scholarly journals Preliminary Investigation into Measurement While Drilling as a Means to Characterize the Coalmine Roof

Resources ◽  
2020 ◽  
Vol 9 (2) ◽  
pp. 10 ◽  
Author(s):  
Manoj Khanal ◽  
Johnny Qin ◽  
Baotang Shen ◽  
Bongani Dlamini
Keyword(s):  
Coal Mining ◽  
Large Scale ◽  
Preliminary Investigation ◽  
Mining Industry ◽  
Rock Samples ◽  
Ongoing Work ◽  
Roadway Stability ◽  
Variable Nature ◽  
Measurement While Drilling ◽  
Discontinuous Nature

The variable nature of the coalmine roof poses a challenge to roadway stability during underground coal mining. There have been fatalities and financial losses in the coal mining industry due to roadway failures and roof falls. Generally, the geotechnical and geological data gathered from exploration boreholes, which are drilled at considerable distances from each other, are used to characterize the thickness and quality (including strength) of the coalmine roof. This process provides a limited number of samples that cannot represent the discontinuous nature of the strata in the coalmine roof nor can they form reliable inputs to a digital model of the rock mass component of the digital mine. Gaining confidence in the strata properties of the coalmine roof is necessary for the modelling, design, and maintenance of roadways. The paper describes the progress of the ongoing work to investigate the monitoring while drilling (MWD) concept for characterizing coalmine roofs. Large-scale drilling experiments in synthesized sandwiched rock samples without interfaces were carried out. The drilling response data were analyzed to identify whether the drill data differentiates the various strengths associated with the rock samples. The initial results show that the drilling data can differentiate the synthesized rock samples.

scholarly journals Progressive backfill mining technology with split and two wings

2021 ◽  
Vol 303 ◽  
pp. 01036
Author(s):  
Ma Qihua ◽  
Ma Weixiang ◽  
Gong Jianxiang
Keyword(s):  
Coal Mining ◽  
Coal Mine ◽  
Large Scale ◽  
Mining Industry ◽  
Underground Water ◽  
Mining System ◽  
Mining Technology ◽  
Soil And Water Loss ◽  
Efficient Recovery ◽  
Massive Accumulation

: With the large-scale development of the mining industry, soil and water loss, environmental pollution and other geological disasters ac-companied by coal mining are continually increasing. Therefore, while promoting coal mine production by relying on scientific and technological progress, measures to control and reduce the resulting disasters cannot be ignored. In this paper, taking Xiezhuang coal mine as an example, we have combined its actual production conditions to solve the environmental problems caused by the massive accumulation of surface gangue in Xiezhuang coal mine. Moreover, to improve the efficient recovery of coal resources and ensure the safety of deep resources mining, and to reduce the rock burst and the damage caused to the underground water body, a re-search on forward filling mining technology with split-wing is put forward. This paper mainly discusses the related technologies and laws of forward filling mining method with split-wing, coal mining system, technological process, and filling mining.

scholarly journals State aid and competitiveness of the hard coal mining industry in the European Union

Equilibrium ◽  
2015 ◽  
Vol 10 (1) ◽  
pp. 69
Author(s):  
Izabela Jonek-Kowalska
Keyword(s):  
European Union ◽  
Coal Mining ◽  
Large Scale ◽  
Mining Industry ◽  
State Aid ◽  
Hard Coal ◽  
The European Union ◽  
Coal Mining Industry ◽  
Hard Coal Mining ◽  
The Eu

The hard coal mining industry in the European Union (EU) is in decline, mostly due to a lack of price competitiveness. It is maintained, to a great extent, by state aid; the key objective of the industry’s existence is to provide energy security and guarantee employment in the mining regions. In Poland, the hard coal mining industry is currently undergoing a serious crisis that threatens the two largest mining enterprises with bankruptcy. In addition, due to the European Union’s restrictions concerning the circumstances of granting state aid, these enterprises cannot count on the financial support for the repair restructuring that they used on a large scale until 2011. Therefore, in this article, the main objective is to determine the influence of state aid on the competitiveness of the hard coal mining industry in 12 countries of the EU, including Poland in specific.  In order to achieve the stated objective, the article is divided into three parts. The first part consists of a literature review, and legal regulations that are related to state aid for the hard coal mining industry in the EU are presented. The second part identifies the amount of state aid for the mining industry in the examined countries. Next, the economic effects of state aid for hard coal mining in the European Union are examined. The third assesses the financial results of 24 Polish hard coal mines.

