Uphole sealing method
A technology of drilling and grouting pipes, which is applied in the directions of earthwork drilling, sealing/isolation, gas discharge, etc. It can solve the problem of gas pressure losing its authenticity, unable to provide accurate data for coal seam outburst risk area division, and unable to block Coal-measure floor sandstone fissure water and other issues
Active Publication Date: 2012-07-04
HUAINAN MINING IND GRP
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Problems solved by technology
[0003] The existing hole sealing process for upward drilling usually adopts non-pressure grouting, so that the coal-measure floor sandstone fissure water cannot be sealed, causing the fissure water to enter the piezometric tube and act on the pressure gauge, so that the gas pressure measured by the pressure gauge is lost. Authenticity, cannot provide accurate data for the division of coal seam outburst risk areas
Coal mine engineering and technical personnel are also unable to take targeted measures to control coal seam gas
Method used
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Embodiment Construction
[0018] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0019] figure 1 It is a flow chart of the sealing method for upward drilling provided in Embodiment 1 of the present invention. Such as figure 1 As shown, the sealing method of upward drilling in this embodiment may specifically include:
[0020] Step 100, at the position where the piezometric pipe is pre-extended into the bottom plate of the p...
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Abstract
The invention provides an uphole sealing method, which includes: cotton yarns are wound at a pre-extension position on the piezometric pipe 1m-2m below a roof of a piezometric coal seam in an uphole, and at a pre-extension position on a first grouting pipe 1m-2m below the roof of the piezometric coal seam in the uphole and 0.2m-0.3m away from an upper opening of the first grouting pipe; a piezometric perforated pipe is connected to the front end of the piezometric pipe, and the piezometric pipe and the first grouting pipe are tripped in the uphole; grout is injected into the uphole through the first grouting pipe until grout return occurs; a second grouting pipe is inserted into an opening of the uphole, and the opening of the uphole is sealed; grout is injected into the uphole through the second grouting pipe until the uphole cannot receive grout no more; and the uphole is subjected to grout injection under pressure through the second grouting pipe. Using the uphole sealing method can effectively seal sandstone fracture water of the coal seam roof with the grout and prevent the fracture water from entering the piezometric pipe during pressure measurement.
Description
technical field [0001] The invention relates to the technical field of drilling and sealing of mines, in particular to a method for sealing upward drilling. Background technique [0002] In the process of measuring coal seam gas pressure in coal mines, it is often necessary to construct upward drilling. In order to accurately measure the pressure of the coal seam. It is necessary to seal the upward drilling first, and then install a pressure gauge at the opening of the upward drilling after sealing, and the pressure gauge is connected to the pressure measuring flower tube packaged in the hole and the upper end is in the coal seam through, so as to measure the pressure of the gas released from the coal seam. [0003] The existing hole sealing process for upward drilling usually adopts non-pressure grouting, so that the coal-measure floor sandstone fissure water cannot be sealed, causing the fissure water to enter the piezometric tube and act on the pressure gauge, so that t...
Claims
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Login to View More IPC IPC(8): E21B33/13E21B47/06E21F7/00
Inventor 刘结高李应辉李秀山李彬汪有清沈强程双礼王峻涛郑继兰
Owner HUAINAN MINING IND GRP