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| Research on pressure relief and permeability improvement mechanism and gas extraction technology of hard coal seam cutting |
| Guo Silong 1, Zhang Jiale 2 |
| 1. Shanxi Lanhua Technology Entrepreneurship Co., Ltd., Bofang Coal Mine, Jincheng 048026, China; 2. Jincheng Mei 'an Mining Technology Service Co., Ltd., Jincheng 048026, China |
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Abstract Aiming at the problem of low efficiency of conventional extraction caused by high adsorption, low permeability and difficult to break coal in high gas and hard coal seam, the 3306 working face of Bofang Coal Mine is taken as the research object, and the coal physical property test, mechanical experiment, FLAC3D numerical simulation and field test are combined to study the synergistic anti-reflection mechanism and extraction technology of cutting pressure relief. The numerical simulation reveals the stress evolution law of ' radial pressure relief-tangential stress concentration-crack development '.Improving the unloading rate can significantly improve the pressure relief effect. The field test shows that the technology can increase the permeability of the coal seam by 106.2 times, increase the gas extraction efficiency by 2.1 times, and reduce the residual gas content to a safe value, which provides technical support for gas control in similar coal seams.
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| [ 1 ] 蓝 航,陈东科,毛德兵. 我国煤矿深部开采现状及灾害防治分析[ J ]. 煤炭科学技术,2016,44( 1 ):39 - 46.
[ 2 ] 杨继东,孙矩正. 平煤十三矿软岩保护层开采卸压增透技术研究及工程实践[ J ]. 能源与节能,2025( 6 ):320 - 322.
[ 3 ] 陈立伟. 保护层开采工作面卸压瓦斯治理技术研究[ J ]. 能源与节能,2025( 4 ):102 - 104.
[ 4 ] 段云飞. 高地应力碎软煤层水力卸压增透技术研究[ J ]. 陕西煤炭,2025,44( 6 ):129 - 134.
[ 5 ] 谢 俊,朱 健,胡国忠. 突出煤层顺层钻孔机械造穴卸压增透实验研究[ J ]. 矿业研究与开发,2025,45( 5 ):123 - 131.
[ 6 ] 熊俊杰,杨程涛,武腾飞. 基于多场耦合数学模型的机械造穴数值模拟研究[ J ]. 煤炭技术,2024,43( 4 ):213 - 219.
[ 7 ] 王亚雄. 底抽巷穿层钻孔机械造穴高效抽采瓦斯实验研究[ D ]. 徐州:中国矿业大学,2022.
[ 8 ] 刘 厅,翟 成,童校长,等. 强突煤层地面丛式井造穴卸压辅助石门揭煤技术[ J ]. 煤炭科学技术,2025,53( 5 ):144 - 157.
[ 9 ] 王 君. 山脚树矿机械造穴增透技术的应用研究[ J ]. 煤炭科技,2025,46( 1 ):110 - 114.
[ 10 ] 王海龙. 低渗透煤层机械造穴增透注水防尘技术研究[ J ]. 山西煤炭,2023,43( 2 ):24 - 29.
[ 11 ] 任 杰. 低渗透煤层水力造穴卸压增透瓦斯抽采技术研究与应用[ J ]. 能源技术与管理,2025,50( 2 ):39 - 41,50.
[ 12 ] 童校长,文 虎,徐鹤翔,等. 地面井掏煤造穴卸压增透技术及工程应用[ J ]. 西安科技大学学报,2025,45( 1 ):61 - 73.
[ 13 ] 丁国峰,吕振福,刘航涛. 煤炭资源供需分析及开发利用研究进展[ J ]. 中国矿业,2025,34( 7 ):335 - 343.
[ 14 ] 张超林,刘明亮,王恩元,等. 煤层渗透性对煤与瓦斯突出的影响规律及机理研究[J/OL]. 煤炭学报,1 - 15[2025 - 08 - 25].
[ 15 ] 毕 猛,董 群,周建伟,等. 瓦斯抽采孔离心式机械造穴增透机制及装备研发[ J ]. 煤矿安全,2023,54( 10 ):189 - 195.
[ 16 ] 齐庆新,潘一山,舒龙勇,等. 煤矿深部开采煤岩动力灾害多尺度分源防控理论与技术架构[ J ]. 煤炭学报,2018,43( 7 ):1 801 - 1 810.
[ 17 ] 冯小婷. 瓦斯消突水力冲孔冲煤孔洞测量关键技术的研究与实现[ D ]. 焦作:河南理工大学,2023.
[ 18 ] 辛新平,郭凡进,魏国营. 新型自动变径扩孔钻具[ J ]. 煤炭工程师,1998( 1 ):18 - 20,47.
[ 19 ] 黄义通,戴华宾,孙 翔,等. 高瓦斯坚硬厚煤层综放开采瓦斯治理技术研究[ J ]. 煤炭技术,2019,38( 2 ):94 - 96.
[ 20 ] 徐遵玉. 构造煤层水力造穴卸压增透瓦斯抽采技术体系与应用[ J ]. 中国矿业,2023,32( 8 ):95 - 101. |
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