A combined construction method of shaft-ropeway layered construction for the engine room chamber of an elevator shaft

Abstract

The invention discloses a combined layered construction method of a skylight and ropeway of an elevator shaft machine room chamber. First, the length, width, height and arch height of the machine room chamber and the sheave chamber are determined according to the construction requirements of the elevator shaft. Then, a skylight drilling rig method is used to construct a vertical skylight upward to the lower side of the sheave chamber arch. Then, the opening position and length of the ropeway are determined. After the ropeway is dug to the lower side of the sheave chamber arch, the ropeway and the skylight are connected. Personnel, materials and machinery enter the skylight through the ropeway, and the sheave chamber and the machine room chamber are blasted and expanded from top to bottom. The ropeway ballast naturally slides down to the elevator shaft connecting track after blasting. The sheave chamber and the machine room chamber ballast freely fall in the skylight. Finally, the sheave chamber and the machine room chamber are permanently supported. The invention has the characteristics of simple construction procedure, convenient slag discharge, safety, environmental protection, good ventilation effect, and can shorten the construction period, reduce construction costs, and has low safety risks.

Description

Technical Field

[0001] The present invention relates to the field of mine construction, and particularly to a combined raise-ropeway layered construction method for the headframe chamber of an elevator shaft. Background Art

[0002] An elevator shaft is a device often used in modern mine construction. When constructing the headframe chamber of an elevator shaft, it is required to excavate a large space underground, and solving the problems of tunneling and support for the headframe chamber of an elevator shaft has become a technical difficulty in current mine construction.

[0003] According to the stability degree of the chamber surrounding rock and the size of the excavation, the traditional tunneling methods for the headframe chamber usually fall into four types, namely the full-face construction method, the bench construction method, the pilot tunnel construction method, and the ore pass method. In the actual construction process, using a single construction method has certain limitations. For the headframe chamber with a large cross-section, a single construction method will make the construction difficult, with a high risk factor and low construction efficiency. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides a combined raise-ropeway layered construction method for the headframe chamber of an elevator shaft, which is simple to operate and has high construction efficiency.

[0005] The technical solution of the present invention to solve the above technical problems is: a combined raise-ropeway layered construction method for the headframe chamber of an elevator shaft, comprising the following steps:

[0006] a. Determine the length, width, height, and arch height of the headframe chamber and the sheave chamber according to the construction requirements of the elevator shaft;

[0007] b. At the central position of the sheave chamber, use a raise boring machine method to construct a vertical raise upward from the bottom of the headframe chamber to the lower side of the arch of the sheave chamber;

[0008] c. Determine the opening position and length of the ropeway according to the heights of the headframe chamber and the sheave chamber and the angle between the ropeway and the connecting passage of the elevator shaft;

[0009] d. After the ropeway is excavated to the lower side of the arch of the sheave chamber, connect the ropeway and the raise;

[0010] e. Personnel, materials, and machinery enter the raise through the ropeway, and the headframe chamber and the sheave chamber are blasted and enlarged from top to bottom; the muck of the ropeway slides down naturally to the connecting passage of the elevator shaft after blasting; the muck of the headframe chamber and the sheave chamber falls freely through the raise;

[0011] f. When constructing the headframe chamber, the sheave chamber, and the ropeway, adopt temporary support;

[0012] g. Carry out permanent support for the sheave chamber and the headframe chamber.

[0013] The above-mentioned combined shaft-ropeway layered construction method for the elevator shaft machine room chamber. In step a, the elevator shaft is excavated and divided into two chambers, namely the sheave chamber and the machine room chamber. The sheave chamber is used to install the sheave platform, and the machine room chamber is the chamber for installing the elevator shaft hoist equipment. The width of the sheave chamber is the same as the spacing of the elevator shaft, and is less than the length of the machine room chamber.

[0014] The above-mentioned combined shaft-ropeway layered construction method for the elevator shaft machine room chamber. In step b, before the tunneling starts, 5 hanging pile holes are drilled from the position of the shaft roof to the surrounding rock walls. Among them, 4 are used for the erection of the next working platform and the hanging of the ladder, and the other hanging pile rock is used for hanging the safety belts of the operators and the air and water pipes.

