| The control of blasting vibration disaster has been the important research subject on the region of engineering blasting and it is difficult to control its disaster effectively. Towards to the pits using the back filling method, the controlling redients technique of backfill of the inter-pillar stopes has become the keypoint of inter-pillar stoping. To effectively control the caving of backfill spacer pillar while blasting could reduce the safety accidents and dilution rate of mining stopes if the mining stopes is unstable, and boost the efficiency of mining stopes stoping to a large extent. Against the issue, the technical research of influence and control of blasting seismic wave on backfill is proposed. The influence of blasting seismic wave on backfill was researched combined the ways of laboratory test and on-site test of Fankou,dongguashan, so the reasonable stoping order and control technique of furnace hole is presented. The following points are studied on the basis of the above research work:(1) Analyze the influence of blasting seismic wave on backfill about distance effects and different dosages effects,the influence of blasting seismic wave on the different days(3d,7d,28d)'s backfill is analyzed to draw the conclusion of seasonable stoping order and the seasonable maintenance time of backfills while the backstopping of spacer pillar by experiments.(2) Analyze the influence of blasting seismic wave on backfill is analyzed under the eccentric decouple charge blasting., which provides the theoretical evidence for the on-site test designation.(3) The time-frequency characteristics of blasting vibration in the pit are analyzed and the characteristic parameters of different eccentric decouple charge blasting vibration are studied.(4) ANSYS LS/DYNA is used to simulate the influence of furnace hole blasting on backfill to draw the conclusion of the optimal hole distance of the backfill and chamber charge structure.(5)The method of dynamic stress ratio combined with the detected data of on-site blasting vibration is used to analyze the influence of blasting seismic wave on underground engineering so as to get the reasonable stoping order of inter-pillar stopes and dynamic backfill safety criterion.
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