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开采不同深度的急倾斜煤层时,地面会发生垂直位移和水平位移,民用建筑及工业建筑和社会文化设施将出现损坏。现有的厂房和建筑物防止下部采动影响的结构保护措施,在个别煤层有选择地进行充填,都不能防止危险的变形显现。不但有60％左右、而且在许多情况下一些矿井含煤区域内还有70～90％厂房和建筑物没有采取结构保护措施。因此,只有采取下列综合工程地质及工艺措施才能使地面建筑物的下部采动影响得以制止或降到安全程度:制定煤层群(组)和个别煤层的回采方式及顺序;确定回采方向;在有自然危险和难管理顶板的煤层采用工作
When mining steep coal seams with different depths, vertical displacements and horizontal displacements will occur on the ground and civil and industrial buildings and social and cultural facilities will be damaged. Existing buildings and structures to prevent the impact of lower mining structural protection measures, selective filling in individual seams, are not able to prevent the occurrence of dangerous deformation. Not only is it about 60%, but in many cases there are still 70-90% of buildings and structures in some coal-mined areas that have not been structurally protected. Therefore, the impact of the mining under the ground on the ground can be stopped or reduced to the safety level only by adopting the following comprehensive engineering geological and technological measures: formulating the recovery methods and sequence of coal seam group (group) and individual coal seams; determining the direction of recovery; Naturally dangerous and unmanageable roof coal seams work