本文選題：動(dòng)壓巷道 + 失穩(wěn)機(jī)理��； 參考：《中國礦業(yè)大學(xué)》2015年碩士論文

【摘要】：動(dòng)壓巷道圍巖控制一直是煤礦安全生產(chǎn)必不可少的研究課題,針對(duì)此問題已有很多研究,主要包括三個(gè)方面:(1)改善巷道圍巖本身的物理力學(xué)性質(zhì);(2)改善巷道圍巖的應(yīng)力分布狀態(tài);(3)加強(qiáng)巷道圍巖支護(hù)強(qiáng)度。研究科學(xué)合理的動(dòng)壓巷道圍巖控制技術(shù),不僅可以保證煤礦安全生產(chǎn),而且可以緩解日趨嚴(yán)重的煤炭資源形勢(shì)。本文針對(duì)新元煤礦3107回風(fēng)巷特有的生產(chǎn)地質(zhì)條件,為能有效的保持巷道圍巖的穩(wěn)定,采用理論分析、數(shù)值計(jì)算結(jié)合工業(yè)性試驗(yàn)的研究手段,取得了以下5個(gè)方面的研究結(jié)論:(1)通過從巷道圍巖巖性、巷道圍巖應(yīng)力分布及巷道支護(hù)強(qiáng)度三個(gè)方面分析動(dòng)壓巷道圍巖失穩(wěn)機(jī)理,得出軟巖巷道變形規(guī)律及破壞特征及不同煤柱寬度時(shí)圍巖應(yīng)力分布特征。(2)通過留巷卸壓技術(shù),改善試驗(yàn)巷道圍巖應(yīng)力環(huán)境。經(jīng)數(shù)值模擬分析比較了留巷卸壓前后試驗(yàn)巷道煤柱應(yīng)力分布,巷道圍巖塑性區(qū),巷道圍巖變形特征,最終證實(shí)留巷卸壓的有效與合理性。(3)根據(jù)試驗(yàn)巷道變形特點(diǎn),通過數(shù)值模擬與理論分析,提出了針對(duì)性的巷道圍巖變形控制措施,包括:幫部錨索,底角錨桿,高預(yù)緊力、大延伸率錨桿的使用,并通過現(xiàn)場(chǎng)實(shí)踐證明其有效性。(4)根據(jù)試驗(yàn)巷道變形特點(diǎn),通過數(shù)值模擬對(duì)試驗(yàn)巷道錨桿支護(hù)參數(shù)進(jìn)行了優(yōu)化設(shè)計(jì),并通過現(xiàn)場(chǎng)實(shí)踐證明此參數(shù)能滿足安全生產(chǎn)要求。(5)通過現(xiàn)場(chǎng)礦壓觀測(cè),證明本文設(shè)計(jì)的一系列圍巖控制技術(shù)能有效的控制巷道圍巖變形,滿足生產(chǎn)要求,經(jīng)濟(jì)和社會(huì)效益顯著。
[Abstract]:Dynamic pressure roadway surrounding rock control has always been an indispensable research topic in coal mine safety production, in view of this problem, a lot of research has been done. It mainly includes three aspects: (1) to improve the physical and mechanical properties of roadway surrounding rock; (2) to improve the stress distribution of roadway surrounding rock; (3) to strengthen the supporting strength of roadway surrounding rock. The study of scientific and reasonable control technology of surrounding rock in dynamic pressure roadway can not only ensure the safety of coal production, but also alleviate the increasingly serious situation of coal resources. In view of the special production geological conditions of 3107 return air roadway in Xinyuan Coal Mine, in order to effectively maintain the stability of surrounding rock of roadway, this paper adopts theoretical analysis and numerical calculation combined with the research means of industrial test. The conclusions are as follows: (1) the mechanism of rock instability in dynamic pressure roadway is analyzed from three aspects: lithology, stress distribution and support strength. The deformation and failure characteristics of soft rock roadway and the stress distribution characteristics of surrounding rock under different coal pillar widths are obtained. (2) the stress environment of surrounding rock in test roadway is improved by the technique of retaining roadway pressure relief. The stress distribution of coal pillar, plastic zone of surrounding rock and deformation characteristics of surrounding rock of roadway before and after decompression of roadway are analyzed and compared by numerical simulation. Finally, the validity and rationality of unloading pressure in roadway are proved. (3) according to the deformation characteristics of test roadway, Through numerical simulation and theoretical analysis, the paper puts forward the corresponding measures for controlling the surrounding rock deformation of roadway, including the use of anchor cable, anchor rod at bottom angle, high pretightening force and high elongation anchor. It is proved to be effective by field practice. (4) according to the deformation characteristics of test roadway, the parameters of bolting support in test roadway are optimized by numerical simulation. It is proved by field practice that this parameter can meet the requirements of safety production. (5) through field observation of rock pressure, it is proved that a series of surrounding rock control techniques designed in this paper can effectively control the surrounding rock deformation of roadway, meet the production requirements, and have remarkable economic and social benefits.
【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】：2015
【分類號(hào)】：TD353

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本文編號(hào)：2089307