CAJ | 학술논문

用相似材料制作含交叉裂隙岩体无锚及加锚试件，以主次裂隙之间角度、锚固位置及锚杆与加载方向之间角度为变化参数制作32组试件，对试件进行单轴压缩试验，研究含交叉裂隙节理岩体的锚固效应及破坏模式。研究表明：在主、次裂隙位置不变的情况下，锚固位置在裂隙交叉点上方或下方时能得到锚固强度最大值，当锚固位置通过裂隙交叉点时，锚固强度不是最大值，但此时锚后试件峰值强度最稳定；大部分含交叉裂隙加锚岩体强度高于含单一裂隙加锚岩体；主、次裂隙夹角影响节理岩体加锚后力学性能，主、次裂隙夹角为30°左右时节理岩体锚固效果最好；锚杆增强了含交叉裂隙节理岩体抵抗裂隙扩展的能力，降低了含交叉裂隙节理岩体劈裂破坏出现的突然性。
용상사재료제작함교차렬극암체무묘급가묘시건，이주차렬극지간각도、묘고위치급묘간여가재방향지간각도위변화삼수제작32조시건，대시건진행단축압축시험，연구함교차렬극절리암체적묘고효응급파배모식。연구표명：재주、차렬극위치불변적정황하，묘고위치재렬극교차점상방혹하방시능득도묘고강도최대치，당묘고위치통과렬극교차점시，묘고강도불시최대치，단차시묘후시건봉치강도최은정；대부분함교차렬극가묘암체강도고우함단일렬극가묘암체；주、차렬극협각영향절리암체가묘후역학성능，주、차렬극협각위30°좌우시절리암체묘고효과최호；묘간증강료함교차렬극절리암체저항렬극확전적능력，강저료함교차렬극절리암체벽렬파배출현적돌연성。
The bolted and unbolted jointed rock mass specimens with cross-cracks were simulated by similar materials. The angles between the primary cracks and the secondary cracks,the positions of the bolts and the angles between the bolts and the loading directions were taken as the control parameters of the specimens leading to the total of 32 groups of specimens of similar material be produced. The uniaxial compression tests of the specimens were carried out to obtain the bolting effect and the failure modes of the jointed rock masses with cross-cracks. The test results showed that:(1) The strengths of the specimen reached the maximum values if the bolting position was above or under the crossing points of the cross-cracks for the group of specimens with the same angle between the primary and secondary cracks. When the bolting position went through the crossing points of the cross-cracks,the strengths of the specimens did not reach the maximum values but its after peak values were stable. (2) The majority peak strength values of the bolted rock masses with joints and cross-cracks are higher than those of the ones with a single crack. (3) The angles between the primary and the secondary cracks affected the mechanical properties of jointed rock masses with bolting. The jointed rock mass had the best bolting effect when the angle between the primary crack and the secondary crack was about 30°. (4) The bolt increased the ability of the jointed rock mass to resist the cross-crack propagation and reduced the possibility of jointed rock masses to a sudden failure.