Analysis on the damage zone of overlying strata and safety layer distance on the upward mining above the longwall goaf

作者：Feng Guo Rui^*; Yan Yong Gan; Yang Shuang Suo; Zhang Bai Sheng; Zhai Ying Da; Kang Li Xun

来源：Journal of China Coal Society, 2009, 34(8): 1032-1036.

• Damage zone
• Overlying strata
• Safety layer distance
• The longwall goaf
• Upward mining

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.

• 出版日期2009
• 单位太原理工大学