(4) Charging blasting is strictly prohibited under the following circumstances: A.
The transportation of blasting equipment shall meet the following requirements: (1) the transportation of blasting equipment in the tunnel and auxiliary tunnel shall meet the following requirements: A.
The safe distance for evacuation shall be: A.
(5) The road surface at the ballast unloading place outside the tunnel shall be made into an uphill section of 4%, and retaining wood shall be set at the edge from the ballast pile.
No warning, okay.
In case of thunderstorm, the blasting operation shall be stopped and the dangerous area shall be evacuated quickly.
(3) Set up obvious signs and assign special personnel to guard.
The construction of portal works shall comply with the following provisions: (1) the subgrade, side and front slope sections of the portal shall be excavated from top to bottom.
15.
Corresponding protective measures shall be taken for blasting operation according to the specific conditions of terrain, geology and construction area environment.
The drilling operation shall comply with the following provisions: (1) before drilling, the safety state of the working environment shall be checked, and the drilling operation can be carried out only after the pumice on the excavation surface is removed and the misfire is treated.
Detonators and explosives shall be transported separately, and electric detonators shall be transported in insulated boxes..
After the earth rock excavation at the end wall, the loose rock stratum shall be supported.
(6) Reversing in the tunnel shall be commanded by a specially assigned person.
There is quicksand and quickmud without treatment.
Blasting materials shall be extracted by the person in charge of blasting loading according to the one-time demand, and shall be taken as soon as they are used.
The remaining materials after blasting shall be returned to the warehouse in time after being checked by a specially assigned person.
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(4) Do not continue drilling in the disabled eye.
4.
If it is necessary to blast at night, effective safety measures shall be taken.
Trackless transportation shall comply with the following provisions: (1) the limited speed of transportation vehicles shall comply with the provisions in the table below.
2.
It is strictly prohibited to detonate at any place before all warning and protection work are completed.
Ballast loading and transportation shall comply with the following provisions: (1) the clearance of excavation section shall meet the safe operation of ballast loading machinery; (2) When new mechanical equipment is adopted, the line laying standard shall meet the requirements of mechanical gauge.
The following protective work shall be done before initiation: (1) initiation shall be supervised and commanded by the personnel on duty; (2) Warning personnel must be set around the warning area; Warning range: small charge blasting shall be 200m away from the blasting site, and the warning distance of blasting with large charge shall be determined through calculation; (3) People and livestock in the warning area shall be evacuated, and reliable protection shall be provided for those construction machines and tools that cannot be evacuated; (4) In the construction section with vehicles and ships passing through, the blasting time shall be determined by contacting the relevant transportation department in advance.
(2) When several construction sites in the same construction section are blasted at the same time, they must be under unified command.
5.
insufficient lighting B.
4.
When the distance between two opposite excavation faces is only 15m, only one excavation face is allowed to penetrate, the other end shall stop working, remove personnel, machines and equipment, and set warning signs at a safe distance.
The blasting equipment processing room shall be 50m away from the hole.
(3) All construction equipment and machinery close to the vehicle gauge shall be equipped with low-voltage red flash lamp at its outer edge to display the gauge.
not less than 200m in the single head roadway; B.
The earthwork works shall be completed at one time, and the excavation personnel shall not overlap up and down.
Ventilation and smoke exhaust must be carried out after blasting, and inspectors can enter the excavation surface for inspection only after 15min.
Open fire shall not be used for blasting in the tunnel.
(2) The support of rock drill shall keep the stability of the ballast pile when drilling holes on the ballast pile.
Irrelevant personnel are strictly prohibited to enter.
(2) When the blasting line, fuse, detonating cord, etc.
(2) During the operation of ballast loading machinery, no one is allowed to pass through within its swing range.
The initiation shall comply with the following provisions: (1) when there is lightning and thunder nearby or clouds and rain diffuse, and lightning may occur suddenly, it is strictly prohibited to use electric detonators for initiation.
Blasting shall not be carried out in foggy days, dusk and night.
12.
The construction of tunnel door and end wall shall comply with the following provisions: (1) the scaffold and working platform of masonry engineering shall be firmly erected, and handrails and railings shall be set.
16.
b.
