Safety technical measures for preventing roof
1. After firing, firstly, at least three people, including the gunner, the team leader and the inspector, check the gas and knock on the top. Use a long handle tool to pry the loose coal (rock) block. After handling the safety, you can start working.
2, the shed should meet the quality standards, when the height of the roof is more than 0.4 meters, you must hit the raft, the top should be firm.
3. The material and shape of the excavation support must be specified in the operating procedures and executed after the approval of the engineer. The support of the roadway shall not be arbitrarily changed without the consent of the engineer.
4. Where the tunnel is directly ventilated, the roadway to be transported shall be maintained and repaired by the working face operator, and there shall be no broken beam phenomenon. Otherwise, the working face operator shall strictly prohibit the footage to avoid collapse and blockage.
5, over the old air defense roof collapse measures:
1) If there is an old-fashion phenomenon, you must first find out the location and direction of the old space and fill it in.
2) On the shed above the old sky, the bottom beam must be placed, then the double shed is lifted, and the top is hit on the bottom beam.
3) There must be a double-sided door at the intersection of the roadway and the reopening of the roadway. The length of the door must be more than 0.5 meters longer than the width of the newly opened roadway. At the same time, each lifting shed should be no less than four tops, two supports. cylinder.
4) All excavation stops are not allowed to operate in violation of the rules. When the coal seam is broken, the front beam must be used.
5) Where the new opening of the underground roadway must have operating procedures and safety technical measures, there must be continuous measures when the roadway is connected.
(2) Roadway repair and anti-counterfeiting measures:
1. Check the bracket and the safety of the roof before starting the work surface. It is safe to start working.
2. When brushing and repairing the roadway and continuously removing the bracket, it must be carried out from the outside to the inside. When the bracket is erected or removed, the rack must not be removed before the rack is completed. When repairing a sloped roadway, the driving must be stopped. Keep a good stop when loading.
3. In the collapsed roadway, the repairing staff cannot be carried out separately. The bad roadway should be assigned with experienced workers. Only one one can be dismantled, and two can not be removed continuously.
4, before the top of the raft, first stand in a good and safe place with a long handle tool to loosen the rock block, after proper handling, climb the raft along the roadway, lay a temporary hat and protect the top bar, then stand Hit the raft in the center of the stand.
5. When crossing the old lane and restoring the old lane, you must make a pointed forward and adopt the ground beam type.
6. When serious roadways need to be repaired, construction safety measures must be prepared.
(3) Measures for preventing roof fall in masonry roadway:
1. Strengthen the management of front-exploration support and strictly implement the roof management system.
2. Promote the temporary support operation mode of anchor spray and the support of mining I-beam.
3. Within 5 meters of the working place, materials and other things are not allowed to be stacked.
4. When the masonry support, the arch tire should be flattened, not skewed, the top should be stable and reliable, and the center should be replenished when the large-span arched tires are built, and the top pillars should be reinforced.
5, after the completion of the arch, the minimum time for the demolition is not less than 48 hours.
(4) Anti-counterfeiting measures for mining face
1. Requirements for the mining face:
1) Support quality monitoring of all brackets. The initial support force of the hydraulic bracket must meet the quality standard requirements. The defective unit is strictly prohibited to be used on the working surface.
2) Before the mining face is recovered, it must be approved by the mining engineer in accordance with the design rules of the mining area design, and organize the workers and management personnel to study and discuss, and implement it before the operation. If in the production process, due to changes in conditions or other reasons, it is necessary to propose modifications and supplementary measures, and implement them after approval by the mine engineer.
3) All operations of the working face must be handled in accordance with the regulations. It is strictly forbidden to operate illegally.
4) Strictly implement the handover system, acceptance system and accident analysis system.
5) All the safe exits of the return airway, the slippery road, the bracket specifications should be kept intact, and always keep unimpeded. The advanced support should not be less than 30 meters.
6) All safety exits of the working face must be strengthened within 30 meters. The height of the roadway should not be less than 2 meters and the width should not be less than 1.4 meters. The safety exit must be maintained by a special person.
7) Measures before the old face of the work surface has not fallen:
1 The cutting face of the working face must be strengthened with the support of both ends, and the end bracket must be used.
2 The first time the working face is put on top, the squad leader, the security inspector, and the class manager must take the class to the old top to determine it. The follow-up personnel must supervise the inspection and take urgent measures according to the pressure changes in the working face.
2. Measures for mining face support and coal mining support:
1) Before each mining surface is mined, the supporting parameters must be reasonably designed according to the pressure of the working face, and the specific pressure test should be carried out on the soft bottom plate.
2) The top surface is broken and the work surface with pseudo top is covered with dense bamboo curtain (skin). After the top is hollowed out, the raft must be topped. And take special support measures to prevent the emergence of push-type roof.
3) Regardless of whether the top plate is good or bad, it is necessary to move the frame in time according to the operating regulations after cutting the coal.
4) The working face bracket must be three straight, one flat and two smooth.
4, safety exit
Safety exits on the work surface must comply with the operating regulations, and materials and other obstacles must not be stacked.
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