Steeply inclined parallel ore deposit parallel medium-length hole sublevel subsequent filling mining method

Abstract

The invention provides a steeply inclined parallel ore deposit parallel medium-length hole sublevel subsequent filling mining method, and relates to the technical field of underground metal mine mining. The method comprises the following steps: stoping an ore body in sections from bottom to top, and dividing the middle section into sections; performing accurate mining engineering on the stope to obtain a segmented roadway, a segmented connection way, a draw shaft, a draw shaft connection way and a pedestrian drainage ventilation raise; cutting engineering is carried out on the stope, a rock drilling and ore removal plane and a cutting well are obtained, and the rock drilling and ore removal plane is provided with upward broaching groove holes and upward parallel medium-length holes; when the upward pull slot hole is blasted, a stoping blasting compensation space is not obtained, upward parallel medium-length holes are sequentially blasted according to a stoping sequence, ores are transferred to the draw shaft based on a carry-scraper, and a vibration ore drawing machine is installed at the bottom of the draw shaft to draw and load the ores to the rail middle section mine car; and filling the stope. The engineering quantity is effectively reduced, the whole mining cost is controlled, the goaf is reasonably filled after stoping, ground pressure management can be effectively carried out, and the production cost can be reduced.

Description

Technical Field

[0001] The invention relates to the technical field of underground metal mining, in particular to a steeply inclined parallel ore bed parallel medium-deep hole segmented and subsequently filled mining method. Background Art

[0002] In recent years, with the rapid development of social economy, the demand for energy has also increased dramatically. The development of mineral resources has been vigorously developed by infrastructure construction, shifting from the surface to the underground and from the shallow to the deep. For steeply inclined ore bodies, when the surface is not allowed to collapse, high-stage jejunal subsequent filling mining method or high-segmented open field subsequent filling mining method is usually used.

[0003] For the mining of steeply inclined parallel ore bodies, the mining accuracy, cutting engineering, rock drilling and blasting before mining are of great significance. When backfill mining is applied in steeply inclined coal seams, there are problems such as complex operation, reduced production efficiency, high technical difficulty and increased enterprise costs. Summary of the invention

[0004] In order to solve a technical problem existing in the prior art, the embodiment of the present invention provides a method for mining steeply inclined parallel ore deposits with parallel medium-long holes in sections and then filling them. Effectively reducing its engineering workload is of great significance for controlling the overall mining cost. At the same time, reasonable filling of the goaf after mining can not only effectively manage the ground pressure, but also reduce the production cost. The technical solution is as follows:

[0005] A method for mining steeply inclined parallel ore deposits with parallel medium-long holes in sections and subsequent filling, characterized in that it comprises the following steps:

[0006] S1. The ore body is mined in sections from bottom to top, and the middle section is divided into sections;

[0007] S2. Implement the mining project on the stope to obtain segmented tunnels, segmented connecting roads, chute, chute connecting road, and pedestrian drainage ventilation skylight;

[0008] Carry out cutting engineering on the stope to obtain a rock drilling and ore-exiting plane and a cutting well, wherein the rock drilling and ore-exiting plane is provided with upward slot holes and upward parallel medium-depth holes;

[0009] S3, blasting the upward slot hole without obtaining the compensation space for mining blasting, blasting the upward parallel medium-deep holes in sequence according to the mining withdrawal sequence, using the scraper to transport the ore to the chute, installing a vibrating ore-discharging machine at the bottom of the chute to discharge and load the ore into the middle section mine car on the track;

[0010] S4. Fill the stope.

[0011] Optionally, the filling stope of S4 includes:

[0012] Fill retaining wall construction;

[0013] Filling pipeline laying;

[0014] Filling slurry.

[0015] Optionally, the filling retaining wall construction includes:

[0016] Arrange filling retaining walls in the horizontal segmented vein tunnels;

[0017] Wherein, the filling retaining wall is built with permeable bricks.

[0018] Optionally, the filling pipeline laying includes:

[0019] Filling pipes are drawn from the auxiliary middle section and the service well trunk line to the mining boundaries on both sides of the service well in the horizontal direction and into the goaf.

[0020] Optionally, the filling slurry comprises:

[0021] In each middle section, the first mining section uses high-strength graded tailings cementation filling within the 6m height range at the bottom and 50cm from the top, and the remaining sections use low-strength graded tailings cementation filling to construct a false roof filling body;

[0022] The top 50cm of the segmented filling body is filled with high-strength graded tailings to form a pouring surface.

