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一、地下矿山井巷的一般支护及其存在的问题过去,地下矿山的井巷支护都习惯地采用木材、金属做成的梯形或弧形支架,有时采用整体浇灌的混凝土或钢筋混凝土拱形或圆形支架,有时又采用天然石材或人造石材砌筑的拱形或圆形支架。这些支架在不同的历史时期内为采出矿石、保障人员的工作安全起到了相当大的作用。但是这些支架还存在着如下的一些问题:
First, the general mine underground mine shaft support and its problems In the past, underground mine shaft support are customarily used wood, metal trapezoidal or curved bracket made, and sometimes the use of the overall irrigation of concrete or reinforced concrete arch Shaped or round bracket, sometimes with natural stone or artificial stone masonry arch or circular bracket. These stents have played a significant role in the mining of ore during different historical periods to ensure the safety of personnel. However, these stents still have some problems as follows: