CONTINUOUS MINING AND DELAYED FILLING MINING METHOD FOR DEEP ORE BODY MASONRY STRUCTURE

Abstract

A continuous mining and delayed filling mining method for a deep ore body masonry structure is provided, comprising: dividing an ore body into ore blocks along a trend, internally dividing each ore block into stopes with square masonry structures, and reserving a rib pillar between the ore blocks; arranging an ore block conveyor belt gallery and a stope conveyor belt gallery at the lower parts of the ore blocks, arranging ore block crossheading and stope crossheading at the upper parts of the ore blocks, mining the stopes in the sequence from the foot wall to the hanging wall. In accordance with the present disclosure, adverse effects caused by deep high geo-stress and high geo-temperature on mining operation can be effectively overcome. The method has the advantages of low carbon and environmental protection, safety of recovery operation, high mechanization of stope operation, low labor intensity of manual operation and the like.

Claims

1. A continuous mining and delayed filling mining method for a deep ore body masonry structure, comprising the following steps: (1) ore block and stop arrangement: dividing an ore body into ore blocks along a trend, internally dividing each ore block into strips, and internally dividing each strip into stopes with square masonry structures, and reserving a rib pillar between the ore blocks; (2) preliminary mining design arrangement and construction: horizontally constructing an ore block conveyor belt gallery in the rib pillar from a sub-level haulage roadway at the middle section to the boundary of the hanging wall of the ore body, and constructing a stope conveyor belt gallery along the trend from the ore block conveyor belt gallery so as to connect the stopes on the same strip in the trend direction; horizontally constructing ore block crossheading in the rib pillar from the sub-level haulage roadway at the upper middle section, and constructing stope crossheading from the ore block crossheading in the trend so as to connect the stopes on the same strip along the trend direction, wherein the ore blocks at both sides of the rib pillar share one ore block conveyor belt gallery and the ore block crossheading, the ore block conveyor belt gallery is in communication with the end part ore block crossheading through a service raise, and the ore block conveyor belt gallery communicates with an ore drop shaft; and (3) ore block mining and filling: mining the stops in the sequence from the foot wall to the hanging wall, that is, first mining the stops in the strip close to the foot wall, and then mining the stopes in the strip close to the hanging wall, wherein the stopes in the same strip are mined in a retreating manner from the side away from the ore block conveyor belt gallery to the side of the ore block conveyor belt gallery, and stopes in the corresponding strips on both sides of the rib pillar are subjected to mining and filling in a staggered manner; during stope mining, firstly, performing full-section expanding brush on the stope crossheading in a mining stope range to form an upper operation chamber, constructing, by a raise boring machine, a slot raise at the center of the upper operation chamber to be in communication with the stop conveyor belt gallery at the lower parts of the stope, and constructing, by a down-the-hole drill, a downward medium-depth hole around the slot raise; installing an ore drawing funnel at the bottom of the slot raise, installing conveyor belts in the stope conveyor belt gallery and the ore block conveyor belt gallery, wherein a material receiving end of the conveyor belt is located on the lower part of the ore drawing funnel of the mining stope, and a discharging end of the conveyor belt is located at the ore drop shaft; filling detonator explosives into the downward medium-depth hole in the upper operation chamber of the stope; performing millisecond subsection blasting for ore breaking, drawing the caved ore onto the conveyor belt through the ore drawing funnel and conveying the caved ore to the ore drop shaft through the conveyor belt, constructing filling retaining walls at the end parts of the stope conveyor belt gallery and the stope crossheading after the blasting ore drawing of the stope is completed and filling the stope, and repeating the steps until the stopes in the ore block are completely mined and filled.

2. The continuous mining and delayed filling mining method for the deep ore body masonry structure according to claim 1, wherein the ore block has a length of 50 m to 60 m, and a width of the thickness of the ore body, the stope has a plane size of 6 m6 m to 10 m10 m, and the rib pillar has a width of 8 m to 10 m.

3. The continuous mining and delayed filling mining method for the deep ore body masonry structure according to claim 1, wherein the ore drawing funnel, the conveyor belt and ore drawing equipment at the lower part of the ore drop shaft are subjected to intelligent linkage closed-loop control, are started and stopped at the same time during ore drawing of the stope.

4. The continuous mining and delayed filling mining method for the deep ore body masonry structure according to claim 1, wherein the hole bottom of the downward medium-length hole is arranged in an inverted cone shape by taking the bottom of the slot raise as the center; the hole bottom gradually rises from inside to outside, and a conical funnel bottom structure is formed at the lower part of the stope after blasting.

