【摘要】：本文圍繞“袁店二礦7232工作面梯形巷道低幫破壞特征”,以袁店二礦400m埋深的7232工作面巷道為研究對象,針對低幫側(cè)中上部出現(xiàn)明顯的鼓出,且不少區(qū)域鼓出部位的錨桿從托盤處斷裂的現(xiàn)象,在廣泛收集資料及長期現(xiàn)場跟蹤的基礎(chǔ)上,運用理論分析、數(shù)值模擬、現(xiàn)場工業(yè)性試驗等綜合研究手段,展開如下研究:(1)井巷圍巖彈性應(yīng)力分布規(guī)律研究:從軸對稱圓巷圍巖彈性應(yīng)力狀態(tài)理論推導(dǎo)入手,逐步過渡到一般圓巷圍巖彈性應(yīng)力狀態(tài),最后到非圓巷圍巖彈性應(yīng)力狀態(tài),以此為依據(jù)建立不同的力學(xué)模型分析傾角對彈性應(yīng)力狀態(tài)的影響。(2)不同頂板傾角對梯形巷道幫部應(yīng)力分布的影響研究:運用FLAC3D5.0數(shù)值模擬軟件模擬不同頂板傾角對巷道幫部應(yīng)力分布的影響。根據(jù)頂板傾角的改變,建立三種傾角(0°,17°,30°)條件下的巷道模型。通過分析不同傾角巷道的圍巖應(yīng)力分布、位移量變化以及塑性區(qū)等規(guī)律,得出幫部圍巖應(yīng)力隨頂板傾角的變化而變化的規(guī)律,進而得出頂板傾角對梯形巷道應(yīng)力分布的影響規(guī)律,為各礦區(qū)不同頂板傾角支護提供一定的理論基礎(chǔ)。(3)不同支護方案對巷道幫部圍巖控制效果的研究:根據(jù)實際情況,結(jié)合以上模擬得出的頂板傾角對巷道幫部應(yīng)力分布影響規(guī)律,利用數(shù)值模擬軟件模擬出不同支護方式下的巷道幫部圍巖控制效果。分別從增加錨桿長度、增加錨桿根數(shù)和改變錨桿間距三種形式進行模擬,全面分析并驗證不同方式對巷道圍巖控制的效果差異。在滿足安全生產(chǎn)要求的前提下,選擇合理的支護方式,避免盲目地對巷道進行加固修整而浪費人力和財力。(4)工業(yè)性試驗及現(xiàn)場實測研究:在上述研究的基礎(chǔ)上,針對袁店二礦7232工作面梯形巷道低幫中上部鼓出的案例,結(jié)合實際資金和工人勞動量等因素,對巷道低幫采用以上提出的方案進行驗證。工業(yè)性試驗礦壓監(jiān)測表明7232工作面梯形巷道低幫的工業(yè)性試驗是成功的,不等強支護在不影響安全和不增加資金負(fù)擔(dān)的情況下有效地遏制了巷道幫部中上部變形,證明了不等強支護是治理梯形巷道低幫中上部鼓出的有效控制手段,為此類巷道群的有效控制提供了參考和指導(dǎo)。
[Abstract]:This paper focuses on the "characteristics of low slope failure of trapezoidal roadway in No. 7232 face of Yuandian No.2 Mine", taking the 7232 face roadway with 400m buried depth in Yuandian No. 2 Mine as the research object, aiming at the obvious bulging out of the middle and upper part of the low side. On the basis of extensive data collection and long-term field tracking, comprehensive research means such as theoretical analysis, numerical simulation, field industrial test and so on are used. The following studies are carried out: (1) the distribution of elastic stress in surrounding rock of shaft and roadway: starting with the theoretical derivation of elastic stress state of surrounding rock in axisymmetric circular roadway, the elastic stress state of surrounding rock in general circular roadway is gradually transferred to the elastic stress state of surrounding rock in non-circular roadway. Based on this, different mechanical models were established to analyze the effect of dip angle on elastic stress state. (2) the influence of different roof dip angle on stress distribution of trapezoidal roadway was studied: FLAC3D5.0 numerical simulation software was used to simulate different roof dip angle. The influence of stress distribution on the side of roadway. According to the change of roof inclination angle, the roadway models under three kinds of inclination angles (0 擄~ 17 擄~ 30 擄) are established. By analyzing the stress distribution of surrounding rock, displacement change and plastic zone of roadway with different inclination angles, the variation of surrounding rock stress with the change of roof inclination angle is obtained. The influence of roof inclination angle on the stress distribution of trapezoidal roadway is obtained, which provides a certain theoretical basis for different roof inclination support in mining areas. (3) study on the control effect of different supporting schemes on surrounding rock of roadway roof: according to the actual situation, Combined with the influence of roof inclination angle on the stress distribution of roadway slope, numerical simulation software is used to simulate the control effect of roadway roof surrounding rock under different supporting modes. In order to analyze and verify the effects of different ways on controlling the surrounding rock of roadway, the simulation is carried out by increasing the length of anchor rod, increasing the number of bolt roots and changing the spacing of anchor rod respectively. On the premise of meeting the requirement of safe production, reasonable supporting method is chosen to avoid wasting manpower and financial resources by blindly strengthening and repairing roadway. (4) Industrial test and field measurement research: on the basis of the above research, In view of the case of the middle and upper bottom of trapezoidal roadway in No. 7232 working face of Yuan Dian No. 2 Coal Mine, combined with the factors of actual capital and labor quantity of workers, this paper verifies the scheme of the low slope of roadway adopted above. The industrial test shows that the low slope of trapezoidal roadway in 7232 face is successful in industrial test. The unequal support can effectively restrain the deformation of the upper and middle part of roadway without affecting safety and increasing the burden of funds. It is proved that unequal strength support is an effective control method for controlling the middle and upper top of trapezoidal roadway, which provides a reference and guidance for the effective control of this kind of roadway group.
【學(xué)位授予單位】：中國礦業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TD353

【參考文獻】

相關(guān)期刊論文 前10條

1 王猛;柏建彪;王襄禹;陳斌;韓志婷;;深部傾斜煤層沿空掘巷上覆結(jié)構(gòu)穩(wěn)定與控制研究[J];采礦與安全工程學(xué)報;2015年03期

2 王安;;煤層傾角變化對錨桿支護回采巷道圍巖力學(xué)特征的影響[J];內(nèi)蒙古煤炭經(jīng)濟;2014年12期

3 伍永平;解盤石;王紅偉;任世廣;;大傾角煤層群長壁采場低位梯階關(guān)鍵層[J];西安科技大學(xué)學(xué)報;2014年06期

4 闞甲廣;楊森;張農(nóng);;巷道掘進擾動效應(yīng)影響因素研究[J];采礦與安全工程學(xué)報;2014年06期

5 伍永平;劉孔智;，

本文編號：2250415