本文選題：深埋煤層 + 條帶式��； 參考：《西安科技大學(xué)》2015年碩士論文

【摘要】：隨著我國(guó)經(jīng)濟(jì)的迅速發(fā)展,作為我國(guó)傳統(tǒng)能源的煤炭資源開(kāi)采規(guī)模日益增大,可采資源日趨減少,三下(建筑物下、鐵路下、水體下)呆滯煤又得不到合理開(kāi)采,這成為制約礦區(qū)可持續(xù)開(kāi)采和礦區(qū)生產(chǎn)穩(wěn)定發(fā)展的重要問(wèn)題。另外,礦區(qū)采出的矸石一般堆積在地面,使得土地資源被占用,且經(jīng)過(guò)長(zhǎng)期風(fēng)化,會(huì)造成環(huán)境污染。采取矸石充填開(kāi)采的方法,既可實(shí)現(xiàn)廢物再利用,又可作為地下結(jié)構(gòu)支撐體,從而達(dá)到控制地表沉陷、提高煤炭采出率、保護(hù)礦區(qū)生態(tài)環(huán)境、解放“三下”煤炭資源等目的。鑒于此,本文以陜西彬長(zhǎng)某礦深埋煤層充填開(kāi)采為工程依托,綜合運(yùn)用理論分析和數(shù)值模擬兩種研究方法,在分析合理開(kāi)采方式及充填工藝的基礎(chǔ)上,對(duì)深埋煤層矸石充填技術(shù)及上覆巖層穩(wěn)定性評(píng)價(jià)進(jìn)行研究,取得了具有一定價(jià)值的研究成果。主要結(jié)論如下:⑴通過(guò)分析房柱式開(kāi)采、條帶開(kāi)采、巷柱式開(kāi)采和刀柱式開(kāi)采的優(yōu)缺點(diǎn)和適用性,綜合考慮了適用性、穩(wěn)定性和經(jīng)濟(jì)性三方面因素,確定條帶式開(kāi)采為深埋煤層的最優(yōu)方式。通過(guò)合理安排開(kāi)采作業(yè)和充填作業(yè)順序,提出合理的開(kāi)采充填工藝和采煤運(yùn)輸系統(tǒng)的布置、充填運(yùn)輸系統(tǒng)的布置以及具體的運(yùn)輸作業(yè)方法。最后,確定符合現(xiàn)場(chǎng)實(shí)際情況的矸石充填堆棄工藝,分析影響矸石充填效果的因素,并提出了提高矸石充填效果以及與矸石充填相關(guān)的技術(shù)措施。⑵根據(jù)提出的條帶式開(kāi)采布置方式,選擇合理巷道和煤柱尺寸,深入分析了礦房煤柱布置中巷道寬度、巷間煤柱寬度和個(gè)數(shù)以及隔離煤柱寬度等參數(shù)之間的關(guān)系,計(jì)算出巷間煤柱和隔離煤柱的寬度及安全系數(shù);對(duì)開(kāi)采區(qū)間上方壓力拱穩(wěn)定性進(jìn)行了分析,認(rèn)為壓力拱拱腹和拱腳是其穩(wěn)定性的關(guān)鍵;根據(jù)條帶式開(kāi)采布置方式推導(dǎo)出開(kāi)采率和充填率的計(jì)算公式,并計(jì)算28種巷道和煤柱布置方案的開(kāi)采率和不同充填系數(shù)下的充填率。在此基礎(chǔ)上,根據(jù)煤柱和壓力拱穩(wěn)定性及開(kāi)采率和充填率等參數(shù)對(duì)28種礦房煤柱的布置方案進(jìn)行比選,確定了合理的布置方案。最后對(duì)彬長(zhǎng)礦區(qū)深埋煤層巷柱式開(kāi)采充填工藝配套的礦房煤柱進(jìn)行支護(hù)參數(shù)設(shè)計(jì),得到相應(yīng)的支護(hù)參數(shù)。⑶基于托板理論對(duì)深埋煤層條帶式開(kāi)采充填地表沉降進(jìn)行預(yù)測(cè),在保證上覆巖層穩(wěn)定的前提下,在各種巷柱開(kāi)采的布置方式中,運(yùn)用FLAC3D軟件進(jìn)行了充填開(kāi)采上覆巖層穩(wěn)定性的模擬計(jì)算,驗(yàn)證了預(yù)測(cè)理論的正確性。同時(shí),運(yùn)用FLAC3D軟件模擬對(duì)比分析了不同充填率下巷間煤柱與地層的受力及變形特征,對(duì)深埋煤層充填開(kāi)采上覆巖層穩(wěn)定性評(píng)價(jià)具有一定的參考價(jià)值。
[Abstract]:With the rapid development of our country's economy, the scale of mining coal resources as the traditional energy in our country is increasing day by day, the recoverable resources are decreasing day by day, and the stagnant coal (under buildings, railways, water bodies) can not be mined reasonably. This becomes the important problem that restricts the sustainable mining and the stable development of mining area. In addition, the gangue collected from the mining area generally accumulates on the ground, which causes the land resources to be occupied and weathered for a long time, which will cause environmental pollution. Adopting the method of waste filling mining can not only realize the reuse of waste, but also can be used as the support of underground structure, so as to control the surface subsidence, improve the coal extraction rate, protect the ecological environment of the mining area, and liberate the coal resources. In view of this, this paper based on the deep buried coal seam filling mining of a certain mine in Bingchang, Shaanxi province, synthetically used two kinds of research methods, theoretical analysis and numerical simulation, on the basis of analyzing reasonable mining method and filling technology. The technology of waste filling in deep buried coal seam and the evaluation