CAJ | 학술논문

为了研究钻孔卸压效果影响因素之间的关系,采用RFPA数值模拟软件,分析了钻孔直径、钻孔间距、煤体应力等对卸压效果的影响.数值模拟及理论分析得出:在其他因素一定的条件下,卸压效果随钻孔直径的增大而提高;煤体中的压力越大,卸压效果越显著;煤体在高应力状态下(30 MPa),钻孔间距为3 m时卸压效果好,而在低应力状态下(20 MPa),钻孔间距为2 m时卸压效果好.
위료연구찬공사압효과영향인소지간적관계,채용RFPA수치모의연건,분석료찬공직경、찬공간거、매체응력등대사압효과적영향.수치모의급이론분석득출:재기타인소일정적조건하,사압효과수찬공직경적증대이제고;매체중적압력월대,사압효과월현저;매체재고응력상태하(30 MPa),찬공간거위3 m시사압효과호,이재저응력상태하(20 MPa),찬공간거위2 m시사압효과호.
In this paper, the influence of the hole diameter, hole spacing and coal body stress on the pressure relief effect was analyzed with REPA numerical simulation software in order to study the relation among the influence factors of the borehole pressure relief effect. It was concluded from the numerical simulation and theoretical analysis that the pressure relief effect got improvement with the increase of hole diameter under the condition that other factors unchanged; the greater the pressure in the coal body, the more significant the pressure relief effect; under the high stress (30MPa) condition of coal body, the pressure relief effect is better with the hole spacing of 3m, and under the low stress (20MPa) condition of coal body, the pressure relief effect is better with the hole spacing of 2m.