CN102174892A

CN102174892A - Rotary cutting type cross-cut coal uncovering method

Info

Publication number: CN102174892A
Application number: CN2011100570590A
Authority: CN
Inventors: 吴海进; 黄小强; 张金亮
Original assignee: GUIZHOU ZHU AN MINING TECHNOLOGY Co Ltd
Current assignee: GUIZHOU ZHU AN MINING TECHNOLOGY Co Ltd
Priority date: 2011-03-10
Filing date: 2011-03-10
Publication date: 2011-09-07

Abstract

The invention discloses a rotary cutting type cross-cut coal uncovering method, belonging to a cross-cut coal uncovering method, aiming at providing a cross-cut coal uncovering method which is featured with short construction period, high working efficiency, and good economic property. The method comprises the following step of: drilling at least one measure hole and at least one residue discharging hole on a cross-cut coal uncovering working section; performing gap cutting operation to a coal bed through the measure hole so as to form a space, and discharging coal powder generated during the gap cutting operation by the residue discharging hole; sending an aeration model to the formed cavity through the measure hole, and aerating the aeration model; pouring concrete in the residual spatial area in the cavity through the residue discharging hole; and after the concrete is solidified, performing development operation, and uncovering the coal bed. According to the method in the invention, the influence of submerged jet on the gap cutting effect can be reduced; a plurality of problems that drill rods are locked, and the nozzles are blocked caused because the powder discharging quantity is less than the coal powder quantity generated during the gap cutting operation can be prevented; and the rotary cutting type cross-cut coal uncovering method is an ideal cross-cut coal uncovering method.

Description

Rotary-cutting type stone door punching coal method

Technical field: the present invention relates to a kind of coal mine underground coal bed method that discloses, relate in particular to a kind of stone door punching coal method.

Background technology: at present, mainly there is long construction period in the method that China discloses the coal seam, and human and material resources and financial resources have high input, many defectives such as inefficiency.

Summary of the invention: at the above-mentioned defective that exists in the prior art, the present invention aims to provide the rotary-cutting type stone door punching coal method of a kind of short construction period, human and material resources and financial resources less investment.

To achieve these goals, the present invention is by the following technical solutions:

1) boring at least one measure hole at the midline position of stone door punching coal work section reaches projected depth, bores at least one mud hole at exposed coal work section near the position of seat earth and reach projected depth;

2) by described measure hole the slot operation is carried out until form a cavity that reaches design capacity in the coal seam in the coal seam, discharge the coal dust that the slot operation is produced by described mud hole;

3) will inflate model by the measure hole and send in the described cavity, the gas that utilizes chemical reaction to produce is inflated the inflation model, fully supports until the front and back walls of this inflation model with cavity;

4) to cavity, inject concrete from mud hole, until concrete will by four faces in upper and lower, left and right of described inflation model respectively and the remaining space that forms between the roof of cavity, diapire, Zuo Bi, right wall fill up;

5) treat that described concrete setting carries out excavation operation later on again, disclose the coal seam.

In technique scheme, the distance 〉=1.5m between the end in measure hole and the end of mud hole; For the ease of discharging coal dust, mud hole is the low dip setting of high back with respect to the horizontal plane.

Compared with the prior art, therefore the present invention not only can reduce construction volume, shorten construction period owing to adopted technique scheme, has reduced human and material resources and financial resources input, but also has reduced the influence of submerged jets to the slot effect; In addition,, therefore reduced row's powder amount in measure hole, thereby avoided the measure hole to cause problems such as drilling rod locking, spray nozzle clogging less than the coal dust amount that the slot operation produces because of row's powder amount owing to can discharge coal dust by mud hole.

Description of drawings:

Fig. 1 is a borehole pattern of the present invention;

Fig. 2 is the design sketch after the present invention finishes the coal seam cutting operation;

Fig. 3 is the design sketch after the present invention finishes inflation of inflation model and concrete perfusion;

Fig. 4 is final effect figure of the present invention;

Fig. 5 is the A-A sectional view among Fig. 3.

Among the figure: 4 mud holes, 5 cavitys, 6 inflation models, 7 concrete eights of 1 lithosphere, 2 exposed coal work sections, 3 measure holes, coal seam

The specific embodiment: the invention will be further described below in conjunction with accompanying drawing and specific embodiment:

1) as shown in Figure 1, utilizing the patent No. is that the high-pressure abradant jet current of " ZL200720043590.1 " bores and to cut integrated protrusion-dispelling equipment and the patent No. of cutting and cut bit Integrated midline position stone door punching coal work section 3 (being heading end) for the voltage-controlled brill of " ZL200720043589.9 ", passes lithosphere 2 along the operation direction of propulsion and bores at least one measure hole 4 and reach projected depth, utilize auger stem to pass lithosphere 2 near the position of seat earths along the direction of propulsion of operation at exposed coal work section 3 to bore at least one mud hole 5 and reach projected depth;

2) as shown in Figure 2, utilize described high-pressure abradant jet current to bore to cut integrated protrusion-dispelling equipment and the voltage-controlled brill of cutting to cut and bit Integratedly carry out conventional slot operation, until in coal seam 1, forming the cavity 6 that reaches design capacity by 4 pairs of coal seams, measure hole 1; Open rig and drive the auger stem fast idle in the slot operation, the coal dust that the slot operation is produced is discharged by mud hole 5 under the effect of auger stem, with row's powder burden in alleviating measures hole 4;

3) as Fig. 3, shown in Figure 5, respectively voltage-controlled brill is cut bit Integrated and auger stem and from measure hole 4, mud hole 5, withdraw from, will inflate model 7 with the rubber combined balloon-like that forms by the high strength nylon fabric and send in the cavity 6 by measure hole 4; The gas that utilizes chemical reaction to produce is inflated inflation model 7, and the front and rear wall with cavity 6 after inflation model 7 expands fully supports; All leave the space between the left and right side of inflation model 7 and the left and right sides wall of cavity 6 and between the top diapire of the top and bottom of inflation model 7 and cavity 6;

4) as Fig. 3, shown in Figure 5, to cavity 6, inject concrete eight from mud hole 5, until concrete eight will by four faces in upper and lower, left and right of inflation model 7 respectively and the remaining space that forms between the roof of cavity 6, diapire, Zuo Bi, right wall fill up;

5) as Fig. 4, shown in Figure 5, treat that concrete eight solidifies after the supporting frame that forms " a returning " font in cavity 6, carry out excavation operation more according to a conventional method, disclose the coal seam.

In the above-described embodiments, the distance 〉=1.5m between measure hole 4 ends and mud hole 5 ends; The quantity of measure hole 4 and mud hole 5 can be adjusted in real time according to the size of drift section and the actual effect of coal seam slot operation.For the ease of discharging coal dust, mud hole 5 with respect to the horizontal plane is obliquely installed by the low mode in preceding high back.

Claims

1. rotary-cutting type stone door punching coal method is characterized in that concrete steps are as follows:

2. rotary-cutting type stone door punching coal method according to claim 1 is characterized in that: the distance 〉=1.5m between the end in measure hole and the end of mud hole.

3. rotary-cutting type stone door punching coal method according to claim 1 and 2 is characterized in that: mud hole is the low dip setting of high back with respect to the horizontal plane.