普朗铜矿井下冰碛补给型泥石流启动机理试验研究

强降雨是诱发普朗铜矿井下冰碛补给型泥石流灾害的重要因素,以现场调查和室内模拟试验为研究手段,对普朗铜矿不同降雨强度条件下的井下冰碛补给型泥石流的启动机理进行研究。研究结果表明:1)强降雨为井下冰碛补给型泥石流形成提供水动力条件;2)纯矿石放矿过程中,地表冰碛物不会在矿石层中形成通道,在不同降雨强度下不会有井下泥石流的形成;3)地表冰碛物在矿石层中形成通道是井下泥石流形成的前提,有地表冰碛物放出时,室内降雨强度0.563mL/min时会形成具有较大能量的泥石流,0.293mL/min时会有泥石流发生的潜能,0.186mL/min时不会形成井下泥石流。研究对井下泥石流启动机理探究具有一定借鉴作用,同时对矿山泥石流灾害的预防、治理和管理措施具有指导意义。

Experimental Study on the Start-up Mechanism ofMoraine-Supplied Debris Flow in the Prang Copper Mine

Heavy rainfall is an important factor inducing the moraine-supply-type debris flow disaster in the underground of Pulang copper mine. In this paper, field investigations and laboratory simulation tests are used as research methods to study the start-up mechanism of underground moraine-supply debris flow at different rainfall intensity conditions in the Pulang copper mine. The results show that: (1) heavy rainfall provides hydrodynamic conditions for the formation of downhole moraine-supply debris flow; (2) during the process of pure ore mining, surface moraine does not form a channel in the ore layer, under different rainfall intensities There will be no formation of downhole debris flow; (3) The formation of channels by surface morain in the ore layer is a prerequisite for the formation of downhole debris flow. When the surface moraine is released, a large energy will be formed when the rainfall intensity is 0.563ml / min Debris flow, there is potential for debris flow to occur at rainfall intensity of 0.293ml / min, and there will be no downhole debris flow at rainfall intensity of 0.186ml / min. This paper provides a certain reference for the exploration of the mechanism of underground debris flow initiation, and also provides guidance for prevention, management and management measures of mine debris flow.