【摘要】：基于對傾斜煤層回采巷道斷面形狀、布置方式及失穩(wěn)機制分析,進行了斜頂巷道基本支護力學(xué)計算,建立了斜頂巷道圍巖再造承載層力學(xué)模型,確定了斜頂巷道再造承載層圍巖穩(wěn)定性影響因素,提出了斜頂巷道圍巖再造承載層控制原則與控制技術(shù),最后進行了數(shù)值模擬與現(xiàn)場試驗。結(jié)果表明:傾斜煤層沿頂回采巷道頂煤體積減小,巖層頂板裸露,表層壓力減小,但拱腳局部壓力增大與松軟煤體承載力降低易導(dǎo)致圍巖失穩(wěn);斜頂巷道失穩(wěn)分為兩幫擠壓流動失穩(wěn)和頂板壓縮錯動失穩(wěn)2種形式,兩幫再造承載層位置越高、深度越長及頂板傾角越大,巷道圍巖越穩(wěn)定;斜頂巷道圍巖再造承載層控制原則為基本支護控制淺部圍巖、特殊錨桿錨固軟弱煤體與再造承載層體強化的三體協(xié)同,采用設(shè)計三體協(xié)同支護方案后,頂板及兩幫變形量受控,支護效果顯著。
[Abstract]:Based on the analysis of the section shape, layout mode and instability mechanism of inclined coal seam mining roadway, the basic supporting mechanics calculation of inclined roof roadway is carried out, and the mechanical model of reconstructing bearing layer of inclined roof roadway surrounding rock is established. The factors influencing the stability of the surrounding rock in the reconstituted bearing layer of inclined roof roadway are determined, and the control principle and control technology of the reconstituted bearing layer of the inclined roof roadway are put forward. Finally, the numerical simulation and field test are carried out. The results show that the volume of top coal in mining roadway along the top of inclined coal seam is reduced, the roof of rock is exposed and the pressure of surface layer is reduced, but the increase of local pressure of arch foot and the reduction of the bearing capacity of soft coal can easily lead to the instability of surrounding rock. The instability of inclined roof roadway can be divided into two forms: two side compression flow instability and roof compression staggered instability. The higher the position of the bearing layer, the longer the depth and the bigger the roof inclination angle, the more stable the surrounding rock of the roadway is. The control principle of reconstructing bearing layer of surrounding rock of inclined roof roadway is basic support control of shallow surrounding rock, special bolt anchoring weak coal body and strengthening three-body coordination of reconstructing bearing layer body. After adopting the design of three-body synergistic supporting scheme, the deformation of roof and two sides is controlled. The support effect is remarkable.
【作者單位】： 河南理工大學(xué)能源科學(xué)與工程學(xué)院;煤炭安全生產(chǎn)河南省協(xié)同創(chuàng)新中心;河南能化集團永華能源有限公司郭村礦;
【基金】：國家自然科學(xué)基金項目(51374091) 河南省教育廳科學(xué)技術(shù)研究重點項目(14B440001) 焦作市科技攻關(guān)計劃項目(20151021103453)
【分類號】：TD353

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