CN201835869U - Gob-side retained entry reinforcing fill structure - Google Patents

Abstract

A reinforced filling body structure along a gob-side entry, including a filling bag, the top edge of the filling bag is provided with several top small bags at intervals, and several side small bags are symmetrically arranged on both sides of the filling bag along the filling direction. There are a number of hooks at intervals between the top and the periphery of the filling bag for the pull anchor rod of the small bag, and a mold-protecting steel mesh fixed with iron wires around the filling bag. Before filling, put on the pull anchor rod from the small bag on the side, tie the small bag tightly with iron wire, install the tray, and tighten the nut; when filling, use the pressure of the slurry outlet of the filling pump to fully inflate the filling bag and connect it to the top. After the filling body reaches a certain strength, the anchoring force of the bolt is screwed to the preset value, and the filling and reinforcement of the filling body can be realized in one step. The structure is simple and the construction is convenient.

Description

A gob-side retaining reinforcement filling body structure

technical field

The utility model relates to the technical field of underground mechanized construction of roadside filling bodies, in particular to a gob-side retaining roadway reinforcement filling body structure suitable for deep high-stress mines. the

Background technique

Gobside retention is to use a roadway twice, which greatly improves the resource recovery rate and relieves the tension of mining replacement. It is a major reform of coal mining and mining roadway layout technology. After entering deep mining, the mine pressure intensifies, the roadway diameter shrinks significantly, large deformation of gob-side retaining filling body occurs, and bearing failure increases, especially the unroofed filling body damage is more serious. Therefore, the filling and roof connection effect and filling body support are the key points in gob-side entry retention. The usual method of mechanized filling in the past is: 1. First, secure the single pillar supporting the filling space on the periphery of the filling space, then set up the filling formwork, then put the suitable filling bag into the formwork, hang the filling bag, and make the filling bag The lower part is formed, and the pump is turned on for filling; 2. During the filling process, every time a certain height is filled, the filling bag is lifted up once to avoid falling and wrinkling of the filling bag. When filling, when the slurry in the filling bag gradually increases and approaches the upper end of the formwork, add a formwork or a wooden adjustment formwork, and repeat the above process until the filling bag is full and connected to the top; 3. After the filling body is solidified, remove the formwork, Then drill holes on the filling body, hang nets, and install pull anchors to reinforce the filling body. the

The shortcomings of using this method or the points that need to be improved are: 1. Due to the complex conditions of the roof of the underground working face, after the mining of the working face, the roof is uneven (or tilted or tilted), caving and net pockets are more common, and the open method is adopted. The top-connection effect is poor when filling the bag with the traditional type, and often only a small part of the filling body can be connected to the top, so it has to wait for the filling body to solidify and place a wooden pile on its top to connect the top. On the one hand, raw materials such as wood are wasted; on the other hand, it makes the Under the action of mine pressure, the roof of the roadway retaining slowly contacts the filling body, so that the peak value of the bearing pressure on the side of the coal side is transferred to the deep part of the coal seam, which cannot give full play to the early strength characteristics of the filling material, and may easily cause the failure of the roadway retaining along the gob; 2. Filling and reinforcement filling The body is implemented in two steps, and the process is cumbersome. Can the anchor rod be implanted in advance according to the requirements of the reinforced filling body during filling, and the anchor bolt should be tightened to the preset value after the filling body reaches a certain strength, which reduces the need for erection, Processes such as dismantling the formwork, hanging the net, drilling and installing anchor rods, etc., realize filling and strengthening the filling body in one step. the

Contents of the invention

The purpose of the utility model is to overcome the deficiencies in the prior art, and provide a gob-side retaining reinforcement filling body structure that is simple in structure and reduces the steps of erection, demolition of templates, hanging nets, drilling and installation of bolts and other processes. the

