Device with fully-closed blast hole

Abstract

The invention discloses a device with a fully-closed blast hole. The device consists of a closed barrel, an inflation hose, a damper, a guide balance lead block, an inflation joint, a magnetic attraction joint, a safety rope, a tightening bag and a sealing sand bag. In use, the device is straightly placed into a blast hole to be closed, then constant-speed inflation is conducted, so that inflationis stopped after volume of the closed barrel is expanded to exceed the opening of the blast hole by 5-10 cm; the closed barrel is clamped through calipers, then the sealing sand bag is pressed at theopening of the blast hole, so that full-closing treatment of the blast hole is completed. The closed barrel is tightly attached to the hole opening, the hole bottom and the whole peripheral wall of the blast hole, so that external surface water, rock mass crack water, rock mass seepage water and other water sources and air cannot enter the blast hole, and thus, ice cannot be frozen naturally whenno water exists. And when the blast hole is filled with the powder, the sealing sand bag is removed, and the closed barrel is taken out for powder filling operation. The device can perform all-aroundclosing on the blast hole, effectively blocks a water source that causes blast hole freezing, so that 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 equipment for sealing blastholes and preventing blastholes from freezing 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 o...

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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