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2. Strengthen the construction management of the support to ensure that the technical support of the support quality should be carried out before the construction. The construction process should be strictly checked and accepted to ensure the construction according to the quality standards and requirements of the support design to ensure the construction quality and ensure the support. Achieve the desired results.
When the roadway tunneling passes through complex geological sections such as broken belts and water-spraying areas, special support measures such as pre-exploration brackets and interlocking sheds should be used according to the situation to improve the support capacity of the brackets.
Timely discover and replace the brackets with unqualified or damaged quality, and carry out roadway repair and bracket replacement work according to the construction safety regulations; ensure the support depth of the anchor rods and anchor cables, the reasonable spacing of the supports and the connection between the brackets, and ensure the support ( The overall stability of the bracket) prevents the occurrence of a roof accident.
3. The air-top protection and excavation work face is strictly forbidden to work on the empty roof. The support within 10m from the heading face should be reinforced before blasting. The truss collapsed or collapsed bracket must be repaired first; no support is provided for the hard rock layer. In the case of protection, safety measures must be established.
4. Implement the "knocking and asking top" system Strictly implement the relevant requirements of safety regulations, conscientiously implement the "knocking and asking top" system, timely discover the slippery and live rock in the surrounding rock, and carefully remove the working face and the surrounding rock in the roadway. Pumice and dangerous stone.
"Knocking on the top" must be carried out from the outside to the inside. When "knocking to help the top", other members of the customs are not allowed to enter the work surface.
5. Closely monitor the changes of geological strata and surrounding rock pressures. Detect the surrounding rock conditions of the roadway by various means of detection, judge the stability status of the surrounding rock, and follow up the support measures in time.
Before exposing the old airspace or before the dangerous mineral deposits, the safety measures for exploration should be prepared, the safe rock pillars should be reserved, and the operations should be carried out in strict accordance with the approved procedures. Special monitoring methods (such as roof separation observation, roadway surrounding rock deformation observation, etc.) can be used in the roadway with large impact or large displacement of the roof. This provides a basis for the development of roof control measures.
6. Correct construction procedures (1) When removing the bracket and brushing the roadway, it must also be carried out from the outside to the inside. Before removing the bracket, the brackets at the front and back of the work site should be reinforced.
(2) When the bracket repair work is carried out in the single head roadway, the roadway should stop excavating or engage in other work, so as to prevent the roof from falling and blocking.
(3) The work of erecting and removing the brackets shall be carried out continuously. One unit shall not be suspended before it is completed. If it cannot be continuously carried out, it must be completed before the end of work.
Control measures for roof accidents in mine roadway
1. Fully maintain the integrity of the surrounding rock. According to the geological conditions of the surrounding rock, the use of the roadway, the service life and other conditions, the rock stratum, the direction of the roadway, the shape of the cross section of the roadway, the section size and the scientific support form should be reasonably designed. According to the advancement, the damage to the surrounding rock should be avoided as much as possible. The blasting operation should adopt advanced technical methods such as smooth blasting to facilitate the long-term stability of the roadway.