CN113756810A - Grooving method for reserving cutting well to form blasting compensation space - Google Patents

Abstract

A grooving method for reserving a cutting well to form a blasting compensation space belongs to the technical field of underground mining methods and is used for performing cutting groove construction by a filling mining method. The technical scheme is as follows: the method comprises the steps of ore block division → ore block preparation construction → first mining block cutting groove construction → first mining block stoping → airbag arrangement reserved cutting well → first mining block filling → recycling airbag → secondary ore block stoping → secondary ore block filling and the like. The invention is the first creation of a filling mining method, and solves the problems that the construction process of a cutting well is complex, the efficiency is low, the cost is high, and the mining efficiency of the landed mine is restricted for a long time. The air bag reserved in the inner dead zone of the first mining block close to one side of the second mining block serves as a blasting free surface of the cutting groove, so that the function of a cutting well is achieved, the working procedures of constructing the cutting well are reduced, and the mining efficiency of the ore block is effectively improved; meanwhile, the cutting well is formed after the air bag is recovered, the blasting free surface of the cutting groove can be formed after the filling body is solidified, and the construction time of the cutting groove is greatly shortened.

Description

Grooving method for reserving cutting well to form blasting compensation space

Technical Field

The invention relates to a grooving method for reserving a cutting well to form a blasting compensation space, and belongs to the technical field of underground mining methods.

Background

At present, when most metal mines use a filling mining method, a cutting well is generally formed by firstly blasting in a cutting roadway in the forming process of a cutting groove, after the construction of the cutting well is completed, a medium-length hole is constructed through the cutting roadway, the cutting well is utilized to form the cutting groove for blasting a free surface, so that a compensation space is provided for subsequent blasting, and ore caving is performed by blasting after groove forming. In the stoping process of the chamber, each chamber needs to form a cutting well firstly, so that the construction engineering quantity of the cutting well is greatly increased when the chamber is stoped, and particularly, when adjacent chambers are mined, after the mined chambers are filled and reach the stoping condition of the next chamber, the cutting well needs to be constructed again by adopting a drilling and blasting method to serve as the blasting free surface of the cutting groove. When the underground mine adopts the blasting method to construct the cutting well, the construction process of the cutting well is complex, the efficiency is low, the cost is high, the mining efficiency of the underground mine is restricted for a long time, and the problem which is difficult to solve in the industry for a long time is solved.

Disclosure of Invention

The invention aims to solve the technical problem of providing a grooving method for reserving a cutting well to form a blasting compensation space, which can ensure that blasting ore breaking conditions can be quickly formed in a stope, the grooving efficiency is high, the mining cost is reduced, and the requirement on the production capacity is met.

The technical scheme for solving the technical problems is as follows:

a grooving method for reserving a cutting well to form a blasting compensation space comprises the following steps:

a. and (3) dividing ore blocks: dividing a plurality of ore blocks in the panel area according to the trend, the thickness and the production capacity of the ore body;

b. and (3) mining and constructing ore blocks: constructing an upper mining roadway at the upper part of the ore block, and constructing a lower mining roadway at the lower part of the ore block;

c. first mining block cutting groove construction: firstly constructing a cutting well on the upper part of a first mining ore block by adopting a drilling and blasting method, and then forming a cutting groove by adopting the cutting well as a blasting free surface through a drilling and blasting method;

d. first mining block stoping: on the upper part of the ore block, blasting explosive is filled at one side of the cutting groove by using the drilled blast holes of the cutting groove of the rock drilling trolley, blasting one row for the first time, then blasting one row to two rows each time, and transporting the caving ore to a chute by using an electric scraper in an ore removal roadway at the lower part of the ore block;

e. laying an air bag reserved cutting well: fixedly mounting an air bag on one side close to the secondary mining block, wherein the diameter of the air bag is the same as that of the cutting well;

f. filling a first mining block: building a filling retaining wall in a lower mining standard roadway of the ore block, and carrying out tailing cemented filling on a first mining block dead zone and the lower mining standard roadway below the first mining block dead zone;

