發(fā)布時間：2018-06-07 09:51

  本文選題：條帶煤柱 + 膏體置換開采�。� 參考：《采礦與安全工程學報》2016年04期

【摘要】：以山東能源集團岱莊煤礦2351膏體充填置換條帶煤柱工作面為例,對井下充填體承載特性及工作面支護強度進行了研究。在分析膏體充填開采頂板運動特征的基礎上,建立了膏體充填開采頂板穩(wěn)定性力學模型,推導出了膏體充填開采工作面支護強度力學關系式。結果表明:膏體的力學性質離散性較大,強度較高,彈性模量和泊松比偏低,在低圍壓下膏體即表現出典型的塑性強化特性。充填采場上覆巖層主要存在裂縫、離層和彎曲下沉,不存在垮落帶。充填體上分布的垂直應力既不是大小相同的水平線,也不是類似于條帶煤柱上的馬鞍形分布,而呈現出波浪形分布,自充填完成至覆巖運動穩(wěn)定,充填體受力未出現突變現象,是一個逐步增大并趨于穩(wěn)定的過程。2351膏體充填工作面現選用的充填式液壓支架雖可有效地控制頂板下沉,但未能發(fā)揮所選支架的效能,還可進行適當優(yōu)化。
[Abstract]:Taking the 2351 plaster filling replacement stripe coal face of Daizhuang Coal Mine of Shandong Energy Group as an example, the bearing characteristics of the downhole filling and the supporting strength of the working face are studied. On the basis of analyzing the characteristics of roof movement in paste filling mining, the mechanical model of roof stability of paste filling mining face is established, and the mechanical formula of supporting strength of paste filling mining face is deduced. The results show that the mechanical properties of the paste are discrete, the strength is high, the elastic modulus and Poisson's ratio are low, and the paste shows typical plastic strengthening characteristics under low confining pressure. The overburden strata in filling stope are mainly fractured, separated and bent, and there are no caving zones. The vertical stress distribution on the filling body is neither a horizontal line of the same size nor a saddle distribution similar to the saddle distribution on a strip coal pillar, but shows a wave distribution, from the completion of filling to the stability of the overburden movement, and there is no sudden change in the force acting on the filling body. It is a gradually increasing and stabilizing process .2351 paste filling face with filling type hydraulic support can effectively control roof subsidence, but can not play the effectiveness of the selected support, and can also be properly optimized.
【作者單位】： 山東科技大學礦山災害預防控制省部共建國家重點實驗室培育基地礦業(yè)與安全工程學院;
【基金】：國家自然科學基金項目(51274132,U1361105) 教育部博士點基金項目(20133718110001) 山東省自然科學基金重點項目(ZR2013EEZ001)
【分類號】：TD823.7

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