[0015] The above-mentioned combined shaft-ropeway layered construction method for the elevator shaft machine room chamber. In step c, the opening position of the ropeway is determined by formula (1):

[0016] (1)

[0017] The length of the ropeway is determined by formula (2):

[0018] (2)

[0019] h is the vertical distance from the crown of the sheave chamber to the crown of the elevator shaft connecting passage; a is the angle between the ropeway and the elevator shaft connecting passage, L is the length of the ropeway, Ls is the horizontal distance from the vertical projection point of the crown of the sheave chamber on the crown of the elevator shaft connecting passage to the opening position of the ropeway.

[0020] The above-mentioned combined shaft-ropeway layered construction method for the elevator shaft machine room chamber. In step d, hanging pile holes are drilled on the side wall of the ropeway for fixing steel pipes, and ladders or wire mesh platforms are hung on the steel pipes for people to stand on and support the air leg of the rock drill.

[0021] The above-mentioned combined shaft-ropeway layered construction method for the elevator shaft machine room chamber. In step e, the blasted muck is shoveled into the waste ore bin by a forklift, then shoveled to the ore pass by a loader, and lifted to the ground by a skip.

[0022] The above-mentioned combined shaft-ropeway layered construction method for the elevator shaft machine room chamber. In step f, during the construction of the sheave chamber, the machine room chamber and the ropeway, shotcrete support is adopted. The anchor bolts are pipe-split anchor bolts or mortar anchor bolts, and the exposed part of the anchor bolts is 200 mm - 300 mm. After the concrete is poured, it serves as the stabilizing concrete to prevent the concrete from sinking when the chamber is tunneling downwards.

[0023] In the above-mentioned combined layered construction method of the skylight-ropeway of the elevator shaft machine room chamber, the permanent support in step g is divided into two sections. In the first section, after the sheave chamber is excavated into place, a concrete delivery pipe is arranged along the ropeway to provide permanent concrete support for the sheave chamber; in the second section, after the machine room chamber is expanded and brushed into place, it is supported in sections from bottom to top, and the concrete delivery pipe enters along the horse head door of the machine room chamber to provide permanent support for the machine room chamber.

[0024] The beneficial effects of the present invention are as follows: the present invention first determines the length, width, height and arch height of the machine room chamber and the sheave chamber according to the requirements of the elevator shaft construction, then constructs a vertical skylight upward from the bottom of the machine room chamber to the lower side of the sheave chamber arch by using a skylight drilling method at the central position of the sheave chamber, and then determines the opening position and length of the ropeway according to the height of the machine room chamber and the sheave chamber, and the angle between the ropeway and the elevator shaft connection. After the ropeway is dug to the lower side of the arch of the sheave chamber, it penetrates the ropeway and the skylight; personnel, materials, and machinery enter the skylight through the ropeway, and the sheave chamber and the machine room chamber are blasted and expanded from top to bottom; the ropeway ballast naturally slides down to the elevator shaft after blasting; the sheave chamber and the machine room chamber ballast freely falls in the skylight; finally, during the construction of the sheave chamber, the machine room chamber and the ropeway, temporary support is adopted, and the sheave chamber and the machine room chamber are permanently supported. The present invention has the characteristics of simple construction procedure, convenient slag discharge, safety and environmental protection, and good ventilation effect, and can shorten the construction period, reduce construction costs, and have low safety risks. It not only ensures the quality and safety of the elevator shaft machine room chamber construction, but also reduces the construction cost of the machine room chamber, which has important practical significance for mine construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a construction schematic diagram of the present invention.

[0026] Figure 2 It is a schematic diagram of the construction section of the present invention.

[0027] Figure 3 This is a schematic diagram of the patio-ropeway platform. DETAILED DESCRIPTION

[0028] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0029] like Figures 1 - 3 As shown, a combined layered construction method of a ceiling-ropeway in an elevator shaft machine room chamber comprises the following steps:

[0030] a. Determine the length, width, height and arch height of the machine room chamber 4 and the sheave chamber 1 according to the elevator shaft construction requirements.

