These machines belong to high speed steel plate drilling machine,moving speed of X.Y axis is 0-8m/min,suitable large plate drilling work.
CNC drilling machine for drilling holes in steel plates. The processed workpieces may be connector of steel structural buildings,
bridges, connecting plates on iron towers, or large flanges, heat exchanger tube sheets, and the like.Fully automatic machining.
High efficiency and high precision.
Cnc High Speed Drilling Machine High Speed Drilling Machine,Cnc High Speed Drilling Machine,High Speed Driller,High Speed Steel 3D Drilling Machine Shandong XingTian Sunshine Intelligent Equipment Co., Ltd. , https://www.cnsunshinecnc.com
First, the roof fell accident
Roadway roofing accidents mainly occur in the heading face, the opening or passing of the roadway, the large section chamber, and the fracture zone.
2. Suspension and lifting accidents of vertical shafts
(1) Shake to raise the accident. During the well construction process, there was an accident when the lifting bucket was lifted and the well door was not opened and collided, and the bucket was lowered to the working surface without deceleration. The bottom of the bucket was mixed with debris falling into the well, and the bucket was turned over to cause the accident. Wait. It is required to improve the various protection devices and signal devices of the hoist; improve the wellhead facilities, strengthen the overhaul of the buckets and cages, and check, check and regularly maintain the wire ropes.
(2) Vertical crane suspension accidents. The most dangerous thing in the vertical suspension accident is the hanging plate overturning accident. All kinds of suspension equipment must be designed in accordance with the “Mineral Mineway Engineering Construction and Acceptance Specificationsâ€. Regular inspections should be carried out to strengthen management.
Third, flood accidents
During the construction of the tunnel, the groundwater in the rock formation and the surface water connected to the underground suddenly surge into the underground space, and flood accidents may occur.
Fourth, fire accidents
Fire accidents during construction of wells can be divided into external fires and internal fires depending on the source of fire.
The use of open flames, electrical ignition or mechanical friction to generate electric sparks, gas and coal dust explosions may cause external fires; coal is oxidized at room temperature to generate heat, which may cause coal to spontaneously ignite and cause internal fires.
V. Gas coal dust accident
Gas coal dust accidents in well construction may generally occur when the wellbore uncovers the coal seam or when it enters the mining roadway. In order to prevent coal and gas outburst accidents when uncovering coal seams, it is necessary to first confirm whether there is such a danger in the mines built in order to take preventive measures.
Common accidents and prevention techniques in mine roadway construction
Common accidents during roadway construction are: roof fall accident, suspension and lifting accidents, floods, accidents, fires, gas coal dust and other accidents the main shaft construction.