發(fā)布時(shí)間：2018-05-04 02:01

  本文選題：高應(yīng)力 + 軟巖巷道　； 參考：《山東科技大學(xué)》2017年碩士論文

【摘要】：隨著開采深度的增加,深部高應(yīng)力軟巖巷道的支護(hù)問題已經(jīng)成為制約煤炭開采的重大問題之一,探索深部高應(yīng)力軟巖巷道變形破壞特征及圍巖控制機(jī)理對(duì)煤礦安全高效生產(chǎn)有著重要的意義。本文以星村煤礦為工程背景,針對(duì)星村煤礦生產(chǎn)時(shí)遇到的深部高應(yīng)力巷道的支護(hù)問題開展研究,通過室內(nèi)巖石力學(xué)實(shí)驗(yàn)測(cè)定了星村煤礦深部煤巖體的物理力學(xué)特性和主要的巖石力學(xué)參數(shù),并對(duì)礦區(qū)進(jìn)行了地應(yīng)力測(cè)量,分析礦區(qū)地應(yīng)力分布規(guī)律;研究了深部高應(yīng)力軟巖巷道圍巖的力學(xué)屬性,總結(jié)高應(yīng)力軟巖巷道圍巖變形破壞的特點(diǎn),在深部高應(yīng)力軟巖巷道支護(hù)原理的基礎(chǔ)上,通過巖石力學(xué)理論,闡述了高應(yīng)力軟巖巷道的最佳支護(hù)時(shí)間的力學(xué)含義,確定了在深部高應(yīng)力軟巖巷道中采用讓壓支護(hù)及二次支護(hù)技術(shù)控制圍巖變形的基本原則;運(yùn)用FLAC3D模擬二次支護(hù)對(duì)深部高應(yīng)力軟巖巷道圍巖的支護(hù)效果,通過數(shù)值計(jì)算模擬巷道圍巖應(yīng)力場(chǎng)、位移場(chǎng)及塑性區(qū)分布特征,對(duì)比分析了讓壓支護(hù)、大剛度支護(hù)及先一次讓壓后二次剛度支護(hù)對(duì)巷道圍巖控制機(jī)理,并通過模擬一次讓壓支護(hù)后不同時(shí)機(jī)施加二次支護(hù)對(duì)圍巖變形的控制效果,確定理論的最佳的二次支護(hù)時(shí)機(jī)。在星村煤礦-1196輔助進(jìn)風(fēng)大巷掘進(jìn)迎頭開挖巷道進(jìn)行了一次讓壓支護(hù)和二次大剛度支護(hù)的工業(yè)性試驗(yàn),并進(jìn)行了現(xiàn)場(chǎng)監(jiān)測(cè),結(jié)果表明,一次支護(hù)采用錨網(wǎng)噴的讓壓支護(hù)方式,二次支護(hù)采用錨網(wǎng)索噴的大剛度支護(hù)方式能有效控制巷道圍巖變形,保證圍巖長(zhǎng)期穩(wěn)定,達(dá)到工程上容易、經(jīng)濟(jì)上合理的支護(hù)效果,對(duì)指導(dǎo)深部高應(yīng)力軟巖巷道支護(hù)工程具有一定的實(shí)踐意義。
[Abstract]:With the increase of mining depth, the support problem of deep soft rock roadway with high stress has become one of the major problems restricting coal mining. It is of great significance to explore the deformation and failure characteristics of deep soft rock roadway under high stress and the control mechanism of surrounding rock for the safe and efficient production of coal mines. Taking Xingcun coal mine as the engineering background, this paper studies the support problem of deep high stress roadway in Xingcun coal mine. The physical and mechanical properties and main rock mechanics parameters of deep coal and rock mass in Xingcun Coal Mine are measured through laboratory rock mechanics experiments. The in-situ stress measurement is carried out and the distribution law of in-situ stress in the mining area is analyzed. In this paper, the mechanical properties of surrounding rock in deep soft rock roadway with high stress are studied, and the characteristics of deformation and failure of surrounding rock in soft rock roadway with high stress are summarized. On the basis of supporting principle of roadway with deep high stress and soft rock, rock mechanics theory is adopted. This paper expounds the mechanical meaning of the best supporting time of the soft rock roadway with high stress, and determines the basic principle of controlling the deformation of surrounding rock by means of the technology of compressing support and secondary support in the deep roadway of high stress soft rock. By using FLAC3D to simulate the supporting effect of surrounding rock of soft rock roadway with high stress, the stress field, displacement field and plastic zone distribution characteristics of surrounding rock of roadway are simulated numerically. The mechanism of controlling surrounding rock of roadway by large stiffness support and secondary stiffness support is obtained. By simulating the control effect of secondary support on the deformation of surrounding rock, the optimal time of secondary support is determined by simulating the control effect of secondary support on the deformation of surrounding rock by applying secondary support at different times. In Xingcun Coal Mine -1196 auxiliary wind entry roadway, the industrial test of pressure transfer support and secondary large stiffness support was carried out, and the results showed that the first support was supported by bolt-mesh shotcrete. The secondary support can effectively control the deformation of surrounding rock of roadway by bolting mesh and spraying with large stiffness, ensure the long-term stability of surrounding rock, and achieve easy and economical support effect in engineering. It has certain practical significance for guiding the support engineering of deep soft rock roadway with high stress.
【學(xué)位授予單位】：山東科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TD353

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本文編號(hào)：1841067