煤矿开采对公路桥的安全影响现状评价

摘要

根据山西某矿地质采矿条件及开采现状,对南一采区开采影响进行了地表移动与变形计算,给出了开采影响下公路桥地表移动变形值,结合公路桥受采动影响变形规律及公路桥抗采动变形能力与相关规程规范,评价了煤矿开采对公路桥的损害程度.结果表明,煤矿开采后引起的公路桥变形值超过了允许变形值,该公路桥将受到采动影响,且由于采动影响时间的滞后性,公路桥未来将会产生一定损害.%According geological situation and mining status of one coal mine in Shanxi province, and then surface movement and de-formation of mining influence were calculated, which by mining in south one mining area, and surface movement deformation value of highway bridge under mining influence was put forward, combining deformation law of highway under mining influence, resistance of mining deformation of highway bridge and some related specifications and codes, the damage extent of highway bridge by coal mining was evaluated.The results showed that the maximal deformation value of highway bridge after coal mining exceeded allowable value, so highway bridge would be influenced by coal mining, as hysteresis quality of coal mining time, highway bridge would be damage in some degree in the future.