發(fā)布時間：2019-04-17 08:39

【摘要】：王家?guī)X煤礦20106工作面切眼具有設計斷面尺寸大,煤巖復合頂板,支護難度大的特點,支護方式嚴重制約了巷道掘進速度。本文以王家?guī)X煤礦20106工作面切眼為工程背景,采用現場調研、實驗研究、理論分析、數值模擬與工業(yè)性試驗相結合的研究方法,系統地研究了厚煤層大斷面切眼的支護技術。通過現場調研和實驗測試,掌握了工作面切眼的賦存條件和典型煤巖體的力學參數,分析了切眼圍巖變形影響因素,建立了頂板及幫部力學模型,并進行開切眼物理相似模擬,分析大斷面切眼圍巖變形機理,掌握圍巖變形破壞特征,提出了厚煤層大斷面切眼圍巖控制技術關鍵,確定20106工作面切眼采用“錨桿+網+錨索”聯合支護方式,依據極限平衡理論設計支護參數,采用FLAC3D模擬分析不同支護方案的圍巖控制效果,確定最優(yōu)方案。工業(yè)性試驗結果表明,支護方案可有效的控制切眼的圍巖變形,并顯著提高了切眼掘進速度,取得了良好的社會經濟效益,可為王家?guī)X煤礦和其他相似條件煤礦的大斷面煤巷支護設計提供借鑒參考。
[Abstract]:The cutting hole of 20106 working face of Wangjialing Coal Mine has the characteristics of large design cross-section size, coal-rock composite roof and difficult support. The supporting method seriously restricts the speed of tunnel excavation. Taking the 20106 face of Wangjialing Coal Mine as the engineering background, this paper systematically studies the supporting technology of large cross-section cut in thick coal seam by means of field investigation, experimental research, theoretical analysis, numerical simulation and industrial test. Through on-the-spot investigation and experimental test, the paper grasps the existing conditions and mechanical parameters of typical coal and rock mass, analyzes the influencing factors of deformation of surrounding rock of cut hole, establishes the mechanical model of roof and support, and simulates the physical similarity of opening hole. Based on the analysis of the deformation mechanism of the surrounding rock with large cross-section cut, the characteristics of deformation and failure of the surrounding rock are grasped, the key technology for controlling the surrounding rock of the large-section cut-hole in thick coal seam is put forward. According to the limit equilibrium theory, the supporting parameters are designed, and the control effect of surrounding rock of different supporting schemes is simulated and analyzed by FLAC3D, and the optimal scheme is determined. The industrial test results show that the supporting scheme can effectively control the deformation of the surrounding rock of the cut-hole, and significantly increase the speed of the cut-hole excavation and obtain good social and economic benefits. It can provide reference for the support design of large section coal roadway in Wangjialing Coal Mine and other similar coal mines.
【學位授予單位】：中國礦業(yè)大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TD353

【引證文獻】

相關會議論文 前2條

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本文編號：2459273