CN106089295B - A kind of filling template of coal mine underground exploitation - Google Patents

Abstract

The invention discloses a filling template for underground mining of coal mines, which comprises a fixed restraint frame, four telescopic support rods, a flexible cloth, an anchor rod, and a flexible steel wire rope; the fixed restraint frame is a rectangular frame, and the telescopic support rod is connected below; The telescopic support rod is composed of a lower rod, a middle rod and an upper rod, with reinforcing ribs inside; the flexible cloth is composed of two layers of waterproof layers inside and outside and a nylon cloth in the center, and the flexible cloth is bonded to the fixed restraint frame. Vent holes and filling holes are arranged on one side of the flexible cloth; an anchor rod is respectively arranged above any two opposite sides of the fixed restraint frame; the flexible steel wire ropes are respectively located in spaces surrounded by telescopic support rods. The entire frame of the filling formwork can be folded into a plate shape, which is small in size and light in weight, and is convenient for transportation; it is quick to install underground, convenient for workers to operate, and does not need to remove the formwork, which reduces labor intensity, improves work efficiency, and reduces the number of workers in the goaf. time, improving safety.

Description

A filling template for underground mining of coal mines

technical field

The invention relates to a filling formwork for underground mining of coal mines, belonging to the technical field of filling mining.

Background technique

The traditional mining technologies of my country's coal mines include layer-separated grouting, strip mining, room mining, and filling mining. Among them, layer-separated grouting has high cost, low efficiency and cannot effectively control surface subsidence; strip and room mining, The resource recovery rate is low and the resource waste is serious. Filling mining can not only effectively control the surface subsidence, but also the resource recovery rate can reach more than 90%.

Filling mining is a technology in which filling materials such as gangue, sand, and paste are sent to the goaf along with the advancement of the coal mining face, and coal mining is carried out under the protection of the filling body. On the one hand, filling mining ensures the safe production of coal mines, on the other hand, it improves the utilization of coal resources and protects the ecological environment. Traditional caving mining is likely to cause problems such as large-scale caving of goafs, gas gushing out, spontaneous combustion of goafs, and coal mine accidents.

Through the implementation of filling mining, it can reduce the gas accumulation space in the mine, reduce the occurrence of accidents such as gas and dangerous gas outburst explosions; it can also effectively reduce the sinking of the coal seam roof, suppress the dynamic phenomenon of the coal seam and the roof and floor, and reduce the advance of the mining face. Bearing pressure; it can digest a large amount of ground gangue and urban construction waste, save land, effectively reduce stratum changes and subsidence, protect water resources, maintain ecological environment, improve resource recovery rate, and extend mine service life. Therefore, filling mining plays an important role in improving mine safety and promoting safe production in coal mines.

However, most coal mines in my country currently use filling technology, and full filling faces the problems of high cost of filling materials and difficulty in technology promotion, which are key factors restricting filling mining. For this reason, various low-cost materials such as waste concrete, loess, and garbage have been studied, but it is still difficult to meet the needs of filling mining. Compared with full filling, partial filling has the advantages of less filling material and low cost, but the filling process is relatively complicated, and the filling material used has certain rheological properties, so it is rarely used. The partial filling process requires the assistance of filling templates, which is the key to restricting the development of partial filling technology. The currently used filling formwork is generally rigid formwork and adopts the on-site formwork dismantling process, which has several shortcomings: (1) the formwork is bulky and heavy, and is not easy to transport; It takes a long time to mold, and the risk increases; (3) The filling material has rheology, and the long-term strength decreases; (4) The top connection rate is low, and the early support effect is small, which reduces the filling effect; (5) Formwork support, filling, dismantling The mold process is complicated and the cost is high.

Contents of the invention

Aiming at the above-mentioned problems encountered in partial filling, the present invention proposes a filling template for underground mining of coal mines, which can conveniently, safely, economically and effectively realize partial filling of goafs in coal mine working faces.

The invention provides a filling formwork for underground coal mine mining, which includes a fixed restraint frame, four telescopic support rods, a flexible cloth, two anchor rods, and a flexible steel wire rope;

The fixed restraint frame is a rectangular frame, and short rods are respectively arranged under its four corners, which are convenient for connecting telescopic support rods;

The inside of the telescopic support rod is provided with reinforcing ribs, which are composed of three rods: a lower rod, a middle rod and an upper rod. The upper rod slides in the middle rod, and the middle rod slides in the lower rod. The upper rod is connected to a fixed restraint frame The short bar, the middle bar and the lower bar are provided with set screws, and the set screws can slide along the edge chute of the middle bar and the lower bar. When the support bar is extended, it is used to fasten the support bar to prevent the upper bar and the The middle rod slides freely to the lower rod;

The flexible cloth is composed of inner and outer waterproof layers and a nylon cloth in the center, and a flexible steel wire mesh is woven into the nylon cloth to enhance the overall strength of the flexible cloth; the flexible cloth is bonded to a fixed restraint frame, There are two holes on one side of the flexible cloth, which are the vent hole and the filling hole, and the vent hole is located above the filling hole;

The lower end of the anchor rod is connected with the fixed restraint frame through a hanging ring, and the upper end is fixed on the upper roof, so that the entire filling frame is fixed with the upper roof, and the connection is closer, and at the same time it plays the role of support; any two sides of the fixed restraint frame An anchor rod is respectively arranged on the top of the opposite side;

The flexible steel wire ropes are respectively located in the space surrounded by the telescopic support rods, a flexible steel wire rope is provided at the connection between the upper rod and the middle rod, and a flexible steel wire rope is provided at the connection between the middle rod and the lower rod, and the flexible steel wire rope is surrounded by the support rod. Around; the flexible steel wire rope is used to support and fix the support rod to enhance its stability.

