scholarly journals ABOUT THE ROLE OF TECTONIC DISORDERS IN THE DEVELOPMENT OF INSPECTED SEISMICITY FROM JOINT EXPOSURE TO OPEN AND UNDERGROUND WORKS ON THE PRODUCTION OF COAL

2019 ◽  
Vol 2 (2) ◽  
pp. 27-35
Author(s):  
Aleksey Emanov ◽  
Alexander Emanov ◽  
Alexander Fateev
Keyword(s):  
Seismic Process ◽  
Underground Coal Mining ◽  
Local Zone ◽  
Temporary Network ◽  
Seismic Activation ◽  
Tectonic Disturbances ◽  
Underground Workings ◽  
Mine Workings ◽  
Simultaneous Influence

According to the results of monitoring with a temporary network of seismological stations in the south of Kuzbass in the area of seismic activation of technogenic nature, formed under the simultaneous influence of open and underground coal mining, the spatial structure of activation, its development in time and connection with tectonic disturbances are studied in detail. Seismic activation near underground workings is distinguished by locality in area, a large number of earthquakes with magnitudes Ml ≤ 2. For three closely spaced coal mines, there is a general seismic activation, inside of which, as a local zone, there is the activation of underground workings, characterized by the strongest earthquakes with Ml in the range of 3 ÷ 4. Depths of foci have a two-modal distribution with maxima in the range of 1 ÷ 1,5 km and in the range of 2 ÷ 3 km. Both in the area of mines and in the area of open mine workings, the subsoil is significantly deeper than the mine workings seismically activated. The seismic process in time is not stationary and pulsating.

scholarly journals Organizational Citizenship Behavior on Nurses : The Role of Organizational Climate and Commitment

2021 ◽  
Vol 17 (1) ◽  
pp. 32-41
Author(s):  
Abdhy Aulia Adnans ◽  
Sherry Hadiyani ◽  
Siti Zahreni ◽  
Fahmi Fahmi
Keyword(s):  
Organizational Commitment ◽  
Organizational Climate ◽  
Organizational Citizenship ◽  
Organizational Citizenship Behavior ◽  
Quantitative Research ◽  
Citizenship Behavior ◽  
Quality Health ◽  
Simultaneous Influence ◽  
Quality Health Services

Abstract Hospitals in organizing excellent quality health services require human resources committed to the organization and a positive and conducive organizational climate. This study aims to determine the effect of organizational climate and organizational commitment to organizational citizenship behavior of nurses at USU Hospital. In this study, there are two independent variables: organizational climate and organizational commitment, and one dependent variable: organizational citizenship behavior. This research is quantitative research conducted using samples from the population of nurses at USU Hospital, where a sample of 125 nurses was obtained. The data analysis method used in this study is a statistical analysis with multiple regression analysis methods. Findings. The result of this study indicates a simultaneous influence between organizational climate and organizational commitment to organizational citizenship behavior.

The Evolving Role of Task-Group Leaders, A Field Study

1988 ◽  
Vol 32 (13) ◽  
pp. 760-764
Author(s):  
Robert F. Randolph
Keyword(s):  
Group Performance ◽  
Training Data ◽  
Underground Coal Mining ◽  
Group Leaders ◽  
Underground Coal Mines ◽  
And Performance ◽  
Task Oriented ◽  
The Impact ◽  
And Training

Leaders of task-oriented production groups play an important role in their group's functioning and performance. That role also evolves as groups mature and learn to work together more smoothly. The present study uses a functional analysis of the evolving role of supervisors of underground coal mining crews to evaluate the impact of supervisors' characteristics and behaviors on their crews' efficiency and safety, and makes recommendations for improving supervisory selection and training. Data were gathered from a sample of 138 supervisors at 13 underground coal mines. Detailed structured observations of the supervisors indicated that most of their time was spent attending to hardware and paperwork, while comparatively little time was spent on person to person “leadership”. The findings point out that while group needs changed over time, the supervisors' behaviors typically did not keep pace and probably restricted group performance.

scholarly journals INFLUENCE OF TECTONIC DISTURBANCES OF COAL LAYER ON HIS GAS DYNAMIC STATE

2021 ◽  
Vol 26 (1(38)) ◽  
pp. 192-204
Author(s):  
V. V. Zberovskyi ◽  
P. S. Pashenko ◽  
A. V. Pazynich ◽  
S. V. Stefanko
Keyword(s):  
Coal Seam ◽  
Strength Properties ◽  
Dynamic State ◽  
Gas Dynamic ◽  
Disturbed Zone ◽  
Tectonic Disturbances ◽  
Sudden Release ◽  
High Degree ◽  
Outburst Hazard

