阅读说明：本技术 一种高大硐室的双溜井-斜巷组合式分层施工方法 (Double-chute-inclined roadway combined layered construction method for big and high chamber ) 是由 闫小兵 谢守冬 李萍丰 彭华斌 马正腾 谭三元 杨瑞 赵延林 于 2021-08-20 设计创作，主要内容包括：本发明公开了一种高大硐室的双溜井-斜巷组合式分层施工方法,包括以下步骤：确定硐室的长度、宽度、高度以及硐室拱高；确定硐室的分层高度；施工下部直巷；施工出渣平巷；施工下部曲巷；施工上山斜巷；施工凿岩平台；施工上部直巷；施工出渣溜井；在凿岩平台和上部直巷上扩刷拱顶至硐室拱顶掘支完成,利用出渣溜井和出渣平巷出渣；分层施工,直至硐室施工完成。本发明具有出渣成本低、出渣工艺简单、安全环保、通风效果好的特点,并且能够降低施工成本、降低安全风险且质量容易控制。(The invention discloses a double-chute-inclined roadway combined type layered construction method of a big-rise chamber, which comprises the following steps: determining the length, width, height and chamber arch height of the chamber; determining the layered height of the chamber; constructing a lower straight roadway; constructing a slag tapping gallery; constructing a lower curved roadway; constructing a mountain ascending inclined roadway; constructing a rock drilling platform; constructing an upper straight roadway; constructing a slag tapping chute; c, expanding and brushing the vault on the rock drilling platform and the upper straight roadway until the vault of the chamber is excavated, and discharging slag by using a slag discharge chute and a slag discharge roadway; and (5) performing layered construction until the chamber construction is completed. The invention has the characteristics of low slag discharging cost, simple slag discharging process, safety, environmental protection and good ventilation effect, can reduce the construction cost and the safety risk, and has easy quality control.)

1. A double-pass shaft-inclined roadway combined type layered construction method for a big-rise chamber is characterized by comprising the following steps:

a. determining the length, width and height of the chamber and the chamber arch height according to the chamber construction requirements;

b. determining the layered height of the chamber according to the height of the chamber;

c. constructing a lower straight lane which reaches the central axis of the chamber along the middle position of one side of the chamber opening, and determining the section size of the lower straight lane;

d. constructing a slag tapping gallery in the middle position of the bottom of the chamber along the length direction of the chamber, wherein the slag tapping gallery directly reaches the front end and the rear end of the chamber, and determining the section size of the slag tapping gallery;

e. constructing a lower curved roadway which reaches the left upper of the chamber along the lower straight roadway, wherein the distance between the center line position of the lower curved roadway and the tail end of the chamber is 10m, and the lower curved roadway is communicated with the lower straight roadway to determine the section size of the lower curved roadway;

f. constructing an upward inclined roadway reaching the arch part of the chamber along the left wall of the chamber on one side of the lower curved roadway, wherein the central line of the upward inclined roadway and the central line of the lower curved roadway form an angle of 12 degrees;

g. constructing a rock drilling platform communicated with an ascending inclined roadway at a first layering position at the front end of the underground chamber, and determining the height and the section size of the rock drilling platform;

h. constructing an upper straight roadway on one side of the rock drilling platform, and determining the height and the section size of the upper straight roadway;

i. constructing vertical slag-tapping chutes which reach the first layered position of the chamber at the front end and the rear end of a slag-tapping gallery at the bottom of the chamber, wherein the slag-tapping chute at the front end is communicated with the upper straight gallery, and the slag-tapping chute at the rear end is connected with the first layered interface to determine the height and the section size of the slag-tapping chute;

j. c, expanding and brushing the vault on the rock drilling platform and the upper straight roadway until the vault of the chamber is excavated, and discharging slag by using a slag discharge chute and a slag discharge roadway;

k. the construction method of the subsequent layering is the same as the first layering construction step until the chamber construction is finished.

2. The method of claim 1, wherein said chambers are closed at front and rear ends, and only lower vertical tunnels are used as personnel entrances and exits.

3. The double-pass shaft-inclined roadway combined type layered construction method for the adit chamber as claimed in claim 1, wherein in the step a, the arching height of the chamber is designed according to 1/3-1/4 of the width of the chamber.

