Water retaining wall structure for treating well flooding caused by caving and water inrush of working face

Abstract

The utility model discloses a retention wall structure for treating caving and water inrush flooding of a working face, and belongs to the technical field of water inrush treatment. The roadway structure comprises a roadway, a flooded working face is arranged in the roadway, and the roadway is divided into two areas by the flooded working face, namely a conventional roadway and a flooded roadway; a treatment tunnel face is arranged in the conventional roadway; a retention wall construction grouting hole is formed in the center of the treatment tunnel face; a plurality of water-retaining wall roof-contacted grouting holes are formed in a top plate of the treatment tunnel face at intervals; and the retention wall construction grouting holes and the retention wall roof-contacted grouting holes horizontally penetrate through the conventional roadway and extend to the flooded working face from the treatment tunnel face. A plurality of drill holes are constructed in the center of the governed tunnel face and the top plate to penetrate through the roadway, and the cement-water glass double-liquid slurry is poured to construct the retention wall, so that the construction process is safe and reliable, the cost is low, the process is simple, and the structure has important significance on safe construction of underground mines.

Description

TECHNICAL FIELD

[0001] The utility model relates to a water bursting treatment technical field more specifically, relate to a kind of water retaining wall structure of governance working face caving water bursting flooded well. BACKGROUND

[0002] In underground mining operation, working face caving water bursting is a common disaster, once water bursting volume exceeds mine drainage capacity, it can lead to mine flooding, seriously threaten the life safety of miner and mine production safety. The existing water bursting flooded well treatment method generally adopts large pump volume water pumping and surface directional drilling grouting plugging treatment method.

[0003] Water pumping method is generally through forced drainage, then water retaining wall is constructed in working face to close water bursting point, and then grouting is carried out to plug caving water bursting point. It requires that water pumping pump capacity is much larger than water bursting volume, and water bursting volume is stable, while working face caving water bursting is often due to roof surrounding rock weak and broken, gradually unstable caving under the action of water permeability of outer aquifer, greatly intensifies hydraulic permeation scour in water pumping and drainage process, thereby increasing caving range and water bursting volume, there is the risk of secondary flooding, and there is great safety hazard in underground operation.

[0004] Surface directional drilling grouting method is through directional drilling to water bursting point position, and then grouting is carried out to plug, as water bursting point is connected with shaft, a large amount of slurry leaks in shaft, and treatment cost and later shaft cleaning difficulty are great.

[0005] Therefore, it is of great significance to seek a safe and reliable, low-cost, simple process water bursting treatment method for underground mine safety construction. UTILITY MODEL CONTENT

[0006] 1. Technical problem to be solved by the utility model

[0007] In view of defects and deficiencies existing in prior art, the utility model provides a kind of water retaining wall structure of governance working face caving water bursting flooded well, and the utility model constructs a water retaining wall by grouting cement water glass double-liquid slurry through multiple drillings penetrating roadway at the center of opposite side governance working face and roof at a certain safe distance from caving submerged working face, and it is safe and reliable, low-cost, simple process in construction process, and it is of great significance to underground mine safety construction.

[0008] 2. Technical scheme

[0009] To achieve the above purpose, the technical scheme provided by the utility model is:

[0010] The utility model relates to a kind of water retaining wall structure of governance working face caving water bursting flooded well, including roadway, the roadway is provided with flooded working face, and the flooded working face divides roadway into two areas, and they are conventional roadway and flooded roadway respectively.

[0011] The falling body is filled with a falling zone grouting stone body above the water retaining wall.

[0012] The regular roadway is provided with a governance face; the center of the governance face is provided with a water retaining wall construction grouting hole; the roof of the governance face is provided with a plurality of water retaining wall roof joint grouting holes.

[0013] The water retaining wall construction grouting hole and the water retaining wall roof joint grouting hole horizontally pass through the regular roadway and extend from the governance face to the flooded working face.

[0014] The roof of the governance face is further provided with a plurality of water inrush point grouting holes.

[0015] Further, the rock column adjacent to the side of the governance face close to the flooded working face is a grouting rock cap, and the thickness of the grouting rock cap is 4-8 m.

[0016] Further, the orifice pipes of the water retaining wall construction grouting hole, the water retaining wall roof joint grouting hole and the water inrush point grouting hole are all embedded and reinforced on the grouting rock cap.

[0017] Further, the flooded working face is spaced apart from the governance face by a safety distance, and the safety distance is determined by the following formula:

[0018]

[0019] In the formula, M is the height of the roadway, and the unit is m;

[0020] K is a safety factor;

[0021] P is the static water pressure borne by the flooded face, and the unit is mPa;

[0022] K P is the shear strength of the surrounding rock of the roadway, and the unit is mPa.