scholarly journals Sustainable Development of Resources and the Environment: Mining-Induced Eco-Geological Environmental Damage and Mitigation Measures—A Case Study in the Henan Coal Mining Area, China

2019 ◽  
Vol 11 (16) ◽  
pp. 4366 ◽  
Author(s):  
Guo ◽  
Guo ◽  
Tan ◽  
Bai ◽  
Zhao
Keyword(s):  
Coal Mining ◽  
Large Scale ◽  
Management Practices ◽  
Mining Industry ◽  
Transitional Zone ◽  
Mining Area ◽  
Atmospheric Environment ◽  
Mitigation Measures ◽  
Environmental Damage ◽  
Geological Environment

Coal is an important resource that has supported China’s economic development. This situation is expected to continue in the immediate future. However, coal mining has also led to serious environmental disasters in some mining areas. Henan Province is one of the 14 large-scale coal bases that are planned by the Chinese state. It is located in the transitional zone between the second and third terrain ladders of China and spans two tectonic units. The geological features and ecological environmental characteristics display wide spatial variations throughout this district, which is an ecologically fragile region of stepped transition type. However, large-scale, extremely intense coal mining activities will inevitably lead to further deterioration of the already fragile ecological and geological (eco-geological) environment, which makes recovery increasingly difficult. Based on the condition of the eco-geological environment and the coal mining industry in the Henan mining area, the mechanisms by which mining-induced damage can occur were analyzed. The characteristics and status of the destruction of ground structures, land resources, water resources, the atmospheric environment, and natural ecology are discussed in this paper. Appropriate mitigation measures are proposed based on the findings. This mainly includes: management practices to prevent and mitigate damage throughout all stages of mining; adoption of mining techniques that will control damage at the source; and, the adoption of appropriate post-mining recovery technologies. The analysis of mining-induced eco-geological environmental damage and mitigation measures is of importance for the prevention of eco-geological disasters, and the promotion of efficient and environmentally sustainable exploitation of coal resources.

Coal mining-disturbed land reclamation laws

2020 ◽  
pp. 15-26
Author(s):  
T. V. Galanina ◽  
M. I. Baumgarten ◽  
T. G. Koroleva
Keyword(s):  
Large Scale ◽  
Land Reclamation ◽  
Mining Industry ◽  
Development Program ◽  
Soil Disturbance ◽  
Open Pit ◽  
Open Pit Mining ◽  
Disturbed Land ◽  
Critical Problems ◽  
Production Output

Large-scale mining disturbs wide areas of land. The development program for the mining industry, with an expected considerable increase in production output, aggravates the problem with even vaster territories exposed to the adverse anthropogenic impact. Recovery of mining-induced ecosystems in the mineral-extracting regions becomes the top priority objective. There are many restoration mechanisms, and they should be used in integration and be highly technologically intensive as the environmental impact is many-sided. This involves pollution of water, generation of much waste and soil disturbance which is the most typical of open pit mining. Scale disturbance of land, withdrawal of farming land, land pollution and littering are critical problems to the solved in the first place. One of the way outs is highquality reclamation. This article reviews the effective rules and regulations on reclamation. The mechanism is proposed for the legal control of disturbed land reclamation on a regional and federal level. Highly technologically intensive recovery of mining-induced landscape will be backed up by the natural environment restoration strategy proposed in the Disturbed Land Reclamation Concept.