4. The method as claimed in claim 1, wherein in the step j, in order to facilitate the blasting of the arch part by perforating, a working platform is erected by a frame pipe during each blasting, the excavated gangue is shoveled to the slag-tapping chute by a loader, falls to a slag-tapping gallery, is transported to a gangue bin by a scraper, is lifted to the ground by a skip, after the excavation of the arch part is completed, an anchor rod hanging point is preset at the top of the chamber, during the construction process, if the surrounding rock of the arch part is unstable after the excavation, the cross section of the arch part of the chamber is checked according to a middle waist line, and after the cross section is qualified, permanent support is sprayed by anchor cables and anchor nets, concrete is sprayed by the anchor cables and the anchor nets, and the permanent support with the strength grade of C25 and 200mm is performed.

5. The method of claim 1, wherein the front-end draw shaft is connected to the slag shaft and the upper straight shaft, and the rear-end draw shaft is connected to the first layered interface and the slag shaft, and is constructed in a double-draw mode.

6. The double-pass-inclined roadway combined type layered construction method for the large chamber according to claim 1, wherein in the step k, during the tunneling, the side is found and the net is hung and the anchor rod is tied to spray anchor slurry for supporting, and after the front end and the rear end of the chamber are constructed, the front end and the rear end of the chamber are permanently supported from top to bottom until the chamber is constructed.

Technical Field

The invention relates to the field of mine construction, in particular to a double-chute-inclined roadway combined type layered construction method for a big-rise chamber.

Background

The increase of mining scale and the improvement of mechanization level of the mine provide space for the use of large underground mine chambers, and the popularization rate of the large underground mine chambers is higher and higher. The traditional chamber tunneling method is generally divided into four methods, namely a full-section construction method, a step construction method, a pilot chamber construction method and a ore-sliding method, according to the stability degree and the excavation size of surrounding rock of the chamber, however, the four methods have certain limitations, or are influenced by the section size, the construction difficulty is large, the construction efficiency is low, or are influenced by the chamber size and the surrounding rock conditions, the span is large, the section is large and variable, the inlet and outlet channels are narrow, the mutual interference is large, the applicability is poor, and the potential safety hazard in the construction process is correspondingly increased; if a full-section construction method is adopted, the problems that the preliminary bracing procedure is complex, the exposed area of surrounding rocks of the top plate is large, and the personnel safety is difficult to guarantee exist, the slag is difficult to discharge, the ventilation is difficult to guarantee, the investment is large, and the construction cost is high. Therefore, the construction method suitable for the big underground chamber is researched and provided, the quality and the safety of the mine underground chamber construction are ensured, the underground chamber construction cost is reduced, and the construction method has important practical significance for the mine construction.

Disclosure of Invention

In order to solve the technical problems, the invention provides a double-chute-inclined roadway combined type layered construction method of a big chamber, which is simple to operate and high in construction efficiency.

The technical scheme for solving the problems is as follows: a double-pass shaft-inclined roadway combined type layered construction method for a big-rise chamber comprises the following steps:

a. determining the length, width and height of the chamber and the chamber arch height according to the chamber construction requirements;

b. determining the layered height of the chamber according to the height of the chamber;

c. constructing a lower straight lane which reaches the central axis of the chamber along the middle position of one side of the chamber opening, and determining the section size of the lower straight lane;

d. constructing a slag tapping gallery in the middle position of the bottom of the chamber along the length direction of the chamber, wherein the slag tapping gallery directly reaches the front end and the rear end of the chamber, and determining the section size of the slag tapping gallery;

e. constructing a lower curved roadway which reaches the left upper of the chamber along the lower straight roadway, wherein the distance between the center line position of the lower curved roadway and the tail end of the chamber is 10m, and the lower curved roadway is communicated with the lower straight roadway to determine the section size of the lower curved roadway;

f. constructing an upward inclined roadway reaching the arch part of the chamber along the left wall of the chamber on one side of the lower curved roadway, wherein the central line of the upward inclined roadway and the central line of the lower curved roadway form an angle of 12 degrees;

g. constructing a rock drilling platform communicated with an ascending inclined roadway at a first layering position at the front end of the underground chamber, and determining the height and the section size of the rock drilling platform;