Problem Statement and Purpose. At one of the coal mines of the Donetsk basin, there was a sudden release of coal and gas. The peculiarity of this case is that the accident happened in the place of the alleged development of a geological disturbance, but without any visible signs of this. Inspection of the ejection site and adjacent horizons made it possible to conclude that the emergency site is located in the place of the plicative disturbance development. Thus, it is necessary to study in more detail the influence of disturbed zones hidden nature on the gas-dynamic state of the reservoir, as well as to develop and implement methods for determining such zones. Data & Methods. To achieve this goal, a new method was tested, based on the property of structureless substances to form crystal-like units. This phenomenon has been studied for decades; therefore, such new formations have long been given the name quasicrystals. It was noted that the increase in the concentration of such forms is associated with the presence of geological disturbances. Consequently, the increase in quasicrystals in the rock is an indicator of its disturbance due to the influence of tectonic pressure. Thus, in order to test the technique and reveal the hidden geological disturbance of the coal seam, coal samples were taken, microstructural features were studied, and the strength of the coal seam was measured at 56 points. Result. As a result the values of the concentration of quasicrystals, data on the strength of the formation were obtained, a schematic map of the development of the disturbance in this area was built, its contours were determined, the center of the disturbed zone was identified and the role of such disturbances in the outburst hazard of the formation was substantiated. It has been established that geological disturbances, even of plicative nature, have a high degree of fracturing. Such pores and cracks in coal reduce the strength properties and are able to concentrate sufficient volumes of gas for manifestation of GDP.

scholarly journals Analysis of blasting seismic impact on underground mining workings under the conditions of the Magnezitovaya mine

2020 ◽  
Vol 192 ◽  
pp. 01029
Author(s):  
Vyacheslav Kutuev ◽  
Pavel Menshikov ◽  
Sergey Zharikov
Keyword(s):  
Underground Mining ◽  
Seismic Effect ◽  
Industrial Safety ◽  
Seismic Stability ◽  
Dynamic Impact ◽  
Mining Operations ◽  
Slowing Down ◽  
Underground Workings ◽  
Mine Workings ◽  
Seismic Impact

Seismic impact of technological explosions on underground mining workings of the Magnezitovaya mine was assessed. Seismic stability of rocks of the Magnezitovaya mine was determined and safe distances from technological explosions have been calculated by the admissible seismic effect for rocks. URAN and Minimate Plus seismic recorders with three-component seismic receivers were used to establish the dynamic impact on the mine workings. Based on comparison of calculated values and experimental measurements, the recommendations are given for explosive mass limitation at a slowing-down stage at a level of minimum dangerous values for technological explosions in underground mine. It is established that the blasting operations carried out at the Magnezitovaya mine of PAO Magnezit Combine with fan longhole stopping were performed with the seismic impact safety of underground technological explosion and will not lead to the loss of rock mass stability near the underground workings. Relevance of these studies is to ensure industrial safety of underground mining operations.

scholarly journals PERAN PEMBIAYAAN TERHADAP PERKEMBANGAN USAHA DAN PENINGKATAN KESEJAHTERAAN ANGGOTA BAITUL MAAL WAT TAMWIL

2020 ◽  
Vol 7 (3) ◽  
pp. 602
Author(s):  
Zulhazmi Zulhazmi ◽  
Ilmiawan Auwalin
Keyword(s):  
Regression Analysis ◽  
Multiple Regression Analysis ◽  
Multiple Regression ◽  
Business Development ◽  
Number Of Customers ◽  
Simultaneous Influence

This research aims to determine the role of financing carried out by BMT UGT Sidogiri Wonokromo branch partially or simultaneously on the business development and improvement of the welfare of its members. The method used in this study is multiple regression analysis. The population used in this study were all members of the BMT UGT Sidogiri Wonokromo branch. This study used a sample of 35 people who were members of the BMG UGT Sidogiri Wonokromo branch, who met the sample criteria. The results of this study indicate that there is a simultaneous influence of financing on business development and the welfare improvement of its members in the BMT UGT Sidogiri Wonokromo branch. The results showed that partially the variables that had a significant effect on business development and welfare improvement were age, gender, total financing and the number of customers after participating in the financing.Keywords: financing, business development and welfare improvement

Early Pumping Engines in the Attercliffe-Darnall-Orgreave coalfield and the role of John Curr

2021 ◽  
Author(s):  
John Hunter
Keyword(s):  
Eighteenth Century ◽  
Steel Melting ◽  
Underground Workings ◽  
The Town ◽  
Inflowing Water

