發(fā)布時(shí)間：2018-02-26 03:36

  本文關(guān)鍵詞： 突出危險(xiǎn)煤層群 卸壓瓦斯抽采 指標(biāo)體系 可靠性　出處：《中國(guó)礦業(yè)大學(xué)》2013年博士論文　論文類(lèi)型：學(xué)位論文

【摘要】：針對(duì)我國(guó)瓦斯動(dòng)力災(zāi)害事故的嚴(yán)重性和近年來(lái)保護(hù)層開(kāi)采與卸壓瓦斯抽采技術(shù)發(fā)展趨勢(shì)，本文以巖體力學(xué)、彈性力學(xué)等基礎(chǔ)理論為指導(dǎo)，以數(shù)值模擬、現(xiàn)場(chǎng)考察等方法為途徑，對(duì)煤層群條件下保護(hù)層開(kāi)采后其上覆和下伏煤巖體應(yīng)力分布規(guī)律、裂隙發(fā)育演化過(guò)程展開(kāi)了較為全面的理論研究。在理論研究的基礎(chǔ)上，對(duì)當(dāng)前卸壓瓦斯抽采方法進(jìn)行了總結(jié)優(yōu)化，構(gòu)建了保護(hù)層開(kāi)采及卸壓瓦斯抽采技術(shù)的評(píng)價(jià)指標(biāo)體系，，同時(shí)對(duì)保護(hù)層開(kāi)采及卸壓瓦斯抽采技術(shù)的可靠性和過(guò)程控制技術(shù)進(jìn)行了初步研究。論文的研究?jī)?nèi)容對(duì)煤層群條件下保護(hù)層開(kāi)采及卸壓瓦斯抽采技術(shù)的實(shí)際運(yùn)用有重要理論指導(dǎo)意義。 論文研究了不同保護(hù)層層位條件下，頂?shù)装鍑鷰r應(yīng)力與圍巖移動(dòng)變形隨開(kāi)采長(zhǎng)度及層間距的變化規(guī)律。在理論研究的基礎(chǔ)上，結(jié)合卸壓瓦斯抽采技術(shù)的發(fā)展和應(yīng)用實(shí)例，分析各瓦斯抽采模式具體應(yīng)用下的基本煤層地質(zhì)條件、卸壓瓦斯抽采效果及開(kāi)采驗(yàn)證情況，優(yōu)化了瓦斯抽采方法和工藝參數(shù)，總結(jié)獲得各抽采模式的適用條件，為瓦斯治理工程的總體設(shè)計(jì)規(guī)劃提供例證和參考。 基于保護(hù)層開(kāi)采及卸壓瓦斯抽采技術(shù)工藝流程特點(diǎn)，對(duì)方案設(shè)計(jì)、瓦斯抽采、效果檢驗(yàn)和效果驗(yàn)證四個(gè)環(huán)節(jié)，提出了“基本指標(biāo)”、“瓦斯抽采參數(shù)設(shè)計(jì)指標(biāo)”、“保護(hù)范圍劃定指標(biāo)”、“卸壓增透效果指標(biāo)”、“瓦斯抽采效果指標(biāo)”、“效果檢驗(yàn)指標(biāo)”和“效果驗(yàn)證指標(biāo)”7個(gè)一級(jí)指標(biāo)，其下又涵蓋了20個(gè)二級(jí)指標(biāo)。在大量現(xiàn)場(chǎng)統(tǒng)計(jì)數(shù)據(jù)的基礎(chǔ)上，確立了相應(yīng)的指標(biāo)臨界值，構(gòu)建了保護(hù)層開(kāi)采指標(biāo)體系，為保護(hù)層開(kāi)采及卸壓瓦斯抽采的設(shè)計(jì)、瓦斯抽采、效果評(píng)價(jià)、保護(hù)范圍的劃定、可靠性評(píng)價(jià)和防突過(guò)程控制提供了科學(xué)依據(jù)。 創(chuàng)新性的將可靠性理論引入保護(hù)層開(kāi)采技術(shù)應(yīng)用中，歸納了七類(lèi)影響保護(hù)層開(kāi)采技術(shù)可靠性的主要因素，提出相應(yīng)的評(píng)價(jià)指標(biāo)，建立了由目標(biāo)層，準(zhǔn)則層和子準(zhǔn)則層構(gòu)成的可靠性評(píng)價(jià)體系�；趯哟畏治龇ɑ纠碚摚ㄟ^(guò)構(gòu)造判斷矩陣計(jì)算各層次指標(biāo)重要性權(quán)重的方法。并將計(jì)算結(jié)果，按其對(duì)可靠性影響的重要度分為“重要”（權(quán)重值≥0.06）、“較重要”（0.03≤權(quán)重值＜0.06）和“一般”（權(quán)重值＜0.03）三個(gè)層次。其中，“被保護(hù)層瓦斯抽采設(shè)計(jì)”、“卸壓瓦斯抽采程度”、“煤柱留設(shè)”、“未保護(hù)區(qū)管理”和“防突過(guò)程控制”5項(xiàng)指標(biāo)屬于“重要”指標(biāo)，可對(duì)提高保護(hù)層開(kāi)采技術(shù)的可靠性產(chǎn)生直接影響，需特別關(guān)注。 最后以現(xiàn)有煤礦瓦斯治理模式特點(diǎn)為基礎(chǔ)，引入過(guò)程控制的概念，構(gòu)建了煤礦瓦斯治理總過(guò)程模型及典型子過(guò)程模型，提出瓦斯治理過(guò)程各參數(shù)的跟蹤控制方法，并將瓦斯治理過(guò)程控制智能系統(tǒng)應(yīng)用于祁南煤礦的713工作面掘進(jìn)過(guò)程中的過(guò)程控制，取得了較好的效果，初步實(shí)現(xiàn)了瓦斯治理過(guò)程的規(guī)范化和程序化。
[Abstract]:In view of the severity of gas dynamic disasters in China and the development trend of protective layer mining and pressure relief gas extraction technology in recent years, this paper is guided by the basic theories of rock mechanics, elastic mechanics, numerical simulation, field investigation and so on. In this paper, the stress distribution law of overlying and underlying coal and rock mass and the process of fracture development and evolution under the condition of coal seam group mining are studied in a more comprehensive way. This paper summarizes and optimizes the