batching rooms of mine shafts, as well as for monitoring of crack opening and displacements in sidewalls in the batching chambers are presented. The major results of the full-scale geomechanical observations are reported, and the main causes of fractures in concrete and reinforced concrete lining at junctures of shafts and batching rooms and shaft bins are identified. The set of the engineering solutions implemented for the protection of lining in batching facilities during construction of mine shafts is described, and its efficiency is evaluated. The mathematical modeling is carried out to estimate various negative impacts on deformation and fracture of concrete lining in shafts with regard to the time factor. From the modeling results, the dominant cause of concrete lining damage in batching chambers and in mine shaft is found. Based on the accomplished research results and actual long-term experience of operation of mine shafts, the most favorable factors are determined for the best design choices in construction and long-term maintenance-free operation of batching plants in potash mines of the Upper Kama Potash–Magnesium Salt Deposit.

scholarly journals Pengaruh penggunaan helm terhadap cedera kraniofasial berdasarkan skor FISS dan CT Marshall

2017 ◽  
Vol 9 (2) ◽  
Author(s):  
Hendrik Mengga ◽  
Mendy Hatibie ◽  
Eko Prasetyo ◽  
Maximillian Ch. Oley
Keyword(s):  
Scoring System ◽  
Head Injuries ◽  
Maxillofacial Injury ◽  
Intracranial Injury ◽  
Cross Sectional ◽  
Craniofacial Trauma ◽  
Maxillofacial Abnormalities ◽  
Cross Sectional Design ◽  
Full Face ◽  
Open Face

Abstract: Helmet can reduce head trauma as well as maxillofacial trauma due to motorcycle accident. This study was aimed to prove the effect of helmet and its type in reducing craniofacial injury. Any intracranial abnormalities were evaluated with the CT Marshall scoring system and maxillofacial abnormalities were evaluated with FISS. This was an analytical comparative study with a cross sectional design. The results showed that there were 72 patients with craniofacial trauma; 59 patients with intracranial abnormalities and 24 patients with maxillofacial abnormalities. There were 43.1% patients that wore helmet; 31.9% of them wore open-face helmet. Data were analyzed by using the unpaired t-tests. Based on FISS, the effect of helmet on maxillofacial injury obtained a t-value of 0.787 (P = 0.217) which indicated that there was no difference in FISS scores between patients wearing helmet and not. Based on the CT Marshall scoring system, the effect of helmet on the intracranial injury obtained a t-value of 1.822 (P = 0.036) which indicated that there was a difference in scores between patients wearing helmet and not. This meant that wearing helmets had some influence on the occurence of head injuries. Based on FISS, the impacts of full-face helmet and open-face helmet on maxillofacial injuries obtained a t-value of 1.890 (P = 0.034) which indicated that there was a difference in FISS between the two types of helmets. Based on the CT Marshall scoring system, the impacts of full-face helmet and open-face helmet on intracranial injuries obtained a t-value of 1.714 (P = 0.049) which indicated that there was a difference in CT Marshall scores between the two types of helmets. Conclusion: Helmet and its type, full-face and open-face, had some influence on the occurence of either maxillofacial or intracranial injuries.Keywords: craniofacial injury, motorcycle, helmetAbstrak: Penggunaan helm dapat mengurangi kejadian trauma kepala dan trauma maksiofasial akibat kecelakaan sepeda motor. Penelitian ini bertujuan untuk membuktikan bahwa pemakaian helm dan tipe helm berperan dalam menurunkan cedera kraniofasial. Abnormalitas intrakranial dievaluasi dengan skoring CT Marshall dan abnormalitas maksilofasial dievaluasi dengan FISS. Jenis penelitian ialah analitik komparatif dengan desain potong lintang. Hasil penelitian mendapatkan 72 pasien dengan trauma kraniofasial; 59 pasien dengan abnormalitas intrakranial dan 24 pasien dengan abnormalitas maksilofasial. Terdapat 43,1% pasien yang menggunakan helm; 31,9% menggunakan helm open-face. Data dianalisis menggyunakan uji t tidak berpasangan. Berdasarkan FISS, efek helm terhadap cedera maksilofasial mendapatkan t = 0,787 (P = 0,217) yag menunjukkan tidak terdapat perbedaan skor antara pasien yang menggunakan dan tidak menggunakan helm. Berdasarkan skoring CT Marshall, efek helm terhadap cedera intrakranial mendapatkan t = 1,822 (P = 0,036) yang menunjukkan terdapat perbedaan skor antara pasien yang menggunakan dan tidak menggunakan helm. Hal ini memperlihatkan bahwa penggunaan helm berpengaruh terhadap kejadian cedera kepala. Berdasarkan FISS, dampak jenis helm full-face dan open-face terhadap cedera maksilofasial mendapatkan t = 1,890 (P = 0,034) yang menyatakan terdapat perbedaan skor FISS antara pengggunaan kedua jenis helm. Berdasarkan skoring CT Marshall, dampak helm full-face dan open-face terhadap cedera intrakranial mendapatkan t = 1,714 (P = 0,049) yang menunjukkan terdapat perbedaan skor CT Marshall antara penggunaan kedua jenis helm. Simpulan: Penggunaan helm dan jenis helm (full-face dan open-face) memengaruhi terjadinya cedera maksilofasial dan intrakranial.Kata kunci: cedera kraniofasial, sepeda motor, helm