[0023] The beneficial effects brought about by the technical solution provided by the embodiment of the present invention include at least:

[0024] By adopting the above technical scheme, the steeply inclined parallel ore body is divided into the middle section and the subsection, the mining area is arranged along the strike, and two-step mining is adopted, with priority given to mining the lower plate ore body, optimizing the layout of the mining and cutting projects, and reducing the amount of mining and cutting projects; the mining work is reasonably arranged, and high-intensity / low-intensity alternating filling of the goaf is adopted to reduce production costs while ensuring normal production safety; this technical bill effectively ensures safe and efficient production. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 A cross-sectional view of a method for mining steeply inclined parallel deposits with parallel medium-length holes and subsequent filling in parallel according to the present invention ( Figure 3 AA section view);

[0027] Figure 2 for Figure 1 BB section diagram in;

[0028] Figure 3 for Figure 2 CC profile in ;

[0029] Figure 4 for Figure 2 DD profile in;

[0030] In the figure: 1- chute, 2- chute connecting road, 3- rail transport middle section, 4- auxiliary middle section, 5- auxiliary ramp, 6- service shaft, 7- segmented tunnel, 8- segmented connecting tunnel, 9- segmented vein inner tunnel (through vein), 10- segmented vein outer tunnel (through vein), 11- pedestrian drainage ventilation skylight, 12- filling false tunnel, 13- rock drilling and mining plane, 14- cutting shaft, 15- grooving hole, 16- upward parallel medium and deep hole, 17- cementation filling body, 18- pouring surface, 19- first mining segmented false roof filling body. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one", "one" or "the" do not indicate a quantitative limitation, but indicate the existence of at least one. Words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0033] It should be noted that the terms "up", "down", "left", "right", "front", "back", etc. used in the present invention are only used to indicate relative position relationships. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0034] The stopes are arranged parallel to the direction of the ore body, and two-step stopes are arranged alternately to carry out the mining and cutting work. After the mining is completed, the strength of each section is divided, and high-strength filling and two-step filling are carried out respectively. The two-step stopes are arranged alternately, and low-strength filling and micro-cemented filling are carried out respectively. While reducing the amount of cement, the utilization rate of solid waste such as tailings is increased, which effectively saves the filling cost and realizes the efficient reuse of solid waste. The specific plan is as follows:

[0035] like Figures 1 to 4 As shown, a method for mining steeply inclined parallel deposits with parallel medium-long holes in sections and subsequent filling is characterized by comprising the following steps:

[0036] S1. The ore body is mined in sections from bottom to top, and the middle section is divided into sections;

[0037] The stope layout, the ore body is mined in sections from bottom to top, and the middle section is divided into sections. The stopes are arranged along the strike, with the width being the horizontal thickness of the ore body and the height being the section height. Four stopes are divided into one panel area, and the panel area is mined in one or two steps, with two stopes set at intervals in each panel area. No top pillars, bottom pillars or intermediate pillars are left in the stope. The mining project is arranged in the upper plate of the ore body, and the lower plate ore body is mined first, and the upper plate ore body is mined after the goaf is filled.

[0038] S2. Implement the mining project on the stope to obtain segmented tunnels, segmented connecting roads, chute, chute connecting road, and pedestrian drainage ventilation skylight;

[0039] Carry out cutting engineering on the stope to obtain a rock drilling and ore-exiting plane and a cutting well, wherein the rock drilling and ore-exiting plane is provided with upward slot holes and upward parallel medium-depth holes;

[0040] Mining, cutting, rock drilling. The mining engineering mainly includes segmented tunnels, segmented connecting roads, chutes, chutes connecting roads, pedestrian drainage and ventilation skylights, etc. Two ore chutes are set in each plate area, and one pedestrian drainage and ventilation skylight is set in each mining area. The cutting engineering mainly includes rock drilling and ore exiting plane and cutting wells. The cutting engineering forms a rock drilling and ore exiting plane after layered penetration in the lower plate ore body of the mining level. After the top plate of the rock drilling and ore exiting plane is exposed, support is carried out according to the ore and rock conditions. The cutting well adopts a one-time well-forming blasting technology. After the cutting well is formed, upward slot holes and upward parallel medium-depth holes are drilled in the rock drilling and ore exiting plane.

[0041] S3, blasting the upward slot hole without obtaining the compensation space for mining blasting, blasting the upward parallel medium-deep holes in sequence according to the mining withdrawal sequence, using the scraper to transport the ore to the chute, installing a vibrating ore-discharging machine at the bottom of the chute to discharge and load the ore into the middle section mine car on the track;

[0042] When mining, slot holes are blasted first to form compensation space for subsequent large-scale mining blasting. Upward parallel medium and deep holes are blasted in sequence according to the mining withdrawal sequence. Shovel loaders are used to transfer ore to chutes. Vibrating ore-discharging machines are installed at the bottom of the chute to load the ore into the middle section of the rail mine car.