h. constructing an upper straight roadway on one side of the rock drilling platform, and determining the height and the section size of the upper straight roadway;

i. constructing vertical slag-tapping chutes which reach the first layered position of the chamber at the front end and the rear end of a slag-tapping gallery at the bottom of the chamber, wherein the slag-tapping chute at the front end is communicated with the slag-tapping gallery and an upper straight gallery, and the slag-tapping chute at the rear end is constructed to the first layered interface and is communicated with the slag-tapping gallery to determine the height and the section size of the slag-tapping chute;

j. c, expanding and brushing the vault on the rock drilling platform and the upper straight roadway until the vault of the chamber is excavated, and discharging slag by using a slag discharge chute and a slag discharge roadway;

k. and the construction method of the subsequent layering is the same as the construction step of j until the chamber construction is finished.

According to the double-drop shaft-inclined roadway combined layered construction method for the big-rise chamber, the front end and the rear end of the chamber are in a closed state, and only the lower straight roadway is used as a personnel entrance or exit.

In the step a, the arching height of the chamber is designed according to 1/3-1/4 of the width of the chamber.

In the step j, in order to facilitate the layered holing blasting of the arch part, a working platform is erected by using a frame pipe to carry out holing when each gun is tunneled, tunneled waste rocks are shoveled to a slag discharging chute by using a loader, fall to a slag discharging drift, then are transported to a waste rock bin by using a scraper, are lifted to the ground through a skip, after the tunneling of the arch part of the chamber is completely finished, anchor rod hoisting points are preset at the top of the chamber, in the construction process, if surrounding rocks of the arch part are unstable after the excavation, the cross section of the arch part of the chamber is checked according to a middle waist line, and after the cross section is qualified, permanent support is sprayed on anchor cables and anchor nets, concrete is sprayed on the anchor cables and the anchor nets, and permanent support with the strength grade of C25 and 200mm is carried out.

According to the double-chute-inclined roadway combined layered construction method for the elevated chamber, the front-end slag-discharging chute is communicated with the slag-discharging roadway and the upper straight roadway, the rear-end slag-discharging chute is constructed to the first layered interface and is communicated with the slag-discharging roadway, and a double-chute mode is adopted for construction.

In the step k, during the tunneling process, the side is found while the net is hung, the anchor rod is tied, the anchor slurry is sprayed and supported, and after the front end and the rear end of the chamber are constructed, the front end and the rear end of the chamber are permanently supported from top to bottom in sequence until the chamber construction is finished.

The invention has the beneficial effects that: the invention has the characteristics of simple slag tapping process, safety, environmental protection and good ventilation effect, can reduce the construction cost and the safety risk, and has easy quality control.

Drawings

FIG. 1 is a schematic view of the construction of the present invention.

FIG. 2 is a schematic cross-sectional view of the construction of the present invention.

Fig. 3 is a schematic view of a horizontal inclined drift-rock drilling platform.

Detailed Description

The invention is further described below with reference to the accompanying drawings and examples.

As shown in fig. 1-3, a double-pass shaft-inclined roadway combined layered construction method for a big-rise chamber comprises the following steps:

a. the length, width and height of the chamber 1 and the height of the chamber 1 are determined according to the construction requirements of the chamber 1. The length of the chamber 1 exceeds 100m, the height exceeds 30m, the width exceeds 15m, the arch height exceeds 6m, the arching height of the chamber 1 is designed according to 1/3-1/4 of the width of the chamber 1, and the arching height of the chamber 1 is determined to be 6.5m by calculation if the arching height of the chamber 1 is 6.66 m-5.0 m.

b. The layered height of the chamber 1 is determined according to the height of the chamber 1.

Because the span and the length of the chamber 1 are large, the division of the layered height of the chamber 1 should meet the construction requirement and the rock drilling requirement, the first layer 9 is 6.5m, the second layer 10, the third layer 11, the fourth layer 12 and the fifth layer 13 are 5.0m, and the sixth layer 14 is 5.5 m.

c. And constructing a lower straight lane 2 which reaches the central axis of the chamber 1 along the middle position of the opening side of the chamber 1, and determining the section size of the lower straight lane 2.

