scholarly journals Current Status of Coal Mining and Some Highlights in the 2030 Development Plan of Coal Industry in Vietnam

2021 ◽  
Vol 1 (2) ◽  
Author(s):  
Quynh Nga NGUYEN ◽  
Van Hau NGUYEN ◽  
Tu Phuong PHAM ◽  
Thi Khanh Ly CHU
Keyword(s):  
Coal Mining ◽  
Underground Mining ◽  
Coal Industry ◽  
Development Plan ◽  
Open Pit ◽  
Current Status ◽  
Underground Coal Mining ◽  
General Picture ◽  
Industry Development ◽  
Open Cast Mining

Coal mining is one of the key mining industries in Vietnam. Coal is also an important fuel formany other industries. Currently, coal mining is mainly concentrated in Quang Ninh coal basin, theproportion of open-pit coal mining and underground mining is quite similar. However, according toDecision 403/QD-Ttg on approving the adjustment of the Vietnam coal industry development plan up to2020, considering the prospects by 2030, the mining output will be from 51 to 54 million tons by year2025 and from 55 to 57 million tons by 2030. In which, the proportion of underground coal mining willincrease gradually compared with that of open-cast mining, specifically, by 2030, the proportion of thelater compared to that of the former will be only 11%. According to this plan, open-pit coal mines havebeen shifting to underground mining technology, due to the increasingly deep conditions of coal seams.The following article will analyze the current status of coal mining in Vietnam and some highlights of thecoal industry development plan to 2030, in order to provide a general picture of Vietnam’s coal industryin the future.

scholarly journals Justification of stripping and development of a modular mine site for a combined coal mining method in Kuzbass on the example Baikaimskaya mine site

2020 ◽  
Vol 243 ◽  
pp. 293
Author(s):  
Roman Shishkov ◽  
Valerii Fedorin
Keyword(s):  
Coal Mining ◽  
Development Strategy ◽  
Coal Mine ◽  
Underground Mining ◽  
Coal Industry ◽  
Open Pit ◽  
Kuznetsk Coal ◽  
Mine Site ◽  
Geological Conditions ◽  
Mining Work

The article considers one actual method for development coal deposits in the Kuzbass by open-underground mining. The scientific and practical advantages of the proposed method due to the use of common infrastructure of coal mine and a modular mine site (subsequently transformed into a mining and technological structure operating according to the mine – longwall scheme) are presented. Currently, a development strategy for Kuzbass until 2035 has been developed. As part of the strategy, a draft program for subsoil use is being formed in the coal industry department. The program should take into account all the positive and negative aspects associated with coal mining in cities and municipal areas and also their prospects. In the Kuznetsk coal basin, 42 mines and 52 opencast mines are mining, of which 12 enterprises use partially unified infrastructure. According to the results of open-underground mining work conducted by the laboratory of the Institute of Coal and Coal Chemistry of the Siberian Branch of the Russian Academy of Sciences (Institute of Coal SB RAS), the list of sites includes favorable mining and geological conditions with incidence angles of up to 18 degrees. As open-pit coal production increases, many sites encounter such a parameter as maximum allowable (boundary) strip ratio. At the stage of preparing the feasibility study for the development of a coal deposit, this coefficient is calculated first of all, since duration of enterprise’s work and its economic component depend on it. In order to increase parameters, it is necessary to carry out transition from open works to underground. As a result, coal mine will not work at a loss, providing production with an economically disadvantageous strip ratio.

scholarly journals Development Status of Coal Mining in China

2021 ◽  
Author(s):  
liu xinjie ◽  
Li Lianghui ◽  
Yang yingming
Keyword(s):  
Coal Mining ◽  
Underground Mining ◽  
Coal Mines ◽  
Production Capacity ◽  
Coal Industry ◽  
Open Pit ◽  
Open Pit Mining ◽  
Development Status ◽  
Average Production ◽  
Speed Up