g. and (3) recovering the air bag: recovering the air bag after the filling body in the goaf of the first mining block is solidified, wherein a hole generated by the air bag is a cutting well and is used as a free surface for blasting a cutting groove of the secondary mining block;

h. and (3) stoping of a secondary mining block: arranging cutting groove blast holes on one side of the cutting well by using a drill jumbo, wherein the arrangement number of the cutting groove blast holes is consistent with the length of the cutting groove, filling explosives into the cutting groove blast into grooves in a segmented and successive manner in the direction of the cutting well, then blasting ore caving by using the cutting groove as a blasting free surface, and shoveling and transporting ores into a chute by using an electric shovel conveyer for the ore caving;

i. filling a secondary mining block: carrying out cemented filling on the secondary mining block dead zone and a lower mining standard roadway below the secondary mining block dead zone by using tailings;

j. and (3) repeated construction: and e, repeating the steps e-i until all ore blocks in the single panel are completely mined and filled.

According to the grooving method for forming the blasting compensation space by reserving the cutting well, the diameter of the cutting well is 2m, and the diameter of the air bag is 2 m.

The invention has the beneficial effects that:

the invention is the first creation of a filling mining method, and solves the problems of complex construction process, low efficiency and high cost of the cutting well in the industry and the restriction on the mining efficiency of landing the mine for a long time.

Compared with the conventional drilling and blasting method that the cutting well is constructed firstly and then is blasted into the cutting groove for the free surface, the air bag reserved on one side of the secondary mining block in the dead zone of the first mining block is used as the blasting free surface of the cutting groove, so that the effect of the cutting well is achieved, the working procedure of constructing the cutting well by the drilling and blasting method is reduced, and the mining efficiency of the ore block is effectively improved; meanwhile, the cutting well is formed after the air bag is recovered, namely the blasting free surface of the cutting groove of the ore block can be formed after the filling body is solidified, so that the construction time of the cutting groove is greatly shortened; in addition, the air bag is convenient to fix and install and can be recycled.

Drawings

FIG. 1 is a schematic illustration of a lead mining block;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a schematic view of a gob of a block stope;

fig. 4 is a cross-sectional view of the present invention.

The figures are labeled as follows: ore body 1, time mining piece 2, first mining piece 3, cutting groove 4, upper portion mining roadway 5, lower part mining roadway 6, cutting well 7, cutting groove blast hole 8, first mining piece gob 9, reservation cutting well 10, first mining piece obturator 11.

Detailed Description

The grooving method for forming the blasting compensation space by reserving the cutting well comprises the following steps of:

step one, ore block division: and dividing a plurality of ore blocks in the plate area according to the trend, the thickness and the production capacity of the ore body.

Secondly, mining and constructing ore blocks: an upper mining roadway 5 is constructed on the upper part of the block, and a lower mining roadway 6 is constructed on the lower part of the block.

Fig. 1 shows that after the steps are completed, an ore body 1, a secondary mining block 2, a first mining block 3 and a cutting groove 4 are respectively arranged between an upper mining roadway 5 and a lower mining roadway 6.

Thirdly, constructing a cutting groove of the first mining block: a cutting well 7 is firstly constructed on the upper portion of the first mining block 3 by adopting a drilling and blasting method, and then the cutting well 7 is used as a blasting free surface to form a cutting groove 4 by adopting a drilling and blasting method.

Fourthly, first mining block stoping: on the upper part of the ore block, one side of the cutting groove 4 utilizes the drilled cutting groove blast hole of the rock drilling trolley to load explosives for blasting, one row is blasted for the first time, then one row to two rows can be blasted at each time, and the caving ore can be transported to the chute in the ore removal roadway at the lower part of the ore block by using the electric scraper.

Figure 2 shows that one side of the first mined block 3 has a cutting well 7 and an array of cutting slot blastholes 8.

Fifthly, laying an air bag reserved cutting well: and an air bag is fixedly installed on one side close to the secondary mining block 2, the diameter of the air bag is the same as that of the cutting well 7, the diameter of the cutting well 7 is 2m, and the diameter of the air bag is 2 m.

