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- W2358105199 abstract "In allusion to the damage zone of overlying strata and mining the left-over coal above the longwall goaf,through simplified plane model of mechanics,the damage zone of strata above the longwall goaf after coal mined was analytical analyzed.Overburden rock mass on the mined-out area were obviously divided into breakage caving zone,excavation-disturbed zone and nondestructive deformation zone according to the vertical change of their damage extent from high to low.The formula for determining the safty layer distance of the upward mining of the left-over coal above the longwall goaf was obtained.The safty layer distance of the upward mining on the left-over coal above the longwall goaf was calculated in Baijiazhuang Coal Mine of Xishan Coal Electricity Group Company." @default.
- W2358105199 created "2016-06-24" @default.
- W2358105199 creator A5013143104 @default.
- W2358105199 date "2009-01-01" @default.
- W2358105199 modified "2023-09-23" @default.
- W2358105199 title "Analysis on the damage zone of overlying strata and safety layer distance on the upward mining above the longwall goaf" @default.
- W2358105199 hasPublicationYear "2009" @default.
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