Coal Mine Methane Drainage and Comprehensive Utilization in China

2013 ◽  
Vol 295-298 ◽  
pp. 3023-3026 ◽  
Author(s):  
Qing Ye ◽  
Yan Pi ◽  
Zhen Zhen Jia ◽  
Hai Zhen Wang
Keyword(s):  
Coal Seam ◽  
Coal Mine ◽  
Chemical Production ◽  
Efficient Utilization ◽  
Effective Utilization ◽  
Coal Mine Methane ◽  
Development Stages ◽  
Methane Drainage ◽  
Coal Seam Methane ◽  
Methane Utilization

According to situation of coal mine methane drainage and utilization, the five experienced development stages of coal mine methane drainage technology was summarized, the reasons of low rate of coal mine methane drainage were analyzed. Coal-seam methane utilization was analyzed from methane purification, methane generating electricity, chemical production, methane for civil utilization and utilization as automobile fuel etc. With the coal seam methane drainage quantity is more and more, the emissions requirements is more and more strict, so the emission reduction and effective utilization of this energy is important to accelerate efficient utilization of coal methane, reduce greenhouse gas emissions, protect environment, alleviate the supply contradiction of energy and realize sustainable development of coal mine etc.

Experimental study on the performance of drilling fluid for coal seam methane drainage boreholes

2020 ◽  
Vol 138 ◽  
pp. 246-255 ◽  
Author(s):  
Kai Wang ◽  
Zhen Lou ◽  
Lianhe Guan ◽  
Xiang Zhang ◽  
Binbin Qin ◽  
...  
Keyword(s):  
Experimental Study ◽  
Coal Seam ◽  
Drilling Fluid ◽  
Methane Drainage ◽  
Coal Seam Methane

EFFECT OF BLASTING ON METHANE DRAINAGE IN COAL SEAM

2020 ◽  
Vol 56 (5) ◽  
pp. 793-796
Author(s):  
M. V. Kurlenya ◽  
M. N. Tsupov ◽  
A. V. Savchenko ◽  
K. A. Pugachev
Keyword(s):  
Coal Seam ◽  
Methane Drainage

Three-Dimensional Numerical Simulation of the Mass Exchange Between Longwall Headings and Goafs, in the Presence of Methane Drainage in A U-Type Ventilated Longwall / Symulacja Numeryczna 3D Procesów Wymiany Masy W Układzie Wyrobiska Ścianowe Zroby, W Aspekcie Prowadzenia Odmetanowania Ściany Przewietrzanej Systemem Na „U”

2013 ◽  
Vol 58 (3) ◽  
pp. 705-718
Author(s):  
Przemysław Skotniczny
Keyword(s):  
Numerical Simulation ◽  
Rock Mass ◽  
Coal Seam ◽  
Mass Exchange ◽  
Experimental Analysis ◽  
Three Dimensional ◽  
Underground Mines ◽  
Test Cases ◽  
Methane Drainage ◽  
Invaluable Tool

Abstract The phenomena related to the occurrence of methane in underground mines pose a considerable danger in the process of coal seam exploitation. Quite often, experimental analysis falls short of investigating their areas of origin (goafs area, affected rock mass, the tail gate area with abandoned excavation). Therefore, an invaluable tool for evaluating the risk involved in the exploitation process might be the numerical simulation of the phenomenon in question, carried out with the use of the latest CFD methods. Due to its application, we are able to recreate and predict the mechanism of the studied phenomenon, with certain assumptions and simplifications made. The present paper discusses the results of the numerical simulation of the process of mass exchange occurring between affected rock mass and longwall headings. The calculations were performed for two test cases - 100 meter long walls.

scholarly journals The Combustion of Methane from Hard Coal Seams in Gas Engines as a Technology Leading to Reducing Greenhouse Gas Emissions—Electricity Prediction Using ANN

Energies ◽  
2020 ◽  
Vol 13 (17) ◽  
pp. 4429
Author(s):  
Marek Borowski ◽  
Piotr Życzkowski ◽  
Jianwei Cheng ◽  
Rafał Łuczak ◽  
Klaudia Zwolińska
Keyword(s):  
Coal Seam ◽  
Greenhouse Gas Emissions ◽  
Greenhouse Gas ◽  
Coal Mine ◽  
Electricity Production ◽  
Hard Coal ◽  
Neural Network Models ◽  
Gas Emissions ◽  
Methane Drainage ◽  
Geological Conditions

Greenhouse gases such as carbon dioxide and methane cause global warming and consequently climate change. Great efforts are being made to reduce greenhouse gas emissions with the objective of addressing this problem, hence the popularity of technologies conductive to reducing greenhouse gas emissions. CO2 emissions can be reduced by improving the thermal efficiency of combustion engines, for example, by using cogeneration systems. Coal mine methane (CMM) emerges due to mining activities as methane released from the coal and surrounding rock strata. The amount of methane produced is primarily influenced by the productivity of the coal mine and the gassiness of the coal seam. The gassiness of the formation around the coal seam and geological conditions are also important. Methane can be extracted to the surface using methane drainage installations and along with ventilation air. The large amounts of methane captured by methane drainage installations can be used for energy production. This article presents a quarterly summary of the hourly values of methane capture, its concentration in the methane–air mixture, and electricity production in the cogeneration system for electricity and heat production. On this basis, neural network models have been proposed in order to predict electricity production based on known values of methane capture, its concentration, pressure, and parameters determining the time and day of the week. A prediction model has been established on the basis of a multilayer perceptron network (MLP).