[0043] S4. Fill the stope.

[0044] a. Backfill retaining wall construction: Backfill retaining walls are arranged in the horizontal segmented through-vein tunnels of mining. The backfill retaining walls are built with permeable bricks, and the outer side of the masonry wall is reinforced with a "well" structure of channel steel.

[0045] b. Laying of filling pipelines: Filling pipelines are laid from the auxiliary middle section and the service well trunk line, and are led out to the goaf through the veins at the mining boundaries on both sides of the service well in the horizontal direction. For example: filling pipelines are laid from the auxiliary middle section and the service well trunk line, and are led out to the goaf through the veins at the east and west mining boundaries (filling horizontally).

[0046] c. Filling slurry: High-strength graded tailings are used for cementing and filling within the 6m height range at the bottom and 50cm from the top of the first mining section in each middle section, and low-strength graded tailings are used for cementing and filling in the remaining sections to construct a false roof filling body; high-strength graded tailings are used for cementing and filling in the top 50cm of the section filling body to form a pouring surface.

[0047] Adopt graded tailings cementation filling. The bottom 6m and top 50cm of each middle section of the first mining section are filled with high-strength graded tailings cementation, and the rest are filled with low-strength graded tailings cementation to construct the false top filling body; the top 50cm of other section filling bodies are filled with high-strength graded tailings cementation to form a pouring surface, providing a hard surface for vehicles on the filling body and reducing ore depletion. The rest are filled with graded tailings in two steps (one step of low-strength cementation filling, and the second step of micro-cementation filling or non-cementation filling).

[0048] Filling pipes are drawn from the auxiliary middle section and the service well trunk line to the mining boundaries on both sides of the service well in the horizontal direction and into the goaf.

[0049] A specific implementation method:

[0050] The deposit of a certain mine is located in the metamorphic sedimentary rock of the Roan Super Group, in a complex, roughly elliptical NE-trending syncline. There are two high-grade ore bodies in the deposit, with a dip of SE and a dip angle of about 70°.

[0051] The ore body is mined in sections, and the order of mining is from bottom to top. The middle section is 60m high (including the auxiliary middle section), and the middle section is divided into sections. The stopes are arranged along the strike, and the width is the horizontal thickness of the ore body. The four stopes are divided into panels, and the panels are mined in one or two steps. Two stopes are set up in each panel. No top pillar, bottom pillar or intermediate pillar is left in the stope. The mining project is arranged in the upper plate of the ore body. In order to ensure the stability of the stope, it is advisable to mine the lower plate ore body first, and then mine the upper plate ore body after the goaf is filled.

[0052] The mining project mainly includes segmented tunnels, segmented connecting roads, chute, chute connecting road, pedestrian drainage ventilation skylight, etc. Two ore chutes are set up in each panel area, and one pedestrian drainage ventilation skylight is set up in each mining area. The cutting project mainly includes rock drilling and ore plane and cutting shaft.

[0053] After that, the cutting project is carried out. After the layers are connected in the lower plate of the mining level, a rock drilling plane is formed. After the top plate of the rock drilling plane is exposed, metal belt / metal mesh + anchor support is carried out according to the ore and rock conditions, and thin sprayed concrete (20mm~50mm) is supplemented when necessary.

[0054] At one end of the mining area in the rock drilling and mining plane, close to the footwall of the ore body, a cutting well (1.5m×3.0m) is excavated upward. The cutting well is a through well with a depth of 17.5m. The cutting well is constructed using a one-time well blasting technology. The diameter of the charging hole of the cutting well blast hole is 76mm, and the empty hole is expanded with a 102mm drill bit. After the cutting well is blasted, an upward slot hole (diameter 76mm, hole spacing 1.0m, row spacing 1.5m, hole depth 16.4m, deflection angle the same as the ore body inclination) and an upward parallel medium-deep hole (diameter 102mm, hole spacing 2.0m, row spacing 2.0m, hole depth 16.4m, deflection angle the same as the ore body inclination) are drilled in the rock drilling and mining plane. The medium-deep hole is constructed using a Simba1254 drilling rig and charged with a BQF-100 charge loader.

