【摘要】：當(dāng)前我國綜掘巷道掘進(jìn)過程中冒頂、片幫事故常有發(fā)生,特別是在掘進(jìn)工作面端頭施工過程中發(fā)生頻率很高,長(zhǎng)期以來困擾著煤炭工人的生命安全以及煤炭企業(yè)的正常生產(chǎn)。研究綜掘巷道支架與圍巖相互作用關(guān)系,對(duì)于支架選型、有效控制頂板變形、保證采掘交替高效生產(chǎn),具有十分重要的理論和實(shí)踐意義。 本文以潞安集團(tuán)王莊煤礦7103綜掘工作面為實(shí)際工程背景,分別從采區(qū)地質(zhì)條件、超前支架結(jié)構(gòu)以及合理支護(hù)強(qiáng)度、煤壁冒頂片幫機(jī)理,通過現(xiàn)場(chǎng)收集資料、理論分析、數(shù)值模擬、井下工業(yè)性試驗(yàn)等方法,對(duì)綜掘巷道超前支架與圍巖相互作用進(jìn)行了深入的研究。 首先,根據(jù)王莊礦7103綜掘工作面地質(zhì)力學(xué)參數(shù),通過對(duì)比多種不同的計(jì)算推導(dǎo),確立了符合7103綜掘工作面合理的支護(hù)強(qiáng)度,為工作面安全生產(chǎn)提供保障。同時(shí)展開了應(yīng)用新型超前支護(hù)裝置下施工工藝的分析,為采掘交替的正規(guī)循環(huán)提供了依據(jù)。 其次,從理論上結(jié)合廣義Mises準(zhǔn)則,在考慮中主應(yīng)力的情況下,確立了煤壁塑性區(qū)寬度計(jì)算公式。通過數(shù)值模擬,展開了巷道尺寸變化對(duì)圍巖穩(wěn)定性影響的研究、展開了ZJC2×1040/30/42超前支架在7103綜掘工作面的適應(yīng)性研究、展開了在不同圍巖條件下超前支架的適應(yīng)性研究、展開了綜掘巷道應(yīng)用錨桿錨索的數(shù)值模擬研究。 最后,在王莊礦6183運(yùn)巷和7103運(yùn)巷2個(gè)綜掘工作面開展井下工業(yè)性試驗(yàn)。試驗(yàn)表明：ZJC2×1040/30/42超前支架具有可靠性高、結(jié)構(gòu)簡(jiǎn)單、支撐力強(qiáng)、覆蓋面積廣、操作簡(jiǎn)單、針對(duì)不同地質(zhì)條件適應(yīng)能力強(qiáng)等特點(diǎn)。在整個(gè)工業(yè)性試驗(yàn)期間,該超前支護(hù)裝置與綜掘面其它設(shè)備之間配套合理,采掘正規(guī)循環(huán)率高,超過原綜掘10%以上。在應(yīng)用該超前支護(hù)的工作面安全環(huán)境得到了極大改善,工人在有保護(hù)的頂板條件下工作,不僅增強(qiáng)了工人的安全感,同時(shí)也提高了工作效率,整個(gè)實(shí)驗(yàn)期間內(nèi)安全事故為零。
[Abstract]:At present, the roof fall in the driving process of the fully mechanized roadway in our country, the accident of sheet side often occurs, especially in the construction process of the end of the heading face, the frequency is very high, which has been puzzling the life safety of the coal workers and the normal production of the coal enterprise for a long time. It is of great theoretical and practical significance to study the interaction between support and surrounding rock in fully mechanized roadway. It is of great theoretical and practical significance for the selection of support, the effective control of roof deformation and the guarantee of alternate and efficient production of mining and excavation. Taking the 7103 fully mechanized excavation face of Wangzhuang Coal Mine of Lu'an Group as the actual engineering background, this paper analyzes the geological conditions of the mining area, the structure of the leading support, the reasonable supporting strength, the mechanism of roof fall of coal wall, and the data collected on the spot. Numerical simulation and underground industrial test are used to study the interaction between advance support and surrounding rock in fully mechanized roadway. Firstly, according to the geological and mechanical parameters of No. 7103 fully mechanized excavation face in Wangzhuang Mine, the reasonable supporting strength of 7103 fully mechanized working face is established by comparing various calculation and derivation, which provides guarantee for safe production of working face. At the same time, the analysis of the construction technology under the application of the new advanced support device is carried out, which provides the basis for the regular cycle of mining and excavation alternations. Secondly, the formula for calculating the width of plastic zone of coal wall is established by combining with the generalized Mises criterion and taking into account the medium principal stress. Through numerical simulation, the influence of tunnel size change on the stability of surrounding rock is studied, the adaptability of ZJC2 脳 1040-30-42 leading support in 7103 fully mechanized excavation face is studied, and the adaptability of advance support under different surrounding rock conditions is studied. The numerical simulation of anchor cable used in fully mechanized roadway is carried out. Finally, the underground industrial test was carried out in two fully mechanized driving faces of Wangzhuang Mine, 6183 roadway and 7103 roadway. The test results show that: ZJ _ 2 脳 1040-30-42 advanced support has the characteristics of high reliability, simple structure, strong support, wide coverage, simple operation and strong adaptability to different geological conditions. During the whole industrial test period, the supporting device is reasonable with other equipment for fully mechanized excavation, and the normal circulation rate of mining is high, which is more than 10% higher than that of the original fully mechanized excavation. The safety environment of the working face with advanced support has been greatly improved. The workers working under the protected roof condition not only enhance the sense of security of the workers, but also improve the working efficiency. The safety accident is zero during the whole experiment period.
【學(xué)位授予單位】：北方工業(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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