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软岩岩层厚度、刚度和水平应力对关键层应力的影响
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作者 王平 朱永建 余伟健 《矿业工程研究》 2012年第2期5-9,共5页
为了进一步研究采场上覆岩层的移动规律,对影响关键层上载荷分布的因素进行分析.采用FLAC如软件模拟了不同的软岩岩层厚度、刚度和水平应力对关键层上载荷峰值的影响.通过模拟,发现关键层上覆软岩岩层的厚度、层刚度和水平应力对关键层... 为了进一步研究采场上覆岩层的移动规律,对影响关键层上载荷分布的因素进行分析.采用FLAC如软件模拟了不同的软岩岩层厚度、刚度和水平应力对关键层上载荷峰值的影响.通过模拟,发现关键层上覆软岩岩层的厚度、层刚度和水平应力对关键层的载荷峰值都有影响,且不同的水平应力在关键层破断前后会产生不同的影响.在初次来压前,水平应力加速了采空区的上方关键层的破断,但延缓了煤壁前方关键层的破断.初次来压后对关键层的破断影响很小.通过此次研究可以对关键层的破断以及采场的周期来压进行预测,对于采场覆岩的控制具有一定的指导意义. 展开更多
关键词 岩层控制 软岩岩层 关键层 正交试验 载荷峰值
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砌碹巷道通过软岩岩层的可行性办法
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作者 郑崎云 《煤》 2003年第5期30-31,共2页
根据锚杆支护的作用,阐述了砌碹巷道利用锚杆支护通过软岩岩层的特殊办法,为砌碹巷道通过软岩岩层提供了可行的依据。
关键词 砌碹巷道 软岩岩层 锚杆支护 作用原理 巷道施工
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松软、破碎岩层中箕斗装载硐室安全施工技术
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作者 徐建强 李令初 尚建岗 《山东煤炭科技》 2013年第4期114-115,共2页
文章介绍了邹庄煤矿主井箕斗装载硐室施工技术,施工中采用锚网棚索喷注一次支护,现浇钢筋混凝土二次支护,确保了工程质量和安全,为其它松软、破碎岩层施工大断面硐室积累了一定的经验。
关键词 破碎岩层 箕斗装载硐室 安全快速施工
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应用卸压控制法支护软岩巷道 被引量:1
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作者 段浓田 姜浩 《煤矿开采》 2000年第z1期44-46,共3页
软岩地层的围岩运动规律为早期快速变形以后逐渐减慢 ,早期压力大 ,特别在巷道达到一定的埋深后矿压显现更为明显 ,采用一次强力支护形式时的支护成本过高 ,采取先让后抗的支护方法 。
关键词 矿井深部 软岩岩层 卸压控制
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Numerical simulation for rheological characteristics of alternating distribution of soft and hard rock layers 被引量:1
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作者 韩冰 王芝银 +1 位作者 丁秀丽 徐平 《Journal of Coal Science & Engineering(China)》 2006年第1期1-5,共5页
The difficulty of selecting appropriate rheological model and parameters for the alternating distribution of soft and hard rock layers was often encountered due to the unhomogeneity, discontinuity and anisotropy of ro... The difficulty of selecting appropriate rheological model and parameters for the alternating distribution of soft and hard rock layers was often encountered due to the unhomogeneity, discontinuity and anisotropy of rock mass. The Burgers and generalized Kelvin models were applied to the soft and hard rock respectively and the rheological parameters were obtained based on the method of optimum separation. By using the simulated code FLAC^(3D), the stability of surrounding rocks of a certain underground plant was analyzed. The effect of surface load and weakening the parameters intensity of argillaceous and bioclastic interlayers between soft and hard rock on rheological behavior of layer composite rock mass was investigated. The results indicate that the rheological characteristics of soft and hard rock layer in composite rock mass can be described well with above two rheological models. 展开更多
关键词 alternating distribution of soft and hard layers RHEOLOGY numerical simulation
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Control technology and coordination deformation mechanism of rise entry group with high ground stress 被引量:4
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作者 Li Qingfeng Zhu Quanqu 《International Journal of Mining Science and Technology》 SCIE EI 2012年第3期429-435,共7页
Based on engineering practices of Wuyang Coal Mine, we carried out X-ray diffract researches on No. 3 coal; and the rocks of its roof and floor by XRD meter, and simulated the interactive effect of the surrounding roc... Based on engineering practices of Wuyang Coal Mine, we carried out X-ray diffract researches on No. 3 coal; and the rocks of its roof and floor by XRD meter, and simulated the interactive effect of the surrounding rock deformation by FLAC2DS.0 numerical simulation software under the condition of different tunneling method of multimine roadway in parallel. The internal structures of the surrounding rocks of 76 belt roadway were monitored by borehole observation instruments: and then, we analyzed the reason of fhilure and deformation of surrounding rocks of several rise entry, and proposed the technical mea- sures for controlling interactive effect of several rise entry surrounding rock deformation at last. For the thickness seam rise roadway, two conclusions were drawn: one is that the co-deformation among roadway groups mainly reflect on that both shear failure and deformation in coal pillar among roadways have decreased the width of pillar core region and clamping action of coal pillar to roof strata, increased the actual span of roof strata, intensified the flexural failure of roof strata and prized the bed separation of roof deep rock strata. The other conclusion is that the factors controlling the interactive deformation among roadways is obvious when appropriate re-adjustment in construction sequence of the tunneling of multimine parallel roadways because the construction sequence among roadways also has great effects on deformation of the surrounding rock in roadway. 展开更多
关键词 Several rise entryCoordination deformationNumerical simulationConstruction sequence
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