针对某矿15号煤15206综采工作面巷道掘进过程中,运输煤矸的皮带机在掘进过程中过断层时极易出现机头机尾翻翘、卡链、跳链和断链等设备故障,自主研发了简易的矿压煤矸运输皮带机,并得出主要结论:通过经验公式计算该矿煤矸皮带机驱动功率...针对某矿15号煤15206综采工作面巷道掘进过程中,运输煤矸的皮带机在掘进过程中过断层时极易出现机头机尾翻翘、卡链、跳链和断链等设备故障,自主研发了简易的矿压煤矸运输皮带机,并得出主要结论:通过经验公式计算该矿煤矸皮带机驱动功率为48.72~25.83 k W,将原采用的DSJ-80/40/2×40煤矸运输皮带机改为型号为DSJ-80/40/2×55的皮带机;同时,对皮带机进行改进,并应用于15207工作面,由观测结果发现,本矿设计的简易煤矸皮带机可满足该矿井的需求。展开更多
A paste-like self-flowing pipeline transportation backfilling technology with coal gangue as aggregate is proposed to remove the potential damage caused by coal gangue piles. As well, the difficult problems of recover...A paste-like self-flowing pipeline transportation backfilling technology with coal gangue as aggregate is proposed to remove the potential damage caused by coal gangue piles. As well, the difficult problems of recovering high quality safety coal pillars and deep mining of the Suncun Coal Mine （SCM）, Xinwen Coal Group, Shandong are resolved. The physical-chemical properties of coal gangue, optimized proportion of materials, backfilling system and craft in the SCM were studied in the laboratory and then an industrial test was carried out on high quality coal pillars under a town. The results show that finely crushed kaolinized and fresh gangue with granularity less than 5 mm can be used as aggregate with fly ash to replace part of the cement and a composite water reducer as an additive, accounting for 1.0%-1.5% of the total amount of cement and fly ash. The recommended proportion is l（cement）：4（fly ash）： 15（coal gangue）, with a mass fraction of 72%-75%, rheoiogical paste-like properties and a strength of more than 0.7 MPa at 7 d. The sequence of adding cement, fly ash, water reducer and then coal gangue ensures that the suspended state of the slurry, reducing the wear and jam of pipelines. The working face is advancing continuously by the alternating craft of building block walls with coal gangue and backfilling mined-out gobs with paste-like slurry. The recovery rate is as high as 90% with a backfilling cost of 36.9 YuarffL good utilization of coal gangue and no subsidence on the surface. This technology provides a good theoretical basis and application experience for coal mines, cement backfilling with paste-like slurry.展开更多
文摘针对某矿15号煤15206综采工作面巷道掘进过程中,运输煤矸的皮带机在掘进过程中过断层时极易出现机头机尾翻翘、卡链、跳链和断链等设备故障,自主研发了简易的矿压煤矸运输皮带机,并得出主要结论:通过经验公式计算该矿煤矸皮带机驱动功率为48.72~25.83 k W,将原采用的DSJ-80/40/2×40煤矸运输皮带机改为型号为DSJ-80/40/2×55的皮带机;同时,对皮带机进行改进,并应用于15207工作面,由观测结果发现,本矿设计的简易煤矸皮带机可满足该矿井的需求。
基金Projects 2006BAB02A03 supported by the National Key Technology Research and Development ProgramProjects 2006BA02B05 by the 11th Five Year Key Program for Science and Technology Development of China
文摘A paste-like self-flowing pipeline transportation backfilling technology with coal gangue as aggregate is proposed to remove the potential damage caused by coal gangue piles. As well, the difficult problems of recovering high quality safety coal pillars and deep mining of the Suncun Coal Mine （SCM）, Xinwen Coal Group, Shandong are resolved. The physical-chemical properties of coal gangue, optimized proportion of materials, backfilling system and craft in the SCM were studied in the laboratory and then an industrial test was carried out on high quality coal pillars under a town. The results show that finely crushed kaolinized and fresh gangue with granularity less than 5 mm can be used as aggregate with fly ash to replace part of the cement and a composite water reducer as an additive, accounting for 1.0%-1.5% of the total amount of cement and fly ash. The recommended proportion is l（cement）：4（fly ash）： 15（coal gangue）, with a mass fraction of 72%-75%, rheoiogical paste-like properties and a strength of more than 0.7 MPa at 7 d. The sequence of adding cement, fly ash, water reducer and then coal gangue ensures that the suspended state of the slurry, reducing the wear and jam of pipelines. The working face is advancing continuously by the alternating craft of building block walls with coal gangue and backfilling mined-out gobs with paste-like slurry. The recovery rate is as high as 90% with a backfilling cost of 36.9 YuarffL good utilization of coal gangue and no subsidence on the surface. This technology provides a good theoretical basis and application experience for coal mines, cement backfilling with paste-like slurry.
