發(fā)布時(shí)間：2018-01-01 00:14

  本文關(guān)鍵詞：沖擊煤層煤柱變形與地面建筑物保護(hù)關(guān)系研究　出處：《巖土工程學(xué)報(bào)》2016年08期 　論文類型：期刊論文

  更多相關(guān)文章： 采礦工程 沖擊煤層 煤柱變形 覆巖空間結(jié)構(gòu) 沖擊失穩(wěn) 均勻變形

【摘要】：保護(hù)煤柱合理寬度(或停采位置)是確保地面重要設(shè)施長期穩(wěn)定的關(guān)鍵。以山東某礦地面引水渠("南水北調(diào)"工程組成部分)下不規(guī)則下山保護(hù)煤柱寬度設(shè)計(jì)為工程背景,首先,通過分析煤柱變形可能引起地面建(構(gòu))筑物的破壞方式,提出了控制長期高應(yīng)力作用下沖擊煤層煤柱變形的原則:1走向方向煤柱不發(fā)生沖擊失穩(wěn)破壞;2走向方向煤柱不發(fā)生煤體長時(shí)強(qiáng)度降低而導(dǎo)致的失穩(wěn)破壞;3傾斜方向煤柱保持均勻變形,從而使地面不發(fā)生明顯拉伸破壞。其次,依據(jù)煤柱上方覆巖空間結(jié)構(gòu)形式,建立了煤柱應(yīng)力估算模型,提出了保持煤柱長期穩(wěn)定及地面建筑安全的煤柱設(shè)計(jì)方法。最后,應(yīng)用研究成果,分析了工程案例的煤柱應(yīng)力、圍巖穩(wěn)定性和變形特征,并對(duì)該引水渠工程和井下開采設(shè)計(jì)進(jìn)行了安全評(píng)估。該研究成果對(duì)類似開采條件下的保護(hù)煤柱寬度確定具有指導(dǎo)意義。
[Abstract]:To protect the reasonable width of coal pillar (or stop mining position) is the key to ensure the long-term stability of important ground facilities. Under the irregular downhill protection pillar width design for the engineering background. First of all, through the analysis of the deformation of coal pillar may cause the ground building (construction) damage mode. The principle of controlling the deformation of coal pillar in impact coal seam under the action of long-term high stress is put forward. (2) in the direction of strike direction, the instability of coal pillar does not occur due to the reduction of long term strength of coal body; (3) the coal pillar in the inclined direction keeps uniform deformation, so that no obvious tensile damage occurs on the ground. Secondly, according to the spatial structure form of overburden rock above the coal pillar, a model for estimating the stress of coal pillar is established. The design method of coal pillar is put forward to keep the long-term stability of coal pillar and safety of ground building. Finally, the characteristics of stress, surrounding rock stability and deformation of coal pillar in engineering cases are analyzed by applying the research results. The safety evaluation of the canal project and the downhole mining design is also carried out. The research results are of guiding significance for the determination of the width of coal pillar protection under similar mining conditions.
【作者單位】： 北京科技大學(xué)金屬礦山高效開采與安全教育部重點(diǎn)實(shí)驗(yàn)室;山東能源集團(tuán)有限公司;棗莊礦業(yè)集團(tuán)高莊煤業(yè)有限公司;
【基金】：國家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃(“973”計(jì)劃)項(xiàng)目(2010CB226803) 國家自然科學(xué)基金項(xiàng)目(51274022,51174016)
【分類號(hào)】：TD324
【正文快照】： Relationship between deformation of coal pillars in coal seam with rockbursthazards and protection of surface buildingsZHANG Ming1,JIANG Fu-xing1,LI Ke-qing1,ZHAI Ming-hua2,MIAO Chuan-kao3,YANG Gen-di3,0引言“南水北調(diào)”工程是中國的“百年大計(jì)”和世紀(jì)工程,，

本文編號(hào)：1362082