卸压支护技术在谦比西铜矿的应用

赞比亚谦比西铜矿矿岩破碎，地压活动频繁，生产中沿脉凿岩巷道破坏严重，严重影响着矿体安全正常的回采。通过现场调查分析认为，谦比西铜矿主要采动压力是垂直压力，并且集中作用于层、节理发育的矿体与近矿围岩，从而引起巷道及采场的大量垮冒。根据这一特点，谦比西铜矿实施了卸压开采和锚杆支护的综合开采技术，有效地控制了地压，提高了采准工程的利用率，顺利地实现了矿体的安全、高效、经济回采。

Application of Depressurized Support Technology in Chambishi Copper Mine

In Chambishi Copper Mine in Zambia, fractured rockmass and frequent ground pressure activity seriously damaged the along-dike laneway, thus greatly affecting the safe and normal extraction of orebodies.It was concluded through the site survey and analysis that the Chambishi's mining dynamic pressure was a vertical one and concentrated on bedding and joint-developed orebodies and surrounding rock, thus leading to a great amount of caving of laneways and stopes.In view of this, the mine adopted depressurized mining and bolting support, which effectively controlled the ground pressure, improved the utilization rate of preparation engineering and smoothly realized a safe, efficient and economic extraction of orebodies.