1. There pillar sublevel caving stone less suitable for clamping, without selective mining, less complex shape, a thickness greater than a thickness of 5m ore or ore Heavy any Steep angle;
2. The height of the steeply inclined and inclined thick ore body should be 20m ~ 30m ; when the inclined medium thick ore body is arranged along the striker, the height of the section should be 10m ;
3. There is a sublevel caving method for the bottom column. Vertical slashing and small compensation space extrusion blasting should be adopted. The compensation space coefficient of blasting blasting should be selected according to different mining methods or determined by experiment. The compensation space coefficient should be 15%. ～ 20 %;
4. When the gently inclined ore body adopts the vertical strip collapse, the most convex part of the ore body in the ore block shall be provided with a cutting groove; the steeply inclined and inclined medium thick ore body, when the ore block is arranged along the strike, the ore body in the ore block The thickest part should be provided with a cutting groove;
5. When the upper and lower sections are simultaneously mined, the horizontal distance ahead of the upper section shall not be less than 1.5 times of the section height ;
6. When mining large ore bodies and the output of the panel is large, special intake and return air passages shall be arranged;
7. When the top plate of the stope cannot be self-propelled, it should be forced to collapse in time, or it can be filled with filling material. Trapezoidal Toothed PU Timing Belt
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