1. The utility model provides a downward formula mining lotion false bottom anti-drop protective structure which characterized in that: downward formula mining lotion false bottom anti-drop protective structure include buffer layer (6), cream body layer (7) and false bottom support (8), buffer layer (6) are laid in the stope bottom surface, buffer layer (6) upside has been laid and is fixed in the stope and strut (8) in the false bottom on the country rock all around, buffer layer (6) and false bottom support (8) upside space fill and fill for cream body layer (7), false bottom support (8) are including belt ring string stake (1), wear muscle (2), main muscle (3), auxiliary muscle (4), hook muscle (5), belt ring string stake (1) is beaten and is established on the country rock all around the stope, the anchor ring end exposes, adopt between the anchor ring of each belt ring string stake (1) to wear muscle (2) hookup, main muscle (3) and auxiliary muscle (4) are crisscross to be taken to weave into netted, wear muscle (2) and main muscle (3) and auxiliary muscle (4) between be connected through hook muscle (5).

2. The downward mining paste false bottom anti-drop protective structure of claim 1, characterized in that: the ring-shaped hanging piles (1) are horizontally arranged downwards at an angle of 15 degrees to 20 degrees, the anchoring depth is more than or equal to 1m, and the arrangement interval of the ring-shaped hanging piles (1) is 1000 mm/grain.

3. The downward mining paste false bottom anti-falling protection structure as claimed in claim 1 or 2, wherein: the hook rib (5) is 8-shaped or S-shaped deformed steel bar, and the installation and arrangement distance is not more than 500 mm.

4. The downward mining paste false bottom anti-drop protective structure of claim 3, characterized in that: the mesh degree of the main ribs (3) and the auxiliary ribs (4) is 30cm multiplied by 30 cm.

5. The downward mining paste false bottom anti-falling protection structure as claimed in claim 1 or 4, wherein: the buffer layer (6) is made by paving fine ores, the thickness is 200 mm, and the deviation is +/-50 mm.

Background

The paste filling mining method is a mining method with a prominent effect of controlling ore dilution and loss. In the process of mining a chamber or a lump, the filling material is conveyed to the goaf along with the advance of the stope face, so that the aims of ground pressure management and control of surrounding rock caving and ground surface collapse are fulfilled. The paste filling mining technology has the advantages of safety, environmental protection, economy, high efficiency and the like, is a research hotspot and development trend in the field of global mining industry, and is an important means for national construction of green mines and waste-free mines.

The paste filling mining method comprises an upward paste filling mining method and a downward paste filling mining method, and the downward paste filling mining method has remarkable effects on controlling ore depletion, surrounding rock caving and ground surface collapse and also has remarkable effects on improving the condition of a working roof. Therefore, as the mining depth continuously extends, the stability of the ore rock gradually becomes worse, and the downward paste filling mining method is applied to more mines. The downward paste filling mining method is promoted along with mining, the top plate is changed from raw ore rocks to a paste false bottom, and the top plate safety risk caused by loose ore rocks is effectively avoided. However, in the mining process of the downward paste mining method, phenomena such as false bottom falling, delamination, cracking and the like are often caused by the factors such as substandard paste quality, low applicability of the false bottom process, blasting vibration and the like, so that a greater safety risk is caused to operating personnel, and stable production of mine enterprises is influenced.

Disclosure of Invention

Aiming at the problems in the background art, the invention provides an anti-falling protection structure for a downward mining paste false bottom, which can effectively prevent the downward mining false bottom from falling off, cracking and the like, ensure that the quality of the false bottom reaches the standard and provide a safe and reliable operation environment for operators.

