MT/T 957-2005 Technical requirements for measures to prevent outbursts by advance drilling in coal tunneling working faces
Some standard content:
ICS 73.020
Preparation number: 16788—2005
Coal Industry Standard of the People's Republic of China
MT/T 957—2005
Technical specifications of outburst prevention hy advance dcgassing holcsin coal roadway driage face
2005-09-23 Issued
National Development and Reform Commission
2006-02-01 Implementation
MT/T957—2005
The standard is based on the model research safety process issued by the National Safety Production Supervision Bureau and the National Coal Supervision Bureau, and the European Coal and Gas New Investment Group (2005) formulated by the Ministry of Raw Coal Industry of the People's Republic of China, and is formulated based on the current situation and development trend of the site use
Appendix A of this standard is normative, and Appendix B is informative. The standard was proposed by the Science and Technology Development Department of the China Coal Industry Association. This standard was drafted by the Coal Mine Safety Standardization Technical Committee of the Coal Industry: The drafting unit of this standard is the Black Carbon Research Institute. The main contributors to this standard are: Xu Sheng, Xue Lin, Zou Jiaoji, Zhang Qinghua, 1 Fan Guo
Technical conditions for advance drilling of coal tunnel excavation working face
Prevention and control measures
This standard specifies the certification, implementation and acceptance of advance drilling prevention and control measures for coal tunnel excavation working face with secondary danger. 2 Definitions
This standard adopts the following definitions:
Advance drilling advancingreleasingdhllagMT/T 957—2005
Before the large-scale mining, drill a certain digital display from the working face to the front media, and maintain a certain distance before the completion, to achieve the normal elimination or reduce the actual cold elimination of a local station complete fault.
3 Prevent sudden collapse
Left coal laneway overtaking the working face: the coal main performance worker train rushed to the front station, which played a role in pressure relief and natural gas discharge. The pressure and gas pressure of the baking parts were greatly reduced, so as to eliminate or reduce the danger of inflammation and rot. 4 Station lead design
4.1 The design document contains the following measures before the drilling teeth are implemented: The design of anti-burst measures includes the following: - Leave a plan view of the holes before drilling, do not use the holes according to the back view, and indicate the drilling guide number and size in the figure; - Include hole card, opening angle or orientation, effective depth, starting diameter, etc. - Equivalent table: The design is based on the effective hole card, and the design should pay attention to the safety issues that need to be explained in the steps:
of the construction site, bzxZ.net
4.2 Warning in the design documents
When the design is used without a reference to prevent energy dissipation, a practical anti-hazard work must be carried out. This design must be carried out in accordance with the specifications. The design document should be handled according to the following procedures:
Approval: The design document of the advance drilling design should be approved by the relevant departments step by step, and the approval should be signed by the design personnel, the technical personnel and the technical personnel. The design document after approval should be submitted to the execution department for execution and the supervision department for supervision.
Modification of the design document: When the design of the previous station needs to be modified due to changes in the supporting conditions, the original design department shall make changes and the design shall be revised and implemented. 4.3 Principles of drilling design
4.3.1 Applicable conditions
Advanced drilling is suitable for coal seams with sudden industrial hazards. 4.3.? Determination of the number of boreholes designed
The specific length of the drilling layer must be determined before the design number. When the actual number changes slightly, the design parameters of the drilling H should be adjusted in time. The relevant design parameters should meet the following requirements: 1. The number of holes should be arranged in the soft stratification of the coal layer as much as possible. When the soft stratification is not obvious or there is a thick layer, it should be arranged in the relatively soft stratification. In the case of coal seams with thick soft strata, the number and quantity of holes should be increased. 1) The control specification of the non-inside station should be evenly arranged, and the two sides of the hole can be recorded under the construction of the working face.
1) Control specification: The control specification of the front hole should be determined according to the actual number of dangerous layers, and the final hole should be pulled to the bottom of the lane and gradually controlled. 2.~: It must be controlled in time: outside the river, the "advance station" should be arranged into one or more rows according to the actual situation. The control specification of the advance drilling should be evenly arranged. It is necessary to add a series of short stations to ensure that the control of the advance drilling is effective (as shown in the figure?
