Technical safety measures for opening of ××岩巷工程
I. Overview
1. The position, section and support form of the new opening roadway;
2. Description of the support form of the opening (original) roadway, surrounding rock pressure, appearance, various pipeline laying, etc. (attached roadway plan).
Second, safety technical measures
1. Roadway reinforcement method: reinforcement method and reinforcement length of the roof reinforcement at the opening of the roadway.
2. Equipment (lineage) protection: All electrical equipment and various pipelines around the opening position should be removed before the opening. The protection method and protection length should be explained.
3. Middle waist line: The opening must have the middle waist line sent by the local survey department.
4. Opening (5m into the nose) blasting requirements: specify the maximum cycle progress and maximum charge. If necessary, use manuscript excavation to prevent vibration from surrounding rock or roofing caused by shooting.
5. Regulations for the placement of guns: All the roadways that communicate with the open roadway should be set up with special personnel or guards, railings, and positions (with photos).
6. Gas management system.
7. Other requirements.
Through fault safety technical measures
I. Overview
The section of the roadway, the form of support, and the elements of the fault are accurately described (with a flat section).
Second, according to the geological and hydrogeological contents of the "Safety Mining Notice" of the Geodetic Survey Section, combined with the actual situation of the working surface, determine the corresponding form of support.
Third, safety technical measures
1. Advanced drilling requirements (design, approval, release notice, construction unit execution, etc.).
2. Exploring the eye: 10m from the fault fracture zone, adhere to the principle of side exploration and exploration, to determine the number, location, depth, angle and other parameters of the eye (with three views).
3. According to the lithology of the working face, the roof management, blasthole arrangement, blasthole charge, blasting manual and cycle progress shall be clearly defined (with photos).
4. Prevention of roofing method: If there is a risk of roof fall in the blasting, write the specific construction method to prevent roofing.
5. Advance support use method.
6. Detection and treatment of harmful gases: When the roadway is adjacent to the fault, the method of checking and handling harmful gases should be clearly defined.
7. Prevention of water: If the fault geological structure is rich in water, special water prevention measures should be formulated.
8. Fault observation: During the construction, the changes of surrounding rock should be observed frequently, and abnormalities should be reported and processed in time.
9. Other requirements.
Adjacent safety technical measures
I. Overview
Description of the road surface and the adjacent roadway (with plane and section).
Second, safety technical measures
1. Middle waist line: strictly in accordance with the mid-waist line construction given by the local survey department.
2. Forecasting the adjacent position: The geodetic survey department must issue the exact position of the starting and ending point with the adjacent roadway less than 20m. The construction unit will start from the “adjacent notice†of the grounding test section, and the team will set up a special person to master the construction progress and fill in the map in time.
3. Shooting regulations: When the distance from the adjacent roadway is less than 20m, all the roadways that are connected to the adjacent roadway should be set up with special personnel to stand guard or set up warning signs, railings, and standing positions (with photos). Do not dismiss the post without authorization.
4. Hazardous gas inspection regulations.
5. Reinforcement of adjacent roadways: If reinforcement is required, the reinforcement position, reinforcement method, and reinforcement length are specified.
6. Water treatment in adjacent roadways: If there is water in the adjacent roadway and affects safety, it shall be excluded in time when the distance from the adjacent roadway is less than 20m.
7. Sight-seeking requirements: When the distance from the adjacent roadway is less than 10m, the principle of first dig-out must be strictly examined to determine the number, location, depth and orientation of the eye-seeking (with three views). Before each shot, the gunner and the squad leader must check that the depth of the eye is in compliance.
8. Other requirements.
Safety technology measures for rock tunneling
I. Overview
The description of the supporting form, supporting state, various equipment pipelines, gas, ventilation, and water accumulation of the transparent (through) roadway, with plane and sectional drawings.
Second, safety technical measures
1. Middle waist line: Strictly according to the construction of the middle waist line given by the local surveying department, the construction unit will set up a special person to map in time and master the remaining distance.
2. Prevention water: If there is water in the through-passage, it should be excluded before the penetration of 20m.
3. Roadway reinforcement: The geodetic survey section must give the location of the tunnel opening in advance, and the construction unit should carefully carry out reinforcement (reinforcement method and reinforcement range) before the penetration of 20m.
