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无煤柱开采是煤炭工业近二十年的重大技术革新之一。它是合理开发煤炭资源,提高采区回采率、降低掘进率、缓和采掘接续和改善技术经济效果的重要途径,提倡和推广这项新技术是当前增产挖潜的一项重大技术措施。目前已有许多矿井取得了显著的成效。如有的矿井仅在一个煤层中应用了无煤柱护巷技术,其采区回收率由过去的58.84％提高为92～94.5％,预计该矿寿命可延长十一年。同时,用煤柱护巷时的巷道维修费用是44元/年一米,取消煤柱后是2.68元/年一米。每年节省巷道维修费达230万元。有的矿井在松软
Pillarless mining is one of the major technological innovations in the coal industry for nearly two decades. It is an important way to reasonably develop coal resources, increase recovery rate of mining area, reduce drilling rate, ease mining and improve technical and economic effects. It is a major technical measure to increase production and tap potential by promoting and promoting this new technology. At present, many mines have achieved remarkable results. If some mines only apply coal pillar-free roadway protection technology in one coal seam, the recovery rate of the mining area will increase from the previous 58.84% to 92-94.5%. The mine’s life expectancy is expected to be extended by 11 years. At the same time, when using coal pillar laneway maintenance cost is 44 yuan / year a meter, after removing the pillars is 2.68 yuan / year meter. Roadway maintenance cost savings of 2.3 million yuan each year. Some mines are soft