Recycling utilization patterns of coal mining waste in China
Fly-ash and coal gangue are the two main industrial solid waste in China. The chemical compositions (shown in Table 1) were SiO 2, Al 2 O 3, Fe 2 O 3 and some impurities. As the coal gangue is main solid waste for coal mining, one of the most common approaches to waste rock is to stack construction that encapsulate the most pyrite rich …
Comprehensive overview: Fleet management drives green …
The mining industry, which emits 4–7% of global greenhouse gas emissions, is regarded as one of the key energy-intensive sectors for carbon reduction [8].As an important method of mineral resource extraction, direct carbon emissions from production activities contribute up to 45–60 % of the total mining lifecycle, and energy consumption …
A new solution to enhance cuttings transport in mining …
In horizontal drilling, the cuttings bed is frequently formed to result in severe problems such as backing pressure, binding of bottom hole assembly (BHA) and even sticking of tool. Practice and research show that the smaller particle size is, the more favorable to carry out from bottom of hole in extended reach well or horizontal well. This …
Progress and advancements of coal mine gas control and …
In this new situation, the future innovative development of China's coal mine gas control is discussed in six directions: continuously promoting the construction of …
Surface Coal Mining Methods in China
Surface coal mining methods used in China fr om 1949 to 1980 were mostly open pit method ... conveyor system for the coal transportation fr om pit to the washing plant or storage areas. ... Weitong, Zhangxianchen, Wangyujun et al, Research of the strategy of China s coal development, Shanxi science an d technology press, 1995.11. [3] Kennedy …
Potential impacts of coal mining activities on nitrate
In practice, mining activities can lead to the release of nitrogen from strata, in turn contributing various forms of nitrogen to surface waters. Coal mining has also been observed to connected to elevated nitrate levels in ground-water in coal mining areas in North China (Zhang et al. 2015; Feng et al. 2020; Hu et al. 2021), Punjab (Kumar
Energies | Free Full-Text | Research Status and Development …
Unmanned driving technology has always been one focus of mine smart transportation, which is a crucial component of smart mines. However, the descriptions of both the intelligent transportation system and its industrial application are not comprehensive. In order to have an all-encompassing and comprehensive …
Research on the low carbon development path of China's …
Coal industry is one of the important engines of China's economic development and one of the key units in advancing the goal of C O 2 peaking and C O 2 neutrality. This study systematically measured the C O 2 emissions of coal resources at the stages of mining and washing, transportation, processing and conversion, and …
Development overview of paste backfill technology in China…
Although coal has made a great contribution to China's economic and social development, the traditional mining methods of coal resources have caused many problems (Ahern and Hendryx 2012; Adibee et al. 2013; Bernhardt et al. 2012; Chen et al. 2014; Hussain et al. 2016; Kurth et al. 2015; Song and Wang. 2019), such as the …
Application and Development of Smart Mine in China
mechanized mining face in the co al mining process. ... mining, transportation, washing, safety, ecological protection, production management and so on. ... Journal of China University of Mining ...
Soil heavy metal pollution and food safety in China: Effects, …
In 2014, the Ministry of Environmental Protection (MEP) and the Ministry of Land and Resources (MLR) of China issued a joint report on the current status of soil contamination in China, the nationwide surveys of soil were conducted between 2005 and 2013, covering more than 70% of China's land area (Zhao et al., 2015). The survey …
Life cycle assessment of underground coal mining in China
Highlights. •. LCA was conducted on coal production of a typical coal mine in China. •. Key environmental impact categories and key impact processes were …
A survey on hazardous materials accidents during road transport …
Therefore, this study constructs a logistic regression scorecard model to evaluate transport risk of hazardous chemical transport companies and evaluates it using a case study in China. This study first selected 16 indicators from the dimensions of driver behaviors, driving performance, dangerous goods and company business operation to ...
