具有深凹特征的改进挂帮矿诱导冒落开采方法

大孤山铁矿为大型深凹露天铁矿山，在露天转地下过渡期中，采用诱导冒落法开采挂帮矿的新型露天转地下过渡模式.对大孤山铁矿现存挂帮矿进行三维建模分析，依据过渡模式的露天地下协同开采的安全要求，选择南帮挂帮矿作为过渡期第一阶段露天地下协同开采区域，通过采用合理的回采顺序控制边坡上塌陷坑范围和塌陷坑容积，使滑移体全部滑入塌陷坑.开采东帮挂帮矿为露天转地下第二阶段，利用露天原有运输系统迅速提高地下产能，并采用合理方式控制东帮边坡滑移岩体.最后采用该方法对大孤山铁矿露天转地下进行方案设计和验证.

Improved Induced Caving Mining Method for Hanging Wall Ore with Deep Concave Features

The Dagushan iron mine is a large deep concave open-pit iron mine. During the transitional period from open-pit to underground mining， a new underground transition mode of improved induced caving mining for hanging wall ore was adopted. The 3D modeling of the existing hanging wall ore was carried out in Dagushan mine. Based on the the safety requirements of open-pit and underground cooperative mining in transitional mode， the south-hanging wall ore was selected as the open-pit and underground cooperative mining area during the first phase of the transitional period. By adopting a reasonable sequence of extraction， the range and volume of collapse pit at the slope were controlled， so that the slip body slides into the collapse pit. In the second stage of the transition from open-pit to underground mining， the mining of the east hanging wall ore was used to rapidly improve the underground mining capacity and to control the sliding rock mass of the east side slope in a reasonable manner. Finally， it was used to design and verify the mining method of transition from open-pit to underground in Dagushan iron ore mine.