The Research Progress of Coal and Gas Co-Mining

2012 ◽  
Vol 524-527 ◽  
pp. 489-493 ◽  
Author(s):  
Li Ming Ying ◽  
Jie Chen ◽  
Chao Du ◽  
Lin Xiang Pang ◽  
Yong Jiang Wen
Keyword(s):  
Coal Mine ◽  
Greenhouse Gas Emission ◽  
Research Progress ◽  
Coal Bed ◽  
Gas Extraction ◽  
Gas Emission ◽  
Extraction Technology ◽  
Pressure Relief ◽  
Adjacent Layer ◽  
Improve Energy Efficiency

The coal bed methane is an important part of the Chinese energy. To finding some effect ways to collect gas during the coal mining process will increasing the using rate of coal mine and reducing greenhouse gas emission. The most effective way is coal and gas co-mining, and the main technology of the coal and gas co-mining are gas pre-extraction before mining, gas extraction of pressure relief, gas extraction of adjacent layer, gas extraction of goaf and top fractured zone, Gas extraction of excavation roadway and so on. Based on the technique system of coal and gas co-mining and the key problems existing in coal and gas extraction technology, to improve energy efficiency and reduce coal mine disaster.

scholarly journals Study on Optimization of Gas Drainage Methods in High-burst Mines

2019 ◽  
Vol 118 ◽  
pp. 03034
Author(s):  
Fengfeng Yang ◽  
Dongfang Gao ◽  
Jufeng Zhang ◽  
Kezhen Zhao ◽  
Tai Xu ◽  
...  
Keyword(s):  
Coal Mine ◽  
Extraction Method ◽  
Gas Extraction ◽  
Gas Emission ◽  
Gas Drainage ◽  
Composition Ratio ◽  
Gas Outburst ◽  
Actual Production ◽  
Extraction Parameters ◽  
Production Conditions

After the mechanization upgrade of Yongjing Coal Mine, the original extraction method cannot solve the problem of gas. According to the actual production conditions of the mine, the source and composition ratio of gas emission are analyzed.By combining with the gas extraction method before upgrading and transformation, it is of great importance to determine the appropriate comprehensive gas extraction method and optimize the gas extraction parameters for improving the gas extraction effect and eliminating the risk of gas outburst.

scholarly journals Overview of Solid Backfilling Technology Based on Coal-Waste Underground Separation in China

2019 ◽  
Vol 11 (7) ◽  
pp. 2118 ◽  
Author(s):  
Qiang Zhang ◽  
Jixiong Zhang ◽  
Zhongya Wu ◽  
Yang Chen
Keyword(s):  
Coal Mining ◽  
Coal Mine ◽  
Surface Subsidence ◽  
Separation Method ◽  
Dense Medium ◽  
Research Progress ◽  
Coal Waste ◽  
Gas Extraction ◽  
Water Separation ◽  
Waste Separation

China is the world’s largest coal producer country. However, large-scale coal mining has led to severe environmental pollution issues such as surface subsidence and gangue piling up. The gangue discharging amount has ranked the first in the world and coal mine enterprises are facing enormous discharging reduction pressure. This paper summarizes the research progress of the solid backfilling mining technology and then illustrates the realistic demands and significance of implementing underground coal-waste separation. It also focuses on the technical principles, systems and key equipment of the common underground coal-waste separation methods, such as the selective crushing method, the dense medium shallow groove method, the vibro-assisted jigging method and full-size water separation method and ray identification method. In addition, the selection steps of underground coal-waste separation method, the design process of large section separation chamber and the design principle of separation and backfilling system are proposed, finally, the mining-separating-backfilling + X for coal mining is put forward. By combining the technology of mining-separating-backfilling with other technologies, such as gob-side entry retaining with non-pillar mining, gas extraction, solid waste treatment, water protection mining, mining under buildings, railways and water bodies, the integrated mining methods, mining-separating-backfilling + setting pillars, gas drainage, treatment, protection and prevention methods are formed. It also introduced the ‘mining-separating-backfilling + gas extraction’ technology’s whole idea, system arrangement, separation equipment and practical engineering application effects based on the specific engineering case of pingmei no. 12 coal mine. The results indicate that the integration of underground coal-waste separation and solid backfilling technology could achieve gangue discharging reduction, underground washing and surface subsidence control. It is effective at realizing green mining.

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.

Study on Factors Influencing Stability of Surface Extraction Borehole above the Goaf

2013 ◽  
Vol 295-298 ◽  
pp. 3265-3270
Author(s):  
Ri Fu Li ◽  
Guang Cai Wen
Keyword(s):  
Numerical Simulation ◽  
Coal Mine ◽  
Space Time ◽  
Gas Extraction ◽  
Extraction Technology ◽  
Surface Extraction ◽  
Factors Influencing ◽  
Research Promotion ◽  
The Stability

The paper is based on surface gas extraction technology from boreholes in the goaf in Zhangbei Coal Mine ,Huainan Mining Group .With the method of numerical simulation ,the authors have made analysis on the space-time cracking and moving law about the overburden of mining field during exploiting by contrasting extraction data about boreholes in Huainan Mining Group .Besides ,paper provides conclusion and advices on promoting the stability of borehole in the end .To some extent ,the paper is of instructive significance for the research ,promotion and application of gas extraction technology from the goaf .

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