In the above solution, the short rod is connected to the fixed restraint frame by screws; the short rod is hinged to the upper rod of the telescopic support rod; the fixed restraint frame is hinged to the hanging ring for connecting the anchor rod.

In the above solution, the waterproof layer is consistent with the waterproof coiled material of the house building materials, is made of polymer polyvinyl chloride material, has certain flexibility and relatively large elongation, and is arranged on the inner and outer sides of the nylon cloth respectively.

In the above solution, the middle rod and the lower rod of the telescopic support rod have corresponding chute, the chute is correspondingly interlocked, the outermost layer is the lower rod after contraction, and the inner part is the middle rod and the upper rod in turn. The outermost lower rod of the telescopic support rod can limit its elongation by tightening a set screw.

In the above solution, the telescopic support rod can be folded toward the center of the fixed constraint frame.

Beneficial effects of the present invention:

The invention provides a filling formwork for underground mining of coal mines, which is composed of a fixed restraint frame, telescopic support rods and flexible cloth. , which is convenient for workers to operate without removing the formwork, which reduces labor intensity, improves work efficiency, reduces the time of workers in the goaf, and improves safety; the frame is fixed to the upper roof by anchor rods, and the roof connection rate is high. The filling effect is good, and at the same time, it has a certain supporting effect; there are flexible steel wire ropes around the supporting rods, so that there is a restraint effect between the supporting rods, enhancing its stability, and the cost is lower than that of on-site formwork.

Description of drawings

Figure 1: Stereoscopic structural view of the filling frame with the flexible cloth removed;

Figure 2: Folding diagram of the filling frame with the flexible cloth removed;

Figure 3: Folded diagram of the filling frame with flexible cloth;

Figure 4: Schematic diagram of the cross section of the flexible cloth;

Figure 5: The internal structure diagram of the telescopic support rod;

Figure 6: Schematic diagram of the use state of the present invention.

In the figure: 1. Fixed restraint frame, 2. Support rod, 3. Screw, 4. Flexible cloth, 5. Hanging ring, 6. Anchor rod, 7. Short rod, 8. Vent hole, 9. Filling hole, 10 , upper rod, 11, middle rod, 12, lower rod, 13, reinforcing rib, 14, set screw, 15, nylon cloth, 16, waterproof layer, 17, flexible wire rope.

Detailed ways

The present invention is further illustrated by the following examples, but not limited to the following examples.

Example:

As shown in Figures 1 to 6, a filling template for underground mining of coal mines includes a fixed restraint frame 1, four telescopic support rods 2, a flexible cloth 4, two anchor rods 6, and a flexible steel wire rope 17;

The fixed restraint frame 1 is a rectangular frame, and short rods 7 are respectively arranged under its four corners, which are convenient for connecting telescopic support rods 2;

The inside of the telescopic support rod 2 is provided with a reinforcing rib 13, which is composed of three rods, the lower rod 12, the middle rod 11 and the upper rod 10. The upper rod 10 slides in the middle rod 11, and the middle rod 11 slides in the lower rod 12. , the upper bar 10 is connected to the short bar 7 of the fixed restraint frame, the middle bar 11 and the lower bar 12 are provided with set screws 14, and the set screws 14 can slide along the edge chute of the middle bar 11 and the lower bar 12, when When the support rod 2 is extended, it is used to fasten the support rod 2 to prevent the upper rod 10 and the middle rod 11 from sliding freely to the lower rod 12;

Described flexible cloth 4 is made up of inner and outer two-layer waterproof layer 16 and the nylon cloth 15 of its center, in described nylon cloth 15, weaves flexible steel mesh, to strengthen the overall strength of flexible cloth 4; Described flexible cloth 4 and fixed constraint The frame 4 is bonded together, and two holes are provided on one side of the flexible cloth 4, which are respectively a vent hole 8 and a filling hole 9, and the vent hole 8 is located above the filling hole 9;

The lower end of the anchor rod 6 is connected to the fixed restraint frame 1 through the hanging ring 5, and the upper end is fixed on the upper roof, so that the entire filling frame and the upper roof are fixed, the connection is closer, and the role of support is played at the same time; in the fixed restraint frame An anchor rod is respectively provided above any two opposite sides of ;

The flexible steel wire ropes 17 are respectively located in the space surrounded by the telescopic support rods 2, a flexible steel wire rope 17 is provided at the junction of the upper rod 10 and the middle rod 11, and a flexible steel wire rope is arranged at the junction of the middle rod 11 and the lower rod 12. 17. The flexible steel wire rope 17 surrounds the support rod; the flexible steel wire rope 17 is used to support and fix the support rod 2 to enhance its stability.

