A Gas Pressure Measurement Method for Quick Sealing of Horizontal Boreholes
A technology of horizontal drilling and gas pressure, which is applied in the direction of gas discharge, measurement, earthwork drilling and mining, etc., and can solve the problems of long time-consuming sealing of holes by packing method, complicated and expensive pressure measuring device, and insufficient sealing of holes, etc.
Active Publication Date: 2021-05-28
CHINA UNIV OF MINING & TECH
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Problems solved by technology
[0003] Technical problem: The purpose of this invention is to overcome the defects of the existing pressure measurement technology, such as strict requirements on the opening position, complicated and expensive pressure measurement devices, long time-consuming sealing of holes by filling method, and unsatisfactory sealing of holes easily caused by parallel drilling, and provide a A simple and reliable gas pressure measurement method suitable for rapid sealing of horizontal drilling in coal roadways
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Embodiment Construction
[0019] The present invention will be further described below in conjunction with the embodiment in the accompanying drawings:
[0020] like figure 1 As shown, the gas pressure measurement method for fast sealing of horizontal boreholes of the present invention includes using the pressure measuring gas formed after the expansion and solidification of liquid A and liquid B in the waterproof plugging AB plastic bag in the pressure measuring borehole 4. chamber plugging section 2 and orifice plugging section 6, and the pressure measuring chamber section 1 and grouting plugging section separated by the pressure measuring chamber plugging section 2 and the orifice plugging section 6 to separate the pressure measuring borehole 4 3 and the orifice section 7, the pressure measuring borehole 4 is provided with a pressure measuring pipe 15, a grout return pipe 5 and a grouting pipe 13, and the pressure measuring pipe 15 passes through the pressure measuring chamber 1 outwards in sequence...
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The invention relates to a method for measuring gas pressure of quick sealing of horizontal drilling, which is especially suitable for measuring the gas pressure of quick sealing of horizontal drilling in this coal seam. Using the piezometric tube pressure measurement method, fix the AB glue on the surface of the piezometer tube, expand and solidify after the colloid is mixed, and divide the borehole into a piezometer air chamber section, a grouting plugging section and an orifice section; the front end of the piezometer tube is a screen The pipe is fixed in the pressure measuring chamber, and passes through the sealing section of the pressure measuring chamber, the grouting sealing section and the orifice sealing section in sequence, and is connected with the pressure gauge at the orifice; the pressure measuring tube in the grouting sealing section The water-absorbing bags are fixed on the surface in turn, and the bags are processed by wrapping polymer water-absorbing materials with water-soluble film. Absorb the moisture of the grout, and as the grouting process proceeds, the water-absorbing material is stirred, and the grout accelerates to solidify, which greatly saves the time for grouting and plugging, and at the same time avoids the crescent-shaped channel that appears in the parallel drilling.
Description
technical field [0001] The invention relates to a method for fast hole sealing and pressure measurement, in particular to a method for measuring gas pressure suitable for fast hole sealing of horizontal drilling in the coal seam, and belongs to the technical field of coal mining. Background technique [0002] At present, the method of measuring coal seam gas pressure in China is usually to drill a hole into the coal seam from Shimen or surrounding rock drilling site, put a pressure measuring device in the hole, seal the hole, and measure it directly with a pressure gauge, according to the hole sealing method Divided into sealer method and packing method. Commonly used hole sealers include capsule, apron, capsule-mucus, apron-mucus, etc., which are suitable for pressure measurement with complete and dense perforated rock drilling conditions. The location of the hole and the integrity of the borehole have a great influence, and it is not suitable for the measurement of gas pr...
Claims
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IPC IPC(8): E21B33/13E21F7/00E21B47/06
CPCE21B33/13E21B47/06E21F7/00
Inventor 杨胜强张帅宋万新汤宗情刘梦晨王晓宁蔡佳文张东鹏宋亚伟胡新成
Owner CHINA UNIV OF MINING & TECH