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: 2008-05-28
马芹永
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

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

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Embodiment Construction

[0024] The present invention will be described in detail below through engineering embodiments in conjunction with the accompanying drawings.

[0025] Project Overview

[0026] A coal mine is developed for a vertical shaft. The net diameter of the main shaft is 4.5m. The shaft passes through the Quaternary topsoil layer with a thickness of 289m. The topsoil section is constructed by freezing method, and the freezing depth is 320m. The diameter of the upper excavation barren is 6.1m. When the shaft is excavated to a depth of 110m, the entire section of the shaft is frozen solid. Since the depth of the well is between 100m and 150m, it is mainly a white-gray calcareous clay layer, which has a high strength after being frozen. 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. In order to reduce the labor intensity of workers and speed up the excavation, ...

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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 well-sinking technology with deep topsoil freezing method, in particular to a process method for artificial frozen soil controlled blasting in construction with deep topsoil freezing method. Background technique [0002] In 1883, German engineer F.H.Poetsch used the freezing method to dig a shaft with a depth of 103m in the Albared coal mine in Germany, and obtained a patent for the freezing method. After that, this technology spread to many countries in the world. In 1955, my country used the freezing method to excavate the Kailuan Lin Xifeng Well. The net diameter of the wellbore was 5m, and the freezing depth was 105m. In the past 50 years, fruitful research results have been achieved, and a total of more than 430 freezing projects have been built, including the Pansandong Wind Shaft in Huainan with a maximum freezing depth of 415m in the 1980s and the Chensilou Subsidiary in the Yongxia Mining Area of ​​Henan in the 1990s...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F42D3/00F42D1/00
Inventor 马芹永
Owner 马芹永
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