Safety technical measures for the hottest retracti

Safety technical measures for retracting belt conveyor head

1. Overview of the working face

the transportation roadway of the working face is arranged along the coal seam tendency, and it is excavated along the roof, with a length of * * * M. the air return roadway is arranged along the coal seam tendency, and it is excavated along the roof, with a length of * * * M. the coal exit roadway of the air return roadway is * * * m, with a total length of * * * M. the cutting hole is arranged along the coal seam trend, with a length of * * * M. The overall trend of the working face is high in the outside and low in the inside. The slope of the transportation roadway is 3 ~ 5, the slope of the return air roadway changes slightly, which is 2 ~ 5, and the cut hole slope is between 2 ~ 7

2. Equipment condition

**** the model of belt conveyor in the working face is dsj1200/150, 1# belt length * * * m, 2# belt * * * m retreats 400 m, and there is still 200 m left. Now it is necessary to remove the 2# belt head and 1# belt tail equipment, and extend the 1# belt tail. 2. The roadway at the belt conveyor head is 6 meters wide and 3 Meters, the anchor cable is supported by anchor bolts, and the lifting anchor bolts are set at the machine head

II. Equipment and material management

1. Prepare 6 5T guide chains, a number of 40 large chains, a number of 40 chain links, and other necessary lifting equipment

2. Before operation, check the support at the operation site to ensure that the support is safe and reliable; The sundries and floating coal at the operation site of the roadway shall be cleaned up, and all waste equipment shall be loaded and transported out to ensure the smooth route of the operation site

III. construction method

1. 1 #, 2 # belt equipment withdrawal:

(1) empty the two belts in advance, release them through the traveling block, and then lock the tensioner switch and the main motor feed switch and control switch. The full-time electrician shall go to the substation to handle the power failure procedures to ensure the power failure of 1#, 2# belts in the transportation lane

(2) at the appropriate position of the 1# belt tail, set a pair of big cards for the watch belt and the bottom belt respectively, and clamp the belt

(3) select the place with riveting card at the tail of 1# belt machine, pull out the string, remove the tail frame, hard frame and tail roller of 1# belt machine, and then drag them out with winches after loading

(4) remove the 2# belt transfer power supply. Remove the head motor, reducer, head frame, driving roller, traveling car and hard frame in turn. Large parts such as motor, reducer, head frame and driving roller are lifted with guide chain, and small parts such as tail hard frame, brain frame and idler are lifted manually. After loading, it shall be hauled out by winch in turn

2. Lengthen the tail of 1 # belt conveyor

(1). Add H-frame, belt rod and idler between the middle part of 1 # belt and the tail part of 2 # belt conveyor, effectively connect the two belts, rivet the card, and remove the big card

(2) tension the belt, support and straighten the supported belt frame according to the belt center line and roadway conditions, and transfer the adjustment and deviation during the power transmission test run

IV. safety technical measures

1. All operators must learn this measure before operation, and strictly implement the "Three Regulations" and "operation regulations" of the coal mine

2. Before operation, the sundries around the operation site must be cleared to ensure that the evacuation route is unblocked

3. Operators should obey the command of the team leader. It is strictly forbidden to command against rules and operate blindly

4. Before operation, all tools to be used in the process of over adding operation in order to seek profits must be checked, and the shift leader is responsible for ensuring the integrity and reliability of the tools

5. Operators must work at the place where the top support is intact, strictly implement the "knock on the top and ask for the top system", and if there is a place with incomplete support, they must support first and then work

in fact, this kind of deformation is very small. 6. Safety technical measures for belt equipment withdrawal:

(1) before removing the belt, first empty the coal on the belt and clean up the sundries

(2) when removing the belt, loosen the tensioning winch first, lock the switching power supply after the belt stops, handle the power failure procedures and assign a special person to monitor

(3) when removing the belt, select the place with riveting card to pull out the threading strip

(4) for heavy facilities such as disassembly, lifting head and active roll, reliable lifting fulcrum must be selected. During the lifting process, the team leader shall arrange special personnel to monitor and command

(5) when manually hauling equipment, operators should stand in a safe place selected in advance, and be commanded by a specially assigned person to rise and fall together and act in a unified manner

(6) when winch hauling is required, mobile signals should be set to accurately command the start and stop of the winch. The driver of the small winch must hold a certificate and take the post of high corrosion resistant alloy stage (1960-1969)

7. Safety measures for the transportation of equipment lifting trucks

(1) the lifting elevators, chains, rope sleeves and guide chains used in the inspection before lifting must be intact and reliable, and shall be jointly accepted by the safety officer, the shift leader and the shift leader. It is strictly forbidden to use unqualified tools for lifting operations. The load of the lifting appliance must be greater than the weight of the lifted object

(2) when using the guide chain lifting equipment, the guide chain shall be fixed with 40 type large chain, sealed with horseshoe ring and m20mm*75mm screws, and the screws must be fully screwed. The rope sleeve adopts 5-point steel wire rope, and the rope head is punched in front and back with supporting rope clips, no less than 3 pairs. It is generally adopted in foreign countries that the full-automatic clamping spacing shall not be less than 100mm., It is strictly forbidden to use split rings or incomplete large chains for hanging, and it is strictly forbidden to use lead wires for connection

(3) when lifting, lift vertically as far as possible, and do not pull diagonally