Analysis of Coal Mine Methane Development Technology in China

2013 ◽  
Vol 868 ◽  
pp. 326-330
Author(s):  
Xin Sun ◽  
Bai Sheng Nie ◽  
Sheng Chu Huang ◽  
Shou Tao Hu
Keyword(s):  
Coal Seam ◽  
Coal Mine ◽  
Coal Bed ◽  
Pressure Relief ◽  
Coal Mine Methane ◽  
Methane Drainage ◽  
Soft Coal ◽  
Methane Extraction ◽  
Development Technology ◽  
Soft Coal Seam

This paper introduces occurrence characteristics of coal bed methane in China, and analyses the influence of coal seam permeability on coal mine methane extraction. In addition, it presents the mechanism of increasing permeability by pressure relief. Lastly, the methane extraction technologies are discussed, and the applicable conditions of these technologies are analyzed. It is seen that choosing appropriate methane drainage technology, often in combination with several technologies including ground drilling, underground drilling, and pressure relief and permeability improving measures, is crucial for geological complex coal seam, especially low permeability soft coal seam.

Improvement of methane drainage in high gassy coal seam using waterjet technique

2009 ◽  
Vol 79 (1-2) ◽  
pp. 40-48 ◽  
Author(s):  
Tingkan Lu ◽  
Hong Yu ◽  
Tingyang Zhou ◽  
Jushen Mao ◽  
Baohua Guo
Keyword(s):  
Coal Seam ◽  
Methane Drainage

scholarly journals Determination of methane content and methane released when exploiting longwall at different levels at 13.2 seams, Khe Cham coal mine, Vietnam

2020 ◽  
Vol 211 ◽  
pp. 03017
Author(s):  
Van Thinh Nguyen
Keyword(s):  
Coal Seam ◽  
Coal Mine ◽  
Methane Emissions ◽  
Methane Content ◽  
Methane Drainage ◽  
Gas Explosions ◽  
Two Factors ◽  
The Relationship ◽  
Different Levels

Khe Cham coal mine is managed by Ha Long Coal Company TKV. Currently, Khe Cham coal mine is exploited from the ground up to 350 and is ranked III for methane. In 2008, a methane explosion at -168 level of the 13.2 coal seam of Khe Cham coal mine occurred, injuring 16 people and killing 8. In order to avoid gas explosions at mines like 2008, it is necessary to have appropriate solutions to eliminate methane accumulation in the pit paths. We have studied to determine the relationship between the level of methane emissions with the methane content in the coal seam and the bazaar’s mining output because of the methane content in the coal seam and coal mining output. These are the two factors that greatly affect the release of methane from the longwall. The paper used practical measurement, sampling, and analysis methods to determine the level of methane emissions from longwalls at different extraction levels of the 13.2 coal seam and determine the relationship between the methane drainage and the methane content in the coal seam and the exploitation output of the longwall. This relationship is expressed by the equation y = a.x2 + b.x + c (Fig. 2 and Fig. 3). The results will help with planning for mining and have specific solutions for diluting methane in the mine’s pit lines

scholarly journals DETERMINATION OF METHANE DESORPTION ZONE FOR THE DESIGN OF A DRAINAGE BOREHOLE PATTERN (CASE STUDY: E4 PANEL OF THE TABAS MECHANIZED COAL MINE, IRAN)

2021 ◽  
Vol 36 (1) ◽  
pp. 61-75
Author(s):  
Ali Hosseini ◽  
Mehdi Najafi
Keyword(s):  
Coal Seam ◽  
Coal Mining ◽  
Coal Mine ◽  
Methane Emissions ◽  
Gas Content ◽  
Coal Seams ◽  
Mining Operations ◽  
Methane Drainage ◽  
Tabas Coal Mine ◽  
Drainage Borehole

Underground coal mining is known as one of the major sources of methane emissions which mainly occurs after underground coal extraction. Rock strata in-situ methane can potentially be the most significant hazard in coal mining operations. To prevent or minimize the risks of methane emissions, methane drainage approaches have been adopted by coal mines. Rock mass methane drainage is the most efficient and effective approach toward controlling methane hazards as it prevents and reduces the frequency of methane emissions, outflows into the working area and sudden outbursts of methane and rocks. The method includes drilling boreholes from the tailgate side to the unstressed zone in the roof and floor strata above and below a working coal seam. The coal seam gas content in Tabas Parvadeh I is estimated to be about 16 m3 /t, which is relatively high. Based on exploration data, five distinct coal seams have been identified (B1, B2, C1, C2 and D) at the coal deposit and currently C1 is being worked. Considering the high value of C1 gas content and surrounding rocks, the Methane Drainage System (MDS) has been utilized for gas drainage. This paper tries to determine the desorption area which is essential and helpful for the selection of an effective drilling pattern into the adjacent coal seams. In this study, the methane drainage zone in the E4 panel of the Tabas coal mine was calculated using experimental equations and a drainage borehole pattern was determined.

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