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The method of carbon dioxide phase change coal seam cracker to treat the floor drum of coal mine roadway

A technology of carbon dioxide and coal mine roadway, applied in drilling equipment and methods, mining equipment, earthwork drilling and other directions, can solve the problems of flying out and poor effect, and achieve the effects of high efficiency, avoiding hidden dangers of flying out and convenient operation.

Active Publication Date: 2019-01-04
CCTEG SHENYANG RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The carbon dioxide phase-change coal seam cracker was directly used to deal with the bottom drum experiment of coal mine roadway, but the carbon dioxide phase-change coal seam cracker with vertical blast holes generally has the phenomenon of flying out after blasting, while the use of inclined blast holes The carbon dioxide phase change coal seam cracker sometimes has poor effect

Method used

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  • The method of carbon dioxide phase change coal seam cracker to treat the floor drum of coal mine roadway
  • The method of carbon dioxide phase change coal seam cracker to treat the floor drum of coal mine roadway
  • The method of carbon dioxide phase change coal seam cracker to treat the floor drum of coal mine roadway

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0017] see figure 1 , figure 2 , image 3 , Figure 4 , a carbon dioxide phase-change coal seam cracker treatment method for coal mine roadway floor drum, characterized in that: determine the maximum length of the minimum resistance line 31: W max =[pgdt / (r.u)] 1 / 2 , where: W max is the maximum length of the minimum resistance line 31, m; p is the burst pressure, MPa; g is the acceleration of gravity, 9.8m / s 2 ;d is the diameter of the borehole, m; t is the blasting action time, s; r is the specific gravity of the rock, t / m 3 ; u is the minimum moving speed that must be passed to the rock, m / s, and the angle α=arctan (W max / S), degrees; where: S is the length of the blasting point from the orifice, m; according to the result of the above formula, a single hole is drilled on the floor drum 2 of the roadway when drilling a single hole; After the first drill hole is drilled at the rightmost end, the depth of the drill hole ensures that the blast hole position 30 of the c...

no. 2 example

[0019] see figure 1 , figure 2 , image 3 , Figure 4 , a carbon dioxide phase-change coal seam cracker treatment method for coal mine roadway floor drum, characterized in that: determine the maximum length of the minimum resistance line 31: W max =[pgdt / (r.u)] 1 / 2 , where: W max is the maximum length of the minimum resistance line 31, m; p is the burst pressure, MPa; g is the acceleration of gravity, 9.8m / s 2 ;d is the diameter of the borehole, m; t is the blasting action time, s; r is the specific gravity of the rock, t / m 3 ; u is the minimum moving speed that must be passed to the rock, m / s, and the angle α=arctan (W max / S), degrees; where: S is the length of the blasting point from the orifice, m; according to the result of the above formula, a single hole is drilled on the floor drum 2 of the roadway when drilling a single hole; After the first drill hole is drilled at the rightmost end, the depth of the drill hole ensures that the blast hole position 30 of the c...

no. 3 example

[0022] see figure 1 , figure 2 , image 3 , Figure 4 , a carbon dioxide phase-change coal seam cracker treatment method for coal mine roadway floor drum, characterized in that: determine the maximum length of the minimum resistance line 31: W max =[pgdt / (r.u)] 1 / 2 , where: W max is the maximum length of the minimum resistance line 31, m; p is the burst pressure, MPa; g is the acceleration of gravity, 9.8m / s 2 ;d is the diameter of the borehole, m; t is the blasting action time, s; r is the specific gravity of the rock, t / m 3 ; u is the minimum moving speed that must be passed to the rock, m / s, and the angle α=arctan (W max / S), degrees; where: S is the length of the blasting point from the orifice, m; according to the result of the above formula, a single hole is drilled on the floor drum 2 of the roadway when drilling a single hole; After the first drill hole is drilled at the rightmost end, the depth of the drill hole ensures that the blast hole position 30 of the c...

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Abstract

The invention relates to a method for treating a coal mine tunnel bottom heave through a carbon dioxide phase change coal seam cracking device. The method is characterized by comprising the following steps: confirming the maximal length of the minimum burden: Wmax=[pgdt / (r.u)]1 / 2, wherein an inclined angle between a drill hole and a tunnel base plate is equal to arctan (Wmax / S); drilling a hole in the tunnel bottom heave while drilling a single hole; while drilling a plurality of holes, drilling the first hole at the rightmost end of the tunnel bottom heave, and then ensuring the position of an explosion vent hole under the tunnel base plate through the drilling depth, wherein the other holes are parallel to the first hole drilled at the rightmost end and the vertical distance between the holes is Wmax, the maximal length of the minimum burden; when the carbon dioxide phase change coal seam cracking device is inserted into the vertical explosion vent hole, wedging a fixing part between the orifice and the carbon dioxide phase change coal seam cracking device; detonating and processing the coal mine tunnel bottom heave through the carbon dioxide phase change coal seam cracking device. According to the invention, the dust is not raised; the coal-dust explosion hidden danger caused by detonation is eliminated; the flying hidden danger of the carbon dioxide phase change coal seam cracking device is avoided; no shock wave is generated; the operation is convenient; the efficiency is high; the method is intrinsically safe; the effect of processing the coal mine tunnel bottom heave is promoted.

Description

technical field [0001] The invention relates to a method for treating the bottom drum of a coal mine roadway, in particular to a method for treating the bottom drum of a coal mine roadway by a carbon dioxide phase-change coal seam cracker. Background technique [0002] In the process of dealing with the bottom drum of coal mine roadway, hard and dense rocks are encountered, and the construction progress is slow. Pneumatic rock drills are usually used underground to break them, and the efficiency is low. This process requires a lot of manpower and time, and there are great safety hazards, such as rock Flying, rock dust is dense, and the working environment is harsh. [0003] Carbon dioxide phase change coal seam cracker is a new type of blasting equipment used in coal mining. Different from traditional gunpowder blasting equipment, there is no leakage of flame during the blasting process. The principle is to use the physical properties of carbon dioxide to pressurize and liq...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21F17/00E21B7/00F42D3/04
CPCE21B7/00E21F17/00F42D3/04
Inventor 张柏林李豪君张家行乔晓光雷云谯永刚王海东黄玉玺
Owner CCTEG SHENYANG RES INST