井下煤炭回收后地表构筑物损坏程度鉴定

The Surface Structure Damage Identification after Underground Coal Recovery

建(构)筑物下开采时首要目的是保证地表建筑物的安全,所以在开采前要提前预计地表变化情况。采用概率积分法对高速公路下两个工作面开采后的地表变形进行预计,将预计结果与规程中的地表变形保护标准进行对比分析。最后得出该开采方案会造成桥台处下沉值超标,会造成桥台损坏,影响正常使用,但公路其他位置开采后变形值仍然处于保护标准范围之内。

The primary purpose of the building（structure） under mining was to ensure the safety of surface buildings, so surface changes before mining should be expected in advance. The probability integral method for surface mining working face under the highway was used to expect the deformation protection for two working face after mining, expected results and rules of surface deformation protection standards were analyzed and compared. The result showed the mining plan would make the abutment subsidence values exceed the standard and cause the abutment damage, affect the normal use of the highway, but other positions after mining deformation value was still in the scope of protection standard.