Integrated green mining technology of "coal mining …

The work developed the integrated green mining technology of coal mining, gangue washing-backfilling, strata control, and system monitoring. First, a production system was designed for surface-underground transportation of backfilling materials, underground gangue separation, multiple-seam combined backfilling, and …

Support technologies for deep and complex roadways in underground coal

Based on geological and mining characteristics, coal mine roadways under complex conditions were divided into five types, for each type the deformation and damage characteristics of rocks surrounding roadways were analyzed. The recent developments of roadway support technologies were introduced abroad, based on the experiences of …

CHAPTER 11 Mining Technology

Ch. 11—Mining Technology " 329. will be mined using one of the two under- ground mining techniques discussed below, Furthermore, several companies mining Fed- eral coal in the West have had to shift from surface to underground mining as their sur- face minable reserves became exhausted.

Coal mining

Coal mining - Underground, Surface, & Drilling: The various methods of mining a coal seam can be classified under two headings, surface mining and underground mining. Surface and underground coal mining are broad activities that incorporate numerous variations in equipment and methods, and the choice of which method to use in …

Advanced Underground Coal Mining and Ground Control …

New coal mining and roadway driving methods. Intelligent perception, analysis, and decision for underground mining. Large section chamber support theory and …

Safety first: Top mine tech for prevention and response

In response to the increasing need for improved safety systems in mines, introduced a new generation of integrated mine management software in 2011, MineStar. Following the theory that an intelligent, integrated management system, which combines several measures under the same roof, is the best form of incident …

Barriers to the Commercialization and Adoption of New …

The commercialization of underground coal mining technologies in the United States faces formidable barriers. This report presents results of a project …

Environmental cumulative effects of coal underground mining

In 2008, the coal production has reached 2.72 billion tons. Long-time and intensive mining has caused spatiotemporal cumulative effects on soil, water, air environment, and ecosystem, which include ground subsidence, hydrodynamics change, land use change, soil pollution, air pollution, and ecosystem evolution etc.

Technology Roadmap for Coal Sector

Technology Roadmap to Coal Sector Page 10 3. Opencast Coal Mining Technologies Present Technologies 3.1 Cyclic Mining 3.1.1 Shovel Dumper: It is the most sought-after technology in opencast mining due to its inherent flexibility of operationIt also offers flexibility for easy transition to any other technology or equipment configuration.

Underground mining of coal: Where we are and where …

Advanced Mining Technology Department CSIR-Central Institute of Mining & Fuel Research, Barwa Road, Dhanbad, 826 015. Phone: +91 326 2296017, Fax: +91 326 2296017/25 Email: pkmandal@gmail ...

Barriers to the Commercialization and Adoption of New …

Proximity Detection for Underground Coal Mines

Proximity Detection for Underground Coal Mines. By Strata Proximity Systems. Strata Worldwide has years of R&D and real-life experience with proximity detection and collision avoidance technologies. Working closely with mine managers and... Read more. Enter your details below to view the free white paper. By downloading this whitepaper, you ...

Innovation for sustainable mining: Integrated planning of …

Integrated planning of underground coal mining and mine reclamation. •. Prolong cropland use and increase land reclamation rate. •. Concurrent mining and …

Underground Coal Mining Methods and Their …

In underground coal mining, the working environment is completely enclosed by the geologic medium, which consists of the coal seam and overlying and underlying strata. Depillaring is one of the most …

Research and practice of intelligent coal mine technology …

The actual delay of 5G in underground remote control was found to be less than 50 ms, providing a valuable reference for scenario-based applications based on 5G technology. At present, underground coal mine positioning systems are mostly based on traditional wireless transmission technologies such as Bluetooth, ZigBee, and ultra …

Barriers to the Commercialization and Adoption of New Underground Coal

The findings are based on structured interviews with representatives of organizations involved in the U.S. underground coal mining technology market. The full scope of the project includes a workshop in which barriers will be refined and prioritized and options for eliminating barriers will be developed. The results of the workshop will be ...

Stress Relief Techniques in Underground Coal Mines

Stress Relief Techniques in Underground Coal Mines to Improve Safety. By Cartledge Mining and Geotechnics. It is a feature of underground coal mines in Australia that the deeper the operating depth, the greater the chance of increased horizontal stresses which can create... Read more. Enter your details below to view the free white paper. By ...

Intensive underground mining technologies: Challenges …

The article presents the key features of underground coal mining that influence the development of mining technologies and mining equipment design. It covers the most …

IoT and LoRa based smart underground coal mine …

This work uses LoRa communication protocol to connect the smart IoT devices deployed in the under-ground coal mines. A study on different toxic and poisonous gases that are generated in underground coal mine environments is presented. The proposed indexing system, MESI is developed based on this study.

