CN106050303A - Underground roadway plugging method and device - Google Patents

Abstract

A method and device for blocking underground tunnels. The utility model has the advantages of simple structure, convenient and safe operation, and can reduce the labor load of workers and improve the efficiency of workers. It is characterized in that: steel rods, planks, and steel mesh are used to build the frame of the sealing wall, and then the filling bag is arranged in the frame, and a pump station is arranged within a certain distance from the frame to stir the high-water material, and after the filling bag is supported, it passes through the pipe The filling material is injected into the filling bag, and the roadway can be blocked when the filling material is solidified. The device and method are simple and effective, and are beneficial to the high-efficiency production of mines.

Description

A method and device for underground roadway sealing

Technical field:

The invention relates to a method for blocking an underground roadway, which adopts a simple device for water blocking, fire prevention and gas blocking.

Background technique:

At present, during the excavation and use of coal mine roadways, due to production needs, some roadways need to be abandoned. In order to avoid secondary hazards brought by the roadway, such as water gushing, gas outburst, and coal seam spontaneous combustion, etc., the roadway needs to be treated. The simplest method is to block the roadway, intercept a section and use materials to block the entire section, and isolate the connection between the roadway and the mine production system. At present, the sealing of underground roadways is mainly cement grouting. There are mainly two types of sealing frames. One is to build a wall before and after the roadway sealing position, and then inject grout into the closed space. It is to replace the wall with wooden boards, build a mold with wooden boards, form a closed space and then inject grout. Cement grouting can seal the roadway, but the construction process is complicated and the operation is difficult, especially in the process of grouting, pipe plugging may occur, which increases the cost and labor.

Invention content:

In order to overcome the disadvantages that the existing technology is not convenient for workers to construct and the cost is high, the present invention provides a new method, which can not only simplify the process of sealing the roadway, but also reduce the production cost of the mine.

The technical solution adopted in the present invention is: install a pumping station at a reasonable position from the roadway to be blocked to facilitate material transportation and equipment placement, and stir high-water materials (a fast-condensing high-condensation water material, The water-cement ratio is 2:1, and the compressive strength is up to 9MPa). At the same time, the filling mold is built with anchor rods, wooden boards, and filling bags at the sealing position. After the filling material is fully stirred, it is injected into the filling mold through the pipeline, and the sealing wall is formed. up.

The advantages and positive effects of the invention are: simple equipment, low labor intensity, safety, economy and effectiveness.

Description of drawings:

Figure 1 is a map of the location of the roadway blockage.

Figure 2 is a sectional view of the plugging frame.

Figure 3 is a diagram of the filling pump station.

Figure 4 is a sectional view of filling pump station I-1

Fig. 5 is the accompanying drawing of filling bag.

Among them: 1-roadway, 2-steel rod, 3-wooden board, 4-steel mesh, 5-filling bag, 6-filling pipeline, 7-slurry suction pipeline, 8-filling pump, 9-hydraulic tank, 10- Material A mixing tank, 11-material B mixing tank, 12-stirring tank, 13-drainage tank, 14-hanging ring, 15-grouting port.

detailed description:

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

In Fig. 1 and Fig. 2, a blockage frame is built at the roadway blockage position to replace the closed wall, and the front and rear retaining walls of the filling bag are formed outside the blockage frame, which is composed of steel rods (2), planks (3), steel mesh (4 ) to form, then the filling bag (5) is hung in the closed space, and there are parts available for fixing on the top and around the filling bag (5). The construction process of the blockage frame is: use a pneumatic drill or other tools to drill 1-2m deep drills every 1m at the position of the retaining wall before and after the blockage, and then insert the rigid rod (2) into the drill hole. Connect the steel rods (2) at different positions according to the required height. After the connection is completed, tie the planks (3) to the steel rods (2) that have been set up, and tie one piece at intervals of 800mm upwards. The length depends on the width of the roadway. Then steel mesh (4) is hung on the plank (3). Among them, the plank (3) is made of thin wood with a width of about 25 mm and a moderate length, which is convenient for binding; the steel mesh (4) is made of thin steel bars, commonly known as "reinforced dams", and steel bars are welded with steel bars by 10×20 holes The length and width of the "reinforced dam" depends on the needs of the roadway. The purpose is to block the gap between the wooden board (4) and the steel rod (2), so that the filling bag will not bulge, and prevent the filling body from absorbing heat during the filling process. Large, resulting in swollen cracks. After the retaining wall is built, send the filling bag in, bind the corners of the filling bag to the predetermined position, hang the filling bag conditionally, and blow air into the filling bag to make the filling bag bulge to the required position. Fill every corner and improve the utilization effect of the filling bag. The construction of the sealing frame is completed, and the next step is to inject grout into the filling bag.

In Fig. 3, during the support of the plugging frame, the filling pump station in Fig. 4 starts to mix materials, and materials A and B are loaded with mining wagons respectively, and the wagons are parked on the track, and the filling pump (8) in the figure is placed In the middle, first and second materials are respectively placed in the first material mixing tank (10) and the second material mixing tank (11) to stir. After 3-5 minutes, the filling bag on the working surface is supported and the oil pressure tank (9) is opened. Due to the pressure, the slurry A and B are sucked through the slurry suction pipe (7) respectively, and are transported to the filling pipeline (6) under high pressure. On the working surface, connect a mixer between the filling bag pipeline and the A and B filling pipelines, so that the two slurries are fully mixed and then injected into the filling bag. After the filling work is completed, clean the pump and pipeline with clean water, make full use of the slurry in the pipeline, prevent the slurry from blocking the pipe, inject the cleaned water into the working face, and drain the remaining water into the ditch through the drainage tank (13). After mixing The slurry solidifies in about half an hour, reaches a certain compressive strength in one day, and reaches the maximum compressive strength in seven days.

Claims (3)

1. A method and device for sealing an underground roadway. When blocking an abandoned roadway, a filling material is used to propose a new method from the perspective of adapting to the characteristics of pipeline transportation. It is characterized in that: steel rods, planks, and steel bars are used Build the frame of the sealing wall with a net, then arrange the filling bag in the frame, arrange a pump station within a certain distance from the frame to stir the high-water material, and inject the filling material into the filling bag through the pipeline after the filling bag is supported. The roadway can be blocked by solidification. 2. The underground roadway sealing method and device according to claim 1, characterized in that: the filling material is high-water material, which is convenient for transportation, and the filling pump station can be placed at a suitable position in the roadway. 3. The underground roadway sealing method and device according to claim 1, characterized in that: the sealing frame of the filling bag is composed of simple steel rods, planks, steel mesh, etc., which is simple, convenient, stable and firm.