Abstract As a controllable active resource in China, coal mining is facing the transition from output to quality. Base d on the total mining production and average capacity, the current situation and level of coal mining at three scales of mine, city and province is analyzed , data support for the layout of sustainable mining development and the optimization of output is provided. The results show that China's coal is mainly mined by underground mining, accounting for 87%, with an average production capacity of 0.93 million tons. Open pit mining accounts for 13%, with an average production capacity of 5.73 million ton s. S o t he average production capacity of open pit and underground workers is 1.045 million tons, with 1,181 coal mines capacity lower than 0.3 million tons, accounting for 35% of the total coal mines, contributing only 4% to their output. They are distributed in about 48 cities in 6 provinces, seriously restricting the green coal mining. The coal industry should speed up the reduction of small coal mines in key provinces and cities, eliminate outdated product ion capacity in the central region, increase the speed and proportion of coal resources moving westward, and promote high quality development of coal mining.

scholarly journals Effect of Underground Coal Mining on Slope Morphology and Soil Erosion

2019 ◽  
Vol 2019 ◽  
pp. 1-12
Author(s):  
Liu Ning ◽  
Zhao Xiao-Guang ◽  
Song Shi-Jie ◽  
Zhou Wen-Fu
Keyword(s):  
Soil Erosion ◽  
Surface Morphology ◽  
Coal Mining ◽  
Underground Mining ◽  
Slope Gradient ◽  
Underground Coal Mining ◽  
Slope Length ◽  
Natural Slope ◽  
Included Angle ◽  
Working Face

Underground coal mining will cause large-scale surrounding rock movement, resulting in surface subsidence and irreversible deformation of surface morphology, which would lead to geological disasters and ecological environment problems. In this paper, FLAC3D numerical model is built based on the natural slope gradient, slope type, and included angle between the slope and working face, and their influences on the change of surface morphology and soil erosion caused by underground coal mining is studied. Research results show that the change of slope gradient caused by underground mining decreases with the increase of natural slope gradient, while slope length has opposite laws; different slope types have different changes of slope morphology. The order of slope types corresponding to gradient changes is mixed slope < uniform slope < concave slope < convex slope; the length of the concave and uniform slope decreases, and the convex and mixed slope length increases. When the included angle between the slope and working face is 0° ≤ α < 90°, the underground mining will cause the natural slope gradient increase, the change of the slope gradient will increase with the rise of the angle, the slope length will decrease, and the rate of decrease will be reduced with the increase of the angle. Coal mining will cause the increasing of the runoff and erosion modulus of slope, mainly runoff modulus.

CURRENT STA TE OF THE RESOURCE BASE OF COAL MINING INDUSTRY IN KUZBASS

2019 ◽  
Vol 4 (1) ◽  
pp. 177-186
Author(s):  
S.V. Shaklein ◽  
◽  
M.V. Pisarenko ◽  
Keyword(s):  
Coal Mining ◽  
Mining Industry ◽  
Coal Industry ◽  
Raw Material ◽  
Open Pit ◽  
Open Pit Mining ◽  
Material Base ◽  
Resource Base ◽  
Production Technologies ◽  
Underground Method

Analysis of the grade composition of the mineral resource base of the distributed and undistributed subsoil Fund as of 01.01.2018 showed a decrease in reserves of coal intended for open pit mining. In the future, the production of a number of technological grades of coal (gas fat (GZh), fat (Zh), coking fat (KZh), coking (K), coking caking low-metamorphized (KCN), coking caking (KC), lean caking (OC), low caking (CC) is possible only by underground method. The expansion of the raw material base of the Kuzbass coal industry and the support of coal production volumes, primarily by the technological of grades coking fat (KZh), coking (K), coking caking (KC), lean caking (OC), low caking (CC) involves exploration, the use of unconventional production technologies and tax preferences for coal mining enterprise

scholarly journals The state of the coal industry of Donbass at the end of the XIX – at the beginningof the XX century

2020 ◽  
pp. 27-31
Author(s):  
І.В. Довжук
Keyword(s):  
Coal Mining ◽  
Underground Mining ◽  
Economic Benefits ◽  
Coal Industry ◽  
Economic Feasibility ◽  
Technical Improvement ◽  
Donetsk Basin ◽  
Xix Century ◽  
Coal Enterprises ◽  
Implementation Of Innovations

