Cable-truss supporting system for gob-side entry driving in deep mine and its application

来源 :International Journal of Mining Science and Technology | 被引量 : 0次 | 上传用户:soboy1759
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
In order to solve the large deformation controlling problem for surrounding rock of gob-side entry driving under common cable anchor support in deep mine, site survey, physical modeling experiment, numerical simulation and field measurement were synthetically used to analyze the deformation and failure characteristics of surrounding rock. Besides, applicability analysis, prestress field distribution characteristics of surrounding rock and the control effect on large deformation of surrounding rock were also further studied for the gob-side entry driving in deep mine using the cable-truss supporting system. The results show that, first, compared with no support and traditional bolt anchor support, roof cable-truss system can effectively restrain the initiation and propagation of tensile cracks in the roof surrounding rock and arc shear cracks in the two sides, moreover, the broken development of surrounding rock, roof separation and extrusion deformation between the two sides of the roadway are all controlled; second, a prestressed belt of trapezoidal shape is generated in the surrounding rock by the cable-truss supporting system, and the prestress field range is wide. Especially, the prestress concentration belt in the shallow surrounding rock can greatly improve the anchoring strength and deformation resisting capability of the rock stratum;third, an optimized support system of ‘‘roof and side anchor net beam, roof cable-truss supporting system and anchor cable of the narrow coal pillar“ was put forward, and the support optimization design and field industrial test were conducted for the gob-side entry driving of the working face 5302 in Tangkou Mine, from which a good supporting effect was obtained. In order to solve the large deformation controlling problem for surrounding rock of gob-side entry driving under common cable anchor support in deep mine, site survey, physical modeling experiment, numerical simulation and field measurement were synthetically used to analyze the deformation and failure characteristics of surrounding rock. Besides, applicability analysis, prestress field distribution characteristics of surrounding rock and the control effect on large deformation of surrounding rock were also studied for the gob-side entry driving in the deep mine using the cable-truss supporting system. The results show that, first, compared with no support and traditional bolt anchor support, roof cable-truss system can effectively restrain the initiation and propagation of tensile cracks in the roof surrounding rock and arc shear cracks in the two sides, moreover, the broken development of surrounding rock, roof separation and extrusion deformation between the two sides of the roa dway are all controlled; second, a prestressed concentration of belt in trapezoidal shape is generated in the surrounding rock by the cable-truss supporting system, and the prestress field range is wide. Especially, the prestress concentration belt in the shallow surrounding rock can greatly improve the anchoring strength and deformation resisting capability of the rock stratum; third, an optimized support system of ’’ roof and side anchor net beam, roof cable-truss supporting system and anchor cable of the narrow coal pillar ”" was put forward, and the support optimization design and field industrial test were conducted for the gob-side entry driving of the working face 5302 in Tangkou Mine, from which a good supporting effect was obtained.
其他文献
在机械日常工作中,时常会出现各种故障,导致故障的原因有很多,例如机械故障、电气故障等,在液压设备中,由于油液处于流动状态,在系统中不易被观察,因此一旦发生故障,很难找到
In order to improve the recovery rate of coal, some mines have begun to recover the residual protective pillars in the form of short wall faces. However, it is
期刊
期刊
期刊
该文从挂篮荷载计算、施工流程、支座及临时固结施工、挂篮安装及试验、合拢段施工、模板制作安装、钢筋安装、混凝土的浇筑及养生、测量监控等方面人手,介绍了S226海滨大桥
介绍伺服液位计的概况、工作原理.介绍公司球罐区伺服液位计现状,并详细介绍如何自主更换测量钢丝和浮球、自主校验、自主故障处理.
阮郎归  曾 觌  柳阴庭院占风光,呢喃清昼长。碧波新涨小池塘,双双蹴水忙。  萍散漫,絮飘飏,轻盈体态狂。为怜流去落红香,衔将归画梁。    赏析  据周密《武林旧事》卷七记载,高宗、孝宗、乾道三年(公元1167年)三月初十,宋孝宗陪太上皇宋高宗,至后苑赏花,“回至清妍亭看茶蘼,就登御舟,绕堤闲游。(太上皇)倚阑闲看,适有双燕掠水飞过,传旨令曾觌赋之,遂进《阮郎归》”。可见这是奉旨填词。  邹祇
上海天强管理咨询有限公司总经理祝波善:rn面对新挑战须厘清三个“不等于”rn从去年下半年开始,业内单位已经感觉到一些压力,今年上半年压力更大,甚至在某些单位、某些细分行
为借鉴日本在钢结构住宅产业化的做法和经验,推动我国的钢结构住宅产业化的研究和产品的研发进程.应日本铁骨评价中心邀请,2012年5月中旬,由中国建筑金属结构协会会长姚兵带
期刊