Integrated treatment method of hidden water guiding channel in vertical well wellbore frozen hole

Abstract

The invention discloses an integrated treatment method of a hidden water guiding channel in a vertical well wellbore frozen hole. The method comprises the steps of carrying out the evaluation work of frozen hole closure quality, analyzing the scope and risk degree of a frozen hole 'annular space' hidden disaster channel; researching systematically lithological assemblage characteristics in the 'annular space' hidden water guiding channel sections, and determining the grouting governance interval; exploring the 'annular space' of the frozen hole and precisely positioning the grouting governance area; designing an engineering scheme and dynamically optimizing the engineering scheme; designing and constructing a grouting construction platform; dynamically optimizing the hidden water guiding channel integrated treatment scheme and controlling the construction in the whole process; comprehensively evaluating the grouting effect and implementing the local replenishment of the grouting and the like. After the implementation of the method, through the 'annular space' in the mine wellbore frozen hole being blocked off effectively, therefore the problems that groundwater in different aquifers takes the 'annular space' as the channel to make the hydraulic connections, thus the water inflow volume in the working surface is increased; and the safety potential of coal resource exploitation and drainage cost are increased are solved.

Description

technical field [0001] The invention relates to a method for detecting and grouting a water-conducting channel on the side wall of a freezing hole in the construction of a vertical shaft freezing method, and belongs to the field of mine safety construction and the grouting control of the water-conducting channel behind the shaft wall. Background technique [0002] Mine shaft construction in the western region has the characteristics of large diameter, shallow alluvium, and many aquifers, and the aquifers are mostly porous and fissured aquifers, which make it difficult to spread grout and have poor pre-grouting effects. Therefore, the freezing method is often used for shaft construction. The freezing method is to drill a certain number of freezing holes around the wellbore to be excavated before the wellbore is excavated. A freezer is installed in the hole. The low-temperature brine flows in the freezer to absorb the heat of the surrounding strata, and the loose, Frozen cylin...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the "annular space" between the wall of the freezing hole and the freezing pipe may lead to the aquifer in the formation during the construction process of the shaft shaft freezing method, which may bring danger to the safe mining of coal mines. It provides a mine shaft shaft freezing hole The comprehensive grouting treatment method for concealed water inrush channels, after the implementation of this construction method, effectively seals the "annular space" in the frozen hole of the mine shaft, and solves the hydraulic connection between different aquifers through the "annular space" as the channel. This will increase the amount of water inflow at the working face, increasing the safety hazards of coal mining and the problems of drainage costs

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