【摘要】 由于煤层受地质构造的影响,在进巷时为了便于铺设运输设备和便于排水,局部巷道不得不留有较厚底煤。为了减少煤炭损失,提高回采率,在加采到底煤较厚地段时,采取背杆落底技术措施,提高了采面资源回收率。更多还原

【Abstract】 Because the coal seam is affected by the geology structure,while excavation roadway for the sake of easy to build to transport the equipments,and easy to catchment,the partial tunnel has to stay the thicker bottom coal.In order to reduce the coal loss and raise recovery ratio,the technique measures of backing poles and falling the bottom are adopted.The recovery rate of face resources is raised.更多还原