CAJ | 학술논문

针对背斜构造诱发冲击危险相关特点，基于材料力学及Winkler弹性地基理论，建立了背斜构造成因力学模型，导出了该模型挠度、弯矩及应变能理论解；通过UDEC数值试验，揭示了背斜轴影响下工作面煤壁前方支承压力分布特点，研究了采动影响下支承压力峰值处盈余能量E0-Ec值变化规律。结果表明：背斜构造的形成受到多重因素共同作用，煤体埋深、上覆岩层容重、特征系数及地基系数越小，构造力偶越大，背斜越易形成；背斜不同位置处应变能不同，构造力偶越大、抗弯刚度越小，微段dx处应变能越大；随着工作面不断推进，煤壁前方支承压力与背斜轴高构造应力呈现出“连接-叠加-分离”现象；工作面越靠近背斜轴，支承压力峰值处盈余能量E0-Ec值越高，发生冲击危险的可能性就越大。
침대배사구조유발충격위험상관특점，기우재료역학급Winkler탄성지기이론，건립료배사구조성인역학모형，도출료해모형뇨도、만구급응변능이론해；통과UDEC수치시험，게시료배사축영향하공작면매벽전방지승압력분포특점，연구료채동영향하지승압력봉치처영여능량E0-Ec치변화규률。결과표명：배사구조적형성수도다중인소공동작용，매체매심、상복암층용중、특정계수급지기계수월소，구조력우월대，배사월역형성；배사불동위치처응변능불동，구조력우월대、항만강도월소，미단dx처응변능월대；수착공작면불단추진，매벽전방지승압력여배사축고구조응력정현출“련접-첩가-분리”현상；공작면월고근배사축，지승압력봉치처영여능량E0-Ec치월고，발생충격위험적가능성취월대。
Aiming at characteristics of rock burst induced by anticline structure, based on material mechanics and theory of Winkler beam on elastic foundation, mechanical model of anticline genesis was establish, the deflection, bending moment and strain energy of the model were deduced. By using UDEC numerical simulation, distribution laws of advanced abutment pressure affected by anticlinal axis were revealed, and surplus energy of E 0-E c at the peak of abutment pressure were studied. Results show that the formation of anticline is influenced by multiple factors. The smaller the buried depth of coal seam, bulk density of overlying strata, characteristic coefficient and foundation coefficient, the larger the tectonic stress, and the easier anticline structure can be formed. In addition, strain energy changes with its locations in anticline structure. The larger the tectonic stress, the smaller the flexural rigidity, and the larger the strain energy in micro-segment dx. With the continuous advancing of working face, the phenomenon of“connection-overlay-separation” of advanced abutment pressure and high tectonic <br> stress of anticlinal axis has been presented. Meanwhile, the closer the distance of working face to anti-clinal axes, the larger the surplus energy at the peak of abutment pressure, and the greater the occurrence possibility of rock burst.