Experimental device and method for integrated prevention and control of complex dynamic disasters in coal mines
A technology of composite dynamic and experimental methods, applied in safety devices, mining equipment, earth-moving drilling, etc., can solve the problems of high ground stress, high gas pressure, poor water injection effect, etc., so as to reduce the impact tendency and reduce the gas content. , Improve the effect of water injection and drainage
Active Publication Date: 2021-04-30
LIAONING UNIVERSITY
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Problems solved by technology
[0004] The content of the present invention is to overcome the problem of poor water injection effect caused by high ground stress and high gas pressure in deep mining coal seams, and adopt a method for water injection and gas extraction in sections using the same borehole
Method used
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Embodiment 1
[0044] The perforated sleeve 9 with a hole sealer 18 refers to a plurality of continuous hole sealers with very good sealing on the outside of the sleeve, and the hole sealer is composed of an expansion material. The water injection pipe 16 and the gas collection pipe 15 in the perforated casing 9 are composed of two hard plastic pipes, which are nested together without interfering with each other. The gas collection pipe 15 is the inner pipe, and the water injection pipe 16 is the outer pipe. There is a nozzle every 5m And a hole sealer, the nozzle is provided with a valve controlled by the console, the nozzle is the water outlet, with a flow sensor nearby, and the data transmitted by the flow sensor 13 uses the console to control the water injection volume of each section. The outside is connected with the gas drainage pump 2 and the water pump 4 respectively. Utilize the drilling rig to insert the sleeve pipe with the hole sealer 18 into the water injection hole after drill...
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The experimental device and method for integrated prevention and control of coal mine complex dynamic disasters, using the same borehole for water injection and gas drainage in sections, reduces the impact tendency of coal body and displaces gas through water injection, and at the same time, gas drainage can reduce the gas pressure in coal body It can also increase the effect of coal seam water injection, and can solve the problem of difficult water injection in deep mining with high gas pressure and low permeability coal seam. The device has the advantages that water injection and extraction can be performed simultaneously, can be performed intermittently, can be reciprocated, and can be performed simultaneously, which greatly improves the effect of water injection in deep high-stress low-permeability coal seams, and reduces the risk of rock burst gas outburst compound dynamic disasters.
Description
technical field [0001] The invention relates to an experimental device and prevention and control method for coal seam water injection and gas drainage integrated prevention and control of combined dynamic disasters in coal mines, specifically about water injection and gas drainage in deep high-stress and low-permeability coal seams at the same time to prevent coal mine rockburst gas outburst compounding Device and method for dynamic disaster. Background technique [0002] With the deepening of coal mining activities, the stope conditions in the deep mining areas of coal mines will further deteriorate, and after deep mining, the coal seam presents high stress and high gas points, and rockburst gas outburst compound dynamic disasters occur frequently. In-depth research on the prevention and control of coal mine compound dynamic disasters is an urgent requirement for safe production. [0003] Coal seam water injection is to drill water injection holes in the mined coal seam, ...
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IPC IPC(8): E21F7/00
CPCE21F7/00
Inventor 徐连满路凯旋潘一山郝喆马柳秦志娇
Owner LIAONING UNIVERSITY