Develops New Battery Technology for Underground Coal

Li-ion technology will be an evolutionary step change in technology for this product line. During the development of Li-ion batteries for underground use, also developed its own smart charging system. ... to the unfamiliar Li-ion batteries for underground coal mining applications, developed rigorous testing …

Ground control by L-shaped cemented paste backfilling technology …

Coal is a vital resource supporting China's economic development, with billions of tons of coal exploited from underground every year (Zhu et al. 2017; Guo et al. 2019a).Large-scale longwall mining of underground coal resources inevitably causes severe damage such as surface subsidence, water loss, infrastructure damage, and …

Modern Mining Underground | Anglo American

Here are some mining technologies currently in development at our mines: 1. Continuous haulage systems. We are also collaborating with on a continuous haulage system (CHS). This is a remote controlled device, that connects the RMDS to the mine's fixed conveyors. CHS is now being tested underground at Twickenham mine. 2. MM 220 …

Energies | Special Issue : Intelligent Coal Mining …

Environment perception and instant positioning is one of the key technologies destined to realize unmanned and autonomous navigation in underground coal mines, and simultaneous location and …

Navigation and positioning technology in underground …

underground coal mines due to the closed space and complex electromagnetic environment. Therefore, to mitigate mining safety risk and promote the technological revolution in coal mining, the ...

Coal India to close unsafe or underground coal mines

By GlobalData. A total of 65 workers died in in the first six months of 2016, with 18 people killed at the Lalmatia coal mine, owned by Coal India subsidiary Eastern Coalfields, in late 2016. A further 122 people were reported to have suffered serious accidents during this period, equating to a severe accident every one and a half days.

Trends in Modern Mining Technology

Here are some of the mining industry's latest technological innovations: 1. Spatial data visualisation. Mining is experiencing an exciting shift, thanks to spatial (or geospatial) data. Spatial data is becoming more detailed and clearer than ever: Three-dimensional (3D) Modelling creates a viewable, life-like impression with depth perception ...

Barriers to the Commercialization and Adoption of New Underground Coal

The commercialization of underground coal mining technologies in the United States faces formidable barriers. This report presents results of a project characterizing these barriers based on structured interviews and a workshop with representatives of organizations involved the U.S. underground coal mining …

Ten biggest producing underground mines in North …

The Harrison County Mine is a coal mine located in West ia, United States. Owned by ACNR Holdings, the greenfield project produced an estimated 8.649Mt of ROM in 2020. The mine had an estimated production of 6.227 mtpa of coal in 2020. 10. Ohio County Mine. Owned by ACNR Holdings, the Ohio County Mine is a coal mine situated in West ...

Innovation for sustainable mining: Integrated planning of underground …

Coal is the primary energy, generating 37% of the global electricity and more than 70% of steel (WCA, 2020).In China, ∼56% of energy and over 70% of electricity are produced by coal (Xie et al., 2019; Xu et al., 2017), with 85% of coal from underground coal mining (UCM) (Li et al., 2021).In 2021, the global coal output was 7.889 billion …

Precise application of grouting technology in underground coal mining

Many coal mines in China suffer from the Ordovician limestone (OL) and Carboniferous limestone (CL) containing water inrush frequently due to the complex geology condition; water inrush has become a serious disaster in coal mining. To prevent water-bursting disaster from the floor of mine and cutting down deaths and economic …

Prospecting Australia's Deepest Underground Coal Mine

Brisbane-based mining and geotechnical specialist firm, Cartledge Mining and Geotechnics (CM&G), is pushing engineering boundaries, providing technical solutions to what could be the nation's deepest* underground coal operation in Queensland. As Australia's shallow mining reserves become depleted, mines are progressively …

Advances in coal mining technology

The two main methods of coal mining – underground and surface mining – are first described. The following sections cover advances in coal mining machinery …

Underground space utilization of coalmines in China: A …

(a) Contour map of depth to underground water before coal mining, (b) Contour map of depth to underground water after coal mining (Yao et al., 2020a). Referencing to successful cases and considering the ecological characteristics of abandoned coalmines in China, Xie et al., 2015, Yuan et al., 2018, and Gu (2015) have …

Appendix F: Underground Coal Mining Methods and …

When the 1969 Coal Mine Health and Safety Act was enacted, U.S. coal production was about 600 million tons with about 60 percent underground mining and 40 percent surface mining. Longwall mining accounted for less than 1 percent of the underground production; room-and-pillar continuous mining accounted for about 50 percent of the …

Navigation and positioning technology in …

Navigation and positioning technology in underground coal mines and tunnels: A review. DOI: CC BY 4.0. Authors: Y. Cui. S. Liu. Q. Liu. Abstract and Figures.

Overview of Solid Backfilling Technology Based …

With the development and maturity of solid backfilling mining technology, underground coal-waste separation and in situ backfilling technology have sprung up and become an important way of realizing …

IoT and LoRa based smart underground coal mine …

The system adopted WSN based LoRa technology in underground coal mine. The work confirms that TTE wireless connectivity can be designed using LoRaWAN communication protocol. The developed system if deployed in an operational underground coal mine can minimize the risk of disasters and can ensure miners' safety. LoRa …