CAJ | 학술논문

岩石巷道综合机械化快速掘进有助于改善采掘接续紧张的局面，而岩石硬度是影响综掘设备快速掘进的关键因素之一。针对硬岩巷道围岩岩性特点，利用超深孔预裂爆破技术，对硬岩巷道岩体强度进行弱化，并通过工程实践检验预裂效果，结果表明：硬岩巷道超深孔预裂爆破后，钻孔周围形成压碎区、裂隙区，使岩体有效强度降低，有利于综掘截割机具经济破岩；理论及数值模拟分析得出钻孔爆破后形成半径为1．8 m左右的松动破坏区；通过对新庄孜矿-812 m水平B4胶带大巷硬岩进行超深孔预裂爆破，钻孔窥视及工程验证爆破松动半径能够达到1．5～2．5 m之间，取得了良好的岩体强度弱化效果，为硬岩巷道机械化快速施工技术研究提供指导。
암석항도종합궤계화쾌속굴진유조우개선채굴접속긴장적국면，이암석경도시영향종굴설비쾌속굴진적관건인소지일。침대경암항도위암암성특점，이용초심공예렬폭파기술，대경암항도암체강도진행약화，병통과공정실천검험예렬효과，결과표명：경암항도초심공예렬폭파후，찬공주위형성압쇄구、렬극구，사암체유효강도강저，유리우종굴절할궤구경제파암；이론급수치모의분석득출찬공폭파후형성반경위1．8 m좌우적송동파배구；통과대신장자광-812 m수평B4효대대항경암진행초심공예렬폭파，찬공규시급공정험증폭파송동반경능구체도1．5～2．5 m지간，취득료량호적암체강도약화효과，위경암항도궤계화쾌속시공기술연구제공지도。
Fully mechanized rapid excavation in rock roadways is helpful to improve the intensive situation of the mining and driving continuance .One of the key factors is the rock hardness , which affects rapid excavation of fully mechanized equipment .Surrounding rock characteristics of hard rock roadways were concerned , the tech-nology of the pre-splitting blasting in deep boreholes was used to weaken hard rocks in roadways , and the engi-neering practice was carried out to examine the effect of pre -splitting .The results showed that after pre -split-ting blasting in deep boreholes , crushed and fractured zones appear around the boreholes , the effective strength of rocks were reduced in the crushed and fractured zones , which ensures economic breaking rocks by fully mech-anized cutting machines .Theoretical analysis and numerical simulation results showed that fractured zone with radius of about 1.8 m appeares after blasting .The technology was used to weaken hard rocks in B 4 belt convayor roadway at -812 m level in Xinzhuangzi Coal Mine .The results by observation in borehols and engineering veri-fication showed that blasting loosen radius reaches 1.5 m to 2.5 m, good weakening results were achieved , which provides important guidance for the mechanized rapid excavation technology research in rock roadways .