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| Research on controllable shock wave anti-reflection technology in Huoerxinhe Coal Mine |
| Xu Qi |
| Shanxi Huoerxinhe Coal Industry Co., Ltd., Changzhi 046002, China |
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Abstract In order to increase the permeability of coal seam and improve the efficiency of gas drainage in coal seam, this paper takes the 2103 track crossheading of No.3 coal seam in Huoerxinhe Coal Mine as the research object, and uses the controllable shock wave antireflection technology to study the antireflection test of coal seam. A total of 7 antireflection boreholes were set up in the influence area of conventional boreholes in the mining area and the non-mining area without any mining influence. The test results show that the anti-reflection operation improves the gas extraction flow of boreholes, and the anti-reflection process parameters of No.2 coal seam are preliminarily optimized. The extraction effect is the best under the process parameters of single-point anti-reflection for 6 times. The extraction effect of the observation holes arranged at different distances from the antireflection drilling hole verifies the effective antireflection radius of the controllable shock wave ; through the statistics of the extraction data, both the daily average extraction amount and the change trend of the extraction amount of the anti-reflection hole, or the daily average extraction amount and the change trend of the extraction amount of the observation hole, all prove the effectiveness of the controllable shock wave anti-reflection coal seam, and ensure the normal production continuation of the Huoerxinhe coal mine.
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