梧桐庄矿可缩自适应墩柱沿空留巷及充填料级配试验研究与应用

发布时间：2018-06-01 06:34

本文选题：沿空留巷 + 可缩自适应墩柱　；参考：《河北工程大学》2017年硕士论文

【摘要】：本文以冀中能源峰峰集团梧桐庄矿182208外工作面为工程研究背景,在考虑到现阶段梧桐矿工作面储煤量比较小,工作面搬家相对比较频繁且工作面的接替比较紧张,煤炭回采率不高等一系列问题,本文认为梧桐庄矿182208外工作面应采用无煤柱沿空留巷的开采方法,采用无煤柱沿空留巷的方案将能大大解决煤矿回采率低、吨煤成本高、工作面接替紧张、通风困难等问题。目前我国的沿空留巷技术已相对比较成熟,巷旁支护材料多种多样,通过综合煤矿实际情况及巷旁支护材料等方面的因素,本文自行提出了一种巷旁支护材料即可缩自适应墩柱。目前,沿空留巷巷旁支护体需在工作面后方进行构筑(如木垛、矸石袋、密集支柱、混凝土块和高水材料等),安全程度低、工人劳动强度大、且影响工作面的推进速度。因此,研究开发结构简单、施工安全、对工作面生产影响小、工人劳动强度低、可回收的巷旁支护体是推进该技术发展的关键。本文提出的可缩自适应墩柱即能解决目前面临的问题,然而可缩自适应墩柱能否发挥其支护作用的关键为充填墩柱石料的选取,本文通过实验室物理试验研究与数值模拟相结合的研究方法对墩柱内填充石料的级配的选取提供了充足的理论依据。课题以墩柱内充填石料级配的选取为研究,通过对墩柱内不同级配情况下充填料的支撑力、压缩量及墩柱壁的微变形量进行对比分析得到了适合的石料级配比例。合适的石料级配的选取既能提供足够支撑力来支护顶板又能满足其具备一定的可缩量来适应顶板下沉。结果证明了合适级配石料的选取既保证了沿空留巷的成功,也解决了煤矿开采及支护成本高的问题,为沿空留巷支护材料新方向提供了借鉴。
[Abstract]:In this paper, with the background of engineering research on the 182208 outer face of Wutongzhuang Coal Mine of Jizhong Energy Fengfeng Group, considering the relatively small amount of coal storage in the working face of Wutong Coal Mine at the present stage, the moving face is relatively frequent and the replacement of the working face is relatively tight. A series of problems such as low coal recovery rate are considered in this paper. It is believed that the mining method of no coal pillar along goaf retaining roadway should be adopted in 182208 outer face of Wutongzhuang Coal Mine, and the scheme of no coal pillar side goaf retaining roadway will solve the problem of low recovery rate and high ton coal cost. The face replaces the tension, the ventilation difficulty and so on question. At present, the technology of gob-side retaining in our country has been relatively mature, and there are a variety of supporting materials beside the roadway. Through synthesizing the actual situation of coal mine and the factors of roadway side support material, In this paper, a self-adaptive support material for roadway-side support is proposed. At present, the side support of roadway along goaf needs to be constructed behind the working face (such as wood pile, gangue bag, dense prop, concrete block and high water material, etc.), the safety degree is low, the worker's labor intensity is high, and the speed of working face is affected. Therefore, the research and development of simple structure, safe construction, small impact on the working face production, low labor intensity of workers, recoverable side support is the key to promote the development of the technology. The retractable adaptive pier column proposed in this paper can solve the current problems. However, the key to whether the self-adaptive pier pillar can play its supporting role is the selection of filling pillar stone. This paper provides sufficient theoretical basis for the selection of gradation of filled stone in piers by the combination of laboratory physical test and numerical simulation. In this paper, the selection of gradation of filling stone in pier column is studied, and the suitable proportion of stone gradation is obtained by comparing and analyzing the supporting force, compression quantity and micro-deformation of pier wall under the condition of different gradation in pier column. The proper selection of stone gradation can not only provide enough supporting force to support the roof, but also satisfy the certain amount of shrinkage to adapt to the roof subsidence. The results show that the selection of appropriate gradation stone not only ensures the success of gob retaining roadway, but also solves the problem of high mining and supporting cost in coal mine, and provides a reference for the new direction of supporting material along gob roadway.
【学位授予单位】：河北工程大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD353;TD823

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