Clean Mining Technology of Waste Not Discharged From Coal Mine

2012 ◽  
Vol 524-527 ◽  
pp. 552-556
Author(s):  
Dong Sheng Zhang ◽  
Tao Dong ◽  
Gang Wei Fan
Keyword(s):  
Coal Mining ◽  
Coal Mine ◽  
The Other ◽  
Mining Technology ◽  
Mining Technique ◽  
Key Points ◽  
Mining Face ◽  
Coal Pillars ◽  
Waste Separation

In order to solve the problem of heaping waste in aboveground, a cleanly mining technique of waste not discharged from coal mine was proposed. It includes two key points as follows: one is waste separation underground; the other is mining technique with preset packing body of waste without coal pillars. After the waste from the coal mining face had been separated out, the waste was used to preset packing body of waste. It is able to decrease stress of mine hoisting. The technique has been successfully used in Gaozhuang Coal Mine.

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.

Online shearer-onboard personnel detection method for the intelligent fully mechanized mining face

2021 ◽  
pp. 095440622110309
Author(s):  
Dong Wei ◽  
Zhongbin Wang ◽  
Lei Si ◽  
Chao Tan ◽  
Xuliang Lu
Keyword(s):  
Remote Control ◽  
Visible Light ◽  
Coal Mining ◽  
Detection Method ◽  
Industrial Test ◽  
Control Mode ◽  
Edge Preserving ◽  
Mining Technology ◽  
Visible Light Imaging ◽  
Mining Face

As unmanned coal mining technology gradually replaces the traditional mechanized coal mining technology, shearer operation mode is changed from local control to remote control in intelligent fully mechanized mining face. In remote control mode, it is difficult to protect the personnel who straying into the shearer operator space without observation and reminder from the shearer operator. Hence, it is necessary to establish an intelligent personnel detection method to protect the safety of coal miners in intelligent unmanned mining face. The environment of low and non-uniform illumination in fully mechanized coal mining face has seriously restricted the application of personnel detection technology based on visible light imaging. Therefore, a personnel detection method based on infrared thermal imaging is proposed in this paper to solve the disadvantages of using visible light imaging in downhole applications. On this basis, a spatiotemporal guided filter is proposed to harmonize the relationship between edge-preserving and noise-removing. Then, an improved Lucas-Kanade method based on the adaptive-size window is utilized to achieve a more robust personnel detection. Moreover, the personnel detection in the shearer operating space is realized based on epipolar geometry and morphology processing. Finally, the laboratory experiment and industrial test are carried out to evaluate the proposed method, and the results indicate the feasibility and superiority of the proposed methods which show considerable application prospects.

Mining pressure monitoring and analysis in fully mechanized backfilling coal mining face-A case study in Zhai Zhen Coal Mine

2015 ◽  
Vol 22 (5) ◽  
pp. 1965-1972 ◽  
Author(s):  
Qiang Zhang ◽  
Ji-xiong Zhang ◽  
Tao Kang ◽  
Qiang Sun ◽  
Wei-kang Li
Keyword(s):  
Coal Mining ◽  
Coal Mine ◽  
Pressure Monitoring ◽  
Mining Face ◽  
Mining Pressure

scholarly journals Control of the Internal and External Staggered Distance of Coal Mining Face to the Water-Conducting Fissures in the Overlying Strata of the Near Coal

2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Zhiyuan Jin ◽  
Tao Peng
Keyword(s):  
Coal Seam ◽  
Coal Mining ◽  
Coal Mine ◽  
Calculation Formula ◽  
Coal Seams ◽  
Coal Face ◽  
Geological Conditions ◽  
Mining Face ◽  
Seam Mining ◽  
Water Proof

In Northwest China, rainfall is low, water resources are scarce, and the ecological environment is fragile. For shallow-buried and close-spaced coal seams with a thickness of upper coal bed >60∼70 m, the water-conducting fissures of the overlying rock will not penetrate the water-isolating layer after the upper coal seam is mined; the internal and external gap angles of the water-conducting fissures are not generated from the water-isolating layer. We set out to explore the critical internal and external dislocations for the second significant development of water-conducting fissures in the overlying rock after coal mining under control. A calculation model for the critical internal and external staggered distances of coal mining face in shallow-buried and close-spaced coal seams is established, the calculation formula is given, and the calculation formula for the critical seam mining ratio under the condition of internal staggered mining mode is given. Numerical simulation performed by UDEC methods: taking the overburden strata in the shallow-buried and close-spaced coal seam mining area of Shigetai Coal Mine as a prototype, it was verified that the critical internal and external offsets of the coal mining face in shallow-buried and close-spaced coal seams have a significant effect on the overlying water flow cracks in the mining of the lower coal seam. For the feasibility of developmental control, according to the engineering geological conditions of Shigetai, through the calculation method of external staggered distance, it is concluded that the distance of the open cut of the lower coal face and the upper coal face is only 21∼27 m, which is much smaller than the water barrier. It does not produce the critical distance of the water-conducting cracks. Therefore, in the process of mining the lower coal seam, the water-proof layer will produce water-conducting cracks, lose its water-proof performance, and cause water loss. This is also the cause of the water inrush accident in Shigetai Coal Mine.

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.

Research on Upper Limit Increased of Mining in Coal Mining Face

2015 ◽  
Vol 737 ◽  
pp. 846-850
Author(s):  
Yong Jun Li ◽  
Chen Li ◽  
Hao Sun ◽  
Hai Tao Xu
Keyword(s):  
Coal Mining ◽  
Coal Mine ◽  
Coal Pillar ◽  
Economic Benefits ◽  
Production Ratio ◽  
Working Face ◽  
Zone Development ◽  
Mining Face ◽  
North China Area ◽  
Important Significance

In order to guarantee the safety of the coal mine, needing to leave in reasonable waterproof safety coal pillar. Aiming at the working face 3311 of Xuchang coal mine, this article based on the analysis to the basis of factors for improving the mining limit, using UDEC numerical simulation, the regulations of coal mining under buildings, railways and water bodies and historical experience to analyze crack-production ratio of the working face, study the height of water flowing fractured zone development, designing test mining program. Through the upper mining limit to liberate 160000t coal resources and to gain the obvious economic benefits, which provide important significance for other similar coal mines in coal field of North China area.

scholarly journals A PROFICIENT DETECTION AND RESCUE ASSISTING SYSTEM TO COMBAT FIRE ACCIDENTS OCCURRING IN UNDERGROUND COAL MINES

2020 ◽  
Vol 5 (5) ◽  
pp. 128-133
Author(s):  
Shirazuddin ◽  
Syed Musthak Ahmed
Keyword(s):  
Coal Mining ◽  
Coal Mine ◽  
The Other ◽  
Underground Coal Mine ◽  
Safety Issues ◽  
Industrial Sectors ◽  
Underground Coal Mines ◽  
Side Walls ◽  
Fire Accidents ◽  
Harsh Conditions

Working in the field of Coal Mining (CM) is well known and considered among the most dangerous occupations when matched to many other industrial sectors[1], the safety issues associated with the CM workings gets worse when mining is carried out in the underground environment. In addition to the dangers coupled with the fall of roof, side walls and other harsh conditions in the Underground Coal Mine (UCM), the UCM suffers with additional threats such as the gas leakages, heating of coal and the other causes of fire accidents. All these factors raise concerns on improving the safety in the UCMs. The paper presented here focuses and recommends a safety system to tackle the accidents due to fire and to form a rescue assisting system.

Narrow Pillar Mining Technology of Fully Mechanized Sublevel Caving Faced with Great Cutting Height in Tashan Mine

2013 ◽  
Vol 295-298 ◽  
pp. 2950-2953
Author(s):  
Yuan Fan ◽  
Wei Dong Pan ◽  
Zhao Hui Wang ◽  
De Lin Li ◽  
Wen Bo Song
Keyword(s):  
Coal Seam ◽  
Reference Value ◽  
Mining Technology ◽  
Mining Technique ◽  
Sublevel Caving ◽  
Pillar Mining ◽  
Coal Pillars ◽  
Cutting Height ◽  
Theory Research ◽  
Mining Height

Based on the great thickness of coal seam in Tashan Mine, narrow pillar mining technology was adopted to liberate more coal resources from coal pillars. In this paper, the research status of narrow pillar technology was analyzed, and the main problems of the narrow pillar mining technique were solved by theory research. The method and technical route of this study was offered in final. The results have great reference value to the fully mechanized sublevel caving with great mining height in similar conditions.

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