检索规则说明:AND代表“并且”;OR代表“或者”;NOT代表“不包含”;(注意必须大写,运算符两边需空一格)
检 索 范 例 :范例一: (K=图书馆学 OR K=情报学) AND A=范并思 范例二:J=计算机应用与软件 AND (U=C++ OR U=Basic) NOT M=Visual
机构地区:[1]大同煤矿集团有限责任公司,山西大同037000
出 处:《煤炭科学技术》2004年第2期1-4,共4页Coal Science and Technology
摘 要:大同矿区坚硬顶板、坚硬煤层 (以下称“两硬”)的条件严重制约厚煤层的高产高效开采技术的应用 ,尤其是采出率难以提高。经过 10多年的科技攻关 ,对顶煤弱化、顶板控制及装备等技术的试验 ,得出了一种在两硬条件下矿井高产高效及高采出率的综放开采技术 ,取得较好的经济效益。The conditions of hard roof and hard seam in Datong mining area have seriously restricted the high production and high efficient mining technology in thick seams. Specially, it is hard to improve the coal recovery rate. After 10 years of science and research development in the top coal softening, roof control, equipment, and other technologies, a fully mechanized coal caving mining technology with high production, high efficiency and high coal recovery under the two hard conditions was developed with a good economic benefit.
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在链接到云南高校图书馆文献保障联盟下载...
云南高校图书馆联盟文献共享服务平台 版权所有©
您的IP:216.73.216.15