Optimisation and Application Analysis of the Support Method for the Closing Perimeter Rock of Composite Roof Slab Working Face
It is difficult to manage the top plate in coal mining under the condition of composite top plate,and it is easy to have various problems such as large amount of top plate off the layer and risk of falling,which brings constraints on the safe recovery of coal from the mining face.Taking the closing of 31107 comprehensive mining face as the engineering background,for the problem of composite roof,based on the comprehensive comparison of anchor rod and anchor cable support,Ⅰ-beam steel frame shed support and joint support(anchor net cable+working steel frame shed),the preferred method of joint support is to control the stability of the perimeter rock of the withdrawal channel;combined with the on-site conditions,the arrangements for the closing work are elaborated.The adopted closing method and perimeter rock control method can meet the needs of large tonnage equipment retraction in 31107 comprehensive mining face,during which there is no problem of large perimeter rock deformation and hydraulic bracket crushing,which creates good conditions for the safe and efficient retraction of mining face equipment.
composite roof plateclosing perimeter rock supportpreference
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