The rig installation must be fixed firmly, the oil level in the gearbox and fuel tank must be appropriate, and the safety shield and dust cover must be complete. The drill pipe should not be blocked or bent. If the drill pipe has cracks and serious wear, it is strictly prohibited to put it into use to prevent the drill pipe from being broken. Each part of the operating handle should be adjusted to the correct position. When debugging the drilling rig , each rotating part is required to operate normally, and the switch is started flexibly and reliably. The rig runs for 10 minutes under no load. After confirming that there is no problem, the drill pipe and the drill bit can be connected, the water source is connected, and the drilling is started by the driver. When drilling, the construction shall be carried out in strict accordance with the hole position calibrated by the measuring personnel of the Ministry of Defense and the azimuth, angle and hole depth specified in the construction measures. It shall not be altered without the consent of the surveying personnel. The ventilator must receive the gas pipe in advance and install the broom head at the drill site. After the drilling site is completed, the ventilation area must be sealed in time (the length of the sealing hole is not less than 3 meters), and the gas drainage pipe is connected for pumping. Operation method: Use the operating handle of the console to control the rotation and advancement of the drill pipe. When the operating handle is pushed forward by the neutral position, the drill rotates clockwise to drill or install the drill pipe; when the operating handle is pulled back from the neutral position, the drill rotates counterclockwise to remove the drill pipe. Pay attention to the following problems when loading and unloading the drill pipe: Align the threaded rod when connecting the drill pipe to avoid skewing. At the same time, a small amount of cotton yarn should be wrapped around the end of the thread of the drill pipe to prevent water leakage. When handling drill pipe should prevent CRUSH hard alloy sheet interposed flat drill bits and core barrel. When installing the drill pipe, the second root must be installed after the first root is installed. The operating handle that is pushed to the intake cylinder can control the drill bit to advance or retreat, and the drill bit moves forward when pushed forward, and the drill bit retreats when pulled backward. The quick-operating handlebar can be operated when it is required to advance or retreat quickly, and the operation mode is the same as that of the feed cylinder, that is, push forward and pull back. 节 Control the feed speed with a throttle valve. When the handle rotates clockwise, the speed increases, and when the counterclockwise rotates, the speed decreases. When drilling, the throttle valve can be adjusted according to the lithology at any time to increase or decrease the propulsion pressure. When the drill bit is sent into the hole and the drilling starts, the pressure should not be too large. It is necessary to lightly press the slow drill to avoid chipping or destroying the shift gear. After the drill bit goes to the bottom of the hole to work smoothly, the pressure is gradually increased. When drilling with clean water, water must be supplied before drilling. After the water returns, the pressure can be drilled. Ensure that there is sufficient flow and it is strictly forbidden to drill dry holes. When the rock powder in the hole is for a long time, the amount of water should be increased, and the pumping time should be extended, and the hole can be stopped after the hole is actually punched. When drilling, the driller should carefully observe the operation of the rig, that is, observe the water supply and drainage, the water supply and drainage of the borehole, and the vibration sound in the borehole. The distance must be accurately measured during the drilling process. Generally, the drill pipe must be measured once every 10 meters or when the drill is changed to verify the hole depth. During the operation of the drilling rig, pay attention to the observation of bearing parts, hydraulic oil, motor, gearbox, bushing, and vertical shaft gears. Do you have any over-temperature phenomenon and abnormal sounds? If problems are found, stop them immediately, find the cause, and deal with them in time. Pay attention to the following issues during the drilling process: If the rock is loose, the gang, the water in the water or the hole, the sudden increase or decrease of the water pressure, and the top drilling, the drilling must be stopped immediately, but the drill pipe must not be pulled out, and the water should be sent to monitor the water immediately. Report to the relevant departments and continue construction after taking measures. Page 2 / (2 pages in total) When drilling a harmful gas, it is necessary to stop drilling and strengthen the ventilation, and seal the hole with yellow mud, and report to the mine dispatching room. When there is a sharp increase in gas in the gas drainage hole, or suddenly, the coal cannon sounds frequently, and so on, it is necessary to take timely measures. (The team leader organizes personnel to evacuate to