本文選題：高壓水射流　切入點：割縫防突　出處：《太原理工大學(xué)》2013年碩士論文

【摘要】：煤礦瓦斯治理關(guān)系安全生產(chǎn)大局,但在實踐中存在諸多的困難。有的煤層本身透氣性低,隨著作業(yè)深度的增加,瓦斯抽放的難度變大、成本提高,直接對安全生產(chǎn)構(gòu)成威脅。傳統(tǒng)的防治瓦斯突出問題的方法有很多,如采取提前爆破、鉆孔預(yù)抽、水力沖孔等,但都存在效率較低、影響掘進(jìn)速度等諸多問題。理論和實踐表明,采用高壓水射流在鉆孔內(nèi)割縫的新方法可以有效提高煤層的透氣性,這樣研制割縫設(shè)備就具有很大的實踐意義。 本文的研究對象就是太原理工大學(xué)多年來不斷研究改進(jìn)的割縫鉆機(jī)。該設(shè)備由液壓系統(tǒng)驅(qū)動將焊接起來的無縫鋼管纏繞在滾筒上,使設(shè)備具有較長的工作半徑。同時在行走、換向一系列機(jī)構(gòu)的輔助下完成井下作業(yè)的各個動作,實現(xiàn)割縫提高煤層透氣性的設(shè)計目的。其中焊接鋼管作為高壓水射流的通道,工作時伸出至掘進(jìn)工作面,工作完成后纏繞在滾筒上,受到交變應(yīng)力的作用,存在疲勞損壞的危險。纏繞機(jī)構(gòu)作為上述過程的動力源,承載了設(shè)備較大的載荷,其傳動性能和齒輪系強(qiáng)度成為研究重點。本文的研究內(nèi)容主要包括以下幾個方面： (1)深入研究了井下瓦斯突出問題及現(xiàn)有的防突技術(shù)方案,探討了高壓水射流破煤以及防突機(jī)理,在此基礎(chǔ)上闡述了水射流割縫防突的原理和方法。 (2)借助ANSYS軟件結(jié)構(gòu)分析模塊的強(qiáng)大功能,研究纏繞在滾筒上的焊接無縫鋼管工作彎曲時的靜力以及工作過程中的彎曲疲勞,對焊接鋼管的疲勞壽命進(jìn)行預(yù)測。 (3)利用UG三維造型功能完成設(shè)備傳動系統(tǒng)主要零件的模型和裝配,再利用多體動力學(xué)仿真軟件ADAMS建立設(shè)備傳動部分的剛體動力學(xué)分析模型,以此得到傳動部分的運動學(xué)仿真結(jié)果。 (4)在ANSYS環(huán)境下對傳動系統(tǒng)的主要零部件如軸、齒輪等進(jìn)行靜力學(xué)和動力學(xué)分析,得到其應(yīng)力和應(yīng)變情況,振動振型和模態(tài)信息。
[Abstract]:Gas control in coal mines is related to the overall situation of safe production, but there are many difficulties in practice. Some coal seams have low permeability. With the increase of operation depth, gas drainage becomes more difficult and the cost increases. There are many traditional methods to prevent and cure gas outburst, such as early blasting, borehole pre-drainage, hydraulic punching and so on, but they all have low efficiency. The theory and practice show that the new method of high pressure water jet cutting in borehole can effectively improve the permeability of coal seam, so it is of great practical significance to develop the cutting equipment. The research object of this paper is the continuous research and improvement of the slit drilling rig in Taiyuan University of Technology for many years. The equipment is driven by hydraulic system and wound the welded seamless steel pipe on the drum, which makes the equipment have a long working radius. At the same time, it is walking. With the assistance of a series of commutative mechanisms, the various actions of underground operation are completed to achieve the design purpose of improving the permeability of coal seams by cutting joints. The welded steel pipe, as a passage of high pressure water jet, reaches out to the tunneling face when working. Winding on the drum after the completion of the work, under the action of alternating stress, there is a danger of fatigue damage. As the power source of the above process, the winding mechanism bears a large load on the equipment. Its transmission performance and gear system strength have become the focus of the research. The research contents of this paper mainly include the following aspects:. 1) the problem of underground gas outburst and the existing technical scheme of preventing outburst are studied in depth, and the mechanism of breaking coal and preventing outburst by high pressure water jet is discussed. On the basis of this, the principle and method of preventing outburst by cutting joint of water jet are expounded. With the help of the powerful function of the structure analysis module of ANSYS software, the static force and bending fatigue of welded seamless steel tube wound on the drum are studied, and the fatigue life of welded steel pipe is predicted. Using UG three-dimensional modeling function to complete the model and assembly of the main parts of the equipment transmission system, and then using the multi-body dynamics simulation software ADAMS to establish the rigid body dynamics analysis model of the transmission part of the equipment. The kinematics simulation results of the transmission part are obtained. The main parts of transmission system such as shafts and gears are analyzed by statics and dynamics under ANSYS environment, and the stress and strain, vibration mode and modal information are obtained.
【學(xué)位授予單位】：太原理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：TD713

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