中国煤炭
中國煤炭
중국매탄
CHINA COAL
2014年
4期
60-64
,共5页
极近距离煤层%多采空区%巷道煤柱%巷道支护%钢岩锚%预爆破
極近距離煤層%多採空區%巷道煤柱%巷道支護%鋼巖錨%預爆破
겁근거리매층%다채공구%항도매주%항도지호%강암묘%예폭파
ultra-close coal seams%many gobs%roadway coal pillar%roadway support%steel rock anchor%pre-blasting
针对大同矿区侏罗纪下组可采煤层多、层间距离近的特点，应用数值模拟对极近距离煤层多采空区下巷道稳定性影响因素进行了系统研究，研究结果表明近距离煤层群开采时，上层煤柱宽度越大，巷道越靠近采空区，层间距越大，下层巷道顶板受力越小，越容易维护。对巷道稳定性的影响从大小依次为煤柱下方不同水平位置影响大于层间距影响大于煤柱宽度影响。基于此，提出从巷道布置、支护措施、预爆破上覆煤柱等来解决极近距离煤层多采空区下巷道的稳定问题。
針對大同礦區侏囉紀下組可採煤層多、層間距離近的特點，應用數值模擬對極近距離煤層多採空區下巷道穩定性影響因素進行瞭繫統研究，研究結果錶明近距離煤層群開採時，上層煤柱寬度越大，巷道越靠近採空區，層間距越大，下層巷道頂闆受力越小，越容易維護。對巷道穩定性的影響從大小依次為煤柱下方不同水平位置影響大于層間距影響大于煤柱寬度影響。基于此，提齣從巷道佈置、支護措施、預爆破上覆煤柱等來解決極近距離煤層多採空區下巷道的穩定問題。
침대대동광구주라기하조가채매층다、층간거리근적특점，응용수치모의대겁근거리매층다채공구하항도은정성영향인소진행료계통연구，연구결과표명근거리매층군개채시，상층매주관도월대，항도월고근채공구，층간거월대，하층항도정판수력월소，월용역유호。대항도은정성적영향종대소의차위매주하방불동수평위치영향대우층간거영향대우매주관도영향。기우차，제출종항도포치、지호조시、예폭파상복매주등래해결겁근거리매층다채공구하항도적은정문제。
Aiming at the characteristics of many minable coal seams and close-distance layers in Lower Jurassic group in Datong mining area,a systemic research is conducted on the influence factors of the stability of the roadway under many gobs in ultra-close coal seams with numerical simulation?The research results show that during the mining of the close-distance coal seam group,when the width of the upper layer coal pillar is greater,and the roadway is closer to the gob,and interlayer spacing is greater,the lower roadway roof stress will be smaller and it will be easier to maintain the roadway?The influence of different level under the coal pillar on the road-way stability is greater than the interlayer spacing,which is greater than the width of coal pillar?Based on this,the paper lists some methods such as roadway layout,support measures,overly-ing coal pillar pre-blasting and so on to solve the stability problem of the roadway under many gobs in ultra-close coal seams?