5. The continuous mining and delayed filling mining method for the deep ore body masonry structure according to claim 1, wherein during stope filling, a filling body in a lime-sand ratio larger than or equal to 1:8 is adopted for filling.

6. The continuous mining and delayed filling mining method for the deep ore body masonry structure according to claim 4, wherein the hole bottom of the downward medium-depth hole is arranged in an inverted cone shape, and the conical inclined face has an inclined angle of 50 to 55.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0023] FIG. 1 is a front view of a continuous mining and delayed filling mining method for a deep ore body masonry structure in accordance with an embodiment;

[0024] FIG. 2 is a sectional view of an A-A line in the front view of a continuous mining and delayed filling mining method for a deep ore body masonry structure in accordance with an embodiment.

[0025] FIG. 3 is a sectional view of a B-B line in the front view of a continuous mining and delayed filling mining method for a deep ore body masonry structure in accordance with an embodiment.

[0026] FIG. 4 is a sectional view of a C-C line in the front view of a continuous mining and delayed filling mining method for a deep ore body masonry structure in accordance with an embodiment.

[0027] In the drawings: 1rib pillar; 2ore block conveyor belt gallery; 3stope conveyor belt gallery; 4ore block crossheading, 5stope crossheading, 6service raise; 7ore drop shaft; 8upper operation chamber; 10downward medium-depth hole; 11ore drawing funnel; 12conveyor belt; 13filling body.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The following clearly and completely describes the technical solutions in the embodiments of the present disclosure with reference to the accompanying drawings in the embodiments of the present disclosure. Apparently, the described embodiments are merely a part rather than all of the embodiments of the present disclosure. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present disclosure without creative efforts shall fall within the protection scope of the present disclosure.

EMBODIMENT I

[0029] Refer to FIG. 1 to FIG. 4, a continuous mining and delayed filling mining method for a deep ore body masonry structure shown in the figures is a preferred solution of the present disclosure. The technical solution provided by the present disclosure comprises the following steps:

[0030] (1) Ore block and stop arrangement: an ore body is divided into ore blocks along a trend, each ore block having a length of 50 m and a width of the thickness of the ore body; each ore block is internally divided into strips along the trend, and each strip is internally divided into stopes with square masonry structures, each stope having a plane size of 8 m8 m; and a rib pillar 1 is reserved between the ore blocks, the rib pillar 1 having a width of 8 m.

[0031] (2) preliminary mining design arrangement and construction: an ore block conveyor belt gallery 2 is horizontally constructed in the rib pillar 1 from a sub-level haulage roadway at the middle section to the boundary of the hanging wall of the ore body, and a stop conveyor belt gallery 3 is constructed from the ore block conveyor belt gallery 2 along the trend so as to connect the stopes on the same strip in a trend direction; ore block crossheading 4 is horizontally constructed in the rib pillar 1 from the sub-level haulage roadway at the upper middle section, and stope crossheading 5 is constructed from the ore block crossheading 4 in the trend so as to connect the stopes on the same strip in the trend direction; the ore blocks at both sides of the rib pillar 1 share one ore block conveyor belt gallery 2 and the ore block crossheading 4, the ore block conveyor belt gallery 2 is in communication with the end part ore block crossheading 4 through a service raise 6, and the ore block conveyor belt gallery 2 communicates with an ore drop shaft 7.