scholarly journals Transparency: Transitioning From Human–Machine Systems to Human-Swarm Systems

2019 ◽  
Vol 13 (3) ◽  
pp. 171-195 ◽  
Author(s):  
Karina A. Roundtree ◽  
Michael A. Goodrich ◽  
Julie A. Adams
Keyword(s):  
Real World ◽  
Emergent Behavior ◽  
Robotic Systems ◽  
System Research ◽  
Machine System ◽  
Varying Environments ◽  
Machine Systems ◽  
The Relationship

Swarm robotic systems are gaining in interest with the prospect of their use for various applications, including monitoring, tracking, infrastructure support, and protection. Prior human-swarm system research investigated transparency for these systems, but assumed perfect communication scenarios. Real-world human-swarm systems will not have perfect communication due to human processing limitations caused by a large number of individual entities, emergent behavior due to varying environments, and bandwidth issues. Factors that affect transparency or are influenced by transparency were identified from various human–machine system domains; however, understanding the relationship between factors can help designers identify what criteria can be implemented to achieve transparency for swarms. Challenges that may arise based on transparency criteria from human–machine systems are examined to identify improvements for spatial swarm systems.

scholarly journals Prognosis of lithological variability of the waterblocking strata based on the results of complex interpretation of seismic and electrical data

2018 ◽  
Vol 56 ◽  
pp. 02002
Author(s):  
Igor Sanfirov ◽  
Yuri Stepanov ◽  
Tatiana Baybakova ◽  
Alexander Taynitskiy
Keyword(s):  
Magnesium Salt ◽  
Salt Deposit ◽  
Mining Operations ◽  
Electrical Studies ◽  
Magnesium Salts ◽  
Salt Deposits ◽  
Electrical Data

This article deals with a comprehensive geophysical approach intended to ensure safety of mining operations at the Verkhnekamskoe field of potassium and magnesium salts. As an example, the article presents the results of additional detailed seismic and electrical studies performed on one of the mine fields of the Upper Kama potash-magnesium salt deposit (UKPMSD) within the site designed for mining operations. Based on the obtained results the structure in the form of a “dome” was identified. According to the data of the complex interpretation, the area of an indefinite lithology (most likely, associated with the replacement of salt deposits) was identified in the upstructure part.

SIMILARITIES AND DIFFERENCES OF COMPLEX PARAMETRIC GAME TREES FOR INVESTIGATIONS OF DYNAMIC PROPERTIES OF MACHINE SYSTEMS

2012 ◽  
Vol 165 (3) ◽  
pp. 314-325
Author(s):  
Adam DEPTUŁA ◽  
Marian PARTYKA
Keyword(s):  
Dynamic Properties ◽  
Operational Parameters ◽  
Game Tree ◽  
Tree Structures ◽  
Machine System ◽  
Game Trees ◽  
Dependence Graphs ◽  
Analysis And Synthesis ◽  
Similarities And Differences ◽  
Machine Systems

The paper concerns the application of dependence graphs and game tree-structures for the analysis and synthesis of the dynamic properties of machine systems. Graph distributions starting from various beginning vertices are presented in this paper. In order to illustrate the acceptable subsystems of parent machine system, similarities and differences between complex parametric trees are also given. It is also possible to find the part common to all the game tree-structures and describe it over separate design or operational parameters.

