【摘要】：針對高偏應(yīng)力環(huán)境下層狀頂板巷道冒頂事故頻發(fā)、支護(hù)困難等問題,采用理論分析、數(shù)值模擬、現(xiàn)場探測和現(xiàn)場工程試驗(yàn)等綜合研究方法,揭示了層狀頂板巷道蝶葉塑性區(qū)的分布規(guī)律,闡明了蝶葉塑性區(qū)穿透分布致使巷道冒頂?shù)牧W(xué)機(jī)制,結(jié)果表明:蝶葉塑性區(qū)具有隔層穿透發(fā)育的特征,未發(fā)生塑性破壞巖層的存在不能阻斷蝶葉塑性區(qū)在軟弱巖層形成;頂板蝶葉塑性區(qū)穿透分布伴有強(qiáng)烈的變形壓力,使軟弱巖層塑性區(qū)下位未發(fā)生塑性破壞巖層受到持續(xù)巨大的"擠壓"載荷,致使其發(fā)生斷裂破壞,是巷道存在冒頂隱患的內(nèi)在原因。據(jù)此提出了防止此類巷道冒頂?shù)年P(guān)鍵在于維護(hù)塑性區(qū)圍巖穩(wěn)定,需錨桿(索)長度大于塑性區(qū)邊界,且具備可承受大變形而不破斷的能力�；谝陨涎芯�,對神東保德礦81306二號回風(fēng)巷進(jìn)行了支護(hù)補(bǔ)強(qiáng)設(shè)計(jì)和試驗(yàn),試驗(yàn)結(jié)果表明該支護(hù)對策能夠有效維持巷道頂板穩(wěn)定。
[Abstract]:In order to solve the problems of frequent roof fall accidents and difficult support in the high deflection stress environment, a comprehensive research method, such as theoretical analysis, numerical simulation, field detection and field engineering test, is adopted. The distribution law of the sphenoid leaf plastic zone in the layered roof roadway is revealed, and the mechanical mechanism of the sphenoid leaf plastic zone penetration distribution resulting in the roof falling of the laneway is clarified. The results show that the sphenoid leaf plastic zone has the characteristics of the development of interlayer penetration. The absence of plastic failure can not block the formation of the sphenoid plastic zone in the weak rock strata. The penetrating distribution of plastic zone of the sphenoid leaves of the roof is accompanied by strong deformation pressure, so that no plastic damage occurs in the plastic zone of the weak rock layer, and the rock layer is subjected to a continuous "extrusion" load, which results in the fracture failure. It is the inherent reason of the hidden danger of roof fall in roadway. The key to prevent the roof fall of this kind of roadway is to maintain the stability of surrounding rock in plastic zone, the length of anchor rod (cable) is larger than the boundary of plastic zone, and the ability to withstand large deformation without breaking is put forward. Based on the above research, the supporting reinforcement design and test of No. 81306 backwind roadway in Shendong Baode Mine are carried out. The experimental results show that the supporting countermeasures can effectively maintain the roof stability of the roadway.
【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;中國礦業(yè)大學(xué)(北京)資源與安全工程學(xué)院;
【基金】：河南省教育廳高等學(xué)校重點(diǎn)科研項(xiàng)目資助(16A440006) 河南理工大學(xué)博士基金項(xiàng)目資助(660207/007)
【分類號】：TD353;TD327.2

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