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·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 loss a grouting method
·and oversight for technology development and use in mining Three multiple fatality coal mining accidents in 2006 led Congress to pass the Mine Improvement and New Emergency Response Act MINER Act of 2006 Pub L 109 236 2006 Among other topics the MINER Act addresses research and development of safety technology for underground coal
·Conference Chinese and North American high extraction underground coal mining strata behavior and water protection experience and guidelines Mining in situations where there exists a potential hazard from inundation has always existed in coal mining and often reserves were left unmined in favor of reserves with no such hazard However
·Peabody Coal Company s Dugger strip mine and Bethlehem s Mine No 108 were awarded Sentinels of Safety trophies in 1978 for being the safest surface and underground coal mines in the country that
Scope Design manufacture and supply of four underground conveyor systems An underground sizing & splitter transfer station capable of joining three existing coal mines and enabling coal divergence from Mine A to either the coal preparation plant of Mine B via the Mine B conveyor clearance system and winder or the Mine C coal clearance system and drift conveyor
·Underground mining leads to surface subsidence vegetation degradation and environment damage In order to mitigate such negative influences this study focuses on subsidence characteristics and reclamation methods of the second coal mine in Zhaogu mining area Due to high groundwater table at the mine post mining land is divided into submerged
·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 billion tons with a growth rate of %
·This chapter explains underground and surface coal mining There are various types of coal with different heat contents Lignite has the lowest heat content Subbituminous coal bituminous coal and anthracite have higher heat contents with anthracite being
·Rockburst is a typical mining hazard which describes an uncontrolled and violent ejection of rock fragments with excessive seismic energy after fracturing rock blocks Cook 1965 It is referred to as coal burst in underground coal mines if the released seismic energy expels coal into mine openings Zhang et al 2017; Cai et al 2019 Coal bursts and rockbursts
·During energy transition where sustainability and environmental protection are increasingly prioritized ensuring safety in coal exploitation remains a critical issue especially in the context of worker safety This research focuses on predicting methane concentrations in underground mines which is vital for both safety and operational efficiency The article
·Underground coal mining causes strata movement and damage which has further led to releasing of coal bed gas and strata water Water and gas are the main origin of coal mine accident; meanwhile loss of underground water could cause destruction of surface vegetation and ecological environment especially in west arid and semi arid area of
·The Shendong Mining Area SMA at the junction region of Shaanxi Province and Inner Mongolia Autonomous region in northern China is a typical semi arid region Remote sensing RS and Geographic Information System GIS were used to construct an ecosystem service measurement and evaluation index system in a typical high intensity coal mining area
·Accurate localization in underground coal mining is a challenging technology in coal mine safety production This paper proposes a low cost battery free localization scheme based on depth images
·The underground environment of coal mine is complex noisy and uneven and there will be problems such as occlusion and high false detection rate during video monitoring
·Water control has been and remains a fundamentally important aspect of underground coal mine design and operation worldwide Mining in the vicinity of large bodies of water below a worked out
·Studies concerning thermal comfort are extremely important to ensure proper working conditions and the most efficient application of energy consumption [1 2 3] Thermal comfort models are widely used in closed and semi closed buildings underground structures and subway tunnels [4 5 6 7] In coal mining an underground production method is preferred in the
·High voltage mining equipment for use underground SECTION 1 SCOPE AND GENERAL PURPOSE This Handbook provides practical guidance for electrical equipment and practices associated with underground high voltage HV installations and HV mining equipment in order to protect the safety of people and property in mines SCOPE
·Coal has remained the primary component of China s energy structure and high intensity extraction has continued in the central and western coal producing regions of China In contrast to the abundant coal resources water resources have become extremely scarce in these regions creating a conflict between coal resource extraction and water resource
·However the mechanism of how land use changes resulting from underground coal mining affect ecosystem service remains unclear especially in areas with high groundwater levels To address this issue we studied the spatiotemporal in land use change in Jining City from 2000 to 2020 and employed Markov PIM probability integration method PLUS
·Compared to near sufrace mining deep underground mining is associated with challenges such as high temperatures humidity airborne dust rockbursts large scale cavings mud rushes rockfalls and airblasts mining induced seismicity the intersection of hazardous gases methane from the rock mass and toxic gases from blasting and diesel
·Life cycle assessment LCA is an effective tool for quantifying product sustainability Because it can quantitatively describe the burden of production on the environment ISO 14040 2006 it has been widely used in the industrial agricultural and other fields as indicated in the studies by Nabavi Pelesaraei et al 2019 Khanali et al 2021 Hou et al
·Based on the 7618 working face in Yaoqiao coal mine of Datun mining area the activation mechanism of water rich faults and the development characteristics of water conducting fractures in
·Now China has stepped up efforts to protect the environment which has led to the closure of coal mines in overlapping areas Xiao et al 2021a In addition in some resource based cities disorderly UCM has also triggered the resource curse and dutch disease Khan et al 2020 For example surface ponding caused by mining induced subsidence leads to