The excavation of double track full section shall not be less than 500m.
2.
it shall be escorted by a specially assigned person, and other personnel shall not take it.
3.
Excavation of double track upper section shall not be less than 400m; E.
8.
13.
9.
6.
2.
4、 Ballast loading and transportation 1.
10.
The charging shall comply with the following provisions: (1) before charging, non charging personnel shall evacuate from the charging place; Fireworks are prohibited in the charging area; After charging, the number and location of charging shall be checked and recorded; (2) Metal containers shall not be used for charging; (3) The primary explosive package shall be made when charging on site.
3.
For tunnel excavation, corresponding safety technical measures shall be formulated according to various construction methods and geological conditions.
(3) When drilling with an electric drill, do not guide the rotating drill rod by hand or deal with the clamped drill rod with an electric drill.
Charging and drilling shall not be carried out in parallel.
(2) The tunnel depth shall be greater than 10m, with an intersection angle of 60 degrees with the tunnel center line, and two external doors shall be set.
(4) When the vehicle is running, overtaking is strictly prohibited; When meeting, the safety distance between the two workshops shall be greater than 20m, and it shall be increased when the visibility in the tunnel is poor.
During blasting, the blaster shall carry a flashlight and set fault lighting.
14.
(2) Loose dangerous rocks on the hillside above the side and front slopes shall be removed before excavation; Regular inspection shall be conducted during construction, and loose dangerous stones must be removed immediately.
The handling of misfire shall comply with the following provisions: (1) it shall be handled by the original druggist on the spot; When dealing with misfire, the guard shall not be removed; In case of special circumstances, with the permission of the construction director, it can be handled in the next shooting or rest; Obvious signs shall be set at the misfiring position, and no personnel shall pass within 5m around it.
(2) Safety net shall be set during the construction of end wall above the camber line to prevent personnel, tools and materials from falling.
(3) The primary explosive package shall be reinstalled after the blockage is removed.
3.
(5) A parallel hole can be drilled at a distance of not less than 0.6m from the misfire to induce explosion.
(6) Ammonium nitrate explosives can be diluted with water.
Ballast loading shall comply with the following provisions: (1) before and during ballast loading, the stability of surrounding rock on the excavation surface shall be checked.
Blasting operation shall meet the specified requirements.
C.
(4) Do not drill holes in residual holes.
7.
in the blast hole are checked to be intact, the lead or wire can be reconnected and detonated.
After blasting, the construction can be continued only after the loose stones on the side and front slopes are removed.
Explosives that produce a large amount of harmful gas shall not be used for blasting in the tunnel.
When loose rocks or signs of collapse are found, they must be treated before loading.
Not less than 50m between adjacent tunnels, cross passages and cross tunnels; D.
The scaffold shall not obstruct the passage of vehicles.
A large number of karst cave water and high-pressure water gush out, which has not been treated.
2、 1.
The handle of the detonator shall always be kept by the blasting team leader.
D.
(4) The processing room shall be set in solid surrounding rock, and railings shall be set.
If the distance between the portal and the excavation surface is more than 1000m, a processing room can be set up in a proper place in the tunnel, but the following provisions shall be met: (1) the storage dosage is limited to the dosage on duty.
In case of poor geology, reinforcement measures shall be taken for side and front slopes.
The blasting design scheme and corresponding technical measures must be prepared according to the requirements of the current national standard blasting safety code (GB6722).
3、 The blasting operation shall comply with the following provisions: 1.
(5) When blasting in the tunnel, all personnel must evacuate.
No less than 100m in adjacent upper and lower tunnels; C.
(3) Vehicles and personnel are not allowed to pass when lifting materials.
The inspection contents include: whether there is misfire; Whether there are residual explosives or detonators; Whether the roof and two sides have loose surrounding rock; Check whether the support is damaged or deformed.
E.
the surrounding rock on the excavation face is broken and has not been supported.
11.
2.
Limited speed of transport vehicles (km / h) normal driving in project operation section, non operation section and tunnel section 102020 with tractor 51515 passing 51010 (2) slow down signs shall be set at the entrance, level crossing and narrow construction site, and special personnel shall be assigned to direct the traffic if necessary.
