Comprehensive anti-burst construction method for rock cross-cut outburst coal seams
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A construction method and a technology of outburst coal seams, which are applied in earthwork drilling, gas discharge, safety devices, etc., can solve problems such as outburst and undiscovered coal and gas, and achieve safety assurance, good advance support effect, and improved safety Effect
Active Publication Date: 2019-01-15
LIAONING TECHNICAL UNIVERSITY
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Therefore, so far, no reasonable and effective method has been found to prevent coal and gas outburst during the coal mining process in Shimen.
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[0058] figure 1 As shown, a comprehensive outburst prevention construction method for exposing outburst coal seams in Shimen, including advanced geological drilling, regional gas pre-drainage, regional pre-drainage effect inspection, local gas drainage, local drainage effect inspection, grouting reinforcement and exposing coal seams .
[0059] The implementation process of the present invention is illustrated below in conjunction with accompanying drawing:
[0060] The project adopts a comprehensive outburst prevention construction method of exposing the outburst coal seam at the Shimen. The specific construction steps are as follows:
[0061] (1) Advanced geological drilling
[0062] When the vertical distance between Shimen 1 head-on and coal seam 2 is 15m, stop the excavation, and use ZYJ-420 / 200 type frame-pillar hydraulic rotary drilling rig to construct advanced geological drilling holes on the head-on section of Shimen (1), and the number of advanced geological drilli...
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Abstract
The invention discloses a comprehensive anti-burst construction method for a rock cross-cut outburst coal seam, and belongs to the field of rock cross-cut coal uncovering in the underground coal mineof mining engineering. The method comprises the steps of 1), construction advanced geological drilling to determine coal seam information; 2) advanced gas pre-draining of regional gas; 3) on-site inspection of gas pre-pumping effect, after meeting the requirements, stopping and continuing cross drifting; 4) when the vertical distance between the cross-cut working surface and the coal seam is 4m, arranging a skeleton drilling hole, installing a steel pipe for protecting the hole, and then sealing the hole with cement mortar to continuously extract the gas in the coal seam; 5) inspection of partial gas-pumping effect, and stopping the local gas-pumping when the requirements are met; 6) grouting reinforcement; and 7) exposing the coal seam. The method is based on a conventional gas pre-pumping and anti-burst measures, and a traditional metal skeleton anti-burst technology is improved. The method is a comprehensive anti-burst construction method for the rock cross-cut outburst coal seam with gas pre-extraction, coal body solidification and advanced support functions.
Description
technical field [0001] The invention relates to a comprehensive outburst prevention construction method for uncovering outburst coal seams at stone gates, and belongs to the related technical field of mining engineering coal mine underground stone gates for uncovering coal. Background technique [0002] Coal and gas outburst is a natural disaster in coal mines, which seriously threatens the production safety of coal mines. Since the world's first coal and gas outburst accident occurred on March 22, 1834, in the Issac Coal Mine of Roualy Coalfield, France, the countries that have experienced coal and gas outbursts include France, the former Soviet Union, Poland, and Japan. , Hungary, Belgium, Canada, Australia, the Czech Republic, Bulgaria, the United States, the United Kingdom, Turkey, Germany, the Netherlands, India, Romania, Yugoslavia and China and other countries and regions. [0003] According to historical records, my country's first coal and gas outburst occurred on ...
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