[0023] Further, the water inrush point grouting hole extends from the governance face to the flooded working face and is upwardly inclined at an angle of 5-10 degrees.

[0024] Further, a water retaining wall is constructed at the flooded working face by pouring cement and water glass double-liquid slurry into the water retaining wall construction grouting hole, and the roof of the water retaining wall is reinforced and grouted through the water retaining wall roof joint grouting hole.

[0025] 3. Beneficial effects

[0026] Compared with the prior art, the technical scheme has the following beneficial effects:

[0027] The utility model discloses a kind of water retaining wall structures for managing working face caving and water inrush, which comprises a roadway 6, a flooded working face 601 is arranged in the roadway 6, the flooded working face 601 divides the roadway 6 into two areas, which are a conventional roadway 602 and a flooded roadway 603 respectively. BRIEF DESCRIPTION OF DRAWINGS

[0028] Fig. 1 It is the overall structure diagram of the utility model;

[0029] Fig. 2 It is the opening effect diagram of the utility model for managing working face;

[0030] In the figure: 1, managing working face; 2, stop grouting rock cap; 3, water inrush point grouting hole; 4, water retaining wall top connecting grouting hole; 5, water retaining wall construction grouting hole; 6, roadway; 601, flooded working face; 602, conventional roadway; 603, flooded roadway; 7, caving zone grouting stone body; 8, caving collapse body; 9, water retaining wall. DETAILED DESCRIPTION

[0031] The utility model will be further described below in combination with the drawings and examples:

[0032] Example 1

[0033] From Figs. 1-2 It can be seen that the water retaining wall structure for managing working face caving and water inrush in this example comprises a roadway 6, a flooded working face 601 is arranged in the roadway 6, the flooded working face 601 divides the roadway 6 into two areas, which are a conventional roadway 602 and a flooded roadway 603 respectively;

[0034] A caving collapse body 8 is arranged in the flooded roadway 603, a water retaining wall 9 is constructed on the caving collapse body 8, and a caving zone grouting stone body 7 is filled above the water retaining wall 9;

[0035] A managing working face 1 is arranged in the conventional roadway 602; a water retaining wall construction grouting hole 5 is arranged at the center of the managing working face 1; and a plurality of water retaining wall top connecting grouting holes 4 are arranged at intervals on the roof of the managing working face 1;

[0036] The water retaining wall construction grouting hole 5 and the water retaining wall top connecting grouting hole 4 respectively horizontally penetrate the conventional roadway 602 and extend from the managing working face 1 to the flooded working face 601;

[0037] A plurality of water inrush point grouting holes 3 are also arranged at intervals on the roof of the managing working face 1.

[0038] The rock column on the side of the managing working face 1 close to the flooded working face 601 is a stop grouting rock cap 2, and the thickness of the stop grouting rock cap 2 is 4-8 m.

[0039] The orifice pipes of the water retaining wall construction grouting hole 5, the water retaining wall roof connecting grouting hole 4 and the water inrush point grouting hole 3 are all embedded and reinforced on the grouting rock cap 2.

[0040] The flooded working face 601 is spaced apart from the management face 1 by a safety distance, and the safety distance is determined by the following formula:

[0041]

[0042] In the above formula, M is the height of the roadway, and the unit is m;

[0043] K is the safety factor;

[0044] P is the static water pressure borne by the flooded face, and the unit is mPa;

[0045] K P is the shear strength of the surrounding rock of the roadway, and the unit is mPa.

[0046] The water inrush point grouting hole 3 extends from the management face 1 to the flooded working face 601 and is inclined upward by 5-10 degrees.

[0047] A water retaining wall 9 is constructed at the flooded working face 601 by pouring cement and water glass double liquid slurry into the water retaining wall construction grouting hole 5, and the roof of the water retaining wall 9 is reinforced by roof connecting grouting through the water retaining wall roof connecting grouting hole 4.

[0048] Example 2

[0049] From Figs. 1-2 It can be seen that the construction method of the water retaining wall structure for managing the water inrush and flooded well of the working face collapse in the embodiment includes the following steps:

[0050] Step one: constructing a water retaining wall 9;

[0051] In a bidirectional excavation construction roadway 6, a plurality of drill holes are constructed through the roadway 6 at the center and the roof of the management face 1 on the opposite side of the collapsed and flooded face at a certain safety distance, and a water retaining wall 9 is constructed by pouring cement and water glass double liquid slurry;

[0052] The cement and water glass double liquid slurry water retaining wall grouting construction steps are:

