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采用分层崩落法开采急倾斜矿体时,回采作业始终是在松散的覆盖岩下进行,采场地压的显现也就不同于在直接顶板下进行回采的缓倾斜矿体。由于假顶之上是松散的覆盖岩,随着回采工作面的推进,假顶逐渐地暴露出来。这个过程表现在地压上便是逐渐形成压力拱的过程(如图1)。因此,对于顶板的科学管理,实际上是要控制一定跨度的压力拱,跨度大压力也大,跨度小压力也小。不同矿山,可以根据本矿的岩石特性,
In the case of mining steeply inclined orebodies using the subsided caving method, the mining operation is always carried out under loose cover rock. The stope pressure is also different from that of the gently inclined ore body under direct roofing. Due to the loose overburden rock above the false top, as the mining face progressed, the false top gradually exposed. This process is manifested in the pressure on the gradual formation of pressure arch process (Figure 1). Therefore, the scientific management of the roof, in fact, is to control the pressure arch of a certain span, the pressure is also large span, small span pressure is small. Different mines, according to the rock characteristics of the mine,