支架设置拉杆的目的是为了加强其稳定性,将支架形成整体结构,由平面力系变为空间力系,防止支架歪斜,提高支架承载能力。由于金属支架的广泛使用,拉杆作用显得特别重要。在分析冒顶事故时,不管是回采工作面还是巷道冒顶,大多可归结为支架失稳所致。尤其倾角较大、复合顶板、假顶和再生顶板的冒落,更是支架整体结构不强的结果;而有的矿井工作面,如淮北、徐州等局,在使用拉杆后,安全状况得到显著改 Bracket is designed to enhance the stability of the rod, the stent formed by the overall structure of the force system by the plane into a space force, to prevent the skew bracket to improve the carrying capacity of the stent. Due to the widespread use of metal braces, tie bars are of particular importance. In the analysis of a roof accident, whether it is mining face or roof fall, most can be attributed to the stent instability. In particular, the dip angle is large, and the roofing of composite roofs, false roofs and regenerated roofs are the result of the weak overall structure of the supports. In some coalfaces, such as the Bureau of Huaibei and Xuzhou, safety conditions are significantly improved after using the tie rods change