A Construction Method for Excavating Vertical Shafts by Ordinary Method in Very Thick Bedrock Aquifer

Abstract

The invention relates to a construction method for common-method grooving and vertical shaft, and belongs to the technical field of coal mine construction, and particularly relates to the construction method for common-method grooving and vertical shaft in an aquifer of great thickness bed rock. According to the construction method for common-method grooving and vertical shaft in the aquifer of great thickness bed rock, on the condition of having an underground drainage system, drainage drilling holes with large diameters are constructed inside the shaft firstly, suitable screen pipes are tripped and drainage holes are formed; underworkings and the drainage holes are connected in a butt joint mode, advanced drainage is conducted on the aquifer, and the underground drainage system is used for draining water; and a common method is adopted to construct during construction of the shaft, and meanwhile the screen pipe protective measures are adopted to protect the drainage holes. According to the construction method for common-method grooving and vertical shaft, the understanding that a freezing method must be adopted when the shaft penetrates through the aquifer of the great thickness rich water rock with a thickness of more than 300 m is broken, the construction cost is lowered, the engineering period is shortened, and meanwhile, quality of shaft construction is well ensured.

Description

technical field [0001] The invention relates to a construction method for excavating shafts, which belongs to the technical field of coal mine construction, and in particular to a construction method for excavating shafts by common methods in extremely thick bedrock aquifers. Background technique [0002] Currently, commonly used wellbore construction methods are divided into general methods and special methods. General methods include common method and grouting method; special methods include freezing method, caisson method, drilling method, curtain method and well point method, etc. [0003] Generally speaking, when the wellbore is deep and needs to pass through the extremely thick bedrock aquifer with strong water-richness, it is difficult to solve the problem of water prevention and control during the construction process of the common method and the drainage and decompression method, so the wellbore freezing method or Semi-freezing construction. [0004] The freezing m...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a water prevention and control method that can be constructed by using the common method of wellbore construction in order to solve the problem of passing through a thick aquifer with good water-rich bedrock in the process of excavating a vertical shaft. , the construction process is simple, the construction period is short, and the cost is low, which effectively solves the problem that the wellbore excavation using the common method in the thick bedrock aquifer is greatly affected by water damage, high cost, and long construction period, and the freezing method must be used for construction.

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