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thousand hole position straight diagram
figure: advance opening arrangement diagram
drilling hole arrangement before the batch of high-risk drilling H effective full room price to determine the effective drainage policy must be determined through actual creation station hole flow A single method should be followed in time. The number of holes to be staggered before the station is determined according to the drilling control range and the station hole interval. The allowable hole ear diameter should be as flexible as possible. The staggered hole with a diameter of C~120-m can be used. If the geological conditions change, the area can use a 4?1mmrm drill hole. When using a large number of drilling tools, special drilling equipment must be used to implement safety measures. The hole can be ahead of 1. The distance between the working surface should not be less than 3m. When the work surface is changed or the work surface is placed in front of the spot, a small "mm" advance hole or other preventive measures must be taken to form a safety enterprise after 1 working surface. The user can adapt to the normal case. The construction is not effective before the station is established. The actual situation of the case can be used to carry out a certain time inspection and rectification. 4.3.3 Supplementary measures After the implementation of the advance drilling, the factory must conduct an inspection on the effectiveness. If the additional measures are ineffective after inspection, other supplementary measures must be taken to supplement the pin holes: supplement the actual implementation of the technical plan or in the overall pin hole work plan, the design requirements are provided. 4.3.2 Construction safety measures In the advance hole design, the timely implementation of the safety technical measures must be implemented to ensure the safety of the personnel during the soil pin hole drilling process. 5.1 The new production standards must be in accordance with the design state data before the lead rises. 5.2 Before the construction of the advance drilling, it is necessary to strengthen the work support, build the center frame, do not go up the mountain, and work on the wall of the hole strictly without fire protection nets, wooden boards, bamboo and other dangerous work surfaces to prevent the rock from crossing and causing the death of personnel or equipment. etc.,
MT/95/-205
5.3 Before drilling, the implementation of safety technical instructions should be ensured, including preventing coal flying in the room, supervising the delivery of boards, gas explosion, suppressing spraying, checking ventilation, ensuring smooth flow of energy, ensuring safety of workers and alerting each other before drilling, etc., and the use of special equipment to prevent the station from exceeding the speed limit, observing the signs of concave drilling, checking the transmission, personal protection, etc., and the safety measures such as negative pressure stimulation should be in place.
5. When drilling, the workers should record the various abnormal phenomena on site, the actual construction parameters of the drilling equipment, the time, the personnel, etc. (see the international standard, and the original record should be made later. 5.5 During construction, the construction department should observe the signs of negative pressure. When a sign occurs, the personnel must evacuate to a safe place as soon as possible. 5.6 Fanshanguang station. Try to drain the powder in the hole as much as possible and check the wax damage of each drill hole. When the hole phenomenon is found, try to pass it in time to ensure the opening of the station.
5 Construction equipment
The single worker of the advanced station can be equipped with the actual conditions of the coal seam and the seabed, and the drill pipe head pipe equipment with matching matching can be tested and tested, and the explosion-proof performance of each electrical equipment should be regularly tested. , Noto and other equipment should be prepared. When mining wind power, the safety equipment in front should be changed and used. The new one should be used! The matching of the drill anti-powder force should be ensured. 7 Station hole acceptance and teaching facilities
7.1 The mine truck should be on time to include the anti-burst inspection system before the drilling. The advance hole efficiency project must be verified by a dedicated person, and the acceptance inspection must be carried out. During the actual operation, the filter release results must be inspected. Other special inspections should be carried out from time to time, such as adding sound, checking the hole opening position, angle, depth and friction effect of the hole, etc. After the advance hole is completed, the construction department should check the number of sets of holes and the work plan of the heating system.The drilling arrangement situation of the figure is shown in the figure. If there is a big difference between the actual construction situation and the design situation, the hole design should be carried out before drilling to effectively control the work.
MT/T 957—2005
(Normative rigid recording)
The method of estimating the effective discharge radius of the advance drilling emulsion is soft stratification. The total length of the hole is 2m and the length of the hole is 7m. See 1
2. The length of the hole is 1
A.3. After the hole rate is measured, the missing holes are measured. Every time the hole is missing, it is determined once.
A4 in the edge of the meal at the center of the hole product at the fold 1 parallel volume leading to the selection of the state before drilling (starting from the examination case of super ceremony effective emission half of the sales hole diameter), in the twists and turns of the new pass, also Ling station hole Chang'an, the appearance of the chaotic product Si gushing industry volume changes 5 super station, in the international - measurement continent book with Si full industry volume, A, after playing the super smart hole hall measured 2h
A7 after the system mountain each hot volume hole 5 Si gushing out of the people will inevitably drop: the result is that the gas volume of the Dingzhou English hole before drilling increases, the financial measurement hole at the super active support within the effective emission radius, in line with this article in the major project this rule of this hole distance through the front sales of the feeling selection The distance is the effective "diameter of the super-station hole:
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National A, 1 drilling guide layout method
T working surface name:
layer thickness:
construction personnel
let the work efficiency
Appendix B
(information state ticket:
superior drilling five construction record sheet
1 and position:
construction work
call
to observe the description
name of personnel
MTT357—2005
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