Whether it is a fully mechanized mining face or a roof collapse, it will have an impact on normal production. Seriously, it will cause production stoppage, equipment damage or casualties. Therefore, the topping accident of the working face or the trough should be based on prevention and comprehensive management. Mainly. Once the working face or the trough occurs, the following principles must be followed: first, take active measures to prevent the expansion of the roof area, and secondly, adopt different support methods for different natures and different degrees of the roof; third is the high-risk area. The space is treated; the fourth is through the roof area. 1. Treatment measures for roof fall accidents in fully mechanized mining face 1), adopt the method of forced passage When forced through, the total height of the height and height should be within the maximum height of the bracket, and the width of the roof is less than 2 meters, and the depth of the coal wall is less than 1 meter. Before taking measures to force push over the roof, the shearer should first be driven to the side of the nose (tail) where the roof is relatively severe. At the same time, measures such as shooting can be used to empty the coal hopper in the conveyor to ensure the smooth operation of the shearer. When cutting coal, the shearer should ensure that the top plate is cut, and one frame is cut, and the area of ​​the roof is continuously reduced. In the case of forced passage, coal cutting should be carried out by means of a knife or the like to reduce the roof area. 2), stop production, support and filling treatment of the roof area If the height or width of the roof is beyond the control range, it is necessary to adopt a method of stopping production, and firstly bond and strengthen the sides of the roof and the coal. The high-mass area is filled with high-molecular materials to ensure that the support is tight when the support is moved forward, and the support is effective. For the better overall integrity of the roof, anchors such as anchors or anchors can be used to fix the roof of the roof. 2, comprehensive mining and trough top treatment measures 1) First, take active measures to prevent the expansion of the roof area. Where possible extension of the cave area on the roof were reinforced support; integrity of the roof can be good with a locking cable; broken roof rack segment can be a metal shed and so on. 2) Pay close attention to the situation of the gang near the roof area. If the gang has signs of gangs, it is necessary to reinforce the gang. 3) According to the size of the roof, the temporary support of the roof of the roof is treated. If the roof area is small and the roof is relatively stable, after the temporary support is taken, the high-rise area can be filled by means of rafting on the anchor beam or the shed; if the roof is unstable or high High, temporary support is more difficult, can be scaffolded on the ceiling height, and sealed, and then injected into the high-level area of ​​polymer filling materials. China's salt-making enterprises consume far more energy than foreign advanced enterprises. In the salt-making process, the evaporation process consumes a large proportion of the total energy consumption., and Axial Flow Pumps are used in this area more and more. we specify this as our major products series. Chemical Dosing Pump,Pumps For Salt Industry,Clear Salt Transfer By Pump,Salt-Making Machine By Pump Sichuan Zigong Industrial Pump Co.,Ltd. , https://www.zgpump-global.com
Treatment measures for roof fall accidents in fully mechanized mining face and along the trough
Treatment measures for roof fall accidents in fully mechanized mining face and along the trough