In the above solution, the short rod 7 is connected to the fixed restraint frame 1 by screws 3; the short rod 7 is hinged to the upper rod of the telescopic support rod 2; the fixed restraint frame 1 is hinged to the hanging ring 5 for connecting the anchor rod 6.

In the above solution, the waterproof layer 16 is consistent with the waterproof coiled material of the house building material, made of high molecular polyvinyl chloride material, has certain flexibility and relatively large elongation, and is respectively arranged on the inner and outer sides of the nylon cloth 15 .

In the above scheme, the middle rod 11 and the lower rod 12 of the telescopic support rod 2 have corresponding chutes inside, and the chutes are correspondingly interlocked. After shrinking, the outermost layer is the lower rod 12, and the inside is the middle rod 11 and the upper The rod 10 is opposite to the radio receiving antenna. When the radio receiving antenna is used, the innermost rod is directly pulled to elongate, and the telescopic support rod 2 pulls the outermost lower rod 12, and finally tightens the set screw 14 to limit its elongation. .

In the above solution, the telescopic support rod 2 can be folded toward the center of the fixed constraining frame 1 .

Taking the working face of Baijiazhuang coal mine of Xishan Coal and Electricity Group as an example to further illustrate the application of the filling formwork of the present invention, the specific operation steps of using the above-mentioned filling formwork to carry out underground coal mine mining and filling are as follows:

Step 1: After the filling template is transported to the goaf of the working face, the upper rod 10 and the middle rod 11 of the four telescopic support rods 2 are extended, fastened and fixed by the set screw 14, and the legs of the support rod are connected to the goaf. butt against the ground;

Step 2: Fix the other end of the anchor rod 6 to the upper roof, so that the entire filling formwork is connected and fixed with the upper roof plate, and the filling formwork is installed as shown in Figure 1;

Step 3: As shown in Figure 6, fill the grouting pipe against the filling hole 9, and at the same time, the gas in the filling template is discharged from the exhaust hole 8. Since the filling material has certain rheological characteristics, the flexible steel wire rope 17 Surrounding the telescopic support rod, it is used to support and fix the support rod to enhance its stability.

Claims (5)

1. A kind of 1. filling template of coal mine underground exploitation, it is characterised in that：Including fixed constraint framework, four telescoping supports Bar, flexible cloth, two anchor poles, flexible wire ropes；

   The fixed constraint framework is rectangular frame, and its four angles are respectively arranged below with quarter butt, is easy to connect Telescopic supporting rod；

   The inside of the Telescopic supporting rod is provided with reinforcement, is made up of three lower pole, middle part bar and upper bar bars, upper bar Slided in the bar of middle part, middle part bar slides in lower pole, the upper bar be connected constraint framework quarter butt, middle part bar and Lower pole is provided with holding screw, and the holding screw can work as Telescopic supporting rod along middle part bar and lower pole edge slide During elongation, for fastening Telescopic supporting rod, prevent upper bar and middle part bar successively to lower pole slidably；

   The flexible cloth is made up of the nylon cloth of inside and outside two layers of waterproof layer and its center, and flexible steel wire is woven into the nylon cloth Net；The flexible cloth bonds together with fixed constraint framework, provided with two circular cavities is respectively steam vent in the one side of flexible cloth And pack hole, steam vent are located at the top of pack hole；

   The anchor pole lower end is connected by link with fixed constraint framework, and upper end is fixed on the top plate of top；In fixed constraint frame An anchor pole is respectively provided with respectively above any two opposite side of frame；

   The flexible wire ropes are located in the space that Telescopic supporting rod surrounds, and one is provided with upper bar and middle part bar junction Flexible wire ropes, at middle part, bar and lower pole junction are provided with a flexible wire ropes, flexible wire ropes connection telescoping support Bar, flexible wire ropes are used for supporting and fix Telescopic supporting rod, strengthen its stability.
2. 2. the filling template of coal mine underground exploitation according to claim 1, it is characterised in that：The quarter butt and fixed constraint Framework is connected by screw；The upper bar of quarter butt and Telescopic supporting rod is hinged；Fixed constraint framework is hinged with link, for even Connect anchor pole.
3. 3. the filling template of coal mine underground exploitation according to claim 1, it is characterised in that：The waterproof layer is by macromolecule Pvc material is made, and is separately positioned on inside and outside nylon cloth.
4. 4. the filling template of coal mine underground exploitation according to claim 1, it is characterised in that：Telescopic supporting rod can be to admittedly Conclude a contract or treaty the folding of beam frame center.
5. 5. the filling template of coal mine underground exploitation according to claim 1, it is characterised in that：The Telescopic supporting rod There are respective slide slots in middle part bar and lower pole, chute correspondingly interlocks, and outermost layer is lower pole after contraction, and inside is middle part bar successively And upper bar.