摘要
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21~45 m,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2 m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。
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.
作者
鲁俊伟
LU Junwei(Shanxi Wangjialing Coal Industry Co.,Ltd.,Xinzhou 034000,Shanxi,China)
出处
《能源与节能》
2024年第9期265-267,共3页
Energy and Energy Conservation
关键词
煤炭开采
千米钻孔
瓦斯预抽
coal mining
kilometer drilling
gas pre-drainage
