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Coal mine impact ground pressure prevention structure and method

A technology for rock burst and coal mines, which is applied in the field of coal mine rock burst prevention and control structures, can solve problems such as uncertain effects, incomplete clarity of rock burst, and failure to fully consider the influence of remote force sources, so as to achieve prevention and control of rock burst, The effect of preventing rock burst

Inactive Publication Date: 2019-11-08
TIANDI SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the force source of rock burst is not completely clear, so there is great uncertainty in the effect of the control technology adopted
Taking the roadway rock burst control of coal mining face as an example, the measures currently adopted mainly include roadway pressure relief, pressure monitoring and early warning, and strengthening roadway protection; The influence of end force

Method used

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  • Coal mine impact ground pressure prevention structure and method
  • Coal mine impact ground pressure prevention structure and method
  • Coal mine impact ground pressure prevention structure and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Such as Figure 1-7As shown, a coal mine rock burst prevention and control structure includes a first coal seam working face 101, a second coal seam working face 103 and a coal mining roadway 3, and the coal mining roadway 3 is located between the first coal seam working face 101 and the second coal seam working face 103 Among them, the coal seam of the first coal seam working face 101 has been fully mined, and the coal seam in the second coal seam working face 103 is being recovered, and it is characterized in that it also includes a fracture gap zone 2, and the fracture gap zone 2 is located in the second coal seam working surface. In the rock formation 7 above the face 103 , the fracture void zone 2 is parallel to the extension direction of the coal mining roadway 3 and inclined toward the first coal seam working face 101 .

[0043] The beneficial effect of this embodiment is: the stratum above the first coal seam working face that has been mined will collapse, formi...

Embodiment 2

[0045] Such as Figure 1-7 As shown, a coal mine rock burst prevention and control structure includes a first coal seam working face 101, a second coal seam working face 103 and a coal mining roadway 3, and the coal mining roadway 3 is located between the first coal seam working face 101 and the second coal seam working face 103 Among them, the coal seam of the first coal seam working face 101 has been fully mined, and the coal seam in the second coal seam working face 103 is being recovered, and it is characterized in that it also includes a fracture gap zone 2, and the fracture gap zone 2 is located in the second coal seam working surface. In the rock formation above the face 103 , the fracture void zone 2 is parallel to the extension direction of the coal mining roadway 3 and inclined toward the first coal seam working face 101 .

[0046] The stratum above the first coal seam working face 101 that has been mined will collapse, forming collapse zones, fissure zones and bendi...

Embodiment 3

[0062] Such as Figure 1-7 As shown, a method for preventing and controlling rock burst in coal mines, forming the above-mentioned structure for preventing and controlling rock burst in coal mines, and a method for forming a fracture gap zone include steps:

[0063] S11: Excavate a rock formation auxiliary roadway 4 parallel to the coal mining roadway 3 in the upper rock formation 7 of the second coal seam working face 103;

[0064] S12: In the auxiliary rock formation 4 formed in S11, drill holes obliquely upward to form the first fracture hole and / or drill obliquely downward to form the second fracture hole, the first fracture hole and the second fracture hole are set correspondingly, and the second fracture hole The length directions of the first fracture hole and the second fracture hole are both inclined towards the first coal seam working face 101;

[0065] S13: Form a fracture void zone 2 in the first fracture hole and / or the second fracture hole in a fracturing manner...

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Abstract

The invention relates to a coal mine impact ground pressure prevention structure and method. A first coal seam working face, a second coal seam working face and a coal mining roadway are included, wherein the coal mining roadway is located between the first coal seam working face and the second coal seam working face, mining of a coal seam of the first coal seam working face is completed, and a coal seam of the second coal seam working face is recovered at the time; a fracture gap zone is also included, the fracture gap zone is located in an upper rock layer of the second coal seam working face, the extension direction of the fracture gap zone is parallel to the extension direction of the coal mining roadway, and the fracture gap zone is inclined towards the first coal seam working face; and the mining pressure of multiple rock layers above the coal seams is transferred to the interiors of the coal seam working faces through the fracture gap zone, so that the additional pressure insidethe coal mining roadway and inside the surrounding rock range of the coal mining roadway is reduced or weakened, and the aim of reducing, weakening or even preventing the impact ground pressure generated in the coal mining roadway is achieved.

Description

technical field [0001] The invention relates to the field of prevention and control of rock burst disasters in coal mine mining, in particular to a structure and method for prevention and control of rock burst in coal mines. Background technique [0002] Rock burst is a typical mine pressure disaster encountered in the process of coal mining. With the increase of coal mining intensity, the increase of mining depth and the expansion of mining scope, the number of coal mines with rock burst is increasing year by year, and the disasters caused are becoming more and more serious. , become a huge threat to coal mine safety production. The formation mechanism of rock burst is complex, sudden and violent, and it is a technical problem to be solved urgently in deep coal mine mining. At present, the force source of rock burst is not completely clear, so there is great uncertainty in the effect of the control technology adopted. Taking the control of roadway rock burst in coal minin...

Claims

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Application Information

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IPC IPC(8): E21C41/18
CPCE21C41/18
Inventor 刘海青
Owner TIANDI SCI & TECH CO LTD
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