the wind lane according to the evacuation route and quickly to the company. Dispatch and defense work area report). When constructing the drilling head, it should be noted that the hole diameter matches the diameter of the drill bit to avoid jamming the drill bit. When temporarily stopping drilling, the drill should be retracted from the bottom of the hole to prevent the rock powder from getting stuck in the drill pipe; when the drill is stopped for more than 8 hours, the drill pipe should be pulled out. When transporting the drill, the front and rear personnel should contact each other and cooperate closely to prevent accidents. Pay attention to the following questions when proposing the drill: Before lifting the drill, it is necessary to measure the remaining ruler on the machine. The brake device, clutch device, lifting device and the lifting and unloading tool for the lift should be complete and easy to use, and the problems should be dealt with in time. Before lifting the drill, you must use clear water to punch holes and drain the rock powder. In the process of lifting the drill, the driller must work closely with other workers, the operation should be light and stable, and the brakes must not be slammed, fired, or overloaded. After the drill pipe is raised, the ends of the drill pipe should be wrapped with cotton thread to prevent the drill pipe hole from being blocked or the wire mouth being damaged. The gas drainage hole shall be completed after construction, and the hole shall be sealed in time according to the standard. Safety precautions and requirements: The construction personnel must learn the measures and strictly follow the measures. To enter the site construction, the person in charge of construction and the safety guardian must be clarified, and the person in charge of construction should explain the work contents, steps, personnel division and construction safety precautions. Upon entering the construction site, the construction personnel must wear insurance protective equipment. It is strictly forbidden to laugh, play, and affect the attention of the work during work. At the time of starting, attention should be concentrated, and the hand should be kept from the button and the eye should not leave the rig. The action should be accurate, timely and rapid. For mechanical speed governing rigs, under normal circumstances, the speed of the rig should not be changed arbitrarily. When the speed is adjusted, the power must be stopped first, and then the gearbox stops running and then shifts. When the machine is running, it is forbidden to directly brake the running part of the machine with hands, feet or other objects. It is forbidden to put tools or other items on the rig and pump motor protective cover. If a large amount of gas is poured out during the construction drilling process, it should be immediately withdrawn (the team leader organizes personnel to evacuate to the intake lane according to the disaster avoidance route, and promptly report to the company dispatching and defense work area). Before work, the work situation and various data, such as drilling angle, footage, and equipment operation, should be recorded in a comprehensive and accurate manner. Strictly implement the on-site handover system. The team leader and recorder should record and sign the class according to the record form. After the completion of the drilling, all kinds of after-treatment work should be done under the command of the captain (such as the relocation of the drilling rig, maintenance and repair, replacement of the drill pipe, joints and couplings, quality acceptance of the drilling and transfer of relevant materials, etc.) Prepare for the next construction. The inspectors of the tile must strictly implement the "on-site handover class", "gas inspection tour", "one class three reports" and other systems, and it is strictly forbidden to have empty class, missed inspection, false inspection, false inspection and gas overrun. When the following prominent signs occur, the drilling must be stopped and reported to the through-work area and the dispatching room. The drilling plan can be re-constructed after the treatment plan is taken out: 1) Acoustic signs: cracks during the deformation of the coal (rock) layer , snarling thunder, machine gun sound, coal cannon, sound from far and near, from small to large, there is a short, continuous, and the length of the interval is also inconsistent. The coal (rock) wall is vibrated and impacted, the top plate is pressed, and the bracket is broken. (2) Silent omen: the working face pressure increases, the coal (rock) wall is squeezed out, the piece helps to slag, the roof sinks or the floor bulges, the coal (rock) layer is disordered, the coal is dull and dull, the coal quality It becomes softer, the gas is suddenly big and small, the coal wall is cool, and there are top drills, stuck drills, and spray gas when drilling. Test Liner Paper Machine Toilet Paper Machine,Test Liner Paper Machine,Toilet Paper Making Machine,Double Layer Paper Machine DanDong GaoXin Dryer Manufacturing Co.,Ltd , https://www.gaoxinpapermachine.com
Safety technical measures for construction of total return air contact tunnel
Preparation before operation: