Development of Damage Criteria for Underground Mine Structures Subjected to Blast Vibration from Neighbouring Surface Mine
Blasting in a surface mine may cause ground vibration in neighbouring underground mine workings affecting their structural stability and resulting in loss of coal production.The effects of surface blasting on adjacent underground workings have been studied using peak particle velocity (PPV) measured at various locations in an underground Bord and Pillar mine.Predictor equations of PPVhave been developed based on distance D from the source of blasting and charge (explosive quantity) per delay Q.This study finds that depending on the number and composition of rock strata through which stress waves are transmitted from the surface to underground,Q0.35 factors may be appropriate for estimating the scaled distance,which is considered as a measure of PPV.Further a new approach is proposed to classify damage of underground structures into three groups using the concept of Blast Damage Factor and linear discriminant functions.Site-specific charts between charge weight and distance have been developed so that blasting at a surface mine can be conducted without causing damage to the adjacent underground mine.
surface blasting peak particle velocity predictor equation blast damage factor
A.K.Jha D.Deb
Blasting Cell,CMPDI,Ranchi,India Department of Mining Engineering,IIT Kharagpur,Kharagpur,India
国际会议
The 4th Asian-Pacific Symposium on Blasting Techniques(第四届亚洲太平洋地区爆破技术研讨会)
深圳
英文
481-489
2014-11-01（万方平台首次上网日期，不代表论文的发表时间）