CAJ | 학술논문

利用自主研发的含瓦斯煤热流固耦合三轴伺服渗流装置配合声发射监测系统，进行不同瓦斯压力作用下煤岩在常规三轴压缩下的声发射(AE)特征试验。研究结果表明，瓦斯压力对煤岩起到软化作用，随着瓦斯压力的增加煤岩在加载过程中的脆性减弱，延性增强，抗压强度和弹性模量随着瓦斯压力的增加呈现出减小的趋势。根据试验所得煤岩声发射特征与应力-应变以及声发射累积振铃数与应变关系，得出在常规三轴压缩破坏过程中不含瓦斯煤岩的破裂类型为突然破裂型，含瓦斯煤岩的破裂类型为稳定破裂型。在同时考虑应力和瓦斯压力引起煤岩损伤的基础上，建立不同瓦斯压力作用下，由声发射累积振铃数表示的煤岩损伤关系式，并对所建立的损伤关系式进行验证，验证结果表明建立的基于声发射的煤岩损伤关系式从某种程度上真实地反映了含瓦斯煤岩的破坏过程及强度特征。
이용자주연발적함와사매열류고우합삼축사복삼류장치배합성발사감측계통，진행불동와사압력작용하매암재상규삼축압축하적성발사(AE)특정시험。연구결과표명，와사압력대매암기도연화작용，수착와사압력적증가매암재가재과정중적취성감약，연성증강，항압강도화탄성모량수착와사압력적증가정현출감소적추세。근거시험소득매암성발사특정여응력-응변이급성발사루적진령수여응변관계，득출재상규삼축압축파배과정중불함와사매암적파렬류형위돌연파렬형，함와사매암적파렬류형위은정파렬형。재동시고필응력화와사압력인기매암손상적기출상，건립불동와사압력작용하，유성발사루적진령수표시적매암손상관계식，병대소건립적손상관계식진행험증，험증결과표명건립적기우성발사적매암손상관계식종모충정도상진실지반영료함와사매암적파배과정급강도특정。
Using self-developed triaxial servo-controlled seepage equipment for thermo-fluid-solid coupling of coal containing methane with acoustic emission(AE) monitoring system,this paper carried out experiment on AE characteristics of coal and rock under different gas pressures by conventional triaxial compression. Result of the test shows that,gas pressure plays a role in softening to coal and rock,with the increase of gas pressure,the brittleness of coal and rock weakened in the process of loading but the ductility enhanced,both compressive strength and elastic modulus show a decreasing trend. According to the experimental conclusions that both the relations of AE characteristics of coal and rock and stress-strain,and AE accumulative counts and strain,carried out that during the failure process of conventional triaxial compression,the rupture type of coal and rock without gas is sudden rupture,the rupture type of gaseous coal and rock is stable rupture. On the basis of taking into account the stress and gas pressure caused the damage of coal and rock,established the relation of the damage of coal and rock represented by AE accumulative counts under different gas pressures,and verified by experiments, verification results show that,based on the AE of the relation of the damage of coal and rock,to some extent,truly reflects the failure process and the strength characteristics of gaseous coal and rock.