The article deals with the development of coal industry of the Donetsk basin and technical support of mineral fuel production in the mines of the region in the late XIX - early XX centuries. The last decade of the XIX century. characterized by the concentration of coal enterprises, which led to the widespread implementation of steam lifting, drainage and ventilation devices, the use of dynamite instead of gunpowder in the conduct of underground mining; construction of better equipped and capital super-mine technological complexes. It is noted that the coal mining enterprises of Donbass in 1914, although technically lagging behind the leading capitalist countries, were relatively modernized and showed positive tendencies to their further improvement.One of the major drawbacks of the beginning of the development of the Donbass coal industry was the lack of advanced machinery.  By the middle of 1914 at least 12 types of felling machines were already actively used in the mines of the Donetsk basin, moreover, the supply of disk and rod machines was carried out by British factories, chain - American, shock - British, American, and German. Cutting machines belonged to the heavy type and cost several times more than percussion. Cutting machines were driven by pneumatic or electropneumatic engines. It was emphasized that miners in search of maximum optimization and productivity of coal mining were increasingly concerned about the technical improvement of their enterprises, as the introduction of appropriate innovations could significantly affect the economic feasibility and profitability of enterprises. This was required by the technological necessity in connection with the expansion of production and the constant shortage of labor. Foreign owners and shareholders who tried to introduce advanced technologies of their countries played an important role in the implementation of innovations. In addition, technical improvements in mining processes not only brought economic benefits to their owners, but sometimes indirectly improved working conditions and safety at mining facilities.

scholarly journals Combined Method of Coal Mining in the Opening of Shallow Layers as a Direction of Innovative Development of Geotechnology

2021 ◽  
Vol 315 ◽  
pp. 01006
Author(s):  
Tatiana Tyuleneva ◽  
Roman Shishkov ◽  
Elena Kucherova ◽  
Marat Moldazhanov
Keyword(s):  
Coal Mining ◽  
Underground Mining ◽  
Methodological Approach ◽  
Production Capacity ◽  
Open Pit ◽  
Open Pit Mining ◽  
Mining Operations ◽  
Balanced Development ◽  
Coal Reserves ◽  
The Cost

In recent years, there has been a decline in the efficiency of coal mining by traditional methods. On the one hand, the volume of coal outside the contour of the cut, which is economically impractical for open-pit mining, is increasing. On the other hand, when using underground geotechnology, the cost of production exceeds the cost of performing mining operations using open geotechnology, this is due to differences in the factors of operation of the open pit and the mine. This circumstance determines the use of open-underground technology for mining coal reserves outside the contour of the open pit as an actual and promising direction. This article describes a methodological approach based on the use of technological schemes for the preparation and treatment of reserves of powerful shallow coal seams, the justification of the parameters of combined geotechnology with a coordinated and balanced development of open and open-underground mining operations with the distribution of reserves for open and open-underground mining of coal reserves beyond the limit contour of the open pit, the preparation of excavation sites directly from its workings and the coordination of production capacity and the speed of their development. Its application will increase the production capacity of the coal mining complex without additional environmental burden and will provide an increased return on investment.

scholarly journals The Role of Coal-Mining Museum in Kuzbass Coal Industry Development

2019 ◽  
Vol 105 ◽  
pp. 04044
Author(s):  
Dmitry Kuznetsov ◽  
Anna Novoklinova ◽  
Nadezda Rabkina ◽  
Olga Valko
Keyword(s):  
Urban Environment ◽  
Coal Mining ◽  
Conceptual Understanding ◽  
Coal Industry ◽  
Local Culture ◽  
Industry Development ◽  
Culture Environment ◽  
Local Traditions ◽  
Cluster 2

A museum cluster is a phenomenon that did not acquire conceptual understanding until the late 1990s. Since then, numerous approaches to defining a museum cluster have been put to the test. It has been unanimously stated that a museum cluster is an environment-creating and culture-forming entity, which catches the spirit of the time/place and embodies the locus genii. The museum, thus, renews and strengthens itself in the urban, scientific and cultural thought. These apply well to Krasnaya Gorka, a museum cluster in Kemerovskaya oblast. Combining all ‘cluster’ characteristics, Krasnaya Gorka features very specific, historically and culturally valuable trends eventually transforming the urban environment and forming local traditions. The study is aimed at comprehensive research of a museum cluster contribution to the local culture, environment, science, economy and, most importantly, people. The study showed that: (1) the Krasnaya Gorka museum is justifiably the heart of a cluster; (2) the archival materials in city museums are valuable as integral historic documents in their own right, but more significant when regarded along with other papers and artefacts in the domain of the museums, forming the cluster; c) the Krasnaya Gorka museum is a culture-forming entity due to its aggregating people and organizing activities.

