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定向钻孔及本煤层钻孔融合治理采煤工作面瓦斯

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为满足煤炭高强度开采瓦斯治理需要,结合 15303 综放工作面现场情况,提出千米定向钻孔与本煤层钻孔融合方式治理瓦斯.综合理论分析及数值模拟确定千米定向钻孔布置层位为 21~45m,在回采巷道掘进期间同步进行千米定向钻孔钻进,确保回采前钻孔钻进完成;在回采巷道按 2m间距布置本煤层钻孔,实现回采区域瓦斯预抽.现场应用后,15303 综放工作面千米定向钻孔瓦斯抽采效率较高,采面回风顺槽、回风隅角瓦斯体积分数分别控制在 0.27%、0.69%以内,保障了采面安全生产.
Combination of Directional Drilling and Coal Seam Drilling to Control Gas in Coal Mining Face
In order to meet the need of gas control in high-intensity coal mining,combined with the site situation of 15303 fully-mechanized caving face,a combination method of kilometer directional drilling and coal seam drilling was proposed to control gas.Based on theoretical analysis and numerical simulation,kilometer directional drilling layout was determined to be 21-45 m,and km directional drilling was carried out synchronously during mining roadway excavation to ensure the completion of pre-mining drilling;the coal seam boreholes were arranged at 2 m spacing in the mining roadway to realize gas pre-drainage in the mining area.After the field application,the gas drainage efficiency of 15303 directional borehole in kilometers of fully-mechanized caving face was higher,and the gas volume fraction in the return air roadway and the return air corner of the mining face was controlled within 0.27%and 0.69%respectively,which ensures the safe production of the mining face.

coal miningkilometer drillinggas pre-drainage

鲁俊伟

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山西王家岭煤业有限公司,山西 忻州 034000

煤炭开采 千米钻孔 瓦斯预抽

2024

能源与节能
山西省能源研究会 山西省节能研究会

能源与节能

影响因子:0.561
ISSN:2095-0802
年,卷(期):2024.(9)