本文選題：遺留煤柱 + 沿空留巷��； 參考：《中國礦業(yè)大學(xué)》2015年碩士論文

【摘要】：沿空留巷符合綠色采礦、科學(xué)采礦的發(fā)展方向,是一項(xiàng)很有前景的技術(shù)。遺留煤柱內(nèi)沿空留巷的圍巖受力和變形比較復(fù)雜。本文在前人研究的基礎(chǔ)上,綜合運(yùn)用理論分析、三維數(shù)值模擬計(jì)算、和工業(yè)性試驗(yàn)相結(jié)合的方法,深入的研究了遺留煤柱內(nèi)沿空留巷的特點(diǎn),提出了遺留煤柱內(nèi)沿空留巷圍巖控制技術(shù),并指導(dǎo)工程實(shí)踐應(yīng)用,取得了如下成果:研究了遺留煤柱內(nèi)沿空留巷兩側(cè)采空時(shí)頂板的破斷形式,得出了遺留煤柱穩(wěn)定的條件。利用數(shù)值模擬軟件分析了不同寬度遺留煤柱兩側(cè)采動(dòng)影響下,煤柱內(nèi)的塑性區(qū)和垂直應(yīng)力分布情況,從而得出垂直應(yīng)力呈“馬鞍形”分布時(shí)遺留煤柱處于穩(wěn)定狀態(tài),此時(shí)煤柱寬度為20m。然后通過理論計(jì)算的方式驗(yàn)證了20m遺留煤柱的合理性。在合理寬度遺留煤柱條件下,利用數(shù)值模擬軟件分析了兩個(gè)工作面回采時(shí),遺留煤柱在超前、滯后采動(dòng)影響下應(yīng)力應(yīng)變演化規(guī)律,提出了圍巖加卸載原理,為圍巖的控制技術(shù)提供理論依據(jù)。根據(jù)遺留煤柱內(nèi)沿空留巷圍巖的加卸載原理,確定采用高預(yù)緊力、高強(qiáng)錨桿與錨索支護(hù)體系作為沿空留巷的巷內(nèi)基本支護(hù)形式。同時(shí)根據(jù)沿空留巷圍巖的變形規(guī)律,提出了沿空留巷段加強(qiáng)支護(hù)技術(shù)方案,與巷內(nèi)支護(hù)共同維護(hù)圍巖的穩(wěn)定性。上述研究成果在沁新煤礦2203工作面運(yùn)輸順槽獲得了成功應(yīng)用,并為以后相似條件下的沿空留巷技術(shù)提供了參考和依據(jù)。
[Abstract]:It is a promising technology to keep the roadway along the gob in line with the development direction of green mining and scientific mining. The surrounding rock force and deformation of the roadway left along the gob in the left coal pillar are quite complex. On the basis of previous studies, this paper makes a thorough study of the characteristics of the coal pillar left along the gob by using the methods of theoretical analysis, three-dimensional numerical simulation and industrial test. This paper puts forward the control technology of surrounding rock along the gob retaining roadway in the left coal pillar, and instructs the engineering practice and application, and obtains the following achievements: the breakage form of roof in both sides of the coal pillar along the gob is studied, and the condition of the stability of the left coal pillar is obtained. By using numerical simulation software, the plastic zone and vertical stress distribution in the pillar under the influence of mining on both sides of the coal pillar with different widths are analyzed. It is concluded that the residual coal pillar is in a stable state when the vertical stress is "saddle-shaped" distribution. The width of coal pillar is 20m. Then the rationality of 20m coal pillar is verified by theoretical calculation. Under the condition of reasonable width of residual coal pillar, the evolution law of stress and strain under the influence of lead and lag of coal pillar in two mining face is analyzed by using numerical simulation software, and the principle of loading and unloading of surrounding rock is put forward. It provides a theoretical basis for the control technology of surrounding rock. According to the principle of loading and unloading of surrounding rock around gob retaining roadway in coal pillar, high pretightening force, high strength anchor rod and anchor cable supporting system are adopted as the basic supporting form of roadway along goaf. At the same time, according to the deformation law of the surrounding rock along the gob retaining roadway, the technical scheme of strengthening the support along the gob retaining section is put forward to maintain the stability of the surrounding rock together with the support in the roadway. The above research results have been successfully applied in the transportation of the smooth channel in Qinxin 2203 coal face, and have provided a reference and basis for the technology of gob-side retaining roadway under similar conditions in the future.
【學(xué)位授予單位】：中國礦業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TD353

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