Recent developments in coal mine methane extraction and utilization in
Chinese safety regulations of coal mine stipulate that the pre-mining coal seam must be pre-drained to decrease the gas pressure and content below the safety margin of 0.74 MPa and 8 m 3 /t, respectively (State Administration of Coal Mine Safety of China, 2011).Otherwise it may easily cause coal-gas outburst, gas exceeding the limit in …
IJERPH | Free Full-Text | The Recent Progress China Has …
As a mining power, China is one of the first countries to put forward the concept of "green mining". Over the years, as people emphasize safety and environmental protection, green mining technology has become the hot topic. ... In the area of transportation, Shah, K. J. et al. proposed the concept of green or sustainable …
Autonomous mining through cooperative driving and …
1 Citations. Metrics. Abstract. Autonomous mining is promising to address several current issues in the mining sector, such as low productivity, safety concerns, …
Progress and advancements of coal mine gas control and …
1. Introduction. China's overall energy structure is characterized by scarcity of gas, limited oil, and relative abundance of coal. In 2022, coal accounted for 56.2% of China's primary energy consumption [1], and the external dependence on oil and natural gas reached 71.2% and 41.2%, respectively.The Chinese Academy of Engineering …
Disposal of drilling waste in salt mines in China
During the filling, all caverns were kept full of brine, and the waste slurry was pumped into the caverns using special transport pipes (Wolters et al., 2017). ... Ninety-five percent of these mines are underground well salt mines, and after decades of large-scale solution mining, China has become the world's largest producer of well salt ...
The cost of corrosion in China | npj Materials Degradation
It was estimated that the direct corrosion costs in coal mining industries in China was 84.70 billion RMB, representing 4.67% of the total annual production value of coal. ... Al-Kharafi, F., Al ...
A Review of Intelligent Unmanned Mining Current Situation …
Song et al. reviewed the application status of five types of coal mine robots in China and abroad, including tunneling, coal mining, transportation, safety control …
Trends of hazardous material accidents (HMAs) during …
The time distributions of the HMAs are shown in Fig. 1. Fig. 1 (a) reflects the yearly level, Fig. 1 (b) reflects the monthly level, Fig. 1 (c) reflects the weekly level, and Fig. 1 (d) reflects the hourly level. Note that the Y-axis in Fig. 1 indicates the number of HMAs during highway transportation. Fig. 1 (a) and (b) show the annual and monthly trends …
Environmental impact of mining-associated carbon …
In recent years, concern has been increasing regarding the carbon emissions generated by mining activities. China is an extremely large coal producer (3695 Mt/2015) and consumer (3698 Mt/2015), and Shanxi Province (i.e., a major coal-producing province in China) is a crucial element in China's energy conservation and emission …
China's mining industry
With more than 1,500 mining operations, of which approximately three-quarters are located underground, the value of China's mineral production amounted to a 1.5 percent share of the country's ...
Review of soil heavy metal pollution in China: Spatial …
Gansu Province in Northwest China has a long history of ore mining, especially the Dexing copper mine (Teng et al., 2004), Tongling iron mine (Wang et al., 2004) and Daye mining area (Guo et al., 2011; Du et al., 2015), that has resulted in combined heavy metal pollution.
Mining factors affecting taxi drivers' incomes using GPS trajectories
Taxis provide essential transport services in urban areas. In the taxi industry, the income level remains a cause of concern for taxi drivers as well as regulators. ... And this study was supported by National Science Foundation of China (51422812), and the Fundamental Research Funds for the Central Universities. ... H. Cao et al. Mining ...
The story of coal in China: from ornaments to critical
The combination of archaeological and textual evidence has allowed scholars to build a convincing, if not complete, account of coal mining and utilisation in …
Regional distribution characteristics and ecological risk assessment …
Mining activities have introduced various heavy metals and metalloids to surrounding soil environments, causing adverse impacts to the ecological environment system. The extremely high concentration of various heavy metals and metalloids make the Xikuangshan (Hunan, China) an excellent model to assess their ecological risk.
Unidirectional transport in amorphous topological photonic …
Many works on topological insulators have focused on periodic lattice systems; where short- and long-range order is considered. Here we construct a two-dimensional amorphous photonic crystal with short-range order and a controllable level of long-range order and experimentally investigate the transport of topological edge states …
Fluidized mining and in-situ transformation of deep
Thus, coal-fired power generation is the largest source of carbon emissions in China (Yu et al. 2014). Moreover, the improvement in residents' living standards and the growth of the population are expected to lead to an increase in global demand for electricity consumption. ... The proposed method also improves the mining, transportation ...
Carbon emission coefficient measurement of the coal-to …
CO 2 emissions coefficient of the coal-energy chain in China is currently at 875 g/kW h −1.. The emission coefficient is a relatively low level compared with other countries. • CO 2 is the main type of GHG emission and the most direct emission in the chain.. A great decline of potential energy use exists in the coal mining process of …