深部底板穿层钻孔抽采半径优化

Optimization on Drainage Radius of Deep Bottom Borehole

为探究深部底板岩巷穿层钻孔合理的抽采半径及布置方式,提出了基于瓦斯含量的抽采半径考察方法;现场考察了原始煤层和底板岩巷上方卸压煤层的抽采半径,卸压煤层不同位置的抽采半径不同,且较原始煤层增大15%~45%。据此提出了穿层钻孔采用非等间距布置的方式,研究成果对加快矿井安全高效生产、采掘接替等均具有十分重要的现实意义,对相似条件突出矿井瓦斯综合防治具有借鉴意义及推广应用前景。

To explore the reasonable drainage radius and layout of borehole in deep floor roadway, it raised investigation method of drainage radius based on gas content. It investigated gas drainage radius of original coal and the pressure relief coal seam above rock roadway. The drainage radius is different at position of coal and is 15% ~45% increased by the original coal. According to the above proposed,borehole is arranged non-equidistant mode. The research results have very important realistic meaning to speed up production, safety and high efficiency mining etc. It has reference significance and application prospects to similar mine gas outburst conditions of the comprehensive prevention and control.