[0055] After the slot holes are blasted, a compensation space for subsequent large-scale mining blasting is formed. The parallel medium-depth holes are blasted in sequence according to the mining withdrawal order, and the ST1030 (10t) diesel scraper is used to unload the ore to the chute. A vibrating ore-discharging machine is installed at the bottom of the chute to load the ore into the middle section of the rail mine car.

[0056] Filling retaining walls are arranged in the horizontal segmented through-vein tunnels of mining. The filling retaining walls are built with permeable bricks, and the outer side of the masonry wall is reinforced with a "well" structure of channel steel.

[0057] Filling pipelines are taken from the auxiliary middle section and the service well trunk line, and are led out to the goaf in sections through the veins (filling levels) at the east and west mining boundaries.

[0058] Adopt graded tailings for cementing filling. The bottom 6m and top 50cm of each middle section of the first mining section are cemented with graded tailings with a lime-sand ratio of 1:4, and the rest are cemented with graded tailings with a lime-sand ratio of 1:10 to construct a false top filling body. The top 50cm of other section filling bodies are cemented with graded tailings with a lime-sand ratio of 1:4 to form a pouring surface, providing a hard surface for vehicles on the filling body and reducing ore depletion. The rest are filled with graded tailings in two steps (the first step is cemented filling with a lime-sand ratio of 1:10, and the second step is micro-cemented filling or non-cemented filling with a lime-sand ratio of 1:20).

[0059] By adopting the above technical scheme, the steeply inclined parallel ore body is divided into the middle section and subsections, the mining area is arranged along the strike, and two-step mining is adopted, with priority given to mining the lower plate ore body, optimizing the layout of mining and cutting projects, and reducing the amount of mining and cutting projects; the mining work is reasonably arranged, and high-intensity / low-intensity alternating filling of the goaf is adopted to reduce production costs while ensuring normal production safety; this technical bill effectively ensures safe and efficient production.

[0060] The following points need to be explained:

[0061] (1) The drawings of the embodiments of the present invention only involve structures related to the embodiments of the present invention. Other structures may refer to conventional designs.

[0062] (2) For the sake of clarity, in the drawings used to describe the embodiments of the present invention, the thickness of layers or regions is exaggerated or reduced, that is, these drawings are not drawn according to the actual scale. It is understood that when an element such as a layer, film, region or substrate is referred to as being "on" or "under" another element, the element may be "directly" "on" or "under" the other element or there may be intermediate elements.

[0063] (3) In the absence of conflict, the embodiments of the present invention and the features therein may be combined with each other to obtain new embodiments.

[0064] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. The protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A method for mining steeply inclined parallel deposits with parallel medium-long holes in sections and subsequent filling, characterized in that: The steps include: S1. The ore body is mined in sections from bottom to top, and the middle section is divided into sections; S2. Implement the mining project on the stope to obtain segmented tunnels, segmented connecting roads, chute, chute connecting road, and pedestrian drainage ventilation skylight; Carry out cutting engineering on the stope to obtain a rock drilling and ore-exiting plane and a cutting well, wherein the rock drilling and ore-exiting plane is provided with upward slot holes and upward parallel medium-depth holes; S3, blasting the upward slot hole without obtaining the compensation space for mining blasting, blasting the upward parallel medium-deep holes in sequence according to the mining withdrawal sequence, using the scraper to transport the ore to the chute, installing a vibrating ore-discharging machine at the bottom of the chute to discharge and load the ore into the middle section mine car on the track; S4. Fill the stope.

2. The method for parallel medium-long hole segmented and subsequent filling mining of steeply inclined parallel deposits according to claim 1 is characterized in that: The filling stope of S4 includes: Fill retaining wall construction; Filling pipeline laying; Filling slurry.

3. The method for mining steeply inclined parallel deposits with parallel medium-long holes and subsequent filling according to claim 2, characterized in that: The filling retaining wall construction comprises: Arrange filling retaining walls in the horizontal segmented vein tunnels; Wherein, the filling retaining wall is built with permeable bricks.

4. The method for mining steeply inclined parallel deposits with parallel medium-long holes and subsequent filling according to claim 3 is characterized in that: The filling pipeline laying includes: Filling pipes are drawn from the auxiliary middle section and the service well trunk line to the mining boundaries on both sides of the service well in the horizontal direction and into the goaf.

5. The upward segmented empty field subsequent filling mining method according to claim 3 is characterized in that: The filling slurry comprises: In each middle section, the first mining section uses high-strength graded tailings cementation filling within the 6m height range at the bottom and 50cm from the top, and the remaining sections use low-strength graded tailings cementation filling to construct a false roof filling body; The top 50cm of the segmented filling body is filled with high-strength graded tailings to form a pouring surface.

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