Analysis of the problems that should be paid attention to in the design of wave wall

　　Wave wall is a concrete or masonry structure of water retaining buildings, also known as flood control walls, is to ensure the town and important industrial and mining enterprises, along the river and coastal areas of flood control safety or other special requirements built. Wave wall has great advantages in solving the problem of seepage in coal mine roadway, mainly because of its economical and applicable characteristics. In the design and construction process of the wave wall, special attention should be paid to the selection of the form and location of the water retaining wall, as well as the problems of trough cleaning, water intercepting and diversion, water retaining wall pouring and embedded steel bars to ensure that the water retaining wall plays a role and effectively deals with the problem of water seepage in the roadway.

　　Problems in the design of wave wall: In the design process of wave wall, pay attention to the choice of the form and location of the wave wall. The type of wave wall can be divided into rectangle, conical wedge and spherical according to its structure, and conical wedge can be divided into multi-conical wedge and single conical wedge. Generally speaking, when dealing with the problem of coal mine roadway permeability, the conical wedge water retaining wall is widely used, while the rectangular and spherical water retaining wall are only used in special cases. Mainly because the conical wedge water retaining wall can be in close contact with the roadway surrounding rock, which increases the stability of the water retaining wall and has greater safety and reliability. The choice of single-cone wedge wall and multi-cone wedge wall needs to be determined according to the water pressure of the roadway. When the water pressure is below 2.5MPa, the single-cone wedge wall is generally used. When the water pressure exceeds, the inverted cone wall is generally used. For the above water retaining wall structure, in the design process, it is necessary to design by a professional team with design qualifications in combination with the actual situation of the project, and construction is carried out in strict accordance with the design drawings.

　　When choosing the location of the wave wall, the following principles must be adhered to, mainly including:1, in the design process of the wave wall, it is necessary to be familiar with and understand the various systems in the coal mine, and minimize the damage of the water wall to the original system in the mine.

　　2. When designing the location of the water retaining wall, the relevant situation that fault structure may cause water gushing in coal mine should also be comprehensively considered.

　　3, the location of the wave wall should also be selected according to the water conduction between the working face after coal mining.

　　4. The location of the wave wall should also be selected according to the specific situation of the water guide set of the rock mass around the water retaining wall.

　　5. In order to effectively solve the water seepage problem of coal mine roadway, ensure the safe and reasonable location of water retaining wall, and reduce the design and construction cost as much as possible, it is necessary to be familiar with the water permeability of coal mine roadway, explore the flow direction and path of coal mine groundwater, and conduct professional demonstration.