[0031] The elevator shaft excavation is divided into two chambers in layers, namely the sheave chamber 1 and the machine room chamber 4. The sheave chamber 1 is used to install the sheave platform, and the machine room chamber 4 is the chamber for installing the elevator hoist equipment. The width of the sheave chamber 1 is the same as the spacing of the elevator shaft 3, and is less than the length of the machine room chamber 4. The machine room chamber 4 is 11.05 m in height, 5.1 m in width, and 7.2 m in length; the sheave chamber 1 is 7 m in height, 5.1 m in width, 3.8 m in length, and the arch height is 2.5 m.

[0032] b. At the central position of the sheave chamber 1, a vertical raise 2 is constructed upward from the bottom of the machine room chamber 4 using a raise boring machine to the lower side of the arch of the sheave chamber 1.

[0033] Before the start of tunneling, 5 hanging pile holes are drilled in the surrounding rock walls at the roof position of the raise 2. Among them, 4 are used for erecting the next working platform and hanging the ladder, and the other hanging pile rock is used for hanging the safety belts of the operators and the air and water pipes.

[0034] c. According to the heights of the machine room chamber 4 and the sheave chamber 1, and the angle between the ropeway 5 and the elevator shaft connecting passage 6, determine the opening position and length of the ropeway 5.

[0035] The opening position of the ropeway 5 is determined by Equation (1):

[0036] (1)

[0037] The length of the ropeway 5 is determined by Equation (2):

[0038] (2)

[0039] h is the vertical distance from the arch top of the sheave chamber 1 to the arch top of the elevator shaft connecting passage 6; a is the angle between the ropeway 5 and the elevator shaft connecting passage 6, Ls is the horizontal distance from the vertical projection point of the arch top of the sheave chamber 1 on the arch top of the elevator shaft connecting passage 6 to the opening position of the ropeway.

[0040] The ropeway 5 is 3.5 m in width, 3 m in height, and 1.2 m in arch height. The vertical distance h from the arch top of the sheave chamber 1 to the arch top of the elevator shaft connecting passage 6 is 15.05 m, , the length L of the ropeway 5 is 21.67 m, and the horizontal distance Ls from the opening position of the ropeway to the vertical projection point of the arch top of the sheave chamber 1 on the arch top of the elevator shaft connecting passage 6 is 15.58 m.

[0041] d. After the ropeway 5 is excavated to the lower side of the arch of the sheave chamber 1, the ropeway 5 and the raise 2 are connected through.

[0042] Hanging pile holes are drilled on the side walls of the ropeway 5 for fixing steel pipes. Ladders or wire mesh platforms are hung on the steel pipes for people to stand on and support the air legs of the rock drills.

[0043] e. Personnel, materials, and machinery enter the raise 2 through the ropeway 5. The headframe chamber 1 and the machine room chamber 4 are blasted and enlarged from top to bottom. The muck of the ropeway 5 slides down naturally to the elevator shaft connecting passage 6 after blasting. The muck of the headframe chamber 1 and the machine room chamber 4 falls freely in the raise 2.

[0044] The blasted muck is shoveled into the waste ore bin by a forklift, then shoveled to the ore pass by a loader, and lifted to the ground by a skip.

[0045] f. When constructing the headframe chamber 1, the machine room chamber 4, and the ropeway 5, 70-mm shotcrete with bolts is used for support. The bolts are either Ф40-mm×2-m slit steel pipes or Ф20-mm×2-m grouted bolts. The exposed part of the bolts is 200 - 300 mm. After concrete pouring, it serves as stabilizing concrete to prevent the concrete from sinking when the chamber is excavated downward. Before shotcreting, the rock surface must be cleaned, the loose gangue removed, and the spraying even. Mixing is carried out strictly according to the mix ratio, and the strength and thickness of the shotcrete reach the design requirements.

[0046] g. Permanent support is carried out for the headframe chamber 1 and the machine room chamber 4.

[0047] The permanent support is divided into two sections. In the first section, after the headframe chamber 1 is excavated in place, a concrete delivery pipe is arranged along the ropeway 5 to carry out permanent concrete support for the headframe chamber 1. In the second section, after the machine room chamber 4 is enlarged and brushed in place, it is supported in sections from bottom to top. The concrete delivery pipe enters through the head gate of the machine room chamber 4 to carry out permanent support for the machine room chamber 4.

