再生顶板下巷道布置及支护离散元模拟

发布时间：2018-01-29 06:46

本文关键词： 再生顶板巷道布置留顶厚度 voronoi块体划分锚杆支护　出处：《辽宁工程技术大学学报(自然科学版)》2016年09期 　论文类型：期刊论文

【摘要】：为确定再生顶板下巷道掘进合理位置及支护形式,考虑再生顶板的形成过程及特点,以UDEC数值模拟为主要研究手段,采用voronoi块体划分方法,建立了再生顶板下巷道布置及支护模型,分别对再生顶板下不同位置、不同留顶厚度及不同支护形式下的巷道开挖进行了模拟.结果表明:再生顶板下巷道顶板中的垂直应力一般小于原岩垂直应力,平均为原岩垂直应力的0.6倍;再生顶板下巷道布置宜选用内错布置,内错距离为3~6 m;巷道合理留顶厚度为0.8 m以上;巷道支护形式宜采用锚杆与架棚及喷浆联合支护,必要时可进行超前注浆加固.
[Abstract]:In order to determine the reasonable position and supporting form of roadway driving under regenerated roof, considering the forming process and characteristics of regenerated roof, UDEC numerical simulation was used as the main research means, and voronoi block partition method was adopted. The layout and support model of roadway under regenerative roof are established, and the different positions under regenerated roof are respectively set up. The excavation of roadway with different retaining thickness and different supporting forms is simulated. The results show that the vertical stress in the roof of the roadway under the regenerated roof is generally smaller than that in the original rock. The average vertical stress of the original rock is 0.6 times that of the original rock. The layout of roadway under regenerative roof should be arranged with internal fault, and the distance of internal dislocation is 3 ~ 6 m; The reasonable roof thickness of roadway is more than 0.8 m; The supporting form of roadway should be combined with bolting, frame shed and shotcreting, and if necessary, it can be strengthened by advanced grouting.
【作者单位】：山东科技大学矿业与安全工程学院;山东能源龙矿集团北皂煤矿;
【基金】：国家自然科学基金(51379116)(51474136) 山东省重点研发计划(2015GSF116012) 山东科技大学研究生科技创新基金(YC150202)
【分类号】：TD353
【正文快照】： 0引言在没有铺设人工假顶的情况下,残余下分层煤层复采顶板稳定性较差,在该类顶板下掘进巷道的位置及支护形式的选择,有重要工程意义.王鹏飞[1]等采用错层位巷道布置,在上区段压实采空区下部内错布置下区段巷道,使巷道处于应力显著降低区。权景伟[2]等对采空区下留3 m厚顶煤掘

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