EXPERIENCE OF FOREIGN COUNTRIES IN APPLYING INNOVATIONS IN THE COAL INDUSTRY

2020 ◽  
Vol 13 (1) ◽  
pp. 170-175
Author(s):  
M.V. Chernyaev ◽  
◽  
E.N. Ageev ◽  
Keyword(s):  
Coal Mining ◽  
Coal Industry ◽  
Underground Coal Mining ◽  
Innovative Technologies ◽  
Foreign Countries

The article examines the trends in the development of innovative technologies in open and underground coal mining, digitalization of processes in the exploration and geodetic works of the coal industry, and features of their application

Assessment of Environmental and Occupational Safety in Mining Industry during Underground Coal Mining

2020 ◽  
Vol 11 (3) ◽  
Author(s):  
Marat L. RUDAKOV ◽  
Konstantin A. KOLVAKH ◽  
Iana V. DERKACH
Keyword(s):  
Coal Mining ◽  
Computer Modelling ◽  
Geophysical Methods ◽  
Coal Industry ◽  
Effective Control ◽  
Complex Method ◽  
General Tendency ◽  
Underground Coal Mining ◽  
Rock Falls ◽  
Continuous Increase

Ensuring the ever-increasing demands of society for energy resources is a key problem for the development of the economy of all countries of the world. At this stage, to improve the living and working conditions of a person, the development of industry and transport, the growth of production based on scientific and technological progress, a continuous increase in energy use is required. Analysis of the environmental consequences of coal mining shows that the human impact on the environment in the process of economic activity becomes global. Therefore, the main goal of the work is to assess the environmental safety in production because of a decrease in rock mass during underground coal mining. The work analyses the levels of negative environmental impact of coal industry enterprises. The relationship between the key statistical indicator that affects the accident rate and the value of professional risk is demonstrated. It is shown that despite the general tendency to reduce the number of cases of fatal injuries to coal mine workers, the procedure for assessing the risk caused by rock falls needs to be improved. In this regard, when assessing occupational risk, it becomes relevant to use information from multifunctional systems of safety (MSS). The complex method of effective control of mountain pressure is illustrated by application of the developed methodology of computer modelling of geo-mechanical processes, instrumental and geophysical methods for protection and maintenance of mine workings at development of a coal seam of the Barentsburg field.

scholarly journals Numerical modeling of open pit (OP) to underground (UG) transition in coal mining

2016 ◽  
Vol 38 (3) ◽  
pp. 35-48 ◽  
Author(s):  
Phu Minh Vuong Nguyen ◽  
Zbigniew Niedbalski
Keyword(s):  
Numerical Modeling ◽  
Coal Mining ◽  
Surface Deformation ◽  
Underground Mining ◽  
Primary Objective ◽  
Open Pit ◽  
Open Pit Mining ◽  
Original Experiment ◽  
Surface Stability ◽  
The Impact

Abstract The primary objective of the present paper is an attempt at evaluating the influence of sub-level caving operations on the slope stability of a still-functioning open pit coal mine in Vietnam. Initially, various methods of predicting the impact of underground mining on surface stability are discussed. Those theoretical considerations were later utilized in the process of constructing a Flac-2D-software-based numerical model for calculating the influence of underground operation on the deformation and possible loss of stability of an open pit slope. The numerical analysis proved that the values of open pit slope displacements were affected mainly by underground exploitation depth, direction of operation (i.e., from one slope to the other) and the distance from the slope plane. Real geomechanical strata parameters from the Vietnamese coal basin of Cam Pha were used in the modeling process. The paper is, therefore, a critical review of the hitherto proposed methods of predicting the impact of underground operation (UG) on open pit mining (OP), illustrated with selected examples of case studies on OP-UG interaction, followed by an original experiment based on numerical modeling method. This is first such study for the genuine conditions of the coal mining in Vietnam. The obtained results, however, should not be generalized due to a highly specific character of the analyzed phenomenon of mining-induced surface deformation. The practical implications of the study may occur extremely useful in the case of an UG-OP transition. Such a transition is often necessary for both technical and economical reasons, as in some coal basins open pit operations at greater depths occur unfeasible, which calls for a proper selection of parameters for a planned underground operation.

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