本文選題：雙巷布置 + 區(qū)段煤柱　； 參考：《中國礦業(yè)大學(xué)》2016年碩士論文

【摘要】：本論文以景福礦一采區(qū)雙巷布置工作面為工程背景,通過采用FLAC3D數(shù)值模擬方法對(duì)實(shí)體煤雙巷掘進(jìn)期間和兩次工作面回采期間的不同寬度煤柱圍巖應(yīng)力和塑性區(qū)分布進(jìn)行研究,得到了雙巷布置工作面合理的區(qū)段煤柱寬度,采用理論分析和數(shù)值模擬研究相結(jié)合的方法,提出了動(dòng)壓巷道圍巖控制技術(shù),確定了15101回風(fēng)順槽和15201進(jìn)風(fēng)順槽的錨桿(索)支護(hù)參數(shù)及補(bǔ)強(qiáng)方案。并在景福礦工程實(shí)踐中得到了成功應(yīng)用,取得了如下研究成果:(1)利用數(shù)值模擬方法分析了雙巷布置工作面巷道在不同寬度區(qū)段煤柱時(shí),分別經(jīng)歷雙巷掘進(jìn)相互影響階段、一次回采階段和二次回采階段這三個(gè)階段的采動(dòng)影響下,巷道圍巖的應(yīng)力和塑性區(qū)分布情況,綜合考慮這三個(gè)階段的應(yīng)力和塑性區(qū)分布規(guī)律,最終確定合理的區(qū)段煤柱寬度為7m。(2)在合理寬度區(qū)段煤柱條件下,采用理論方法對(duì)動(dòng)壓巷道的穩(wěn)定性進(jìn)行研究,分析了15201進(jìn)風(fēng)順槽在巷道掘進(jìn)、兩次工作面回采以及時(shí)間等因素的影響下,動(dòng)壓巷道圍巖受力特征和變形演化規(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)。(3)通過對(duì)動(dòng)壓巷道圍巖受力特征和變形規(guī)律的研究,基于錨桿支護(hù)對(duì)破碎煤巖體力學(xué)性能良好改善作用,且能夠很好的適應(yīng)巷道圍巖大變形的特點(diǎn),確定采用高強(qiáng)、高預(yù)應(yīng)力的錨桿(索)支護(hù)體系,運(yùn)用錨桿支護(hù)動(dòng)態(tài)系統(tǒng)設(shè)計(jì)方法,采用數(shù)值模擬分析方法結(jié)合景福礦具體生產(chǎn)地質(zhì)條件確定合理的巷道支護(hù)參數(shù),同時(shí),通過對(duì)15101工作面采動(dòng)應(yīng)力規(guī)律的分析,確定了相應(yīng)的加強(qiáng)支護(hù)方案。(4)上述研究成果在景福礦15201工作面獲得了成功應(yīng)用,并為以后類似條件下的礦井生產(chǎn)提供了參考和依據(jù)。
[Abstract]:In this paper, the distribution of surrounding rock stress and plastic zone of different widths of surrounding rock of coal pillar during driving and twice mining of solid coal double roadway is studied by using FLAC3D numerical simulation method, taking the double roadway layout in the first mining area of Jingfu Coal Mine as the engineering background. The reasonable section pillar width of double roadway layout face is obtained. By combining theoretical analysis and numerical simulation, the control technology of dynamic pressure roadway surrounding rock is put forward. The bolting parameters and reinforcement scheme of the 15101 return air trench and 15201 inlet wind channel are determined. It has been successfully applied in Jingfu mine engineering practice, and has obtained the following research results: 1) using numerical simulation method to analyze the interaction stage of double-roadway tunneling in different width sections of coal pillar. Under the influence of the first and second mining stages, the distribution of stress and plastic zone in surrounding rock of roadway is considered synthetically, and the distribution of stress and plastic zone in these three stages is considered synthetically. Finally, it is determined that the reasonable section pillar width is 7m.m-2) under the condition of reasonable width coal pillar, the stability of dynamic pressure roadway is studied by theoretical method. Under the influence of mining and time, the stress characteristics and deformation evolution of surrounding rock in dynamic pressure roadway are analyzed, and the loading and unloading principle of surrounding rock is put forward. Based on the study of the mechanical characteristics and deformation law of surrounding rock in dynamic pressure roadway, based on the good improvement of mechanical properties of broken coal and rock mass by bolting support, this paper provides a theoretical basis for the control technology of surrounding rock. And it can adapt to the characteristics of large deformation of roadway surrounding rock, and adopt the high strength and high prestress bolt (cable) support system, and use the dynamic system design method of bolt support. The reasonable supporting parameters of roadway are determined by using numerical simulation analysis method combined with the concrete geological conditions of Jingfu Mine. At the same time, through the analysis of mining stress law of 15101 face, The above research results have been successfully applied in 15201 face of Jingfu Coal Mine, and have provided reference and basis for mine production 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】：2016
【分類號(hào)】：TD353

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本文編號(hào)：1882187