厚火成岩覆盖条件下采煤的地表岩移观测与研究

Observation and research of mining surface rock displacement covered by thick igneous rock

基于宣东煤矿Ⅲ3煤层三采区位于顾家营村和京张高速公路下方,回采工作可能对地面建(构)筑物造成影响的问题,结合该煤层倾角平缓、埋深大且为巨厚火成岩覆盖的特殊地质赋存条件,通过对Ⅲ3煤层二采区在回采过程中开展地表岩移观测与研究,总结出了平缓倾角的中厚煤层在大采深且为巨厚火成岩覆盖条件下,开采过程中的地表变形规律,为三采区的开采设计和安全回采提供了依据。

Ⅲ3 coal seam of Xuandong Mine located under highway of Gujiaying village and Beijing Zhangjiakou, the recover mining may affect surface building, based on special geological conditions of gentle dip coal seam, deep buried coal seam, covered by thick igneous rock, surface rock displacement, the surface deformation changing law of tick coal seam with gentle dip, large depth and covered by t hick igneous rock was summarized, which provided reference for safe recovery mining of No. 3 mining area.