In order to achieve the purpose, the invention adopts the following technical scheme: downward formula mining lotion false bottom anti-drop protective structure include buffer layer 6, cream body layer 7 and false bottom support 8, buffer layer 6 is laid in the stope bottom surface, 6 upsides of buffer layer are laid and are fixed in the stope and support 8 at the false bottom on the country rock all around, buffer layer 6 and false bottom support 8 upside space fill and fill for cream body layer 7, false bottom support 8 includes belt ring string stake 1, wear muscle 2, main muscle 3, supplementary muscle 4, hook muscle 5, belt ring string stake 1 is beaten and is established on the country rock all around the stope, the anchor ring end, adopt between the anchor ring of each belt ring string stake 1 to wear muscle 2 hookups, main muscle 3 and supplementary muscle 4 are crisscross to be taken into the netted, wear muscle 2 and main muscle 3 and supplementary muscle 4 between be connected through hook muscle 5.

Preferably, the ring-shaped hanging piles 1 are horizontally arranged downwards at an angle of 15 degrees to 20 degrees, the anchoring depth is more than or equal to 1m, and the arrangement pitch of the ring-shaped hanging piles 1 is 1000 mm/grain.

Preferably, the hook rib 5 is a screw steel with a shape of 8 or S, and the installation and arrangement distance is not more than 500 mm.

Preferably, the main ribs 3 and the auxiliary ribs 4 have a mesh size of 30cm × 30 cm.

Preferably, the buffer layer 6 is formed by laying the powder ore, and has a thickness of 200 mm and a deviation of ± 50 mm.

The invention has the beneficial effects that:

the invention can effectively prevent the phenomena of easy falling, cracking and the like of the filling paste in downward mining, ensures the stable quality of the false bottom structure, provides a safe and reliable operation environment for operators, and has the advantages of simple process technology operation, strong applicability and easy popularization.

Drawings

Fig. 1 is a plan view of the false bottom support of the present invention.

Fig. 2 is a longitudinal sectional view of the present invention.

In the figure, 1-ring hanging pile, 2-penetrating rib, 3-main rib, 4-auxiliary rib, 5-hook rib, 6-buffer layer, 7-plaster layer and 8-false bottom support.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings to facilitate understanding of the skilled person.

Referring to fig. 1 and 2, the downward mining paste false bottom anti-falling protection structure comprises a buffer layer 6, a paste layer 7 and a false bottom support 8, wherein the buffer layer 6 is laid on the bottom surface of a chamber, and the buffer layer 6 is made of powder ore by laying, and has a thickness of 200 mm and a deviation of +/-50 mm. A false bottom support 8 is laid on the upper side of the buffer layer 6, the space on the buffer layer 6 and the false bottom support 8 is filled with a plaster layer 7, the false bottom support 8 comprises a belt ring hanging pile 1, a penetrating rib 2, a main rib 3, an auxiliary rib 4 and a hook rib 5, the belt ring hanging pile 1 is arranged on surrounding rocks around a mine room, the end of an anchor ring is exposed, the belt ring hanging pile 1 is arranged at an angle of 15 degrees to 20 degrees horizontally downwards, the anchoring depth is more than or equal to 1m, the arrangement interval of the belt ring hanging piles 1 is 1000 mm/grain, the anchor rings of each belt ring hanging pile 1 are connected through the penetrating rib 2, the main rib 3 and the auxiliary rib 4 are staggered to form a net shape, and the net degree of the main rib 3 and the auxiliary rib 4 is 30cm multiplied by 30 cm. The penetrating ribs 2 are connected with the main ribs 3 and the auxiliary ribs 4 through hook ribs 5, the hook ribs 5 are 8-shaped or S-shaped components made of phi 14 mm thread steel, and the installation and arrangement intervals are not more than 500 mm. In the next layered mining process, the paste 7, the false bottom support 8 and the surrounding rocks form a whole to bear the weight of the upper side together, so that a safe and reliable top plate is formed. Wherein, buffer layer 6 can effectively cushion the blasting vibration, effectively avoids lower floor's blasting during operation to damage the roof that 8 forms are strutted to lotion 7 and false bottom, provides the safety guarantee for the operation personnel.

Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the invention, and that, although the invention has been described in detail with reference to the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the invention as defined by the appended claims.