current method of unpressurized gas extraction, and constructs the evaluation index system of protective layer mining and pressure relief gas drainage technology. At the same time, the reliability and process control technology of protective layer mining and pressure-relief gas drainage technology are studied preliminarily. The practical application of protective layer mining and pressure-relief gas drainage technology under the condition of coal seam group is discussed in this paper. Important theoretical guidance significance. In this paper, the variation of surrounding rock stress and surrounding rock movement and deformation with mining length and interval under different protection layers is studied. On the basis of theoretical research, the development and application of pressure relief gas extraction technology are discussed. This paper analyzes the basic coal seam geological conditions under the specific application of each gas drainage mode, the effect of gas extraction under pressure relief and the mining verification, optimizes the gas drainage methods and technological parameters, and summarizes the applicable conditions of each drainage mode. To provide examples and references for the overall design planning of gas control project. Based on the technical process characteristics of protective layer mining and pressure relief gas extraction, four links, including scheme design, gas drainage, effect test and effect verification, are introduced. The paper puts forward seven first class indexes such as "basic index", "parameter design index of gas drainage", "index of delineation of protection scope", "index of anti-permeability effect of pressure relief", "index of effect of gas drainage", "index of effect test" and "index of effect verification". On the basis of a large number of field statistical data, the critical value of relevant indexes is established, and the index system of protective layer mining is constructed, which is used for the design of protective layer mining and pressure-relief gas drainage. Evaluation of effect, delineation of protection range, reliability evaluation and control of anti-outburst process provide scientific basis. This paper introduces the reliability theory into the application of protective layer mining technology, sums up seven kinds of main factors that affect the reliability of protective layer mining technology, puts forward the corresponding evaluation index, and establishes the target layer. Based on the basic theory of Analytic hierarchy process (AHP), the method of calculating the importance weight of indexes at each level by constructing judgment matrix is presented. According to the importance degree of its influence on reliability, it can be divided into three levels: "important" (weight value 鈮

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