山东煤炭科技
山東煤炭科技
산동매탄과기
Shandong Coal Science and Technology
2015年
4期
40-42
,共3页
夹软煤巷道%应力分布%塑性区演化%全长预应力锚杆支护系统
夾軟煤巷道%應力分佈%塑性區縯化%全長預應力錨桿支護繫統
협연매항도%응력분포%소성구연화%전장예응력묘간지호계통
roadway with soft coal interlayer%stress distribution%evolution of plastic zone%prestressed bolt support system
针对寺河煤矿二号井15#煤层夹软煤巷道支护困难、多次返修的问题，通过对煤层和顶底板岩性调研，采用FLaC3D数值模拟，分析不同支护参数下应力分布和塑性区演化特征，确定全长预应力锚杆支护系统参数，并对支护效果进行了现场实测。结果表明：夹软煤巷道变形以两帮收敛和底鼓为主；全长预应力锚杆支护系统有效地控制了巷道变形；该技术应用减少了巷道返修次数，具有显著的经济效益。
針對寺河煤礦二號井15#煤層夾軟煤巷道支護睏難、多次返脩的問題，通過對煤層和頂底闆巖性調研，採用FLaC3D數值模擬，分析不同支護參數下應力分佈和塑性區縯化特徵，確定全長預應力錨桿支護繫統參數，併對支護效果進行瞭現場實測。結果錶明：夾軟煤巷道變形以兩幫收斂和底鼓為主；全長預應力錨桿支護繫統有效地控製瞭巷道變形；該技術應用減少瞭巷道返脩次數，具有顯著的經濟效益。
침대사하매광이호정15#매층협연매항도지호곤난、다차반수적문제，통과대매층화정저판암성조연，채용FLaC3D수치모의，분석불동지호삼수하응력분포화소성구연화특정，학정전장예응력묘간지호계통삼수，병대지호효과진행료현장실측。결과표명：협연매항도변형이량방수렴화저고위주；전장예응력묘간지호계통유효지공제료항도변형；해기술응용감소료항도반수차수，구유현저적경제효익。
Aiming at the supporting dififculties and multiple repair of roadway soft coal interlayer which arrange in15# coal seam in Sihe coal mine well No., based on the research of coal seam,roof and floor lithology, using numerical simulation of FLaC3D , analyzed the stress distribution and the evolution of plastic zone characteristics when using the different support parameters, and to determine the prestressed bolt support system parameter, ifnally measured support effect. The results showed that:the roadway deformation take the convergence of two sides and the lfoor heave as the principal thing , the prestressed bolting system control the roadway deformation effectively;the application of the technology reduce the roadway repair times, and has obvious economic beneift.
