CAJ | 학술논문

将西部矿区高水平应力岩层巷道顶板受力特征简化为含纵向裂隙的岩石单轴压缩问题，选取砂岩材料为试验对象，并对其强度、变形及破坏形态进行试验研究。试验结果表明：纵向裂隙砂岩随着裂隙长度的增大，峰值强度和峰值应变先逐渐减小后又有所增大，裂隙长度为42 mm时达到最小值；砂岩试样沿预制裂隙尖端发生纵向劈裂，但非均质性对主要次生裂纹的数目和扩展路径具有很大的影响。与无充填相比，石膏充填对裂隙砂岩强度的提升并不明显，而高强水泥具有较好的加固效果，与无充填相比峰值强度平均值增大22.27%。研究成果对西部矿区的岩石力学和围岩稳定性控制理论的发展具有积极意义。
장서부광구고수평응력암층항도정판수력특정간화위함종향렬극적암석단축압축문제，선취사암재료위시험대상，병대기강도、변형급파배형태진행시험연구。시험결과표명：종향렬극사암수착렬극장도적증대，봉치강도화봉치응변선축점감소후우유소증대，렬극장도위42 mm시체도최소치；사암시양연예제렬극첨단발생종향벽렬，단비균질성대주요차생렬문적수목화확전로경구유흔대적영향。여무충전상비，석고충전대렬극사암강도적제승병불명현，이고강수니구유교호적가고효과，여무충전상비봉치강도평균치증대22.27%。연구성과대서부광구적암석역학화위암은정성공제이론적발전구유적겁의의。
The roof mechanical characteristics in high horizontal stress roadway in the western mining area is simplified as a problem of rock sample containing the lengthways fissure under uniaxial com-pression. The strength, deformation and failure mode of sandstone which is chosen are discussed. The results show that, with the increasing of fissure length, peak strength and peak strain of sandstone con-taining a lengthways fissure first decreases and then rises slightly, and reaches the least value when the fissure length is 42 mm. Lengthways splitting failure in sandstone samples occurs along the prepared fissure tip, but the heterogeneity has an obvious influence on the number of main secondary crack and crack extending path. Comparing with the no-filling sandstone, gypsum filling is not apparent to the promotion of sandstone strength containing lengthways fissure; while the high strength cement has a good reinforcement effect with average peak strength increasing by 22.27%. The research achievement has a positive significance on the development of rock mechanics and the surrounding rock stability controlling theory in the western mining area.