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 The coal industry should speed up the reduction of small coal mines in key provinces and cities, eliminate outdated product ion capacity in the central region, increase the speed and proportion of coal resources moving westward, and promote high quality development of coal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 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.

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 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.

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 Factor Model of Labor Productivity in the Coal Industry

2021 ◽  
Vol 2020 (4) ◽  
pp. 557-567
Author(s):  
Evgeny Kharlampenkov ◽  
Irina Kudryashova
Keyword(s):  
Information Technologies ◽  
System Analysis ◽  
Underground Mining ◽  
Multiplicative Model ◽  
Coal Industry ◽  
Open Pit ◽  
Practical Significance ◽  
Open Pit Mining ◽  
Labor Costs ◽  
Labor Efficiency

The article introduces the problem of increasing the labor efficiency at Russian coal enterprises. Using the case of Kuzbass, the authors examined factors that affect labor efficiency in coal industry, e.g. new equipment and mining technologies, qualified personnel, robotics, new quality management and information technologies, etc. They used a multiplicative model to estimate the key factors and made forecast of its dynamics up to 2035 for open and underground mining. The authors believe that effective models of mining enterprise management are impossible without a radical increase in labor efficiency, since it indicates labor costs in the production of the final product per unit of time. Labor efficiency in the open-pit mining is higher, as it has lower labor costs and offers a simple and safe way of organizing labor processes. However, new equipment can increase the efficiency of underground mining. Underground mines also demonstrate a faster growth of labor efficiency than open pits. The authors justified the need to assess labor efficiency using a system analysis and a multiplicative model. As global coal market continues to deteriorate, mining labor efficiency can still maintain positive long-term rates of growth if it manages to optimize deliveries and increase the labor efficiency at the federal level. The research possesses considerable theoretical and practical significance as it offers a solution for of the most relevant challenges.

CURRENT STATE OF THE RESOURCE BASE OF COAL MINING INDUSTRY IN KUZBASS

2020 ◽  
Vol 2 (1) ◽  
pp. 191-201
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 ◽  
Current State ◽  
Production Technologies

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 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 Managing and Reforesting Degraded Post-Mining Landscape in Indonesia: A Review

Land ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 658
Author(s):  
Pratiwi ◽  
Budi H. Narendra ◽  
Chairil A. Siregar ◽  
Maman Turjaman ◽  
Asep Hidayat ◽  
...  
Keyword(s):  
Acid Mine Drainage ◽  
Success Rate ◽  
Coal Mining ◽  
Best Management Practices ◽  
Mine Drainage ◽  
Forest Area ◽  
Tree Planting ◽  
Open Pit ◽  
Open Pit Mining ◽  
Acid Mine

Tropical forests are among the most diverse ecosystems in the world, completed by huge biodiversity. An expansion in natural resource extraction through open-pit mining activities leads to increasing land and tropical forest degradation. Proper science-based practices are needed as an effort to reclaim their function. This paper summarizes the existing practice of coal mining, covering the regulatory aspects and their reclamation obligations, the practices of coal mining from various sites with different land characteristics, and the reclamation efforts of the post-mining landscapes in Indonesia. The regulations issued accommodate the difference between mining land inside the forest area and outside the forest area, especially in the aspect of the permit authority and in evaluating the success rate of reclamation. In coal-mining practices, this paper describes starting from land clearing activities and followed by storing soil layers and overburden materials. In this step, proper handling of potentially acid-forming materials is crucial to prevent acid mine drainage. At the reclamation stage, this paper sequentially presents research results and the field applications in rearranging the overburden and soil materials, controlling acid mine drainage and erosion, and managing the drainage system, settling ponds, and pit lakes. Many efforts to reclaim post-coal-mining lands and their success rate have been reported and highlighted. Several success stories describe that post-coal-mining lands can be returned to forests that provide ecosystem services and goods. A set of science-based best management practices for post-coal-mine reforestation is needed to develop to promote the success of forest reclamation and restoration in post-coal-mining lands through the planting of high-value hardwood trees, increasing trees’ survival rates and growth, and accelerating the establishment of forest habitat through the application of proper tree planting technique. The monitoring and evaluation aspect is also crucial, as corrective action may be taken considering the different success rates for different site characteristics.

Analysis of Slope Stability for West Project of Side Slope in XiaoLongtan Opencast

2011 ◽  
Vol 90-93 ◽  
pp. 728-733
Author(s):  
Zhi Fei Song ◽  
Xiao Ting Wang ◽  
Hong Yan Peng ◽  
Hong Ying Zhao
Keyword(s):  
Slope Stability ◽  
Limit Equilibrium ◽  
Production Capacity ◽  
Open Pit ◽  
Open Pit Mining ◽  
Opencast Mining ◽  
Low Loss ◽  
Side Slope ◽  
Mining Safety ◽  
Stability Results

There have some advantages like as Good working conditions, High Security, Guaranteed production capacity and Low loss for Open pit mining, therefore the degree of opencast mining increasing. In this paper numerical simulation and limit equilibrium are used for Stability of west project of side slope which are under the conditions of Normal and Saturation. Draw slope stability results under the two conditions in order to take appropriate measures to provide appropriate post- mining safety protection.

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