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在开采安全深度以上的煤炭时为了保护地面的建筑物免受回采工作的有害影响,一般采用留保护煤柱的方法,采煤才可能进行。这就造成煤炭的大量损失。关于这点在巴夫洛格勒市的萨马拉河上的公路桥下开采的经验就可证明。 大桥是按德涅普罗国家交通设计院的设计于1965年建造的,没有考虑开采影响的作用。在平面图上大桥位于公路的直线段,而
In order to protect the buildings on the ground from the harmful effects of the recovery work when mining coal above the safe depth, coal mining is generally possible by means of retaining coal pillars. This caused a huge loss of coal. This is evidenced by the experience of mining under the highway bridges on the Samara River in the town of Parvograd. The Bridge was constructed in 1965 in accordance with the design of the National Transport Institute of Dnepropetry and did not take into account the effects of mining. On the plan the bridge is located on the straight line of the highway, and