Method for preventing blast hole from freezing

Abstract

The invention discloses a method for preventing a blast hole from freezing. Based on the principle, after each blast hole is drilled, the blast hole is immediately subjected to full-closed treatment by using a closed barrel, so that an external water source and air cannot enter the blast hole. The general method comprises the following steps that firstly, a cylindrical closed barrel made of a rubber material, wherein the diameter is smaller than that of a blast hole; an inflation connector is installed at one end of a high-pressure-resistant high-strength hose with the diameter of 2 cm, a guide balance lead block is installed at the other end of the high-pressure-resistant high-strength hose, then the hose penetrates into the closed barrel and is fixed, and the end of the guide balance lead block is fixed to the bottom of the closed barrel; a damping rubber ring is prepared, and the damping rubber ring is arranged at the position, above the guide balance lead block, of the closed barrel in a sleeving mode; the blast hole is cleaned after being drilled; then, the closed barrel is led into the blast hole, uniform-speed inflation is conducted, the closed barrel expands to reach a holeopening, and the closed barrel is clamped through calipers; and a plastic sand bag is used for pressing the hole opening, and then full-closed treatment of the blast hole is completed. According to the method, a water source causing blast hole freezing can be effectively blocked, and the technical problem of blast hole freezing in blasting construction in plateau alpine regions is fundamentally solved.

Description

technical field [0001] The invention belongs to the technical field of engineering blasting construction, and in particular mainly relates to a method for preventing freezing of blastholes during blasting construction in plateau alpine regions. Background technique [0002] my country's permafrost area accounts for 22.3% of the country's land area, ranking third in the world, and the area of ​​high-altitude permafrost ranks the largest in the world. According to national policies, the focus of my country's construction is gradually shifting to the west. Seasonal frozen soil and permafrost in vast areas such as Gansu, Qing, Xin, Tibet, and Ningxia will gradually become the focus of construction. Many projects, such as excavation of housing and road foundations, development of mineral resources, laying of oilfield pipelines, water conservancy and hydropower projects, and construction of military projects, will face problems such as freezing, lack of oxygen, and environmental p...

AI Technical Summary

Problems solved by technology

However, the above measures are still difficult to fundamentally solve the problem: method 1 still has frozen ice at the orifice; method 2 is a passive construction method, which does not solve the problem of frozen ice and limits the progress of the project; method 3 is to remove the frozen ice method, but it will increase the cost of drilling; method 4 is also a method for removing frozen ice, but it will greatly increase the labor load of workers; method 5 is also a passive construction method, and also does not fundamentally solve the problem of blast hole freezing; method 6 It is difficult to implement a large number of frozen ice blast holes, and it will bring new drainage problems

It can be seen that the above method cannot fundamentally and effectively solve the technical problem of blast hole freezing in plateau alpine regions

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