• Methods for determination of coal carbon in reclaimed

    2014-2-1 · Surface mining, also known as opencast mining, is the method of choice when (a) the coal seam is relatively shallow (40 to 50 m), (b) the overburden consists of unconsolidated material, or (c) the geomorphology allows easy removal of the earth and rock strata (overburden) (Hansen, 1990).A Method for Determining Feasibility of Mining Residual,2020-8-27 · Out-fashioned goaf is the protective structure for mining the upper residual coal, and its stability is the core problem in mining the upper residual coal. According to the upward mining demand for No. 5 coal seam above the out-fashioned goaf in Baizi Coal Mine, a new method is proposed to determine the upward mining safety. According to the analysis of the actual

  • A rapid and accurate direct measurement method of

    2020-11-1 · 1. Introduction. Coal mine gas disaster is always the most dangerous in the process of coal mining .The determination of coal seam gas content is one of the fundamental key works involving the regional prediction of coal and gas outburst, validity check of outburst prevention, prediction of coal mine gas emission and designing gas drainage systems,.(PDF) A dynamic method to determine the supports ,The determination of the correct design support capacity of shield supports is the key to the safe control of strata within the vicinity of longwall coal panels. There are a number of design

  • Mining method selection and transition depth

    2021-5-5 · aimed at more specific mining methods. Bandophadhyay and Venkatasubramanian (1987) developed on of the first e studies on the implementation of expert system in the mining method selection process. It is developed to aid the mining engineers in selecting suitable mining methods for coal deposits minable by underground methods.(PDF) Estimation of Gas Loss in Methodology for,2021-2-13 · The determination of natural gas content in coal seams is essential to safe mining activities and to estimate gas resources. It is used to estimate methane emissions into

  • An indicative method for determination of the most

    2012-2-29 · Considering growing population and decreasing mineral resource reserves, the issue of undermining has been and shall remain very topical. This study aims to identify the mutual connections between mined out panels of a deposit and the final manifestations on the ground surface related to deep black coal mining. On the grounds of the identified connections, the Determination of desorbable gas concentration of coal,1970-1-1 · Printed in Great Britain DETERMINATION OF DESORBABLE GAS CONCENTRATION OF COAL (DIRECT METHOD)* C. BERTARD, B. BRUYET and J. GUNTHER Laboratoire de Verneuil-en-Halatte, Creil, France (Received 1 July 1968) Abstract--The present article is a report on a method which we have developed to measure the

  • (PDF) Determination of Coal Quality using Artificial

    Determination of coal quality using Artificial Intellige nce Algorithms Mirza Suljic, *Lejla Banj anovic-M ehmedov ic and Izet Dzananovic Facult y of Electrical Engineering, University of Determination method of initial gas desorption law of coal,2018-7-1 · Based on this finding, Kissell then established the industry standard for the determination of coal seam gas content, namely, the USKD desorption method, which has been widely used in various countries. In addition, this method is the basis for studying methods and indicators of coal and gas outburst prediction (Alexeev et al., 2007).

  • CDC Mining Direct Method Determination of the Gas

    The gas content of coal per unit weight as determined by the direct method test can be used as a basis for a preliminary estimate of mine ventilation requirements, and to determine if degasification of the coalbed in advance of mining should be Direct Method Determination of the Gas Content of Coal,2012-8-30 · DIRECT METHOD DETERMINATION OF THE GAS CONTENT OF COAL: PROCEDURES AND RESULTS by W. P. Diamond1 and J. R. Levine2 ABSTRACT The explosion hazard of methane-air mixtures has become an increasingly

  • An indicative method for determination of the most

    An indicative method for determination of the most hazardous changes in slopes of the subsidence basins in underground coal mining area in Ostrava (Czech Republic) Environ Monit Assess . 2013 Jan;185(1):509-22. doi: 10.1007/s10661-012-2571-7.NOVEL METHODS OF COAL SEAM GAS CONTENT ,With coal mining most gas volumes trapped in coal seams and strata are liberated which mostly end up in atmosphere. In order to assess fugitive emissions from mining new methods are devised. In situ gas content of coal seams is a primary parameter required in these methods. Traditionally the purpose of gas content determination in coal mines

  • Mining method selection and transition depth

    2021-5-5 · aimed at more specific mining methods. Bandophadhyay and Venkatasubramanian (1987) developed on of the first e studies on the implementation of expert system in the mining method selection process. It is developed to aid the mining engineers in selecting suitable mining methods for coal deposits minable by underground methods."Determination of the Gas Content of Coal" by Abouna ,In coal mining the gas content of coal is required primarily to quantify the gassiness of coal for safe mining, but also to quantify potential greenhouse gas emissions from mining. In Australia the gas content of coal is determined using a direct method, whereby the gas desorbed from solid or crushed coal is collected and the volume and composition of the desorbed gas are measured.

