1. Reinforce the surrounding soft lane through anchoring and grouting
Maintaining a soft surrounding rock roadway has always been a difficult aspect in engineering construction. Due to the easy deformation, poor reliability, difficulty in maintenance, and high cost of soft surrounding rock, it has a significant impact on the operation of mines. Ordinary bolt supports cannot solve the protection problem of soft surrounding rock. Anchor reinforcement is the use of hollow bolts to inject mud into the surrounding rock, and then transport it to the surrounding rock to reinforce loose or cracked surrounding rock, increase the strength of the surrounding rock, and reduce the directional stress of the surrounding rock. A roadway that maintains a stable state of surrounding rock.
2. Joint support of anchor belt net and anchor cable in combined roof coal roadway
The support work of composite roofs is more complex. Due to the presence of weak foundations, the bonding force between rock layers is very low, and the anchoring capacity of general anchor measures is limited. If used, it is easy to cause roof collapse. Therefore, in order to solve this problem, it is necessary to use a combination of anchor belt net and anchor cable support technology.
3. Joint support of bolts, bolts, and cables in fully mechanized mining
The compressive strength of the surrounding rock roof along the two grooves of the fully mechanized caving face is very low, and once compressed, it is easy to fall off. For example, under the combined action of several ground stresses, the top coal is more likely to cause separation. This is the pressure on the top layer itself, geological structural stress, and mining concentration stress. Therefore, in order to prevent it from falling off, it is necessary to take bolt support measures and increase anchor cables to make the rock layer from the entire coal seam to the roof more stable.
4. Anchor rod support in fully mechanized mining face
The geometric volume and tonnage of the fully mechanized caving device are large, making it difficult to carry out the unloading process, occupying a large space, and maintaining high standards for unloading.