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| Study on the influence law and mechanism of cutting permeability enhancement on extraction radius in high gas and hard coal seam |
| Guo Zeming 1, Zhang Jiale 2 |
| 1. Bofang Coal Mine, Shanxi Lanhua Technology Entrepreneurship Co., Ltd., 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 small effective radius and low efficiency of conventional extraction caused by low permeability and difficult permeability enhancement in high gas and hard coal seam, taking 3306 working face of Bofang Coal Mine as the research object, the influence law and mechanism of cutting permeability enhancement on extraction radius were studied by combining coal physical property test, numerical simulation and field test. The results show that the cutting spacing, the radius of the hole and the unloading rate are the core control parameters. The 5 m spacing +0.5 m hole radius is the optimal combination, and the effective extraction radius of 90 d is 4.5 m. Physical parameters such as coal seam firmness constitute inherent constraints. The core mechanism is the chain synergy of ' stress unloading-fracture development-seepage optimization '. After cutting, the stress unloading of coal body exceeds 6 m, the permeability increases by 106.2 times, and the gas flow is dominated by seepage. The research provides technical support for the optimization of extraction radius and efficient extraction of similar coal seams.
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| [ 1 ] 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.
[ 2 ] 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].
[ 3 ] 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.
[ 4 ] 武亚男. 顺层钻孔机械造穴增透技术及现场应用研究[ J ]. 煤,2023,32( 11 ):67 - 70.
[ 5 ] 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.
[ 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 ] 牟全斌. 我国煤层造穴增渗技术研究现状与进展[ J ]. 煤矿机械,2023,44( 2 ):65 - 68.
[ 8 ] 满忠毅. 机械截割型孔穴群煤层卸压增透机制及应用基础研究[ D ]. 徐州:中国矿业大学,2023.
[ 9 ] 耿济世. 构造煤水平井多级扩孔下钻进特性及围岩变形演化规律研究[ D ]. 徐州:中国矿业大学,2021.
[ 10 ] 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.
[ 11 ] 刘志和. 煤层气井水力 - 机械式裸眼造穴工具[ J ]. 石油机械,2008( 8 ):60 - 62.
[ 12 ] 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.
[ 13 ] 苏国祥. 机械造穴钻孔对预抽瓦斯钻孔抽采效果影响[ J ].
内蒙古煤炭经济,2021( 17 ):41 - 42.
[ 14 ] 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.
[ 15 ] 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.
[ 16 ] 聂晓辉. 3107辅助进风巷本煤层水力冲孔造穴消突技术应用
研究[ J ]. 能源技术与管理,2024,49( 6 ):70 - 72 , 100.
[ 17 ] 刘 杰,赵长鑫,张 浩,等. 白羊岭煤矿底抽巷穿层水力冲孔技术研究与应用[ J ]. 煤炭科技,2024,45( 5 ):169 - 175.
[ 18 ] 李润泽,高宏烨,韩俊丰. 机械造穴增透技术在下霍煤矿的应用[ J ]. 煤炭技术,2024,43( 9 ):217 - 220.
[ 19 ] 唐文杰,申建祥,张纪虎. 低渗煤层增透技术示范引领水力造穴效果研究[ J ]. 煤炭与化工,2020,43( 10 ):96 - 101,104.
[ 20 ] 王 亮,廖晓雪,褚 鹏,等. 瓦斯抽采穿层钻孔钻扩造穴卸压增透机理研究[ J ]. 煤炭科学技术,2021,49( 5 ):75 - 82.
[ 21 ] 杨继东,仝艳军. 深部突出矿井采空区瓦斯地面井高效抽采
技术[ J ]. 工矿自动化,2025,51( 6 ):15-20.
[ 22 ] 刘 刚,褚廷湘,朱天儒,等. 气体抽排对上隅角低氧治理
效果及采空区煤自燃影响研究[J]. 工矿自动化,2025,51(
5 ):87-95.
[ 23 ] 刘 刚,褚廷湘,朱天儒,等. 气体抽排对上隅角低氧治理
效果及采空区煤自燃影响研究[ J ]. 工矿自动化,2025,51
( 5 ):87-95. |
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