会东铅锌矿露天地下联合开采方案的探讨

会东铅锌矿初步设计的露天地下联合开采方案，确定地下采矿从露天坑底１９８０ｍ 水平开始，用下向分层进路胶结充填法采矿，并逐步形成厚３６ｍ 的隔离柱，但该方案已不适应该矿的实际情况。本文讨论了５种调整方案，并认为地下首采区选择在露天坑底水平以外，能扩大露天采矿范围，减少隔离柱构筑费用，且露天开采和地下开采互不制约。

An Approach to the Scheme of Surface and Underground Combined Mining in Huidong Lead Zinc Mine

In the Surface and underground combined mining scheme of the primarg design in Huidong Lead Zinc Mine,it was decided to start underground mining at 1980m tevel under the open pit bottom by downward slice and drift mining with cemented filling and gradually form a 36m thick separation pillar,howerer this scheme was not suited to the actual situation of the mine already.This paper discussed five modified schemes and considered that the initial underground mining area selected outside the open pit bottom was able to expand open pit mining range,reduce the construction cost of separation pillar and eliminate interfernce between open mining and underground mining.