Claims

1. A method for layered construction of the patio-ropeway combination in the engine room chamber of an elevator shaft, characterized in that, It includes the following steps: a. Determine the length, width, height and arch height of the machine room chamber and the sheave chamber according to the construction requirements of the elevator shaft; b. At the central position of the sheave chamber, use raise boring method to construct a vertical raise upward from the bottom of the machine room chamber to the lower side of the arch of the sheave chamber; In step b, before the tunneling starts, drill 5 hanging pile holes around the rock wall at the position of the raise roof. Among them, 4 are used for the erection of the next operation platform and the hanging of ladders, and the other hanging pile hole is used for hanging the safety belts of the operators and the air and water pipes; c. Determine the opening position and length of the ropeway according to the heights of the machine room chamber and the sheave chamber and the angle between the ropeway and the connecting passage of the elevator shaft; d. After the ropeway is excavated to the lower side of the arch of the sheave chamber, connect the ropeway and the raise; e. Personnel, materials and machinery enter the raise through the ropeway, and the sheave chamber and the machine room chamber are blasted and enlarged from top to bottom; the muck of the ropeway slides down naturally to the connecting passage of the elevator shaft after blasting; the muck of the sheave chamber and the machine room chamber falls freely in the raise; f. During the construction of the sheave chamber, the machine room chamber and the ropeway, adopt temporary support; g. Carry out permanent support for the sheave chamber and the machine room chamber.

2. The patio-ropeway combined layered construction method for the elevator shaft machine room chamber according to claim 1, characterized in that In step a, the elevator shaft is excavated in two layers to form two chambers, namely the sheave chamber and the machine room chamber. The sheave chamber is used to install the sheave platform, and the machine room chamber is the chamber for installing the elevator hoist equipment of the elevator shaft. And the width of the sheave chamber is the same as the spacing of the elevator shaft, and is less than the length of the machine room chamber.

3. The patio-ropeway combined layered construction method for the patio of the elevator shaft machine room chamber according to claim 1, characterized in that, In step c, the opening position of the ropeway is determined by formula (1): The length of the ropeway is determined by formula (2): h is the vertical distance from the arch top of the sheave chamber to the arch top of the connecting passage of the elevator shaft; α is the angle between the ropeway and the connecting passage of the elevator shaft, L is the length of the ropeway, and Ls is the horizontal distance from the vertical projection point of the arch top of the sheave chamber on the arch top of the connecting passage of the elevator shaft to the opening position of the ropeway.

4. The patio-ropeway combined layered construction method for the patio of the elevator shaft machine room chamber according to claim 1, characterized in that, In step d, hanging pile holes are drilled on the side wall of the ropeway to fix steel pipes, and ladders or wire mesh platforms are hung on the steel pipes for people to stand on and support the legs of pneumatic drills.

5. The patio-ropeway combined layered construction method for the elevator shaft machine room chamber according to claim 1, characterized in that, In step e, the muck after blasting is shoveled into the waste ore bin by a forklift, shoveled to the ore pass by a loader, and lifted to the ground by a skip.

6. The patio-ropeway combined layered construction method for the elevator shaft machine room chamber according to claim 1, characterized in that, In step f, during the construction of the sheave chamber, the machine room chamber and the ropeway, adopt bolt-shotcrete support. The bolts adopt split-set bolts or mortar bolts, and the bolts are exposed 200mm - 300mm. After the concrete is poured, it serves as stabilizing concrete to prevent the concrete from sinking when the chamber is tunneling downward.

7. The combined shaft-ropeway layered construction method for the patio of the elevator shaft machine room chamber according to claim 1, characterized in that, The permanent support in step g is carried out in two sections. In the first section, after the sheave chamber is tunneled in place, arrange the concrete delivery pipe along the ropeway and carry out permanent concrete support for the sheave chamber; in the second section, after the machine room chamber is enlarged and brushed in place, support it in sections from bottom to top. The concrete delivery pipe enters along the head gate of the machine room chamber to carry out permanent support for the machine room chamber.

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