The front end and the rear end of the chamber 1 are in a closed state, and only the lower straight lane 2 is used as a personnel entrance and exit. The section size of the lower straight lane 2 meets the passing requirements of mechanical equipment and personnel.

d. And constructing a slag tapping gallery 3 at the middle position of the bottom of the chamber 1 along the length direction of the chamber 1, wherein the slag tapping gallery 3 directly reaches the front end and the rear end of the chamber 1, and the section size of the slag tapping gallery 3 is determined. In order to facilitate the rapid slag discharge, the position of the slag discharge gallery 3 is selected at the middle position of the chamber 1 in the length direction, and the section size is 3m wide and 3m high.

e. And constructing a lower curved lane 4 which reaches the left upper side of the chamber 1 along the lower straight lane 2, wherein the distance between the central line of the lower curved lane 4 and the tail end of the chamber 1 is 10m, the lower curved lane 4 is adopted to prevent overlarge gradient so as to ensure crawling of construction machinery and passing of personnel, the lower curved lane 4 is communicated with the lower straight lane 2, and the section size of the lower curved lane 4 is the same as that of the lower straight lane 2.

f. An uphill inclined roadway 5 is constructed on one side of the lower curved roadway 4 along the left upper part of the chamber 1 and reaches the arch part of the chamber 1, the center line of the uphill inclined roadway 5 and the center line of the lower curved roadway 4 form an angle of 12 degrees, and the uphill inclined roadway 5 is mainly used for temporarily storing gangue and slag ore and facilitating the transportation of the slag ore.

g. And constructing a rock drilling platform 6 communicated with the ascending inclined roadway 5 at the position of the first layer 9 at the front end of the chamber 1, wherein the length of the rock drilling platform 6 exceeds 5m, and the height and the section size of the rock drilling platform 6 are determined to meet the rock drilling requirement of construction, so that the construction with high efficiency is facilitated.

h. An upper straight roadway 8 is constructed on one side of the rock drilling platform 6, the length of the upper straight roadway 8 exceeds 6m, the height and the section size of the upper straight roadway 8 meet the rock drilling requirements of construction, and high-efficiency construction is facilitated.

i. Constructing vertical slag-tapping chutes 7 reaching the first layering 9 position of the chamber 1 at the front end and the rear end of a slag-tapping gallery 3 at the bottom of the chamber 1 respectively, wherein the number of the slag-tapping chutes 7 is 2, the size of each slag-tapping chute 7 is 3m in diameter and 25.5m in height, the front-end slag-tapping chute 7 is communicated with the slag-tapping gallery 3 and an upper straight gallery 8, and the rear-end slag-tapping chute 7 is constructed to the interface of the first layering 9 and communicated with the slag-tapping gallery 3 at a distance of 114 m; and (5) constructing by adopting a double-pass mode.

j. And c, expanding and brushing the vault on the rock drilling platform 6 and the upper straight roadway 8 until the vault of the chamber 1 is excavated, and discharging slag by using a slag discharging chute 7 and a slag discharging roadway 3.

In order to facilitate the layered holing blasting of the arch part, a working platform is erected by a frame pipe during tunneling, tunneled waste rocks are shoveled to a slag discharge chute 7 by a loader, fall to a slag discharge gallery 3, are transported to a waste rock bin by a scraper, are lifted to the ground by a skip, and can be transported by an ascending inclined gallery 5, after the tunneling of the arch part of the chamber 1 is completed completely, anchor rod hoisting points are preset at the top of the chamber 1, so that convenience is provided for later equipment installation; in the construction process, if the surrounding rock of the arch part is unstable after excavation, the cross section of the arch part of the chamber 1 is checked according to the middle waist line, after the cross section is qualified, permanent support is sprayed on the anchor cables and the anchor nets, the concrete is sprayed on the anchor cables and the anchor nets, and the permanent support is permanently supported with the strength grade of C25 and the thickness of 200 mm.

k. The construction method of the subsequent layering is the same as the construction step of j until the construction of the chamber 1 is completed.

And (3) finding the side and hanging a net and drilling an anchor rod and spraying anchor slurry to support in the tunneling process, and after the construction of the front end and the rear end of the chamber 1 is finished, sequentially carrying out permanent support on the front end and the rear end of the chamber 1 from top to bottom until the construction of the chamber 1 is finished.