论文部分内容阅读
整体混凝土支护的特点是造价较低、机械强度较高,同时支护作业还很可能实现机械化。在煤炭工业中建井工程的整体支护量约占总支护量的95％;在采矿工业中约占91％。井筒支护,按建筑规范和规程规定,当最小支护厚度为200～300mm(取决于井筒的掘进深度及其穿过的矿山地质条件)时,采用的混凝土标号不应低于B-15。在实践中由于矿山地质因素的不同,永久支护的厚
The overall concrete support is characterized by lower cost, higher mechanical strength, and at the same time support operations are likely to be mechanized. In the coal industry, the total amount of support for well construction projects accounts for about 95% of the total supporting capacity and about 91% for the mining industry. Borehole support, as specified in the Building Code and Regulations, shall have a concrete grade not less than B-15 when the minimum bracing thickness is 200-300 mm (depending on the borehole depth and the geological conditions of the mine passing through it). In practice due to the different geological factors of mines, the thickness of permanent support