of overlying strata stability are studied, and some valuable research results are obtained. The main conclusions are as follows: by analyzing the advantages and disadvantages and applicability of roof pillar mining, strip mining, roadway pillar mining and cutter pillar mining, the applicability, stability and economy are comprehensively considered. It is determined that strip mining is the best way of deep-buried coal seam. Through reasonable arrangement of mining operation and filling operation sequence, reasonable arrangement of mining and filling technology and coal mining transportation system, arrangement of filling transportation system and concrete transportation operation method are put forward. Finally, the waste process of waste filling is determined, and the factors that affect the filling effect of gangue are analyzed. The paper also puts forward the technical measures of improving the effect of gangue filling and the technical measures related to gangue filling. 2. According to the proposed strip mining layout, the reasonable roadway and coal pillar size are selected, and the width of roadway in the layout of coal pillar in mine house is deeply analyzed. The relationship between the width and number of coal pillars and the width of coal pillars between roadways, the width and safety factor of pillar and pillar between roadways are calculated, and the stability of pressure arch above mining section is analyzed. It is considered that the pressure arch and arch foot are the key to its stability, and the calculation formulas of mining rate and filling rate are derived according to the pattern of strip mining arrangement, and the mining rates of 28 kinds of roadways and coal pillar layout schemes and the filling rates under different filling coefficients are calculated. On the basis of this, according to the stability of coal pillar and pressure arch, mining rate and filling rate, the layout scheme of 28 kinds of coal pillar is compared and selected, and the reasonable layout scheme is determined. In the end, the supporting parameters of the coal pillar of the underground coal seam are designed, and the corresponding support parameter .3 is obtained to predict the ground subsidence of the deep buried coal seam by strip mining and filling based on the theory of supporting plate. On the premise of ensuring the stability of overburden strata, the simulation calculation of overburden strata stability of filling mining is carried out by using FLAC3D software in the arrangement of various roadway pillar mining, which verifies the correctness of the prediction theory. At the same time, the stress and deformation characteristics of coal pillar and strata between roadways under different filling rates are compared and analyzed by using FLAC3D software, which has a certain reference value for evaluating the stability of overlying strata in deep buried coal seam filling mining.
【學(xué)位授予單位】：西安科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TD823.7;TD325

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本文編號(hào)：1961103