Sixth, first mining block filling: building a filling retaining wall in the lower mining standard roadway 6 of the ore block, and carrying out tailing cemented filling on the first mining block gob 9 and the lower mining standard roadway 6 below the first mining block gob 9;

fig. 3 shows the first mined block gob 9 and the lower standard roadway 6 below.

Seventh, recovering the air bag: after the filling body in the first mining block goaf 9 is solidified, recovering the air bag, wherein the hole generated by the air bag is the cutting well 7 and is used as a free surface for blasting the cutting groove 4 of the secondary mining block 2;

eighth step, extracting the secondary mining block: lay cutting groove big gun hole 8 in cutting well 7 one side with the drill jumbo, cutting groove big gun hole 8 is laid row number and is accorded with cutting groove 4 length, and cutting groove big gun hole 8 loads the explosive segmentation and explodes the grooving to cutting well 7 directions one by one, later explodes for blasting the free surface with cutting groove 4 again and collapses the ore, and the ore that collapses adopts electric scraper to carry the ore to the swift current in with the ore shovel.

Fig. 4 shows a cross-section of the cutting slot blastholes 8, the reserved cutting wells 10 and the first block infill 11.

Ninth step, filling a secondary mining block: carrying out cemented filling on the secondary mining block dead zone and the lower mining standard roadway 6 below the secondary mining block dead zone by using tailings;

tenth, repeating construction: and repeating the fifth step and the ninth step until all ore blocks in the single panel area are completely mined and filled.

Claims (2)

1. A grooving method for reserving a cutting well to form a blasting compensation space is characterized in that: the method comprises the following steps:

a. and (3) dividing ore blocks: dividing a plurality of ore blocks in the panel area according to the trend, the thickness and the production capacity of the ore body;

b. and (3) mining and constructing ore blocks: constructing an upper mining roadway (5) at the upper part of the ore block, and constructing a lower mining roadway (6) at the lower part of the ore block;

c. first mining block cutting groove construction: firstly constructing a cutting well (7) on the upper part of the first mining ore block (3) by adopting a drilling and blasting method, and then forming a cutting groove (4) by adopting the cutting well (7) as a blasting free surface through a drilling and blasting method;

d. first mining block stoping: on the upper part of the ore block, blasting is carried out by filling explosives into blast holes of the cutting groove (4) drilled by a rock drilling trolley on one side, one row is blasted for the first time, then one row to two rows can be blasted each time, and the blasted ore can be transported into a chute by an electric scraper in an ore removal roadway on the lower part of the ore block;

e. laying an air bag reserved cutting well: fixedly installing an air bag on one side close to the secondary mining block (2), wherein the diameter of the air bag is the same as that of the cutting well (7);

f. filling a first mining block: building a filling retaining wall in a lower mining standard roadway (6) of the ore block, and carrying out tailing cemented filling on a first mining block dead zone (9) and the lower mining standard roadway (6) below the first mining block dead zone (9);

g. and (3) recovering the air bag: after the filling body in the first mining block goaf (9) is solidified, recovering the air bag, wherein the hole generated by the air bag is a cutting well (7) and is used as a free surface for blasting the cutting groove (4) of the secondary mining block (2);

h. and (3) stoping of a secondary mining block: cutting groove blast holes (8) are distributed on one side of a cutting well (7) by using a rock drilling trolley, the distribution row number of the cutting groove blast holes (8) is matched with the length of the cutting groove (4), the cutting groove blast holes (8) are filled with explosives and are gradually blasted to form grooves in the direction of the cutting well (7), then the cutting groove (4) is used as a blasting free surface for blasting ore caving, and the ore which is blasted is shoveled and transported into a chute by using an electric shovel conveyer;

i. filling a secondary mining block: carrying out cemented filling on the secondary mining block dead zone and a lower mining standard roadway below the secondary mining block dead zone by using tailings;

j. and (3) repeated construction: and e, repeating the steps e-i until all ore blocks in the single panel are completely mined and filled.

2. The grooving method for forming a blasting compensation space in a reserved cutting well according to claim 1, wherein the grooving method comprises the following steps: the diameter of the cutting well (7) is 2m, and the diameter of the air bag is 2 m.

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