Slag type debris flow formation mechanism based prevention method

Abstract

The invention discloses a slag type debris flow formation mechanism based prevention method. The prevention method comprises the steps of distinguishing a slag type debris flow hidden danger gully; investigating a debris flow gully material source; investigating gully geomorphic parameters and hydrogeological parameters; conducting a dredging project on a floodwater drawing-off passage; and conducting a slag stack blocking project. According to the method, a slag blocking measure which is high in water permeability is used, heavy rain and mountain torrents pass through a waste rock slag stack quickly, slag is prevented from entering the floodwater drawing-off passage to become the material source of debris flows, and prevention of formation of 'breaking blocking type debris flows' and reduction of disasters and losses can be achieved; and simultaneously, disaster effects of debris flows, which may be amplified due to dam breaking caused by the fact that debris flow gravity dams are built to accumulate debris flows, barrier dams block heavy debris flows and let small debris flows go and the like are reduced. Besides, the method is based on a prevention idea which gives first place to dredging, and light engineering measures such as galvanized wire boxes with the high water permeability are used, so that engineering costs of building of barrier dams and drainage channels are reduced, and the method has good practical application and popularization prospects.

Description

technical field [0001] The invention belongs to the field of mud-rock flow prevention and control, and in particular relates to a prevention and control method based on the formation mechanism of slag-type mud-rock flow. Background technique [0002] Due to the steep topography, collapse and landslide deposits and residual slope deposits in mountainous areas, debris flow geological disasters are often formed under the action of heavy rain. Mine debris flow is an artificial debris flow caused by unreasonable dumping of mining waste rock and slag during the development of mineral resources in mountainous areas. While the development of mineral resources in mountainous areas promotes economic and social development, in the process of building roads, cutting slopes and leveling industrial sites, open-pit stripping and underground mining, waste rocks and slag are accumulated on hillsides and valleys, which greatly increases the formation of debris flows. The source of solid matt...

AI Technical Summary

Problems solved by technology

However, for the waste rock and slag piles with coarse particles as the main part, because of its high voids and good water permeability, such as following the prevention and control concept and engineering measures, the prevention and control is not targeted and the cost of treatment is high. The gravity dam built to block the ditch accumulates slag for a long time, blocking the collapse and amplifying the disaster effect of debris flow

[0010] At present, there is no new technology and method for the prevention and control of this slag-type debris flow formation mode at home and abroad.

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