CAJ | 학술논문

钻孔抽采影响半径是确定钻孔布置的基础参数，但关于高压水射流割缝缝槽形态及缝槽形态与钻孔抽采影响半径的影响关系目前尚无系统研究。根据缝槽形态实验结果将缝槽形态简化为圆盘，基于淹没射流结构理论分析缝槽圆盘尺寸，采用 COMSOL 软件研究不同条件煤层的割缝钻孔抽采影响半径，并进行现场测试试验。结果表明：割缝钻孔抽采影响半径与缝槽圆盘、渗透率、抽采时间、瓦斯压力等因素均呈幂函数关系，因素影响显著程度依次为渗透率、抽采时间、瓦斯压力、缝槽圆盘；高压水射流割缝缝槽体积与理论分析确定的缝槽圆盘体积的相对差值为8.33%，在抽采时间130 d时的实测钻孔抽采影响半径与数值模拟的相对差值为6.20%。
찬공추채영향반경시학정찬공포치적기출삼수，단관우고압수사류할봉봉조형태급봉조형태여찬공추채영향반경적영향관계목전상무계통연구。근거봉조형태실험결과장봉조형태간화위원반，기우엄몰사류결구이론분석봉조원반척촌，채용 COMSOL 연건연구불동조건매층적할봉찬공추채영향반경，병진행현장측시시험。결과표명：할봉찬공추채영향반경여봉조원반、삼투솔、추채시간、와사압력등인소균정멱함수관계，인소영향현저정도의차위삼투솔、추채시간、와사압력、봉조원반；고압수사류할봉봉조체적여이론분석학정적봉조원반체적적상대차치위8.33%，재추채시간130 d시적실측찬공추채영향반경여수치모의적상대차치위6.20%。
Drainage influence radius is the basic parameter for borehole layout, but the slot form of high pressure water jet slotting and its effect to borehole drainage influence radius have not been studied systematically. In this paper, slot shape was simplified as a disc according to the laboratory experiment results, and the disc size was analyzed based on the theory of submerged jet. Meanwhile, COMSOL software was used to study drainage influence radius of slotted borehole in different coal seam condi-tions, and filed tests were carried out. The results show that drainage influence radius of slotted borehole has power function relation with the slotted disc, as well as the permeability, time, and gas pressure, while the significant degree of the influence factors is in sequence of permeability, time, gas pressure and slotted disc. The relative difference of slot volume in actual high-pressure water jet slotting and slotted disc volume determined by theoretical analysis is about 8.33%. Meanwhile, when the drainage time is 130d, the relative difference of drainage influence radiuses between the measured and numerical simulation is 6.20%.