Stability of development drifts in difficult geological conditions of Starobin deposit

2020 ◽  
pp. 26-32
Author(s):  
B. I. Petrovsky ◽  
◽  
V. A. Misnikov ◽  
K. A. Erokhin ◽  
A. B. Petrovsky ◽  
...  
Keyword(s):  
Potassium Salt ◽  
Deep Level ◽  
Maximum Efficiency ◽  
Salt Deposit ◽  
Support Design ◽  
Underground Openings ◽  
Geological Conditions ◽  
Stability Of Development ◽  
Yielding Support ◽  
Roof Rocks

Extraction of the remaining reserves at the Starobinsk potassium salt deposit is associated with degradation of geological conditions as the content of clay beds in roof rocks increases with depth. The article presents the underground test data on the most promising techniques of roof support in development entries in deep-level unstable rocks in the Starobinsk potassium salt deposit. In an operating mine, various combinations of different support types and ground control approaches were tested, namely, compensation voids (slotting, racking) and long roof bolting. It is found that the maximum efficiency of development heading support is achieved with the combination of destressing headings and compensation slots. These flow charts are applicable to a depth of 860–900 m at the clay bed content of 35%. At the depths greater than 900 m and at the clay bed content higher than 35%, each underground excavation should have a specific support type. In extremely complex conditions at any depth and at the clay bed content from 35 to 60% in the roof, the support design for long underground openings with a span to 3.8 m, without slots in the sidewalls can involve roof scaling up to the roof arch (pressure arch) and installation of special-shape and expansion-type yielding support in sidewalls.

scholarly journals POLYSHIFT Communications Software for the Connection Machine System CM-200

1994 ◽  
Vol 3 (1) ◽  
pp. 83-99 ◽  
Author(s):  
William George ◽  
Ralph G. Brickner ◽  
S. Lennart Johnsson
Keyword(s):  
Molecular Dynamics ◽  
Finite Difference ◽  
Quantum Chromodynamics ◽  
Software Library ◽  
Scientific Software ◽  
Local Data ◽  
Machine System ◽  
Lattice Gauge ◽  
Connection Machine ◽  
Machine Systems

We describe the use and implementation of a polyshift function PSHIFT for circular shifts and end-offs shifts. Polyshift is useful in many scientific codes using regular grids, such as finite difference codes in several dimensions, and multigrid codes, molecular dynamics computations, and in lattice gauge physics computations, such as quantum chromodynamics (QCD) calculations. Our implementation of the PSHIFT function on the Connection Machine systems CM-2 and CM-200 offers a speedup of up to a factor of 3–4 compared with CSHIFT when the local data motion within a node is small. The PSHIFT routine is included in the Connection Machine Scientific Software Library (CMSSL).

What Should Simulations Simulate?

1983 ◽  
Vol 27 (12) ◽  
pp. 1006-1006
Author(s):  
R. A. Miller
Keyword(s):  
Computer Simulations ◽  
Systems Analysis ◽  
System Performance ◽  
Analysis And Design ◽  
Machine System ◽  
Systems Analysis And Design ◽  
Machine Systems

Both man-in-the-loop and computer simulations have become relatively mature technologies and are used quite extensively in human-machine systems analysis and design. As simulation becomes more mature and its application more routinized, the fundamental assumptions, both substantive and methodological, upon which simulations rest are sometimes neglected or forgotten. As a consequence some applications of simulation may be less than optimum and there may be some uncertainty surrounding the role which simulation can and should play in the human-machine systems domain. In this paper several types of simulations are classified according to the characteristics of the modelling performed and the representations used. These classes are briefly analyzed to establish some of the ontological and epistemological assumptions required in each class. The assumptions are then compared against the reasons and objectives usually cited for using simulation in human-machine systems work. This comparison provides useful insights into the role of simulation and enables some suggestions for needed work on modelling and theories of human-machine system performance.

Sign in / Sign up

Export Citation Format

Share Document