论文部分内容阅读
库兹巴斯煤炭科学研究所研制的基建巷道和准备巷道连接部的椭圆形钢筋混凝土支架已在沿海煤炭生产联合公司的各煤矿中推广应用。在沿海煤矿的条件下,由于有膨胀性岩层和岩层受湿膨胀的倾向,所以,连接部的掘进和支护作业都很复杂,这是引起强大矿山压力的原因。 连接部的支架(见图1)是用СВ—27型钢筋和混凝土构成的四节式椭圆形支架。在开凿连接部的过程中,椭圆形支架起临时支架的作用,而在浇灌混凝土之后则起刚性钢筋的作用,从而可以增加混凝土支架的承重能力。连接部的混凝土浇灌作业应在巷道
The infrastructure roadway developed by Kuzbass Coal Research Institute and the oval-shaped reinforced concrete support for the roadway preparation department have been popularized and applied in the coal mines of the Coastal Coal Production Joint Company. Under the conditions of coastal coal mines, tunneling and supporting operations are complicated due to the tendency of expansive rock formations and formations to swell by wetting, which is the cause of the pressure of a strong mine. The bracket of the connection (see Figure 1) is a four-section oval bracket made of steel СВ-27 and concrete. In the process of cutting the connecting part, the oval bracket acts as a temporary bracket, and after pouring the concrete, it plays the role of a rigid reinforcing bar, which can increase the bearing capacity of the concrete bracket. Concrete joints in the watering operations should be in the roadway