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Technology method of artificial frozen soil control blasting by deep surface forzen method

A technology of artificial frozen soil and controlled blasting, applied in blasting and other directions, can solve the problems of high labor intensity of workers, difficulty in manual excavation, and difficulty in excavation, and achieve the effect of reducing unit consumption of explosives, reducing labor intensity of workers, and being beneficial to safety.

Inactive Publication Date: 2005-01-05
马芹永
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Problems solved by technology

Manual excavation of the working face is very difficult, the footage of a shift is 200mm, the labor intensity of the workers is very high, and the efficiency is extremely low
It can be seen that the freezing of the frozen section of the wellbore reduces the deformation of the frozen wall, improves the strength of the frozen soil and the stability of the frozen wall, and ensures the safety of the frozen pipe. here comes the difficulty
From the domestic and foreign novelty search reports of the national first-level scientific and technological novelty search consulting unit, we know that no one at home and abroad has systematically studied the problem of controlled blasting in artificial frozen soil

Method used

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  • Technology method of artificial frozen soil control blasting by deep surface forzen method
  • Technology method of artificial frozen soil control blasting by deep surface forzen method
  • Technology method of artificial frozen soil control blasting by deep surface forzen method

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Embodiment Construction

[0024] Hereinafter, the present invention will be described in detail through engineering embodiments and the accompanying drawings.

[0025] Project Overview

[0026] A coal mine is a vertical shaft development. The net diameter of the main shaft is 4.5m. The shaft passes through the Quaternary surface soil layer with a thickness of 289m. The surface soil section is constructed by the freezing method with a freezing depth of 320m. The upper excavation wasteland has a diameter of 6.1m. When the shaft is driven to a depth of 110m, the full section of the shaft is frozen and solid. Because of the white-gray calcareous clay layer between the depth of 100 and 150m, the strength of this layer of soil is very high after freezing. At that time, the average temperature of the well side was -9°C, and there was very little deformation of the well side. It is very difficult to excavate the working face manually. The footage of a shift is 200mm, the labor intensity of the workers is very high...

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Abstract

The invention relates to a process method for manual frozen soil control blast with deep and thick surface freezing method; one or several circles of slot carving apertures are arranged in the centre of the cylinder which is frozen; a circle of side apertures is arranged on the excavation wild path, the around apertures are distributed evenly, at least one circle of assistant apertures are arranged between the peripheral apertures and the slot apertures; the slot aperture uses powder filling inner micro difference blast divided into upper and subjacent two parts.

Description

Technical field [0001] The invention relates to a deep and thick topsoil freezing method for sinking technology, specifically, a deep thick topsoil freezing method to construct artificial frozen soil controlled blasting. Background technique [0002] In 1883, the German engineer F.H. Poetsch used the freezing method to excavate a shaft with a depth of 103m in the Albarid coal mine in Germany, and obtained the patent for the freezing method. After that, the technology spread to many countries in the world. In 1955, my country used the freezing method to excavate the Kailuanlin West ventilation shaft with a net diameter of 5m and a freezing depth of 105m. After that, Chinese scientists and technicians began to study the freezing method of sinking technology. In the past 50 years, fruitful research results have been achieved. A total of more than 430 freezing projects have been built, including the Huainan Pansandong air shaft with a maximum freezing depth of 415m in the 1980s and C...

Claims

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Application Information

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IPC IPC(8): F42D1/00F42D3/00
Inventor 马芹永
Owner 马芹永
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