阅读说明：本技术 一种矿场充填体假底的底部结构施工方法 (Bottom structure construction method of mine field filling body false bottom ) 是由 李孝成 屠涛 岳文龙 王小良 于 2021-08-13 设计创作，主要内容包括：本发明公开了一种矿场充填体假底的底部结构施工方法,涉及矿山井下回采的技术领域,具有以下步骤：选取矿房已充填采场,且充填强度和养护期已经达到要求,具备开挖条件,备用；开挖时,先从穿脉往里开挖出矿进路,再从施工中孔凿岩巷,待巷道施工完成后,紧接着施工切割天井、中深孔,直至中深孔爆破结束,形成V形暂沟底部受矿结构；本申请具有回采矿石多,矿石损失率明显降低、减小了对出矿穿脉的爆破震动影响、为以后二步骤回采安全提供了有力保障等优点。(The invention discloses a bottom structure construction method of a false bottom of a filling body of a mine field, which relates to the technical field of underground mining of mines and comprises the following steps: selecting a filled stope of a chamber, wherein the filling strength and the maintenance period meet the requirements, and the stope has excavation conditions for later use; during excavation, firstly excavating an ore removal route from the drift to the inside, then constructing a medium-hole rock drilling roadway, after the roadway construction is finished, constructing and cutting a raise and a medium-deep hole until the medium-deep hole blasting is finished, and forming an ore receiving structure at the bottom of the V-shaped temporary trench; the method has the advantages that the stoping ore is more, the ore loss rate is obviously reduced, the blasting vibration influence on ore removal vein penetration is reduced, and powerful guarantee is provided for the stoping safety of the two subsequent steps.)

1. A bottom structure construction method of a false bottom of a filling body of a mine site is characterized by comprising the following steps: comprises the following steps:

(1) selecting a filled stope of a chamber, wherein the filling strength and the maintenance period meet the requirements, and the stope has excavation conditions for later use;

(2) During excavation, an ore removal route is excavated from the drift to the inside, then a middle-hole rock drilling roadway is constructed, after the roadway construction is finished, a raise and a middle-hole are constructed and cut until the middle-hole blasting is finished, and an ore receiving structure at the bottom of the V-shaped temporary trench is formed.

2. The method for constructing a substructure of a false bottom of a filling body of a mine according to claim 1, wherein the mine is filled with high-strength sand and ash.

3. The method of constructing a substructure according to claim 2, wherein the stope uses a lower stoping mid-section jack as a false bottom.

4. The method for constructing the bottom structure of the false bottom of the filling body of the mine field according to claim 3, wherein a bottom V-shaped temporary trench roadway is formed after the filling body is dug in the step 2.

Technical Field

The invention relates to the technical field of underground mining, in particular to a bottom structure construction method of a false bottom of a filling body of a mine field.

Background

The stope bottom structure has great influence on the selection of a mining method, the technical and economic effects and the safety degree of stoping work, the selection of a reasonable bottom structure is one of key contents of the design of the mining method, the existing mining method is mainly a flat-bottom structure mining method, and the problems of large bottom column damage, unsafe ore removal and high ore loss rate can occur when the flat-bottom structure is adopted for ore removal although the structure is simple and the amount of mining preparation engineering is small.

Disclosure of Invention

The invention aims to solve the technical problem of providing a bottom structure construction method of a filling body false bottom of a mine field, and aims to solve the problems of large bottom column damage, unsafe ore removal and high ore loss rate in a flat-bottom structure mining method in the prior art described in the background technology.

In order to achieve the above purpose, the present invention provides the following technical solutions:

a bottom structure construction method of a false bottom of a filling body of a mine field comprises the following steps:

(1) selecting a filled stope of a chamber, wherein the filling strength and the maintenance period meet the requirements, and the stope has excavation conditions for later use;

(2) during excavation, an ore removal route is excavated from the drift to the inside, then a middle-hole rock drilling roadway is constructed, after the roadway construction is finished, a raise and a middle-hole are constructed and cut until the middle-hole blasting is finished, and an ore receiving structure at the bottom of the V-shaped temporary trench is formed.

Preferably: the stope is filled with high-strength sand.

Preferably: the stope utilizes a middle-section top pillar mined from the lower part as a false bottom.

Preferably: and (3) after the filling body is dug in the step (2), forming a V-shaped temporary trench roadway at the bottom. The beneficial effect of adopting above technical scheme is:

compared with a flat bottom structure, the mining machine has the advantages that the quantity of mined ores is large, the ore loss rate is obviously reduced, the blasting vibration influence on ore removal and vein penetration is reduced, and the mining machine provides powerful guarantee for the mining safety of the two subsequent steps.

Drawings

FIG. 1 is a schematic structural diagram of the bottom structure of the false bottom of the filling body of the mine field.

Detailed Description

The following detailed description of embodiments of the invention:

example 1

A bottom structure construction method of a false bottom of a filling body of a mine field comprises the following steps:

(1) selecting a stope filled stope of the mine, wherein the stope is filled by adopting high-strength sand ash, the filling strength and the maintenance period meet the requirements, and the stope middle section of the lower stope is used as a false bottom after the stope middle section of the stope meets the excavation conditions;

(2) during excavation, an ore removal route is excavated from the drift to the inside, then a middle-hole rock drilling roadway is constructed, after the roadway construction is finished, a raise and a middle-hole are constructed and cut until the middle-hole blasting is finished, and an ore receiving structure at the bottom of the V-shaped temporary trench is formed.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept of the present invention, and these changes and modifications are all within the scope of the present invention.