[0032] (3) Ore block mining and filling: the stops are mined in the sequence from the foot wall to the hanging wall, that is, the stops in the strip close to the foot wall are mined at first, and the stopes in the strip close to the hanging wall are mined; the stopes in the same strip are mined in a retreating manner from the side away from the ore block conveyor belt gallery 2 to the side of the ore block conveyor belt gallery 2, and the stopes in the corresponding strips on both sides of the rib pillar 1 are subjected to mining and filling in a staggered manner. As shown in FIG. 2 and FIG. 3, the stopes in the ore block are internally divided in a strip 1, a strip 2 and a strip 3. The strip 1 is internally divided into a 1-1 stope, a 1-2 stope, a 1-3 stope, a 1-4 stope, a 1-5 stope, a 1-6 stope, a 1-7 stope, a 1-8 stope, a 1-9 stope and a 1-10 stope; the strip 2 is internally divided into a 2-1 stope, a 2-2 stope, a 2-3 stope, a 2-4 stope, a 2-5 stope, a 2-6 stope, a 2-7 stope, a 2-8 stope, a 2-9 stope and a 2-10 stope; the strip 3 is internally divided into a 3-1 stope, a 3-2 stope, a 3-3 stope, a 3-4 stope, a 3-5 stope, a 3-6 stope, a 3-7 stope, a 3-8 stope, a 3-9 stope and a 3-10 stope. The mining sequence of the whole stope is as follows: the 1-1 stope, the 1-2 stope, the 1-3 stope, the 1-4 stope, the 1-5 stope, the 1-6 stope, the 1-7 stope, the 1-8 stope, the 1-9 stope, the 1-10 stope, the 2-1 stope, the 2-2 stope, the 2-3 stope, the 2-4 stope, the 2-5 stope, the 2-6 stope, the 2-7 stope, the 2-8 stope, the 2-9 stope, the 2-10 stope, the 3-1 stope, the 3-2 stope, the 3-3 stope, the 3-4 stope, the 3-5 stope, the 3-6 stope, the 3-7 stope, the 3-8 stope, the 3-9 stope and the 3-10 stope. During stope mining, firstly, the stope crossheading 5 in a mining stope range is subjected to full-section expanding brush to form an upper operation chamber 8, a raise boring machine is configured to construct a slot raise 9 at the center of the upper operation chamber 8 to be in communication with the stop conveyor belt gallery 3 at the lower part of the stope, and a down-hole drill is configured to construct a downward medium-depth hole 10 around the slot raise 9.

[0033] The hole bottom of the downward medium-depth hole 10 is arranged in an inverted cone shape by taking the hole bottom of the slot raise 9 as the center, the conical inclined face has an inclined angle of 55, the hole bottom gradually rises from inside to outside, and a conical funnel bottom structure is formed at the lower part of the stope after blasting. An ore drawing funnel 11 is installed at the bottom of the slot raise 9, conveyor belts 12 are installed in the stope conveyor belt gallery 3 and the ore block conveyor belt gallery 2, a material receiving end of the conveyor belt 12 is located on the lower part of the ore drawing funnel 11 of the mining stope, and a discharging end of the conveyor belt 12 is located at an ore drop shaft 7; the ore drawing funnel 11, the conveyor belt 12 and ore drawing equipment at the lower part of the ore drop shaft 7 are subjected to intelligent linkage closed-loop control, are started and stopped at the same time during ore drawing of the stope. Detonator explosives are filled into the downward medium-depth hole 10 in the upper operation chamber 8 of the stope; millisecond subsection blasting is carried out for ore breaking, the caved ore are drawn onto the conveyor belt 12 through the ore drawing funnel 11 and conveyed to the ore drop shaft 7 through the conveyor belt 12, a filling retaining wall is constructed at the end parts of the stope conveyor belt gallery 3 and the stope crossheading 5 after the blasting ore-drawing of the stope is completed, and the stope is filled with a filling body 13 in a lime-sand ratio larger than or equal to 1:8. The steps are repeated until the stopes in the ore block are completely mined and filled.

EMBODIMENT II

[0034] Refer to FIG. 1 to FIG. 4, a continuous mining and delayed filling mining method for a deep ore body masonry structure shown in the figures is a preferred solution of the present disclosure. The technical solution provided by the present disclosure comprises the following steps:

[0035] (1) Ore block and stop arrangement: an ore body is divided into ore blocks along a trend, each ore block having a length of 50 m and a width of the thickness of the ore body; each ore block is internally divided into strips along the trend, and each strip is internally divided into stopes with square masonry structures, each stope having a plane size of 8 m8 m; and a rib pillar 1 is reserved between the ore blocks, the rib pillar 1 having a width of 10 m.

[0036] (2) Preliminary mining design arrangement and construction: an ore block conveyor belt gallery 2 is horizontally constructed in the rib pillar 1 from a sub-level haulage roadway at the middle section to the boundary of the hanging wall of the ore body, and a stop conveyor belt gallery 3 is constructed from the ore block conveyor belt gallery 2 along the trend so as to connect the stopes on the same strip in a trend direction; ore block crossheading 4 is horizontally constructed in the rib pillar 1 from the sub-level haulage roadway at the upper middle section, and stope crossheading 5 is constructed from the ore block crossheading 4 in the trend so as to connect the stopes on the same strip in the trend direction; the ore blocks at both sides of the rib pillar 1 share one ore block conveyor belt gallery and the ore block crossheading 4, the ore block conveyor belt gallery 2 is in communication with the end part of ore block crossheading 4 through a service raise 6, and the ore block conveyor belt gallery 2 communicates with an ore drop shaft 7.

