唐山矿大倾角厚煤层错层位综放工作面矿压显现规律

Behavior Laws of Mine Pressure of Steep Thick Coal Seam with Stagger Roadway Layout in Tangshan Mine

与传统综放开采相比,唐山矿Y294工作面采用大倾角厚煤层错层位综放开采技术,该技术改变了传统巷道布置方式,即将工作面进、回风巷分别沿顶、底板布置,其矿压显现规律亦有所差异,通过采用FLAC3D数值模拟和现场观测相结合的方法,对工作面矿压显现规律进行了研究分析,得出了唐山矿Y294大倾角厚煤层错层位综放工作面上、中、下部围岩的受力和运移特点、支架的受力情况以及工作面顶板来压规律。

Comparing with the traditional full-mechanized mining, the Y294 working face of steep thick coal seam of Tangshan Mine adopting the stagger roadway layout mining method which had changed the way of traditional roadway layout, the inturn and return air roadways should be arranged along the top and bottom plate respectively, so the behavior laws of mine pressure of the new mining method should be different from the traditional mining method. The behavior laws of mine pressure of steep thick coal seam with the stagger roadway layout were analyzed in the paper by using the method of FLAC3 Dnumerical simulation and the field observation, the stress and movement characteristics of the surrounding rock in the upper, middle and lower part of fully mechanized caving face of Y294 large dip thick coal seam in Tangshan Mine, the stress situation of the supports and the laws of roof pressure on the working face are obtained.