4. Equipment (pipeline) protection: All electrical equipment and various pipelines around ××m around the location of the opening shall be removed before the penetration. Measures that cannot be removed shall be protected (clearly stated).
5. Ventilation management (the ventilation of the roadway is the local fan ventilation): Before the roadway runs 20 meters apart (50 meters in the comprehensive tunnel), one must stop the tunneling. The working surface of the tunnel must be kept properly ventilated, fences and warning signs should be set, and the inspection should be carried out frequently. The air condition of the air duct and the gas concentration in the working surface and its return air flow must be dealt with immediately when the gas concentration exceeds the limit.
6. Stationary regulations (with photos)
7. Exploring the eye (with three views).
8. After blasting requirements: clarify the maximum cycle progress and maximum charge, minimum resistance line. If necessary, manuscripts and winds will be excavated.
9. Gas and support inspection: Before the penetration distance of 20m, before the blasting of the working face of the excavation, it is necessary to send a special person and the gas inspector to the working face of the excavation to check the gas concentration in the working face and its return air flow. When the concentration exceeds the limit, the work on the excavation face must be stopped first, and then the gas should be treated. The working face of the excavation can be blasted only when the gas concentration in the two working faces and its return air flow is below 1.0% and the support is reliable.
10. Three-person interlocking instructions.
11. Measures to implement supervision: The construction units, ventilation zones, inspection departments, and related business departments that are in charge of the work shall be implemented on the spot to implement and supervise the implementation of the measures.
12. Work arrangements before the ventilation system is not adjusted and stabilized after the penetration.
13. Communication requirements for contact
14. Other regulations.
Safety technical measures for tunneling in rock roadway
I. Overview
1. Engineering description. The basic conditions of roadway and old roadway are described, and the spatial position of the two roadways is described (with plane and section view).
2. Describe the location, length, section, support form, water accumulation in the old lane, whether there is any supplementary water source, and the types of harmful gases in the old lane.
3. Relative distance, estimated phase penetration time (with photos).
Second, safety technical measures
1. Middle waist line: strictly in accordance with the construction of the middle waist line given by the local surveying department. The construction unit will set up a notice from the grounding test notice, and the team will set up a map in time to grasp the remaining distance.
2. Prevention and control of water: The geodetic survey department timely predicts water and water damage, and predicts water quantity and water pressure when there is water accumulation. The water line, the water line and the warning line are marked on the drawings, and the water prevention plan and measures are formulated, and the construction unit implements it.
3. Exploring the eye (with three views).
4. Signs of water inrush (when there is water in the old lane).
5. Ventilation: Ventilation management and exploration and treatment of toxic and harmful gases after the exploration of the eye and the passage of the roadway.
6. Anti-corruption measures for the old lane: According to the situation of the top and coal , the maximum cycle progress, the maximum charge, the minimum resistance line, etc., are required.
7. Implementation and supervision of measures.
8. Other requirements
Technical Measures for Preventing Mistaken Coal Safety in Rock Roadway Excavation
I. Overview
1. Gas geological conditions, coal seam occurrence stability and structure of the working face.
2. The thickness of the rock pillar between the roadway and the coal seam (with a section).
Second, the middle waist line and the prospecting regulations
1. Middle waist line: The ground survey department sends the middle waist line according to the design, and the construction unit strictly follows the middle waist line construction.
2. Exploring the eye: clearly determine the number, location, depth, and orientation of the eye (with three views). It is strictly forbidden to put medicine and shoot in the eye. The construction unit must strictly implement the principle of side exploration and excavation.
3. When any one of the tunnels explores the coal during the excavation process, the construction unit should immediately stop the excavation and notify the relevant departments.
Third, safety technical measures
1. Strengthen the regulations on gas management and monitoring.
2. Strengthen ventilation and ensure the smooth flow of the return air system
3. Measures to strengthen the management of electrical equipment.
4. Advanced drilling requirements (design, approval, release notice, construction unit execution, etc.).
5. The construction unit observes and reports the abnormal situation.
6. Relevant regulations on shooting and evacuating people.
7. Highlight the omen.
8. Avoidance routes.
9. Other requirements
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