在过去的几年中,研制出了四种新型的桁架支护系统。这些新型支护系统的问世是由于冒顶事故经常造成人员伤亡的结果。此外,政府对一些严格规程的强制执行和一些大学进行的进一步研究,其目的也是为了改善顶板管理。 在一些技术论文和美国矿山安全和健康管理局一些条文中,对主要大巷、长壁工作面辅助巷道、特别是主要大巷交叉点的顶板管理作了论述。四种新型桁架支护系统是双连接杆平巷桁架、交岔点桁架、平巷连续支护桁架和巷道侧壁易垂直切变顶板桁架。这些支护装置是老式桁架原理的延伸,同时也是新式支架概念的发展。特别是巷道交叉点 In the past few years, four new types of truss support systems have been developed. The advent of these new types of bracing systems is the result of frequent casualties resulting from roof-top accidents. In addition, the government’s enforcement of some strict rules and further studies conducted by some universities are also aimed at improving roof management. In some technical papers and some provisions of the US Mine Safety and Health Administration, discussions are made on the roof management of the main lanes, the auxiliary roadway of the longwall face, and especially at the intersection of the main lanes. Four new trusses support system is the double connecting rod gondola truss, cross-truss truss, continuous support truss laneway and the side walls of the vertical shear roof trusses. These supports are an extension of the old truss principle and are also a development of the concept of a new stand. Especially at the intersection of the roadway