中国煤炭
中國煤炭
중국매탄
CHINA COAL
2014年
2期
101-104
,共4页
瓦斯抽采%合理封孔深度%数值模拟%钻屑量%钻屑瓦斯解吸量
瓦斯抽採%閤理封孔深度%數值模擬%鑽屑量%鑽屑瓦斯解吸量
와사추채%합리봉공심도%수치모의%찬설량%찬설와사해흡량
gas drainage%rational borehole sealing depth%numerical simulation%drilling cuttings weight%gas desorption amount of drilling cuttings
根据赵固二矿二1煤层的物理力学参数，利用 FLAC3 D数值模拟软件模拟巷道开挖后所受到的力学状态，根据钻屑量和钻屑瓦斯解吸量现场实测的数据，确定出巷道的卸压带、应力集中带和原始应力带.通过不同封孔深度的抽采效果验证，得出瓦斯抽采钻孔封孔深度必须超过应力集中带，最后确定合理封孔深度为13 m.
根據趙固二礦二1煤層的物理力學參數，利用 FLAC3 D數值模擬軟件模擬巷道開挖後所受到的力學狀態，根據鑽屑量和鑽屑瓦斯解吸量現場實測的數據，確定齣巷道的卸壓帶、應力集中帶和原始應力帶.通過不同封孔深度的抽採效果驗證，得齣瓦斯抽採鑽孔封孔深度必鬚超過應力集中帶，最後確定閤理封孔深度為13 m.
근거조고이광이1매층적물리역학삼수，이용 FLAC3 D수치모의연건모의항도개알후소수도적역학상태，근거찬설량화찬설와사해흡량현장실측적수거，학정출항도적사압대、응력집중대화원시응력대.통과불동봉공심도적추채효과험증，득출와사추채찬공봉공심도필수초과응력집중대，최후학정합리봉공심도위13 m.
According to physical and mechanical parameters of No. 2 1 coal seam of Zhaogu No. 2 Mine,the numerical simulation software FLAC3D was used to simulate the mechanical state of roadway after driving. Using measured data of drilling cuttings and gas desorption amout of drilling cuttings,the pressure release zone,stress concentration zone and original stress zone were determined. The gas drainage results for different borehole sealing depths showed that the depth must be deeper than stress concentration zone, and the rational borehole sealing depth is 1 3 m.
