摘要
针对超前支护存在的问题,通过叠加原理和有限差分原理,研究了超前支护装备-顶板之间相互作用力.采用叠加原理建立超前支护装备横、纵梁变形协调方程,并将其作为小支撑组的绝对位移.采用有限差分理论,并根据顶板的"三边固支,一边简支"的边界条件对建立了顶板的力学模型.采用ANSYS对超前支护装备-顶板耦合体系进行求解,结果表明:超前支护装备的最大应力发生于后部横、纵梁接触处为258 MPa,最大位移发生于中间纵梁后部及中纵梁与后部横梁连接处为2.219 mm.顶板的最大应力位于后部两角处为7.11 MPa,变形从迎头向后逐渐增大为7.77 mm.
Aiming at problems of the advanced support and using the principle of superposition and the finite difference principle, this paper studied the interaction of advanced support-roof coupling. Based on the principle of superposition, this study established the deformation compatibility equation of horizontal and longitudinal beam of the advanced support equipment, and took it as the absolute displacement of small support groups. By using the finite difference principle and according to the ＂trilateral clamped, while simply supported＂, this paper simulated the mechanical model of roof. Using ANSYS for the mechanical simulation of advanced support-roof system in condition of supporting is established and the mechanical response was obtained. The results show that the maximum stress of 258 MPa of advanced support equipment occurs in the rear of the horizontal beam and longitudinal beam contacting location. The maximum displacement of 2.219 mm occurs in the middle and rear back of longitudinal beam connection location. The maximum stress of 7.11 MPa is located at the rear of the corners of the roof. The deformation increases gradually from head-on back to 7.77 mm.
出处
《辽宁工程技术大学学报（自然科学版）》
CAS
北大核心
2015年第4期500-504,共5页
Journal of Liaoning Technical University (Natural Science)
