Menu
Mobile crushers can also be called mobile crushing plants, mobile crushers, etc. It is an inevitable product of high-tech crushing technology in the new era, and its main features are that it can be operated mobilely, can walk freely, and is more convenient for transitions, ensuring that the equipment While the production is safe, the work process is more reliable.
·In solid backfill coal mining SBCM loose gangue backfill material LGBM is used to backfill the goaf after coal resources are exploited from the underground mines Under certain geological conditions LGBM with a certain height may be soaked in the water and then becomes saturated significantly altering its mechanical properties The confined compression
·Coal gangue material is an unavoidable byproduct produced during the processing of coal mining activity It was reported that the enhancement in coal mining activity release some nonessential heavy metals especially from coal gangue creates adverse impacts on environment which is matter of concern Sun et al 2009; Zhang et al 2009
·To solve the problem of gangue discharge in coal mining fluidized gangue filling technology was developed The key scientific problem of this technology is the diffusion characteristics of the
·The accumulation/improper treatment of coal gangue will not only lead to waste of land but also cause environmental pollution Especially the impact of radioactive elements on the surrounding ecological environment is widely concerned by many scholars In this study the concentration of radioactive elements uranium U and thorium Th of small scale coal
·the Yushen mining area began adopting modern coal mining technologies such as large working faces and one time full height mining Due to the shallow burial of coal seams thin Fig 1 Idea of subsequent space gangue grouting lling technol ogy Delayed backfilling distance Main roof Fractured zone Immediate roof Cavingz one Continuous bending
·In LTCC mining the natural ray coal gangue identification technology heavily relies on the immediate roof of the coal seam As such the roof deposition characteristics of thick and extra thick
·1 School of Mines China University of Mining and Technology Xuzhou China; 2 State Key Laboratory of Coal Resources and Safe Mining China University of Mining and Technology Xuzhou China; 3 The Key Laboratory for Traffic and Transportation Security of Jiangsu Province Huaiyin Institute of Technology Huaian China; Gangue is the main
·There is a huge amount of solid waste generated in coal resource exploitation and utilization leading to effects on the environment and hindering sustainable development Aiming at the difficulty of disposal of coal based solid waste from high yield high efficiency mines this research proposed a technique of gangue grouting filling in subsequent space GGFSS
·Coal mining a major industry inadvertently contributes to environmental pollution with coal gangue identified as a significant source of contamination 1 studies have indicated that
·The diffusion characteristics of fine grained gangue slurry are significant for gangue consumption and ecological environment protection especially in underground mines Therefore based on the theory of porous medium transportation this paper establishes a 3D caving zone model proposes methods for reconstructing statistical and analytical voids
·The Huainan coal mining area is a typical coal mining area with high phreatic water level and water accumulation in the coal forming subsidence areas is serious Yao et al 2010 The long term water rock interaction between water and gangue might lead to migration and transformation of heavy metals causing heavy metal enrichment in coal
Coal mining with partial gangue backfilling CMPGB method has the advantages of both high filling efficiency and excellent workface capacity which breaks through the technical bottleneck of full section backfilling mining In order to reveal the fracture mechanism and characteristics in CMPGB workface this paper presents a comparative analysis of the filling ratio of different
·Coal gangue has become one of the largest industrial solid waste in China but it is also a kind of reserve resources Representative coal gangue samples from different coal mines mainly in Permo Carboniferous and Jurassic in Weibei area in Shaanxi Province are collected and potentially useful elements Al Fe Ga Ge U in coal gangue are analyzed The results
·In solid backfilling coal mining SBCM the deformation resistance of crushed gangue particle material CGPM is critical for controlling overburden strata movement and ground surface subsidence that is produced during the excavation process of rock roadway and coal roadway of the gangue dump of Pingdingshan coal mine in Henan
·However a substantial amount of coal gangue was generated and discharged during the coal mining washing and processing processes Coal gangue a black gray rock with lower carbon content and heat value compared to coal accounts for about 15% 20% of coal production Li et al 2006 The production of coal gangue was conservatively estimated based
·Coal mining is indispensable due to the widespread use of coal and gangue is the accumulated solid waste byproduct that persists in mined lands even after the mines have been abandoned the
·The movement characteristics of overlying strata above the fully mechanized coal mining face backfilled with gangue and the traditional fully mechanized mining face were compared It is found that
·Gangue grouting filling in subsequent space of coal green mining methodology and case study Kunpeng Y u 1 · Liqiang Ma 1 2 · Ichhuy Ngo 1 · Jiangtao Zhai 1 · Yujun Xu 3 · Zhiy ang Zhao 1
·To address the environmental issues and safety hazards caused by surface accumulation of gangue research on comprehensive utilization and backfilling mining of coal gangue has been conducted both
The cemented coal gangue backfill CGB in coal mining is normally made of gangue particle size of 0 15 mm fly ash cement and water In this study the effects of the weight content ranging from 20% to 60% of fine gangue 0 5 mm on the microscopic characteristics resistivity and compressive strength of CGB were investigated at 3 d and 28 d curing times respectively
Coal mining is accompanied by the discharge of solid waste such as coal gangue and the control of mining pressure and surface subsidence Promoting the green development of coal mines will be an important mean of protec ting the ecological environment of the mining area from the source The overall consideration of the relationship among coal mining raw coal processing
·The backfilling mining method that fills gobs with coal gangue can prevent water inrush hazards protect groundwater resources and protect the ecological environment of the mining area However initial conditions including the particle size distribution of gangue and the stress environment may affect the seepage characteristics of gangue backfill and inrush
DOI / Corpus ID 270717324; Preparation of technosol based on coal gangue and its impact on plant growth in coal mining area article{Liu2024PreparationOT title={Preparation of technosol based on coal gangue and its impact on plant growth in coal mining area} author={Xianghong Liu and Jin Zhang and Qiang Li and Weidong Liang}
·The long term high yield production of coal has resulted in the large scale accumulation of coal gangue on the ground surface which causes serious environmental problems Therefore clean and environmental treatment of coal gangue is urgently needed In this study the inductively coupled plasma mass spectrometer and atomic fluorescence
Coal is the primary energy source in China accounting for approximately 94 % of the country s fossil energy resources far exceeding oil and natural gas [1] However coal gangue a solid waste generated during coal mining constitutes about one fourth of the raw coal output and causes severe environmental pollution
·coal gangue As a pioneer species puff balls absorbed the hazardous trace elements in coal gangue matrix to reduce its eco toxicity on the other hand it raised the pH value of coal gangue improving the vegetation growing condi tions for coal gangue matrix to a certain extent and laying the foundation for ecological restoration of coal gangue
