| This paper takes chongqing codium coal energy investment group co.,LTD.Meet spring S2611 working face of coal mine as the engineering background,collecting a large number of literature data and based on field investigation of coal mine,in view of the conditions in the mining of deeply inclined thin coal seam,considering the working arrangement,supporting,coal mining and coal roadway drivage technology and move indiana way,determine the steep prone pseudo inclined fully mechanized mining technology,and based on this process,the stability of the corresponding equipment,face pour skid prevention technique of reasonable measures are put forward.The main research contents are as follows:(1)S2611 specific geological conditions of coal mine based on the spring,determine the for moves towards the longwall top pseudo inclined arrangement,length of 83.36 m,prone pseudo for 52 ° inclined Angle;Hydraulic support "alien" design,and ultimately determine the plane Angle is 73 °;The construction technology of coal roadway rapid blasting is adopted.Two front feelers made of # 9 or # 11 i-steel are used as temporary support,while the metal bracket of # 11 i-steel is used as permanent support.(2)The main equipment of the working face of the steeply inclined inclined pseudo inclined fully mechanized mining consists of a double-drum coal mining machine,a guide connecting device(" guide system " for short)and a self-shifting hydraulic support.Through the analysis of the working face layout characteristics,the coal is transported along the guide system and the coal wall by self-slipping.The roof of the working face is supported by hydraulic support.(3)Through to the mining conditions and equipment operating conditions,a comprehensive analysis to determine the pseudo inclined fell steeply inclined thin coal seam face comprehensive mechanized mining process,the coal winning machine along the working face of coal cutting down(on)export,under the mining(on)the end to complete oblique cutting feed,and integral guiding system,finally move order from down to up.(4)The stability of the equipment in the face of steeply inclined crane is very serious.Through field investigation,theoretical analysis and industrial experimental study,the paper puts forward that the coal mining machine adopts the riding mode without chain traction.Use anti-skid jack to prevent the guide system from sliding;In working face bottom department set up six market,in order to improve the overall stability of the working face support,and considering initial freedom,supporting and working three states,discusses the coal seam dip Angle,support dead weight,working resistance and roof pressure,aspect ratio and other factors on the effect on the stability of the support,advice in the subsequent stents manufacturing process,appropriately increase the working resistance of support,reduce frame weight,increasing the ratio of high to width of stents.(5)Based on the stability analysis of S2611 working face equipment,in order to prevent the equipment from slipping down,the coal mining machine is equipped with braking anti-skid system and safe towing winch.The guide system adopts the overall moving mode,and produces an inclined upward force in the process of moving,which reduces or offsets the sliding of the guide system.The structure and technological measures of the hydraulic support are optimized,such as the drawing mode,the structure and setting position of the support base,the control mode of the jack and the side guard.(6)Compared with the previous mining technology of the fuchun coal mine,the working efficiency of the fully mechanized mining face of the steep inclined and thin coal seam increased by 9.1t/ work,and the labor cost saved by more than 2.7 million yuan.At the same time,there are social benefits such as increasing the rate of coal resource extraction,improving the working environment,improving production safety and promoting technological innovation of enterprises. |
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