Concrete pouring method for shaft covered channel section wall of shaft

Abstract

The invention discloses a concrete pouring method for the wall of a covered channel section of a shaft. The concrete pouring method comprises the following steps that S1, a rock hole with the diameter being 300 mm is vertically and downwards constructed from the ground surface; s2, a shaft conveying pipe with the diameter phi of 200 mm is installed in the rock hole and is firmly poured through concrete; s3, an X-shaped support is erected in the shaft, an enamel chute is placed on the X-shaped support, and the discharging end of the bottom of a material conveying pipe of the shaft corresponds to the feeding end of the enamel chute; s4, a concrete pump truck is fixed to the position 5 m above the concrete pouring site in the shaft, and a feeding groove of the concrete pump truck corresponds to the discharging end of the enamel chute; s5, the discharging end of the concrete pump truck is connected with a formwork feeding hole in the covered channel supporting formwork in the covered channel roadway of the shaft through a buckle type connecting pipe; and S6, the concrete is pumped into a shaft conveying pipe through a commercial concrete tanker, and the concrete flows into a feeding groove of the concrete pump truck along the enamel chute through the self-flowing property.

Description

Technical Field

[0001] The invention relates to the technical field of wellbore wall casting methods, and in particular to a wellbore blind groove section wall concrete casting method. Background Art

[0002] The design length of the blind trough of the main inclined shaft of the mine is 14 meters, the vertical depth from the ground surface is between 11.5-15.4m, and the slope is -16°. During the construction, due to the particularity of the stratum structure, in order to ensure safety, the position of the blind trough was determined to be 42-166 meters below the wellhead, with a vertical depth from the ground surface between -10---46m, and the length was 111 meters longer than the existing design. The secondary pouring scheme of the blind trough section formulated by the existing design (using commercial concrete to pour from the ground surface to the blind trough feeding hole) can only meet the short-distance shaft concrete pouring project, and cannot meet the current long-distance, high vertical depth, safe and efficient construction requirements. Therefore, it is very necessary to study a low-cost and easy-to-operate method for long-distance concrete transportation for blind trough section pouring. Summary of the invention

[0003] In view of the above technical problems, the present invention provides a method for pouring concrete on the wall of a blind groove section of a shaft.

[0004] In order to achieve the above object, the technical solution of the present invention is as follows: A method for pouring concrete on the wall of a shaft blind groove section comprises the following steps: S1. Construct a φ300mm rock hole vertically downward from the ground surface; S2. Install a φ200mm shaft feed pipe in the rock hole and cast it firmly with concrete; S3, erecting an X-shaped bracket in the shaft, and placing an enamel chute on it, wherein the discharge end at the bottom of the shaft conveying pipe corresponds to the feed end of the enamel chute; S4. Fix a concrete pump truck 5 meters above the concrete pouring site in the shaft, with the feed trough of the concrete pump truck corresponding to the discharge end of the enamel chute; S5. Use a snap-on connecting pipe to connect the discharge end of the concrete pump truck to the template feed hole on the dark groove support template in the dark groove lane of the wellbore; S6. Use a commercial concrete tanker to pump concrete into the shaft feed pipe. The concrete flows along the enamel chute into the feed trough of the concrete pump truck by gravity. After being pressurized by the concrete pump truck, it is pumped into the feed hole of the template along the snap-on connecting pipe to complete the concrete pouring. After the concrete pouring is completed, the concrete pump truck, the snap-on connecting pipe and the enamel chute are removed.

[0005] Wherein, in step S3, the X-shaped bracket is welded by steel bars with a diameter of 25 mm.

[0006] Among them, in step S3, each section of the enamel chute is 1200mm long, circled into an arc shape, with a chord height of 200mm, and every two sections of the chute are connected with 4 screws of φ10mm and 20mm long, with an overlap length of 20mm. The erection of the enamel chute is based on the waistline. After erection, it must be straight and firm, without ups and downs and loose connections.

[0007] The beneficial effects of the present invention are: 1. Directly reduce manpower and material resources (saving 8 people compared to the traditional concrete transportation method, which requires 14 people for long-distance transportation of traditional concrete). Enamel chute is directly used as the concrete transportation channel to realize long-distance concrete transportation in inclined shafts.

[0008] 2. Use a concrete pump truck to pressurize the fluid concrete and transport it from the bottom to the high point (formwork inlet), requiring 6 people.