Social Licence to Finance and Its Impact on the Coal Mining Industry

2017 ◽  
Author(s):  
Margaret Armstrong ◽  
Alain G. Galli ◽  
Carlos Petter ◽  
Renato Aurelio Petter ◽  
Anna da Silva ◽  
...  
Keyword(s):  
Coal Mining ◽  
Mining Industry ◽  
Coal Mining Industry

scholarly journals Mining Industry Impact on Environmental Sustainability, Economic Growth, Social Interaction, and Public Health: An Application of Semi-Quantitative Mathematical Approach

Processes ◽  
2021 ◽  
Vol 9 (6) ◽  
pp. 972
Author(s):  
Muhammad Mohsin ◽  
Qiang Zhu ◽  
Sobia Naseem ◽  
Muddassar Sarfraz ◽  
Larisa Ivascu
Keyword(s):  
Economic Growth ◽  
Energy Source ◽  
Coal Mining ◽  
Environmental Sustainability ◽  
Mining Industry ◽  
Provincial Government ◽  
Mining Operations ◽  
Human Needs ◽  
The Government ◽  
Operational Activities

The mining industry plays a significant role in economic growth and development. Coal is a viable renewable energy source with 185.175 billion deposits in Thar, which has not been deeply explored. Although coal is an energy source and contributes to economic development, it puts pressure on environmental sustainability. The current study investigates Sindh Engro coal mining’s impact on environmental sustainability and human needs and interest. The Folchi and Phillips Environmental Sustainability Mathematics models are employed to measure environmental sustainability. The research findings demonstrated that Sindh Engro coal mining is potentially unsustainable for the environment. The toxic gases (methane, carbon dioxide, sulfur, etc.) are released during operational activities. The four significant environment spheres (atmosphere, hydrosphere, biosphere, and lithosphere) are negatively influenced by Thar coal mining. The second part of the analysis results shows that human needs and interests have a positive and significant relationship except for human health and safety with Sindh Engro coal mining. Environmental pollution can be controlled by utilizing environmentally friendly coal mining operations and technologies. Plantation and ecological normalization can protect the species, flora, and fauna of the Thar Desert. The government of Pakistan and the provincial government of Sind should strictly check the adaptation of environmental standards. Furthermore, the researchers should explore the environmental issues and solutions so that coal mining becomes a cost-efficient and environmental-friendly energy source in Pakistan.

scholarly journals Providing large-scale disk storage at CERN

2019 ◽  
Vol 214 ◽  
pp. 04033
Author(s):  
Hervé Rousseau ◽  
Belinda Chan Kwok Cheong ◽  
Cristian Contescu ◽  
Xavier Espinal Curull ◽  
Jan Iven ◽  
...  
Keyword(s):  
High Performance ◽  
Large Scale ◽  
Distributed Storage ◽  
Storage System ◽  
Primary Data ◽  
Disk Storage ◽  
The Road ◽  
Ongoing Work ◽  
Software Distribution ◽  
Microsoft Office

The CERN IT Storage group operates multiple distributed storage systems and is responsible for the support of the infrastructure to accommodate all CERN storage requirements, from the physics data generated by LHC and non-LHC experiments to the personnel users' files. EOS is now the key component of the CERN Storage strategy. It allows to operate at high incoming throughput for experiment data-taking while running concurrent complex production work-loads. This high-performance distributed storage provides now more than 250PB of raw disks and it is the key component behind the success of CERNBox, the CERN cloud synchronisation service which allows syncing and sharing files on all major mobile and desktop platforms to provide offline availability to any data stored in the EOS infrastructure. CERNBox recorded an exponential growth in the last couple of year in terms of files and data stored thanks to its increasing popularity inside CERN users community and thanks to its integration with a multitude of other CERN services (Batch, SWAN, Microsoft Office). In parallel CASTOR is being simplified and transitioning from an HSM into an archival system, focusing mainly in the long-term data recording of the primary data from the detectors, preparing the road to the next-generation tape archival system, CTA. The storage services at CERN cover as well the needs of the rest of our community: Ceph as data back-end for the CERN OpenStack infrastructure, NFS services and S3 functionality; AFS for legacy home directory filesystem services and its ongoing phase-out and CVMFS for software distribution. In this paper we will summarise our experience in supporting all our distributed storage system and the ongoing work in evolving our infrastructure, testing very-dense storage building block (nodes with more than 1PB of raw space) for the challenges waiting ahead.

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