[0053] a) First, a horizontal through water retaining wall construction grouting hole 5 is constructed at the center of the management face 1, and cement and water glass double liquid slurry is poured until the grouting pressure rises to twice the static water pressure;

[0054] b) The water retaining wall construction grouting hole 5 is swept, the water retaining wall 9 is swept through, the thickness of the water retaining wall 9 is determined, if the thickness of the water retaining wall 9 is less than 10 m, the cement and water glass double liquid slurry is continuously poured according to step a; if the thickness of the water retaining wall 9 is greater than or equal to 10 m, the hole is grouted and sealed;

[0055] c) in the governance of the working face roof construction three horizontal through the water retaining wall roof grouting hole 4, pouring cement water glass double liquid slurry, the water retaining wall 9 roof is topped with reinforcement grouting.

[0056] Step two: in the governance of the working face roof roadway two water inrush point grouting hole 3, drill hole upper angle 5~10 °, pouring cement slurry to the falling zone filling grouting reinforcement;

[0057] Step three: sweep away the water retaining wall construction grouting hole 5 and verify the treatment effect.

[0058] The proportion of cement water glass double liquid slurry is that the water solid ratio of the used cement slurry is 1:1, the volume ratio of cement slurry and water glass solution is 1:1, and the water glass solution is 38-40°.

[0059] The utility model relates to the technical field of mine water prevention and control and roof water inrush treatment, and particularly relates to a water retaining wall for treating working face caving and water inrush and a method.

[0060] The utility model constructs a water retaining wall 9 by drilling multiple boreholes through the roadway 6 at the center of the opposite side of the working face 1 and the roof at a certain safe distance from the caving and submerged working face, which is safe and reliable in construction process, low in cost, simple in process, and important for underground mine safety construction.

[0061] The above description of the utility model and its implementation mode is illustrative, and is not restrictive, and the shown in the drawings is only one of the implementation modes of the utility model, and the actual structure is not limited to this. Therefore, if the ordinary skilled in the art is inspired, similar structure modes and examples are not created creatively without departing from the utility model creation purpose, which should belong to the protection scope of the utility model.

Claims

1. A water retaining wall structure for governing water inrush and flooding of a working face, comprising a roadway (6), characterized in that: The roadway (6) is provided with a flooded working face (601), which divides the roadway (6) into two areas, namely a conventional roadway (602) and a flooded roadway (603); The flooded roadway (603) is provided with a caving collapse body (8), and a water retaining wall (9) is constructed on the caving collapse body (8), and a caving zone grouting stone body (7) is filled above the water retaining wall (9); The conventional roadway (602) is provided with a treatment face (1); a water retaining wall construction grouting hole (5) is formed at the center of the treatment face (1); and a plurality of water retaining wall roof connecting grouting holes (4) are formed at the roof of the treatment face (1) at intervals; The water retaining wall construction grouting hole (5) and the water retaining wall roof connecting grouting hole (4) respectively horizontally penetrate the conventional roadway (602) and extend from the treatment face (1) to the flooded working face (601); A plurality of water inrush point grouting holes (3) are also formed at the roof of the treatment face (1) at intervals.

2. The water retaining wall structure for governing water inrush and flooding in a working face according to claim 1, characterized in that: The rock column adjacent to the flooded working face (601) on one side of the treatment face (1) is a grouting stopping rock cap (2), and the thickness of the grouting stopping rock cap (2) is 4-8 m.

3. The water retaining wall structure for governing water inrush and flooding in a working face according to claim 2, characterized in that: The orifice pipes of the water retaining wall construction grouting hole (5), the water retaining wall roof connecting grouting hole (4) and the water inrush point grouting hole (3) are all embedded and reinforced on the grouting stopping rock cap (2).

4. The water retaining wall structure for governing water inrush and flooding in a working face according to claim 1, characterized in that: The flooded working face (601) and the treatment face (1) are spaced apart by a safety distance, and the safety distance is determined by the following formula: In the formula, M is the height of the roadway, and the unit is m; K is the safety factor; P is the static water pressure borne by the flooded face, and the unit is mPa; K P is the shear strength of the roadway surrounding rock, with units of mPa.

5. The water retaining wall structure for governing water inrush and flooding in a working face according to claim 1, characterized in that: The water inrush point grouting hole (3) extends from the treatment face (1) to the flooded working face (601) and is inclined upward by 5-10 degrees.

6. The water retaining wall structure for governing water inrush and flooding in a working face according to claim 1, characterized in that: A water retaining wall (9) is constructed on the flooded working face (601) by pouring cement and water glass double liquid slurry into the water retaining wall construction grouting hole (5), and the roof of the water retaining wall (9) is reinforced by grouting through the water retaining wall roof connecting grouting hole (4).

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