Method for determining sizes of and distance between artificial pillars for room coal pillar recycling
A technology of artificial ore pillars and room-type coal pillars, applied in mining equipment, earthwork drilling, filling and other directions, can solve problems such as staying in primary ore pillars, and achieve the effect of avoiding accidents, ensuring high efficiency, and ensuring safe production in mines
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[0041] The method for determining the size and spacing of artificial pillars for recovering room-type coal pillars of the present invention: in the process of recovering room-type coal pillars, the process of supporting the upper roof of the room-type coal pillars is divided into the stage of artificial mine pillars supporting the roof alone Combined support stage with artificial pillars and solid filling materials; according to the force balance principle and the Winkel foundation model, aiming at the support characteristics of the two different stages, the artificial pillars alone support the roof stage and the artificial pillars collaborative solid Based on the mechanical model of the filling material joint support stage, the stress of the artificial pillar is obtained. According to the load on the artificial pillar, it should be less than its allowable stress [σ 1 ], draw the relationship diagram of the artificial pillar size a×a and the artificial pillar spacing l in the s...
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