  • PREVIOUS AND CURRENT MINING METHODS.

    2021-1-29 · Mining method and equipment 4.2.1 General The bord and pillar mining layout will be maintained because of its reliability, flexibility, low capital cost, low working costs and large skills source availability (Woodruff, 1966). Increasing mechanization has resulted in an increasing production in the amount of the fine coalMicrowave Acid Digestion for the Determination of ,2021-7-8 · The sample preparation method used in this study for metal determination in coal by spectroanalytical technique is dry ashing, and wet acid microwave digestion. A method is developed of the sample pretreatment and preparation procedures for metal determination in CBA here. MW-AD followed by inductively coupled plasma-optical

  • Glossary of Mining Terminology Miners' Museum

    2019-6-26 · Coal A solid, brittle, stratified, combustible rock-like material formed by decomposition of plant vegetation that has been submitted to compaction and induration. Coal Analysis The determination by chemical methods of the amounts of various components of coal. Coal Ash Non-combustible material in coal. Coal Bank Exposed seam of coal.王志强 教授-能源与矿业学院 cumtb.edu.cn,2019-3-20 · (6)Research on mining technology of nether protective seam in inclined contiguous seams with continuous pressure-relief on outburst coal sea.Journal of Mining & Safety Engineering. 2013. (7)Method of division and engineering use of “three band”in the stope again.

  • Direct Method Determination of the Gas Content of Coal

    2012-8-30 · DIRECT METHOD DETERMINATION OF THE GAS CONTENT OF COAL: PROCEDURES AND RESULTS by W. P. Diamond1 and J. R. Levine2 ABSTRACT The explosion hazard of methane-air mixtures has become an increasinglyAn indicative method for determination of the most,An indicative method for determination of the most hazardous changes in slopes of the subsidence basins in underground coal mining area in Ostrava (Czech Republic) Environ Monit Assess . 2013 Jan;185(1):509-22. doi: 10.1007/s10661-012-2571-7.

  • Mining method selection and transition depth

    2021-5-5 · aimed at more specific mining methods. Bandophadhyay and Venkatasubramanian (1987) developed on of the first e studies on the implementation of expert system in the mining method selection process. It is developed to aid the mining engineers in selecting suitable mining methods for coal deposits minable by underground methods.In-situ coal strength determination -- Case studies (Book,1995-11-1 · Determination of coal seam strength has been addressed through the extrapolation of the coal strength obtained from a small number of samples on the whole section of the seam. This procedure often gives unreliable results. Presented in this paper is a method of in-situ strength testing of coal, allowing for a realistic determination of seam

  • IS 4433 (1979): Method for Determination of Hardgrove

    2018-11-15 · X8:4433-1979 Indian Standard METHOD FOR DETERMINATION OF HARDGROVE GRINDABILITY INDEX OF COAL ( First Revision ) 0. FOREWORD 0.1 This Indian Standard ( First Revision ) was adopted by the Indian Standards Institution on 15 April 1979, after the draft finalized byIS 1350-4-2 (1999): Methods of test for coal and coke,2018-11-15 · ISO/R 332 Determination of nitrogen in coal by the Kjeldahl method, and ISO/R 333 Determination of nitrogen in coal by the semi-micro Kjeldahl method. 0.4 In reporting the result of a test or analysis made in accordance with this standard, if the final value, observed or calculated, is to be rounded ofI,

  • Determination of Pb-210 and Po-210 in Aqueous

    2020-1-4 · The newly developed method can be applied for the analyses of all kinds of environ-mental water samples containing Pb-210 and Po-210; unpolluted natural waters, as well as waters polluted by mining activities, such as the coal mining affected area near Rheinberg (NRW) and uranium mining affected region of Mailuu Suu, Kyrgyzstan. Furthermore, theMicrowave Acid Digestion for the Determination of ,2021-7-8 · The sample preparation method used in this study for metal determination in coal by spectroanalytical technique is dry ashing, and wet acid microwave digestion. A method is developed of the sample pretreatment and preparation procedures for metal determination in CBA here. MW-AD followed by inductively coupled plasma-optical

  • Determination of an Optimum Interface between Open

    2021-12-23 · extracted by the UG mining method. Thus, the best interface between the OP and UG mining methods in such mines should be determined by balancing the pros and cons of these methods in contrast to each other. For example, in Table 1, the OP and UG mining methods are compared in regard with the total mining costs and the quality of extracted coal.Glossary of Mining Terminology Miners' Museum,2019-6-26 · Coal A solid, brittle, stratified, combustible rock-like material formed by decomposition of plant vegetation that has been submitted to compaction and induration. Coal Analysis The determination by chemical methods of the amounts of various components of coal. Coal Ash Non-combustible material in coal. Coal Bank Exposed seam of coal.