One, overview
According to the mine production arrangement, requirements on the belt roadway of bottom enlarging. The next step is to lay the belt, the roadway floor rugged cannot meet the installation requirements, to the next phase of work demand, the return air lane off the bottom, in order to ensure the safety during construction, the following safety measures are formulated.
Two, the construction sequence and requirements
1, the construction requirements
(1) construction used hand picks with the pick operation. If there is a hard rock bottom, need to move cannon, can put small drill. Due to the bottom enlarging according to a certain slope, the construction to the construction in strict accordance with the waist.
(2) at the end of the maximum depth of not more than 1.5m, width of the original roadway width.
(3) the gangue: artificial waste, used car transport to the ground.
2, construction sequence
When construction from lower to upper to bottom. Multi stubble construction. But between crop and crop to set the backstop, backstop height of not less than 1m, full face laying, prevent the falling rock.
Three, the safety technical measures
1, before the construction, checked by ventilation Cova inspector for construction within the scope of the roadway gas and other harmful gases, when the gas concentration reaches 0.8%, must stop working, prohibited personnel entering the construction site, to be hidden handle, no problems before construction.
2, each class before construction, must arrange the construction within the scope of the tunnel roof details check person, must find the net I work on waste rock, looking for top staff with a long handle tool station in intact roof, roof rock fall from looking for top staff position of not less than 1m, find the top one find the top, one view. Find a problem, immediately issued a warning the withdrawal of personnel, the roof stability and eliminate hidden dangers to confirm correct after operation, drop must strictly enforce the "tapping" system bottom section before construction, will "feel" throughout the whole process of the construction of the.
3, start construction before, must clean up the construction site to ensure smooth construction site posterior, posterior.
4, the construction must be before the construction of the pick, pick tools ready, wind pipe installation to the construction sites, and guarantee the normal use.
5, the construction process, if the passing pedestrians, must contact the construction personnel, confirm without any danger, can pass.
6, multiple cropping operations, but between crop and crop to set a good stop.
7, in the process of construction, prohibited personnel crowded, to prevent tools.
8, blasting attention and requirements
(1) at the end of easing move cannon, according to the site, once detonation cannot exceed 4 holes, each hole charge shall not be more than 100g, in the rocks in the line of least resistance is not less than 300mm. When the rocks in the line of least resistance is less than 300mm, no charge blasting.
(2) blasting construction site to check when the gas concentration, gas over 0.8 immediately stop work.
(3) drill must be full-time holer for drilling, team leader is responsible for eye.
(4) if there is a time after blast air methane overrun, must take immediate measures to reduce the number of times a charge, a gun or each hole, gas overrun operation is strictly prohibited.
(5): shooting guard position construction shooting guard position to change according to the actual, and must adhere to the Yan Xiang Zhi Xiang 100m, turning 75m. Guard personnel should strictly implement the "two to one" system (i.e. the blasting by shift leader arrange 2 people to all can enter the shooting location path Bu Gang, two men arrived at the guard position, back one told the class leader "Gang has good cloth, people have been evacuated net, can pull a gun," after the team can notify blasters crackers. Guards must be strictly responsible, and pull the warning line, hang warning signs, intercepting the pedestrian, prohibit any personnel into the shooting area). When shooting, the construction personnel evacuated to the line except the roof intact safe place (with shooting guard Diagram 3).
(6) when shooting should strictly implement the "three inspections" (check the gas before charging, blasting before and after blasting) and "three interlocking" blasting system (before shooting, blasters will alert card to team leader, by the group leaders sent warning, check the roof, no problem issue the blasting, command, and will carry a firing command card to Fireboss, Fireboss inspection of gas, do not exceed the standard, qualified, the blasting sign oneself carry over to blasters, blasters blasting whistles of a shooting, shooting, three cards to its origin owner). Blasters, tile inspection staff carefully check the concentration of gas in air flow, the gas concentration near the 20m range of up to 0.8%, no charge blasting.
(7) in before blasting, the construction site 20m, wrapped tightly with multi-layer plastic net.
(8) after blasting, the construction site gun smoke blown, blasters, tile inspection staff, squad group leader check roof, misfire, residual burst, such as a dangerous situation, the site must be addressed immediately, no hidden rear can arrange construction.
(9) the charge hole blasting shall be class. Under special circumstances, there is no medicine on hole blasting, shift blasters must be on-site handover, and down class blasters explain
11, pneumatic tools and management measures
1) the use of pneumatic tools before the inspection tool is sensitive and reliable, that can not be used to replace the.
2) in the construction process are found in pneumatic tools malfunction, timely notify the duty staff replacing, on duty at the end of the failure of the tool to the ground, is strictly prohibited in the underground repair.
3) construction, to the proper use of all tools, prohibited the use of incomplete tools, found that the problem timely repair, replacement.
12, the ventilation management measures
(1) during the construction of tile inspector must strengthen the gas inspection within construction in tunnel, Valet captain portable watt meter checking the gas, gas concentration reached 0.8% when, must immediately stop work, the personnel evacuated to the fresh air in the tunnel, no excess operation.
(2) XX sump or substation expansion and repair to the blasting, the construction site personnel must withdraw. The gun smoke cleared, notice from duty, can enter the construction.
(3) construction, airflow airflow abnormal, should immediately withdraw from the workers.
13, enhance the transportation management measures
(1) the driver into the work, should first check one slope "three block" device, check whether there are wire rope kinked place, broken wires inspection of wire rope, check the hook head is solid, if it is found that the above problems must be treated immediately.
(2) waste generated during construction with the tramcar transportation to the ground.
(3) when you drive with an acousto-optic signal indication, when driving through the red light, no pedestrian. Transportation, strictly abide by the "drive not people, pedestrians do not drive" system.
(4) while driving, winch wire rope is forbidden to stand force range.
14, during the period of construction, have team cadre footman, responsible for site safety, engineering quality and measures to implement the work, and timely to the mine scheduling and team personnel on duty to report the situation, such as unsafe phenomenon should be timely treatment.
15, the on duty after construction, must will float coal, debris and other clean up, do the work finished material net, keep the roadway of civilization and sanitation and posterior unimpeded.
Four, measures to avoid the disaster
1, in the construction, such as water, fire, gas and other accidents, should be promptly reported to the mine control room, the unified command of the control room, and organize the rescue. (of escape route diagram 4)
2, when the gas accident, fire, personnel to quickly wear self rescuer, as soon as possible into the wind tunnel, the escape route for:
The construction site to track down in a mining area, roadway, the bottom of main shaft hoisting shaft
The construction site, transportation roadway, the bottom of main shaft hoisting shaft
3, flood accident, the escape route for:
The construction site, a mining belt down the mountain, transports the big lane, the bottom of main shaft hoisting shaft
The construction site to track down in a mining area, roadway, the bottom of main shaft hoisting shaft
4, regardless of any disaster, should be immediately to the nearest and ore control room made contact, and report the location of the disaster, disaster, disaster affected area size. The valet captain or class (Group) who must immediately count, cut off the power supply. When conditions permit, organize personnel to prevent disaster development, reduce loss, self-help organizations. The condition does not allow, immediately organized personnel to choose the nearest, most secure route, rapid retreat. In the process of retreat, personnel must obey the command of calm, orderly, don't panic, shout, run, be organized, step by step the evacuation.
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