نتایج جستجو برای: Coal mine

تعداد نتایج: 51787  

2012
RAJKUMAR BODDU

In this work, a safe Coal Mine Monitoring system which replaces the traditional coal mine monitoring systems which tend to be wired network systems. This play an important role in coal mine safe production. With continuous enlarging of exploiting areas and extension of depth in coal mine, many laneways become monitoring blind areas, where are lots of hidden dangers. Moreover, it is inconvenient...

Journal: :iranian journal of public health 0
jizu li institute of economic management, taiyuan university of technology, p.r. china. yuejiao li institute of economic management, taiyuan university of technology, p.r. china. xiaoguang liu institute of economic management, taiyuan university of technology, p.r. china

background : in china, over 80% of all work-related deaths in the mining industry occur in coal mines and human factors constitute 85% of the direct causes of coal mine accidents, which indicates that significant shortcomings cur-rently exist in the safety behavior management of chinese coal mine workers. we aimed to verify the impact of human psychological behavior in coal mine accidents syste...

Journal: :IJDSN 2013
Shengbo Hu Heng Shu XiaoWei Song

It is very important to detect a collapse hole for coal mine workers. The possibility of detecting the collapse hole using WSN is presented, because the tunnel in coal mine is narrow and the poor working condition. Comparing three types of the hole detection methods, it is seen that the connectivity based methods are used to detect coal mine collapse better than other methods. By establishing a...

One of the main concerns of an underground coal mining engineer is the safety and stability of the mine. One way that the safety and stability can be ensured is to know and understand the coal mine geology and how it reacts to the mining process. One technique that has shown a lot of success in the coal mining industry for geologic technical evaluation purposes is the coal mine roof rating (CMR...

2007
Guozhi Lu Jianquan Tang Chunhui Yao Lei Yang

In this paper, by analyzing the coal mine safety accident of present stage, the author has come to a conclusion that the safe accidents on coalface accounting for a lot of coal mine safety accident, and has brought forward the cause leading to this phenomenon. Then, through the discussion about “Overlying Strata Movement Law”, this author has suggested that Electronic Business can be used for t...

2014
Duan Zhao Enjie Ding Xin Wang

We proposed a novel ray-tracing based radio waves propagation (RTRWP) Law suitable for under-tunnel complex coal mine workface. The energy consumption model evaluation in complex coal mine workface is derived. Theoretical analysis about calculating the multiple reflections of the radio waves in coal mine workface is also provided. Computer simulations and field tests in workface tunnels show th...

شمعانیان, غلامحسین, قلی پور, محسن, مظاهری, سید احمد, رقیمی, مصطفی,

Nowadays, acid mine drainage (AMD) is one of the most important problems in coal mine contamination. The Karmozd coal mines in Mazandaran Province are one of the largest and oldest coal extractions in Central Alborze Coal Basin. The samples of coals, host rocks, mine drainages and secondary surface minerals have been collected in summer season of 2005. On the basis of hydrogeochemistry studies ...

2012
Qiang Wang Feng Yang

This paper analyzes the coal mine of things to be solved key technical problems in order to improve things in the coal mine the diagnostic accuracy of fan failure, the use of mechanical failure analysis UCI database data sets for analysis. According to the coal mine of things to determine the characteristics of the fan through the vertical amplitude of the frequency, the base rate of vertical v...

2013
G.Ahalya P.Suresh

In this work, a system is proposed for safe Coal Mine Monitoring, which plays an important role in coal mine safe production. Wi th continuous enlarging of exploiting areas and extension of depth in coal mine, many laneways become monitoring blind areas, wh ere are lots of hidden dangers. It is very difficult to lay cables which are not reliable and not effective. For to overcome this , a new s...

Journal: :international journal of mining and geo-engineering 0
ehsan farahbakhsh department of mining & metallurgical engineering, amirkabir university of technology (tehran polytechnic), tehran, iran mohammad javad pourjafari department of mining & metallurgical engineering, yazd university, yazd, iran lohrasb faramarzi department of mining engineering, isfahan university of technology, isfahan, iran taymor eslamkish department of mining & metallurgical engineering, amirkabir university of technology (tehran polytechnic), tehran, iran

in the present study, an investigation was carried out on parvadeh coal mine in tabas, iran, to survey the effect of fractures on unusual methane gas emission in coal mines. this coal mine was chosen for investigating because of its high methane gas content in the coal body and available data from sensors in desired locations. gas concentration monitoring programs were carried out at the mine s...

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