作　　者： ; ; ; ; ; ; ; ;

机构地区： 中国矿业大学资源与安全工程学院

出　　处： 《岩石力学与工程学报》 2013年第S2期3795-3803,共9页

摘　　要： 研究基于突出煤层连续卸压的近距下保护层合理开采展开。为确定被保护层开采的可行性与卸压效果,首先进行相似模拟试验并提出基于关键层理论的采场"三带"划分方法,结合实践数据确定被保护层在"三带"中的层位及相应的卸压效果,并对层间关键层以及保护层开采范围的影响进行分析。结合某矿开采煤2作为煤1保护层的工程实际,认为层间关键层在原设计工作面长度情况下会影响煤1沿倾向的卸压效果,提出在煤2中布置完全无煤柱搭接工作面,相应的裂隙带高度上升,相对降低煤1在裂隙带中的层位,卸压效果更充分,并且可以实现煤1沿倾向的连续以及反复卸压。最后,综合回采率和巷道工程量考虑,煤2采用无煤柱开采方案比原方案增加回采利润2.84亿元人民币;与5 m小煤柱沿空掘巷相比,减少岩巷工程费用计600万元人民币,增加回采利润1.4亿元人民币。因此,研究的结论具有一定技术与经济意义。 The research was basis of reasonable mining on the nether protective seam in inclined contiguous seams with continuous pressure-relief on outburst coal seam. In order to confirm the feasibility of mining protected seam and its pressure-relief effect,the similar simulation experiments initially were carried out and a division approach of“three zones”(caving zone,fractured zone and sagging zone) in stope was proposed based on the theory of key strata. Then,combined with field data,the position of protected seam in“three zones”and its pressure-relief effect can be determined;the effect of key strata between contiguous seams and the range of mining protective seam were eventually analyzed. Engineering practice,which coal seam #2 was mined as protective seam of coal seam #1,was taken as an example. Key strata between contiguous seams would affect pressure-relief effect in inclined direction in the case of original designed length of mining face;mining faces without overlap joint were assigned in coal seam #2,which made fractured zone increased,and also the level of coal seam #1 decreased in the fractured zone relatively,made pressure-relief effect more sufficient,and fulfilled pressure-relief in the direction of dip continuously and repeatedly. Finally,recovery ratio and engineering work of tunneling were considered,and compared with the original scheme of mining coal seam #2,he scheme with no pillars increases profit 0.284 billion RMB;and compared with gob-side entry driving with 5m small coal pillars,the scheme with no pillars decreases the cost of rock roadway 6 million RMB,and increases profit 0.14 billion RMB. Therefore,the research conclusions have certain technical and economic significance.

关 键 词： 采矿工程 倾斜煤层 近距离 保护层 卸压 突出煤层

领　　域： [矿业工程] [矿业工程] [矿业工程]