雨林地区米拉多铜矿排土场碾压堆石坝施工技术

随着社会经济的发展，如何合理、有序、经济、环保地处理弃土弃渣已成为强降雨地区土石方项目亟需解决的问题。而对于雨林地区土石方工程往往需要布设大面积的排土场进行弃土弃渣，弃土弃渣存在“量大、集中”等特点。为保证弃土有效容量，排土场往往设置在沟谷中，雨林地区排土场如何保证地基处理、渗流层施工、分层填筑碾压是坝体施工质量控制的关键所在。以厄瓜多尔米拉多铜矿采矿工业场地工程项目为例，该项目存在土石方开挖工程量大，项目面临雨季长、高雨频等突出气候特点。项目排土场设计为碾压堆石坝，坝体整体高度84.8 m，坝体填筑石方达27.8万m3。简要介绍了该工程1 095 m排土场坝体施工的特点和难点，叙述坝体施工过程中采取的主要关键技术，为类似的工程施工提供借鉴。

Construction Technology of Roller Compacted Rockfill Dam in Waste Dump of Mirador Copper Mine in Rainforest Area

With the development of social economy,how to deal with the waste soil and slag reasonably,orderly,economically and environmentally has become an urgent problem to be solved in the earth rock project in the heavy rainfall area.However,for the earth and stone works in the rainforest area,a large area of waste dump is often required to be set up for the disposal of soil and slag,which has the characteristics of "large quantity and concentration".In order to ensure the effective capacity of the waste soil,the waste dump is often set in the valley.How to ensure the foundation treatment,see page layer construction,layered filling and rolling is the key to the quality control of the dam construction in the rainforest area.Taking the mining industrial site Project of Mirador Copper Mine in Ecuador as an example,the project has a large amount of earth rock excavation work,and the project faces such outstanding climatic characteristics as long rainy season and high frequency of rain.The waste dump of the project is designed as a roller compacted rockfill dam,with an overall height of 84.8 m and a rockwork volume of 278 000 m3.This paper briefly introduces the characteristics and difficulties of the dam construction of 1 095 m waste dump,and describes the main key technologies adopted in the dam construction process to provide reference for similar engineering construction.