Results 31 to 40 of about 6,878 (277)
Formation mechanism and height calculation of the caved zone and water-conducting fracture zone in solid backfill mining [PDF]
International Journal of Coal Science & Technology, 2020 AbstractTo study the heights of the caved zone and water-conducting fracture zone in backfill mining, the failure mechanism of strata during backfill mining was analyzed, and a method for determining the heights of the two zones was proposed based on key strata theory.
Lei Li +4 more
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Meikuang Anquan, 2022 In order to accurately predict the development height of water-conducting fracture zone in the roof of fully mechanized caving coal of No.3 coal seam in Tengzhou Mining Area, based on the measured data of water-conducting fracture zone height and main ...
CAO Shiyou +8 more
doaj +1 more source
Electrical Anisotropic Response of Water Conducted Fractured Zone in the Mining Goaf
IEEE Access, 2016 Based on the Maxwell equation, the occurrences of fractured zones are studied through the galvanic method. The electrical and magnetic fields are first derived in the spatial domain. To simplify the calculations, the computational formulas of the electrical fields in the spatial domain are transformed into the wavenumber domain by the Fourier transform.
Benyu Su +4 more
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Mine Water and the Environment, 2020 Accurate prediction of the height of the water-conducting fracture zone (WCFZ) is very important for safe coal mining, water resource storage, and protecting the environment. The proportion coefficient of hard rock and the actual height of the top caving coal were defined to predict the height of the WCFZ more accurately.
Xiang He +3 more
+5 more sources
Development of overlying strata collapse and water-conducting fractured zone in shallow coal seams mining [PDF]
Shuiwen dizhi gongcheng dizhiShallow underground mining of coal seams has significant impacts on the overlying rock formations, not only exacerbating surface subsidence but also potentially leading to surface and groundwater loss, thereby affecting the development and safety of the ecological environment.
Hui SHANG +4 more
openaire +3 more sources
Advances in Civil Engineering, 2021 The overburden rock mining fissures are the main cause of coal spontaneous combustion, gas pooling, and mine water inrush caused by goaf air leakage.
Xiaoqiang Zhang +4 more
doaj +1 more source
A thermodynamically consistent derivation of a frictional-damage cohesive-zone model with different mode i and mode II fracture energies [PDF]
, 2015 The present paper deals with the derivation of an interface model characterized by macroscopic fracture energies which are different in modes I and II, the macroscopic fracture energy being the total energy dissipated per unit of fracture area.
Serpieri, R +3 more
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Physical simulation study on grouting water plugging of flexible isolation layer in coal seam mining
Scientific Reports, 2022 Deep coal seam mining often leads to water resource loss due to bedrock water entering the workings of the mine and is discharged adjacent to the mining area.
Ang Li +8 more
doaj +1 more source
Shock and Vibration, 2021 In order to determine the reasonable height of water-proof coal (rock) pillar when mining multiple coal seams under aquifer, this paper analyzes the expansion height of water-conducting fracture zone when coal seams mining.
Feng Wan +3 more
doaj +1 more source
, 2022 In order to extract gas accurately in Yue Nan coal mine and prevent gas over limit and gas accidents, a combination of theoretical analysis and numerical simulation was used to investigate the height of the overburden caving zone and fracture zone in the
Xiaozhen Dong +4 more
core +1 more source