[0009] 3. This construction method was used to cast the 125-meter concealed trough of the main shaft, the 185-meter concealed trough of the auxiliary inclined shaft, and the 112-meter concealed trough of the return air inclined shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The present invention is further described below in conjunction with the accompanying drawings and embodiments: Figure 1 It is a construction schematic diagram of the present invention. DETAILED DESCRIPTION

[0011] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0012] like Figure 1 As shown, a method for pouring concrete for the wall of a shaft blind groove section comprises the following steps: S1. Construct a φ300mm rock hole vertically downward from the ground surface; S2. Install a φ200mm shaft feed pipe 2 in the rock hole and cast it firmly with concrete; S3, set up an X-shaped bracket in the shaft 8, and place the enamel chute 3 on it, wherein the discharge end at the bottom of the shaft conveying pipe 2 corresponds to the feed end of the enamel chute 3; S4, fix the concrete pump truck 4 5 meters above the concrete pouring site in the wellbore 8, and the feed trough of the concrete pump truck 4 corresponds to the discharge end of the enamel chute 3; S5, using a snap-on connecting pipe 5, the discharge end of the concrete pump truck 4 is connected to the template feed hole on the dark groove support template 6 in the dark groove lane 7 of the wellbore 8; S6. Use a commercial concrete tanker 1 to pump concrete into the shaft feed pipe 2. The concrete flows along the enamel chute 3 into the feed trough of the concrete pump truck 4 by gravity. After being pressurized by the concrete pump truck 4, the concrete is pumped into the feed hole of the template along the snap-on connecting pipe 5 to complete the concrete pouring. After the concrete pouring is completed, the concrete pump truck 4, the snap-on connecting pipe 5 and the enamel chute 3 are removed.

[0013] Wherein, in step S3, the X-shaped bracket is welded by steel bars with a diameter of 25 mm.

[0014] Among them, in the step S3, each section of the enamel chute 3 is 1200mm long, circled into an arc shape, with a chord height of 200mm, and every two sections of the chute are connected with 4 screws of φ10mm and 20mm long, with an overlap length of 20mm. The erection of the enamel chute 3 is based on the waistline. After erection, it must be straight and firm, without ups and downs and loose connections.

[0015] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the appended claims of the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the appended claims, or the equivalent forms of such scope and boundaries.

Claims

1. A method for pouring concrete on the wall of a shaft blind groove section, characterized in that: The following steps are involved: S1. Construct a φ300mm rock hole vertically downward from the ground surface; S2. Install a φ200 mm shaft feed pipe (2) in the rock hole and cast it firmly with concrete; S3, erecting an X-shaped bracket in the shaft (8), and placing an enamel chute (3) thereon, wherein the discharge end at the bottom of the shaft conveying pipe (2) corresponds to the feed end of the enamel chute (3); S4. A concrete pump truck (4) is fixed 5 meters above the concrete pouring site in the shaft (8), wherein the feed trough of the concrete pump truck (4) corresponds to the discharge end of the enamel chute (3); S5, using a snap-on connecting pipe (5), connecting the discharge end of the concrete pump truck (4) to the template feed hole on the dark groove support template (6) in the dark groove lane (7) of the shaft (8); S6. Concrete is pumped into the shaft feed pipe (2) by a commercial concrete tank truck (1). The concrete flows along the enamel chute (3) into the feed trough of the concrete pump truck (4) by gravity. The concrete is pressurized by the concrete pump truck (4) and pumped into the feed hole of the template along the snap-on connecting pipe (5) to complete the concrete pouring. After the concrete pouring is completed, the concrete pump truck (4), the snap-on connecting pipe (5) and the enamel chute (3) are removed.

2. A method for pouring concrete for the wall of a shaft blind groove section according to claim 1, characterized in that: In step S3, the X-shaped bracket is welded by steel bars with a diameter of 25 mm.

3. A method for pouring concrete for the wall of a shaft blind groove section according to claim 1, characterized in that: In step S3, each section of the enamel chute (3) is 1200 mm long and is circled into an arc shape with a chord height of 200 mm. Every two sections of the chute are connected by 4 screws with a diameter of 10 mm and a length of 20 mm, and the overlap length is 20 mm. The enamel chute (3) is set up based on the waistline. After being set up, it must be straight and firm without any ups and downs or loose connections.

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