【摘要】 针对近距离煤层联合开采时上覆煤层开采对下部煤层回采巷道的影响,结合现场实际进行矿压观测,得出底板巷道围岩支撑压力变化与巷道变形的规律,为巷道合理支护提供了依据。更多还原

【Abstract】 To ensure safety mining of Xin’an Coal Mine,in the light of the influence of the overlying coal seam mining on drawing road of the underlying seam during the short distance coal seam combined mining,the strata control observation was carried out according to the actual site situation.The variation rules of supporting pressure of floor roadway surrounding rock and the deformation rules of roadway were acquired.It provided bases for rational support of the tunnel.更多还原