综放工作面顶板运动规律及支架-围岩关系研究
Study on roof movement law and powered support-surrounding rock relationship of fully-mechanized top coal caving mining face
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摘要: 布尔台煤矿42103综放工作面回采过程中,经常出现台阶下沉甚至支架压死等现象,在对42103综放工作面支架合理工作阻力进行分析的基础上,采用理论推导和现场实测相结合的研究方法对工作面顶板运动规律进行计算,建立了42103综放工作面顶板结构模型,并分析支架-围岩的相互关系,利用顶板结构模型法和动载系数法综合计算确定了42103综放工作面支架合理工作阻力。研究结果表明:42103综放工作面顶板压力为1.63 MPa,支架合理工作阻力为18 709 k N,支架合理支护强度为1.71 MPa。Abstract: in a mining procss ofNo.42103 ful -mechanized top coal caving miming face in BueralMine,the powered suppors would frequently cause the bench subsidence and even jamming henomenon.Based on the analysis on the rational worcing res stance of the powered suppors in No.42103 ruly-mechanized top coal caving mining face a stuty nethod combined with a theoretcal derivation and a site meaurement was aplied to the calculation on the roof movement aw ofthecoal mindng face. A roo structure model of No.42103 rulymechanized top coal caving mining face was establis hed.The interelaton between the powered support and surounding rock was analyzed.T he roof stuctre model method and the dynamic load coeicient method were applied to comprehensivly calculate and detemine the rationaworking resistance of the powered suppor in Nc.42103 ruly-mechanized top coal caing mining fac.The studl resuls showed tht the of pressure of o.42103 ull.mechanized top coal caving mining face was 1.53 MPa.the rational working resistanceof the powered supportwa 18 709 kNand the ratihnalsupport itensty was 1.71 MPa.
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