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coal mining accuracy

  • Accurate characterization of coal pore and fissure ...

    2021-12-1 · 1. Introduction. As a porous medium, coal has an intricate structure of pores and fissures. Since interconnected pores and fissures affect the storage and migration of fluids in coal mass (Cai et al., 2020; Xu et al., 2020), the accurate characterization of the pore and fissure structure of coal is of great significance for the prevention and control of coal mine gas …

  • Improving safety and productivity in coal mines

    The improved accuracy of longwall mining operations reduces the amount of waste rock mined along with the coal, leading to less environmental disruption from rock spoil stockpiles and lower rehabilitation costs. Download Printable version: coal …

  • Prediction and Evaluation of Coal Mine Coal Bump Based …

    2021-10-20 · Prediction is the core of coal bump prevention and control. Accurate and reliable prediction of high-intensity coal bump disaster is to effectively avoid and control it [2]. The predic-tionofcoalbumphas becomearesearch hotspotin thefields of large-scale underground geotechnical engineering and deep coal mineral resources mining.

  • Positioning Accuracy of the Shearer Based on a …

    Positioning Accuracy of the Shearer Based on a Strapdown Inertial Navigation System in Underground Coal Mining Gang Wu, Xinqiu Fang *, Lei Zhang, Minfu Liang, Jiakun Lv …

  • Positioning Accuracy of the Shearer Based on a …

    Currently, mechanization of coal mining equipment has been realized in most coal mines in China, but the automation and intelligence level of coal mining needs to be improved [7,8]. To

  • China pledges to reduce fossil fuel reliance while ...

    2021-12-1 · China pledges to reduce fossil fuel reliance while increasing coal use Demand for coal is skyrocketing in China, which is driving new mining, coal stockpiling and …

  • Relation extraction for coal mine safety information using ...

    2021-3-16 · The data of coal mine safety field are massive, multi-source and heterogeneous. It is of practical importance to extract information from big data to achieve disaster precaution and emergency response. Existing approaches need to build more features and rely heavily on the linguistic knowledge of researchers, leading to inefficiency, poor portability, and slow update …

  • Report

    2021-9-20 · The Kenya Coal Report, 2021 include that coal mining would lead to large-scale evictions and impacts, particularly for women with informal land tenure rights, as well as a range of environmental concerns9. Coal mining would likely displace more than 100,000 residents of Kitui by forcing them to leave their ancestral land10. For farmers, land in ...

  • The 100-year capitalist experiment that keeps Appalachia ...

    2017-12-30 · There were other ironies to savor too. Mullins was a fifth-generation coal miner. But growing up in the 1990s, his father and uncles—all of …

  • Measuring the Gas Content of Coal: A Review

    2012-8-30 · underground coal mining. 2. Gas content component parts Gas is stored in coalbeds in a manner different from conventional reservoirs. Yee et ... (1973). A more accurate method developed by the USBM to measure the low volumes of gas desorbed from samples of oil shale (Schatzel et al., 1987), is based on measuring ...

  • Mining Guide

    2019-6-19 · Mining in Indonesia Investment and Taxation Guide 7 Term Definition PTBA PT Bukit Asam Tbk. (State-Owned Coal Mining Company) PwC PwC refers to the network of member firms of PricewaterhouseCoopers International Limited, and/or one of its member firms, each of which is a separate legal entity RKAB Rencana Kerja dan Anggaran Biaya (Work Plan and ...

  • Mining | Cipta Kridatama

    We know as Indonesia''s leading coal mining contractors, we need to give an ''end-to-end'' service. Survey and Exploration . We always do survey and exploration with high accuracy to start our project. Modelling and Mine Design. We assure to design and modeling our mining site based on the landscape topography and geology.

  • Coal Mines in Illinois

    2021-3-9 · and location of coal mining in Illinois, the Illinois State Geological Survey (ISGS) has compiled maps and directories of known coal mines. The ISGS offers maps at a scale of 1:100,000 and accompanying directories for each county in which coal mining is known to have occurred. Maps at a scale of 1:24,000

  • AshScan – DUO Coal Mining | RTI

    Assessment of air pollution around coal mining area ...

  • Research on Prediction Accuracy of Coal Mine Gas …

    2021-6-7 · In order to achieve the accuracy of gas emission prediction for different workplaces in coal mines, three coal mining workings and four intake and return air roadway of working face in Nantun coal mine were selected for the study. A prediction model of gas emission volume based on the grey prediction model GM (1,1) was established. By comparing the predicted and actual …

  • Ikwezi Coal Mining Project in Dannhauser, Newcastle, …

    2020-8-10 · The mine''s reserves are estimated at 14 million tons of coal across over 12,000 hectares of land, of which 1.25 million tons were expected to be mined yearly [9, 11]. See more "Ikwezi Mining is a visionary mining company operating …

  • 4 Coal Mining and Processing | Coal: Research and ...