[0037] (3) Ore block mining and filling: the stops are mined in the sequence from the foot wall to the hanging wall, that is, the stops in the strip close to the foot wall are mined at first, and the stopes in the strip close to the hanging wall are mined; the stopes in the same strip are mined in a retreating manner from the side away from the ore block conveyor belt gallery 2 to the side of the ore block conveyor belt gallery 2, and the stopes in the corresponding strips on both sides of the rib pillar 1 are subjected to mining and filling in a staggered manner. As shown in FIG. 2 and FIG. 3, the stopes in the ore block are internally divided in a strip 1, a strip 2 and a strip 3. The strip 1 is internally divided into a 1-1 stope, a 1-2 stope, a 1-3 stope, a 1-4 stope, a 1-5 stope, a 1-6 stope, a 1-7 stope, a 1-8 stope, a 1-9 stope and a 1-10 stope; the strip 2 is internally divided into a 2-1 stope, a 2-2 stope, a 2-3 stope, a 2-4 stope, a 2-5 stope, a 2-6 stope, a 2-7 stope, a 2-8 stope, a 2-9 stope and a 2-10 stope; the strip 3 is internally divided into a 3-1 stope, a 3-2 stope, a 3-3 stope, a 3-4 stope, a 3-5 stope, a 3-6 stope, a 3-7 stope, a 3-8 stope, a 3-9 stope and a 3-10 stope. The mining sequence of the whole stope is as follows: the 1-1 stope, the 1-2 stope, the 1-3 stope, the 1-4 stope, the 1-5 stope, the 1-6 stope, the 1-7 stope, the 1-8 stope, the 1-9 stope, the 1-10 stope, the 2-1 stope, the 2-2 stope, the 2-3 stope, the 2-4 stope, the 2-5 stope, the 2-6 stope, the 2-7 stope, the 2-8 stope, the 2-9 stope, the 2-10 stope, the 3-1 stope, the 3-2 stope, the 3-3 stope, the 3-4 stope, the 3-5 stope, the 3-6 stope, the 3-7 stope, the 3-8 stope, the 3-9 stope and the 3-10 stope. During stope mining, firstly, the stope crossheading 5 in a mining stope range is subjected to full-section expanding brush to form an upper operation chamber 8, a raise boring machine is configured to construct a slot raise 9 at the center of the upper operation chamber 8 to be in communication with the stop conveyor belt gallery 3 at the lower part of the stope, and a down-hole drill is configured to construct a downward medium-depth hole 10 around the slot raise 9.

[0038] The hole bottom of the downward medium-depth hole 10 is arranged in an inverted cone shape by taking the hole bottom of the slot raise 9 as the center, the conical inclined face has an inclined angle of 50, the hole bottom gradually rises from inside to outside, and a conical funnel bottom structure is formed at the lower part of the stope after blasting. An ore drawing funnel 11 is installed at the bottom of the slot raise 9, conveyor belts 12 are installed in the stope conveyor belt gallery 3 and the ore block conveyor belt gallery 2, a material receiving end of the conveyor belt 12 is located on the lower part of the ore drawing funnel 11 of the mining stope, and a discharging end of the conveyor belt 12 is located at an ore drop shaft 7; the ore drawing funnel 11, the conveyor belt 12 and ore drawing equipment at the lower part of the ore drop shaft 7 are subjected to intelligent linkage closed-loop control, are started and stopped at the same time during ore drawing of the stope. Detonator explosives are filled into the downward medium-depth hole 10 in the upper operation chamber 8 of the stope; millisecond subsection blasting is carried out for ore breaking, the caved ore are drawn onto the conveyor belt 12 through the ore drawing funnel 11 and conveyed to the ore drop shaft 7 through the conveyor belt 12, a filling retaining wall is constructed at the end parts of the stope conveyor belt gallery 3 and the stope crossheading 5 after the blasting ore-drawing of the stope is completed, and the stope is filled with a filling body 13 in a lime-sand ratio larger than or equal to 1:6. The steps are repeated until the stopes in the ore block are completely mined and filled.

[0039] The foregoing descriptions are merely specific embodiments of the present disclosure, but are not intended to limit the scope of protection the present disclosure. Any variation or replacement made by a person skilled in the art according to the technical solutions of the present disclosure and its inventive concept within the technical scope disclosed in the present disclosure should be encompassed within the scope of protection of the present disclosure.