CAJ | 학술논문

利用非连续变形分析方法（DDARF）对单节理锚固试件在单轴压缩条件下的变形破坏及裂隙扩展过程进行分析，并以深部厚顶煤综放沿空掘巷--赵楼煤矿11302工作面轨道巷为工程背景，应用DDARF对沿空巷道围岩的变形破坏及控制机制进行研究，同时利用地质力学模型试验及现场试验进行对比验证。重点分析了沿空巷道围岩裂隙演化规律，并定义裂隙率Rc及裂隙减少率Rr两个指标对 DDARF 计算中的沿空巷道裂隙演化规律进行定量分析。研究结果表明：采用 DDARF方法对单节理试件在无锚和加锚条件下的单轴压缩试验计算与室内试验结果相吻合；对沿空掘巷过程中巷道围岩变形情况进行DDARF计算，结果显示，围岩变形呈现沿空帮>顶板>实体帮>底板的变化趋势，与模型及现场试验监测数据相符；根据cR 及Rr两个指标对计算得到的无锚和加锚沿空巷道围岩裂隙发育情况进行定量分析，结果显示，沿空巷道围岩破坏趋势为cI cI cI IR >R >R ，与变形趋势相一致；虽然锚固效果明显，但由于Ⅰ区、Ⅱ区本身围岩破碎严重，支护后裂隙率最大的RcI仍然是裂隙率最小的RcI I的2.13倍，为了维护围岩稳定性，除了进行锚杆（索）非对称支护外，还应对Ⅰ区、Ⅱ区关键部位增加支护措施。DDARF方法关于沿空巷道围岩变形破坏的计算结果与实际工程相近，可有效开展裂隙演化与变形破坏机制研究，分析此类巷道的控制对策。
이용비련속변형분석방법（DDARF）대단절리묘고시건재단축압축조건하적변형파배급렬극확전과정진행분석，병이심부후정매종방연공굴항--조루매광11302공작면궤도항위공정배경，응용DDARF대연공항도위암적변형파배급공제궤제진행연구，동시이용지질역학모형시험급현장시험진행대비험증。중점분석료연공항도위암렬극연화규률，병정의렬극솔Rc급렬극감소솔Rr량개지표대 DDARF 계산중적연공항도렬극연화규률진행정량분석。연구결과표명：채용 DDARF방법대단절리시건재무묘화가묘조건하적단축압축시험계산여실내시험결과상문합；대연공굴항과정중항도위암변형정황진행DDARF계산，결과현시，위암변형정현연공방>정판>실체방>저판적변화추세，여모형급현장시험감측수거상부；근거cR 급Rr량개지표대계산득도적무묘화가묘연공항도위암렬극발육정황진행정량분석，결과현시，연공항도위암파배추세위cI cI cI IR >R >R ，여변형추세상일치；수연묘고효과명현，단유우Ⅰ구、Ⅱ구본신위암파쇄엄중，지호후렬극솔최대적RcI잉연시렬극솔최소적RcI I적2.13배，위료유호위암은정성，제료진행묘간（색）비대칭지호외，환응대Ⅰ구、Ⅱ구관건부위증가지호조시。DDARF방법관우연공항도위암변형파배적계산결과여실제공정상근，가유효개전렬극연화여변형파배궤제연구，분석차류항도적공제대책。
DDARF (discontinuous deformation analysis for rock failure) method was used to research the roadway along goaf of 11302 workface in Zhaolou Colliery. In order to get its failure deformation and control mechanism, DDARF was first used to analyze the crack propagation of single joint anchored specimen under uniaxial compression, then the stimulation result of real roadway was compared with monitoring data from geomechanical model test and field test, to verify its correctness. The focus was on the crack evolution law of surrounding rock in the roadway along goaf. In order to quantitatively analyze the crack evolution in DDARF calculation, two indexes of cR (crack ratio) and rR (crack reduction ratio) were defined. Research results showed that the DDARF simulation results were consistent with uniaxial compression test of single joint anchored specimen. In the DDARF calculation of surrounding rock deformation in the roadway driving along goaf, it was shown that the deformation of coal side next to goaf was the largest, followed by roof and integrated coal side, floor was the least, and the monitoring data from model test and field test were both consistent with the result. According to the two indexes cR and rR , quantitative analyses was conducted to compare the crack evolution of non-anchored and anchored roadways, and the result was consistent with the deformation trend that is cI cI cI IR >R >R . As the surrounding rock had been seriously crushed, although supporting scheme was effectively, the max crack ratio cIR with anchor supported was still 2.13 times of the cI IR . In order to maintain the stability of surrounding rock, the key parts of zoneⅠand zoneⅡshould be strengthened besides asymmetric supporting with anchors. For the stimulate result was closer to actual engineering, DDARF method could not only be used to research crack evolution and failure deformation, but also guide countermeasure to control these roadways effectively.