浅埋厚煤层条带充填开采效果研究
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摘要
由于西部浅埋矿区特殊的赋存条件,煤层开采严重威胁西部矿区脆弱的生态环境,以煤矿自有的煤矸石、周边的沙子,电厂的粉煤灰及水泥制作膏体材料,通过力学实验证明了充填体强度符合煤矿开采应用。通过数值模拟实验,验证了条带充填开采控制地表沉陷的效果,浅埋厚煤层条带充填开采只会在开采留设煤柱时形成垮落带,并且导水裂隙带高度发育不会到达含水岩层。
Because of the special conditions of the shallow buried mining area in the west of China,coal seam mining seriously threatens the fragile ecological environment of the western mining area. the coal gangue, the surrounding sand, the fly ash and cement of the power plant are used as paste materials. Through mechanical experiments, the strength of backfill is proved to be in accordance with the application of coal mining, and the effect of strip filling mining on controlling surface subsidence is verified by numerical simulation experiment. Strip filling mining in shallow and thick coal seam will only form caving zone when coal pillar is set up, and the height of water-conducting fissure zone will not reach the water-bearing strata.
Because of the special conditions of the shallow buried mining area in the west of China,coal seam mining seriously threatens the fragile ecological environment of the western mining area. the coal gangue, the surrounding sand, the fly ash and cement of the power plant are used as paste materials. Through mechanical experiments, the strength of backfill is proved to be in accordance with the application of coal mining, and the effect of strip filling mining on controlling surface subsidence is verified by numerical simulation experiment. Strip filling mining in shallow and thick coal seam will only form caving zone when coal pillar is set up, and the height of water-conducting fissure zone will not reach the water-bearing strata.
引文
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[11]彭志华.胶结充填体力学强度尺寸效应[J].中国矿业,2009,18(7):88-90.
[2]刘士奇,鲍俊睿,杨宁.粉煤灰对膏体充填材料特性影响试验[J].煤炭技术,2016,35(1):33-35.
[3]吕文宏,孙凯华,郑天斌.风积砂在膏体充填材料中的添加研究及应用[J].煤炭技术,2015,34(10):9-11.
[4]马娟,刘玉香,张和生.塌陷区充填复垦与煤矿膏体充填开采的对比研究[J].煤炭技术,2014,33(6):241-243.
[5]宋伟林.大明矿综采膏体充填工作面采、封堵、充填实践[J].煤炭技术,2012,31(5):58-59.
[6]樊克恭,王腾飞.浅埋厚煤层回采巷道支护参数优化研究[J].煤炭技术,2017,36(7):10-12.
[7]胡大冲,张保良,孙传平,等.浅埋煤层护巷煤柱合理留设研究[J].煤炭技术,2017,36(6):96-98.
[8]常庆粮,周华强,柏建彪,等.膏体充填开采覆岩稳定性研究与实践[J].采矿与安全工程学报,2011,28(2):279-282.
[9]李亮,张希巍,Hassani Ferri.国外膏体充填基础理论研究综述[J].中国矿业,2016,25(11):132-138,156.
[10]梁正召,张永彬,唐世斌,等.岩体尺寸效应及其特征参数计算[J].岩石力学与工程学报,2013,32(6):1 157-1 166.
[11]彭志华.胶结充填体力学强度尺寸效应[J].中国矿业,2009,18(7):88-90.