    2  · Although the United States has the vast coal resource described in the previous chapter, perhaps as much as 4 trillion tons, the key issue for policy makers is the amount of coal that is economically recoverable.This is not a fixed …

  • Mining in Indonesia

    2017-5-31 · It is now more than eight years since the 2009 Law on Mineral and Coal Mining No. 4 of 2009 (the "Mining Law") was promulgated. While various implementing regulations, including a number of amendments, have been issued by the Government in pursuing the goals of the Mining Law, there remain many challenges for investors, particularly in the

  • Assessment of air pollution around coal mining area ...

    2014-1-1 · Combustion of coal is a major source for fine and ultrafine particles and the active mine fires present in JCF play a major role in generation of PM 2.5 and PM 1.0 at all the four monitoring sites around the coal mining area. Lowest concentration of particulates at CIMFR is due to the fact that the site is far away from the mining areas.

  • Environmental and other effects of mining and transport

    2019-12-11 · IEA Clean Coal Centre – Environmental and other effects of coal mining and transport 9 1 Introduction Coal mining is an industry which has employed millions of people worldwide over centuries and has played a significant role in poverty alleviation, industrialisation and economic growth. However, during this time

  • Carbon emission assessment and control measures for …

    2020-9-26 · Coal is the most important primary energy in China. Although the proportion of coal in China''s total energy consumption continues to decline it will still be the main energy in China for a long time in the future. As the largest contributor to China''s greenhouse gas emissions, the energy conservation and emission reduction of coal industry will be the most critical step for …

  • An Accurate Calculation Model of Carbon Emissions in …

    2016-12-2 · Coal mining Coal washing transportation LIBAO YIN et al: AN ACCURATE CALCULATION MODEL OF CARBON EMISSIONS IN COAL FIRED ... DOI 10.5013/ IJSSST.a.17.44.24 24.3 ISSN: 1473-804x online, 1473-8031 print

  • Experimental Study on Measurement Accuracy of …

    Coal and gas outbursts are a kind of dynamic phenomena seriously threatening subsurface mining safety in coal mines. A precise prediction of outburst hazard in rock crosscut coal uncovering directly depends on whether or not its prediction index can be accurately determined. Measurement uncertainty reflects the degree of uncertainty of a measured result.

  • Accuracy of land use change detection using support …

    2016-7-27 · One objective of the present study was to evaluate the performance of support vector machine (SVM)-based image classification technique with the maximum likelihood classification (MLC) technique for a rapidly changing landscape of an open-cast mine. The other objective was to assess the change in land use pattern due to coal mining from 2006 to 2016. Assessing the …

  • SOUTH AFRICAN COAL SECTOR REPORT

    2018-5-25 · mining and deep underground mining are the two basic methods of mining used in South Africa. Approximately 51% of South African coal mining is done underground and about 49% is produced by open-cast techniques.

  • Mine Entry Metadata

    2014-10-8 · The Coal Authority has records of over 170,000 mine entries within the UK captured in the National Coal Mining Database from a variety of sources including abandonment plans, geological and Ordnance Survey plans. After 1872, there was a requirement for a coal mine owners to deposit their working plan for the mine with the State when the mine ...

  • Estimating emissions and energy from coal mining …

    2021-11-26 · Coal mining operations often involve the flaring of coal mine waste gas, which releases emissions of carbon dioxide, methane, and nitrous oxide. In this example, a facility flares a coal mine waste gas stream from pre-drainage activities of 1,000,000 cubic meters (at standard pressure and temperature) during the year.

  • Accurate Perception of Rock Strata Movement for ...

    Accurate perception of the key stratum instability can improve the safety of coal mining and also provide a basis for alleviating overlying rock strata destruction and environmental disturbance. To efficiently evaluate the instability of the key stratum and its threat to safe mining and environmental protection, the fracture characteristics and weakening mechanisms were …

  • Aberfan disaster kills 144 people and levels a Welsh ...

    2021-9-9 · Aberfan disaster kills 144 people and levels a Welsh mining village. On the morning of October 21, 1966, a landslide of coal waste crashes into …

  • AshScan – DUO Coal Mining | RTI

    2021-12-17 · E.g. wash plant receiving coal from 2 or 3 different mines with different Fe & Ca content. The analyser can store up to 16 different calibrations for different coal types, but it needs an input to know which coal is being feed at any given time, e.g. Coal from Mine A or B, etc. Accuracy is approx. 0.9 -1%

  • Measuring the Gas Content of Coal: A Review

    2012-8-30 · underground coal mining. 2. Gas content component parts Gas is stored in coalbeds in a manner different from conventional reservoirs. Yee et al. (1993) described the gas in coal as existing primarily in a "condensed, near liquid-like state because of physical sorption", unlike the free gas existing in the pores

  • Coal Mining and Local Environment: A Study in Talcher ...

    Coal mining is a loud, daylong, and nightlong process that includes blasting, drilling, and continuous movement of heavy vehicles. These mining-related activities have resulted in emission of loud noise which has disrupted the lives …

  • Are Australian coal mining companies oversold?

    2021-11-18 · There is a world of difference between a commitment to "phase-out" a commodity, and a proposal to "phase-down" a commodity, which is a reason for taking a fresh look at heavily oversold Australian coal mining companies. While not widely researched because they have become ethically incorrect, some coal stocks are trading at close to ...

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