The reinforced filling body structure of the gob-side retention alley of the utility model includes a filling bag, the top edge of the filling bag is provided with several top small bags at intervals, and the filling bag is provided with several side small bags at intervals symmetrically on both sides of the filling direction, and There are pull anchor rods passing through the small side bags, several hooks are arranged at intervals between the top and the periphery of the filling bag, and a mold-protecting steel mesh fixed with iron wires is arranged around the filling bag. the

Beneficial effects: the utility model makes the filling bag into a closed cuboid shape, and several small bags are sewn on the top edge of the filling bag and at the same position on both sides along the filling direction (according to the requirements of the reinforced filling body), and the small bags on the top are used for filling and feeding. For the purpose of exhausting, the side small bag is put on the pull anchor rod to reinforce the filling body; then sew a certain density of hooks on the central area of the top of the filling bag and the surrounding side lines at a distance from the top of the filling bag, and hang the hook On the roof or surroundings of the filling space, the steel mesh is used as the filling template to shape the filling body and to strengthen the side of the filling body by pulling anchor rods. The process of filling and reinforcing the filling body in the gob-side entry is changed in two steps. Its structure is simple and easy to operate, which is beneficial to underground construction and enables mechanized pumping to quickly construct the gob-side entry entry filling body structure densely connected to the roof while reinforcing Filling body, to achieve dense roofing and reinforcement of the filling body support. Compared with the existing technology, firstly, it can make the filling material densely connected to the roof, realize the early bearing characteristics of the filling material, prevent layer separation, cut off the goaf and directly top; Reduce the process of erection, dismantling formwork, hanging net and drilling and installing anchor rods; 3. It does not destroy the integrity of the filling body, reduces the width of the temporary roof protection at the gob side, and is more conducive to retaining roadways along the goaf; 4. Simple operation , high reliability, low filling cost, and wide applicability in this technical field. the

Description of drawings

Fig. 1 is a structural representation of the utility model. the

Fig. 2 is a schematic diagram of the I-I section structure in Fig. 1 . the

FIG. 3 is a partially enlarged view of FIG. 2 . the

In the picture: 1-Filling bag, 2-Reinforcing formwork reinforcement mesh, 3-Iron wire, 4-Hook, 5-Double anchor rod, 6-Top small bag, 7-Nut, 8-Tray, 9-Side small bag . the

Detailed ways

An embodiment of the present utility model is further described below in conjunction with accompanying drawing:

As shown in the accompanying drawings, the gob-side entry reinforcement filling body structure of the present invention includes a closed cuboid filling bag 1, and the top edge of the filling bag 1 is provided with several holes for filling and exhausting. The top small bag 6 and the filling bag 1 are symmetrically arranged on both sides of the filling direction with several side small bags 9 that pass through the pull anchor rod 5. The pull anchor rod 5 passes through the side small bag 9, and its two ends are respectively equipped with The tray 8 and the nut 7 are provided with several hooks 4 at intervals between the top and the periphery of the filling bag 1 , and a mold-protecting steel mesh 2 fixed with iron wire 3 is provided around the filling bag 1 . Before filling, put on the pull anchor rod from the side small bag, tie the side small bag 9 with iron wire 3, install the tray 8, and tighten the nut 7; when filling, use the pressure of the slurry outlet of the filling pump to fill the bag The bulging fully touches the coal or rock formation on the roof of the working face; after the filling body reaches a certain strength, the anchoring force of the pull bolt is screwed to the preset value, and the filling and reinforcement of the filling body are realized in one step. the

Claims (1)

1. A gob-side retaining reinforcement filling body structure, comprising a filling bag (1), characterized in that: the top edge of the filling bag (1) is provided with several top small bags (6) at intervals, and the filling bag (1) ) along the filling direction, there are several small side bags (9) symmetrically arranged at intervals, and a pull anchor rod (5) passing through the side small bags (9), and the top and periphery of the filling bag (1) are provided with A plurality of hooks (4), the surrounding of the filling bag (1) are provided with a mold-protecting steel mesh (2) fixed with iron wires (3).

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