By the mid-1700s, Attercliffe had a developed into a major industrial centre, specialising in steelmaking, and distinct from the town of Sheffield. It also had its own coalfield, which included the Barnsley Coal, valued for its steel-melting coke. The first ‘engine-drained’ coal pit at Attercliffe opened in 1747, close to the River Don and the Sheffield road. It was succeeded by a sequence of further collieries, each following the crop of the Barnsley Coal progressively eastwards towards Orgreave. Development of underground workings by separate, competing partnerships was uncoordinated, and all the collieries faced a constant struggle with inflowing water, including leakage between properties through failed barriers. Nine Newcomen-type pumping engines were eventually erected in this small coalfield during the remainder of the eighteenth century, two of which were also fitted with flywheels for coal-winding. A further four engines, of presumed Newcomen-type, were also erected for winding only. Four of the pumping engines were designed by John Curr, including the Greenland engine, which is described in detail in his book. He also designed and manufactured one of the winding engines.

scholarly journals Specific Features of Mapping Large Discontinuous Faults by the Method of Electromagnetic Emission

Resources ◽  
2020 ◽  
Vol 9 (11) ◽  
pp. 135
Author(s):  
Emiliia Iakovleva ◽  
Margarita Belova ◽  
Amilcar Soares
Keyword(s):  
Electromagnetic Field ◽  
Rock Mass ◽  
Electromagnetic Emission ◽  
Electromagnetic Pulses ◽  
Tectonic Disturbance ◽  
Murmansk Region ◽  
Tectonic Disturbances ◽  
Active Tectonic ◽  
Mine Workings

In this paper, the authors consider the issue of processing the data of electromagnetic pulses (EMPs) recorded in mine workings and their interpretation. The Sami fault (Russia, the Murmansk region) was chosen as the object of the research. A number of experiments, including measuring the EMP level along the fault and the analysis of the results, were performed by the authors. The paper also presents a previously unconsidered method of transition from geological concepts to electro-technical ones, the aim of which is to identify the dependences of the amplitude of electromagnetic field anomalies on the parameters of active tectonic disturbances. The authors assumed the dependence of the amplitude of anomalies on the geological parameters of the rock mass and the thickness of the tectonic disturbance.

scholarly journals Method for optimizing the protecting pillars parameters in underground coal mining

2020 ◽  
Vol 166 ◽  
pp. 02009
Author(s):  
Volodymyr Bondarenko ◽  
Iryna Kovalevska ◽  
Hennadii Symanovych ◽  
Serhii Poimanov ◽  
Viktor Pochepov
Keyword(s):  
Computational Experiment ◽  
Strain State ◽  
Evidence Base ◽  
Underground Coal Mining ◽  
Roof Bolting ◽  
Factors Analysis ◽  
Geological Situation ◽  
Mine Workings ◽  
Enclosing Rocks ◽  
Loadbearing Capacity

A method for optimizing the protecting pillars parameters during the study of soft enclosing rocks (in Ukraine mines) is represented. The necessity of a differentiated approach has been substantiated when choosing the protecting pillar parameters based on the geomechanical factors analysis influencing the state of massif. Mining and geological situation was analysed. It has been studied a stress-strain state (SSS) along the protecting pillar width with account of the mined-out space on the basis of a computational experiment and is presented in the form of curves of vertical and horizontal stresses distribution, as well as stresses intensity distribution. The recommended engineering decisions have been substantiated and the SSS of fastening and security structures has been analysed. A certain reserve of the fastening structure loadbearing capacity as part of the frame support and the combined roof-bolting system has been revealed. An evidence base has been created for the measures development on conducting and maintaining mine workings in the zone of the stope works influence. The recommendations have been developed on the protecting pillar formation with a width of at least 40 – 45 m to exclude the stope works influence.

scholarly journals The role of surface storage of brackish marshes in the southern area of the Baltic Sea (northern Poland)

2017 ◽  
Vol 48 (6) ◽  
pp. 1682-1696
Author(s):  
Roman Cieśliński ◽  
Joanna Jokiel
Keyword(s):  
Surface Water ◽  
Baltic Sea ◽  
The Baltic Sea ◽  
Winter Storms ◽  
Marsh Area ◽  
Brackish Marshes ◽  
The Baltic ◽  
Simultaneous Influence ◽  
Maximum Retention

Abstract This paper attempts to define the dynamics of the surface storage in water circulation in brackish marshes located in the contact zone of the land and sea. This study estimated the quantity of water stored in the area of the Beka reserve during mapping between December 2011 and December 2013. The study area is characterized by the simultaneous influence of marine and fresh waters. The hydrographic situations observed in the area of the Beka reserve are a momentary picture of the surface storage. The maximum retention periods of surface water on the Beka reserve include nearly 40% of the marsh area. The main source of supply of such large quantities of water is not only the atmospheric supply, but also the seawater inflow, particularly often observed during the autumn–winter storms in the Baltic Sea, as well as other periodic flooding of water from the rivers, canals and ditches located within the reserve. At other times, the area occupied by the surface water is, on average, from ca. 2% to nearly 12%. Only in the summer periods is a decrease in the surface (below 1%) observed due to the strong evapotranspiration in the study area.

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